11
Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (2 S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒 盤⑪識曲⑬¢e艦職量:P鵬量翫gG騰㊥一盈晦醜§㊧ Shigeru TERAsHIMA*,Seizo NAKAo**and Naok量M TERAsHIMA,Shigeru,NAKAo,Seizo and MI㌘A,Naoki(1982) Sulfhr deep-sea sediments f由m the central P翫ci丘c,GH80-l cruise。B%JJ.0θ (8),P.369-379. A恥s愈職c重:One hundred and fifteen deep-sea sediments fピom the no Pacific were analyzed for total sulfur,total carbon,organic ca and water soluble chlorine・These samples were collected along for each,running貸om east ofthe Wake island to west ofTahiti,in GH80-1. Total sulfur content ranges丘om O・16%to O・51%,and averages sulfur is positively correlated with sea salts content。For the occu 80%of the total sulfUr is probably derived f士om the sea salts,and fo sulfhr,barite is to be a main origin。Su1丘de sulfhr is not detected in The content of organic carbon varies f士om O。07%to O.63%,and most cases,organic carbon is more abundant in the deep-sea surfa core samples。This may be related to the oxidation oforganic car ofthe sediments.The organic carbon contents ofthe survey area ar ofcoastal marine sediments fピom the sea-offofNortheast Japan o 亘鶴騰姐麗醜量⑪聡 It is generally known that sulfide sulfhdn the coastal marine sediments is produced fピom sulfate sulfhr during the process of bacterial sulfate reduction (BERNER,1970,JφRGENsEN, 豆977,and GoLDEABER6頗乙,1977)。The bacte- rial su1魚te reduction occurs only in the absence ofoxygen,and the sulfじr and organic matter contents arc positively correlated.in most cases.For the deep-sea sediments,however, there are fヒw data,as to the contents of sulfhr and carbon,and the details of geochemical ch批racteristics ofboth elements havc not been discussed. In the present investigation, 115 deep-sea sediments have been collected fヒom the north and south Central Pacinc during the cruise *Geochemistry&Tecknical Services Department **Marine GeologyDepartment GH80-1,Geological survey o sulfhr,total carbon,organi soluble sodium and water sol were analyzed fbr these sample know the chemical fbrmation of the su1釦r,su1魚te su1負1r and detemined fbr some selected s Localities of the an&1yzed shown in Table L More details o area and the comprehensi〉e s cruise have been reported NAKAo (1982),especially the m司or and some minor elemen sediments by SuGlsAKI and KIN and MITA66α」。(1982). S題蹴昼》且e聖麗睡し臨賦量⑪魍題膿量A鴎a且y慮量c蛆 M:et恥⑪d聴 The115samples fbr this study 丘om14piston cores and.25bo were taken fヒom3910cations o 一369 1 1

Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

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Page 1: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265)

S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒      盤⑪識曲⑬¢e艦職量:P鵬量翫gG騰㊥一盈晦醜§㊧

Shigeru TERAsHIMA*,Seizo NAKAo**and Naok量MITA*

TERAsHIMA,Shigeru,NAKAo,Seizo and MI㌘A,Naoki(1982) Sulfhr and carbon contents of

 deep-sea sediments f由m the central P翫ci丘c,GH80-l cruise。B%JJ.0θoJ.8π鍬」ψ伽,voL33

  (8),P.369-379.

A恥s愈職c重:One hundred and fifteen deep-sea sediments fピom the north and south Central

Pacific were analyzed for total sulfur,total carbon,organic carbon,water soluble sodium

and water soluble chlorine・These samples were collected along two tracks of4)000km long

for each,running貸om east ofthe Wake island to west ofTahiti,in a Hakurei.maru cruise,

GH80-1.     Total sulfur content ranges丘om O・16%to O・51%,and averages O・33%・The total

sulfur is positively correlated with sea salts content。For the occurrence of the sulfhr,about

80%of the total sulfUr is probably derived f士om the sea salts,and for the other part of the

sulfhr,barite is to be a main origin。Su1丘de sulfhr is not detected in the studied samples.

     The content of organic carbon varies f士om O。07%to O.63%,and averages O,20%.In

most cases,organic carbon is more abundant in the deep-sea surface sediments than in the

core samples。This may be related to the oxidation oforganic carbon in the uppermost part

ofthe sediments.The organic carbon contents ofthe survey area are clearly lower than those

ofcoastal marine sediments fピom the sea-offofNortheast Japan or around Japan Trench。

亘鶴騰姐麗醜量⑪聡

  It is generally known that sulfide sulfhdn

the coastal marine sediments is produced fピom

sulfate sulfhr during the process of bacterial

sulfate reduction (BERNER,1970,JφRGENsEN,

豆977,and GoLDEABER6頗乙,1977)。The bacte-

rial su1魚te reduction occurs only in the absence

ofoxygen,and the sulfじr and organic matter

contents arc positively correlated.in most

cases.For the deep-sea sediments,however,

there are fヒw data,as to the contents of sulfhr

and carbon,and the details of geochemical

ch批racteristics ofboth elements havc not been

discussed.

  In the present investigation, 115 deep-sea

sediments have been collected fヒom the north

and south Central Pacinc during the cruise

*Geochemistry&Tecknical Services Department

**Marine GeologyDepartment

GH80-1,Geological survey of Japan。Total

sulfhr,total carbon,organic carbon,water

soluble sodium and water soluble chlorine

were analyzed fbr these samples。In order to

know the chemical fbrmation and occurrence

of the su1釦r,su1魚te su1負1r and barium were

detemined fbr some selected samples.

  Localities of the an&1yzed samples are

shown in Table L More details of the survey

area and the comprehensi〉e studies of the

cruise have been reported by MlzuNo and

NAKAo (1982),especially the chemistry of

m司or and some minor elements fbr these

sediments by SuGlsAKI and KINosHITA(1982)

and MITA66α」。(1982).

S題蹴昼》且e聖麗睡し臨賦量⑪魍題膿量A鴎a且y慮量c蛆

             M:et恥⑪d聴

  The115samples fbr this study were selected

丘om14piston cores and.25box cores,which

were taken fヒom3910cations of the sur〉ey

一369

11

Page 2: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

B%1ああη(ゾ渉h6(穿80Jogσ6αJSz6r∂砂(~ブ」ψα?z,Vひ」.33,.〈b.8

    Table l Loc&1ities ofthe sampling stations.

Station No. Latitude L・ngitude Depth(卑) Sedimen重s

Mid・P&ciHc Mountains

  1647           16。10.14,N

  1590          15023.31,N

  1646      15022.48’N

  1645          14。06.61’N

  1644          13。16.99,N

Central Pacific Basin,Northern Part

1642

1641

1640

1639

1598

1638

11。06.38,N

9。46.81/N

8。57.86/N

7040.26/N

6。49.67,N

6048.65’N

17go19.82’W

178043.79’E

178。45.46’W

177047.28/W

177。08.35’W

175。30.67’W

174031.04’W

173。53.91’W

172。56.77’W

174。47.63’W

172015.46’W

5292

5287

5537

5068

5027

54生1

5829

5915

5926

5962

5791

Zeolitic mudZeolitic-rich clay

  ditto

  ditto

Zeolitic mud

Siliceous fossil-rich clay

 ditto

Siliceous mud

  ditto

Siliceous負》ssil-rich clay

Siliceous mud

Central Pacific Basin,Central Part

1600

1636

1601

1602

1635

1635A1634

1603

1633

1604

1632

1605

4。41.39’N

4。43.37,N

3。17.83/N

2。33.26,N

3。16.42/N

3。16.3rN

2。32.13,N

1。17.22/N

l o16.04/N

o o24.23/N

O。26.16/N

OQ57.91,S

173。11.89’W

170042.88’W

172010.5rW

171。37.69/W

169。40.10’W

16go40.25’W169。06.07/W

170。42.28’W

168。09.97,W

170002.51’W

167。33.83’W

16goO1。69’W

5584

5747

5350

5389

5351

5350

5087

5479

5359

5457

5255

5455

Central Pacific Basin,Southem Part and North Tokelau Basin

  1631     0。58.61’S   166。20.89’W    5342

  1630     1。30.45/S   165。52.52’W    5537

  1629     2。53.00’S   164。57.31/W    5261

  1607     3002.12’S   167029.91/W    5698

  1628     3。30.50’S  164。09。94’W    4947

ManihikiWestem Plateau and ManihikiNortheastem Basin

  1627     5。27.32’S   163。64.01’W    4995

  1625     7006.72’S   161056.68’W    4650

  1623     9。26.14’S  160。14。83’W    4561

  1613     9。29.32’S   16204L40’W    2944

Penrhyn Basin

1622

1621

1616

1620

1619

1617

1618

10。16.35/S

11。35.38/S

12Q20.07,S

12。26.44’S

13034.03,S

13。47.40,S

14029.61’S

159。35.57’W

158。34.91’W

160030.89’W

157。57.20’W

157。06.01’W

15go28.35/W

158052.98’W

5235

5312

5690

5285

5131

5162

5453

Siliceous mud

 ditto

 ditto

  ditto

Siliceous ooze

  ditto

Siliceous calcareous marly ooze

Siliceous mud

Siliceous ooze

Siliceous mud

Siliceous nanno mud

CaCO3-rich siliceous mud

Ca,1careous siliceous ooze

Siliceous mud

  ditto

  ditto

Siliceous fbssil-rich clayey

Siliceous calcareous最}ssil-rich mud

ClayeynamooozeCalcareousmarlyooze

Foramini£era、ooze

Zeolite-rich mud

 ditto

Pelagic clay

Zeolitic mud

  ditto

Pelagic cl&y

  ditto

area。ARer air-dried,samples were ground.to

under150mesh.The ground samples weredried at I IO oC 食)r 3 hours,and kept in a

desiccat・r.Thesesamplesarethesameas

those reported by MITA6渉α」・(1982)・

  The total sulfhr,total carbon and organic

carbon were analyzed.by an in丘ared absorp-

tion photometry after combustion,and water

370

Page 3: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

S%伽姻0励oη∫箆.D吻一56α38伽8傭(7セ郷h加α,陥んα・副ル伽)

soluble sodium and.barium were determined

by atomic absorption spectrometry.These

methods were described in TERAsHIMA6渉α」.

(1982).As fbr the other elements,water

soluble chlorine were analyzed by titrimetry,

and su1魚te sulfUr by gravimetry.Outlines of

theanalyticalprocedures餅these two elementsare g圭ven below.

  Analysis of water soluble chlorinel Weigh

O。2g of the sample into a test tube of50ml

with a stopper。After adding water to the

£xed volume,shake the mixture fbr about one

minute.Allow to stand fbr more than lO

minutes,filter with a filter paper(5:B),and

titrate by N/20silver nitrate solution・

  Analysis ofsu1飴te sulfUr:Weigh LOgofthe

sample into a beaker of300m1,and add30ml

of HC1 (1十2)。After covering,heat the

mixture fbr20minutes at about l OO。C,then

£1ter with a filter paper(5C).Determine

sulfate sulfhr in the丘1trate by a conventional

gravimetric method by adding barium chloride

solution.

shows that sulfide sulfhr is not present in the

samples.Namely,there may be no bacterial

su1魚tereductioninthesu蝉eyarea.

  Carbon:The content of organic carbon

varies 丘om O。07 to O.63%,and the average

is O.20%.The relationship between organic

carbon contents and,the depth below the

ocean bottom are given in Fig。2。It shows

that the su漁ce sediments are more abundant

in organic carbon than the subsur魚ce samples。

This maybe related to the oxidation oforganic

carbon in the upPermorst part of sediments・

The organic carbon is fヒ)undl in all the samples,

but the carbonate carbon is present in only

l4samples(Nos.18,52,53,59,67,75,76,

80,96,97,101,102,103,and lO4).In genera1,

carbonate carbon is present as the compounds

of calcium carbonate in deep-sea sed.iments.

:【)istribution of carbonate carbon calcurated

agrees with the results by SuGIsAKI and

:KINosH:ITA(1982)who reported geochemical

characteristics and geographical distribution

of the calcium carbonate in the survey area.

R⑱s聡旦重§鶴聡娼互》鼠se盟§s量⑪臨

  The analytical results fbr total sulfhr,

organic carbon,water soluble sodium and

water soluble chlorine are listed in Table2.

The contents of sulfate sulfUr, carbonate

carbon and barium in selected53samples are

given in Table3.The calculated values of

carbonate carbon are obtained by subtracting

organic carbon fピom the total carbon,

Ge聡e謡鋸pe醜  Sulfhr:The value oftotal sulfhr〉aries f士om

O.16to O。51%,and the average is O・33%・It

is generally known that sulfid,e sulfhr圭n the

coastalmarinesedimentsisproduced丘omsu1魚te sulfhr by bacterial sulfゑte reduction.

In order to know the presence of the sulfide

sulfじr in the samples studied,su1鉛te sulfじr

was analyzed{br some samples.The results

agree with the total sulfUr contents within the

experimental errors as shown in Fig。L It

⑪c礪蟹e聡ee⑱昼醐懸鐙  A large amount of su1魚te sulf巳r fヒom sea

salt is contained in the deep-sea sediments.

0。6

0.5

0.4

』 0、3

慧 0.2

出房

0.1

0.0

O  Core sample

㊥  Suγface sample

Q

Fig。1

0。0 0.1     0.2     0.3

   Totalsulfur(%)

0.4 0.5 0。6

Comparison of su1釦r contents determined by

in丘ared absorption photometry(total sulfUr)

and gravimetry(sul£ate sulfhr)・

一371一

Page 4: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

§

 韓

B%μθだη(ゾ診h60θoJogぎ6αJSz67zノ¢y(~ブJlψαη,レbJゲ33,ハ乙o。8

Table2 Analytical results of total sulfhr,organic carbon,water soluble sodium and water

  soluble chlorine fbr deep-sea sediments f}om the GH80-1cruise in we三ght percent.

No.StationNo.

Observ. No,

Location (cm)

Totalsul角皿

Organiccarbon

Watersoluble

sodium

Watersolublechlorine

123456789

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

1647

1590

1646

1645

1644

1642

1641

1640

1639

1598

1638

1600

1636

1601

1602

B32(c)

B2(s)

B31(c)

B30(c)

P179

Pl78

B29P177

B28B4P176

B5P175

B6B7

Surfゑce

 5-17

148-158

192-202

302-312

20-30

90-100

220-230

320-330

420430520-530

620-630

680-690

730-740

 5-20

127-137

227-237

287-297

347-357

427-437

525-535

625-635

725-735

Surface

10-20

124-134

224-234

324-334

424-434

522-532

602-612

697-707

Surf乞ce

 5-20

116-126

225-235

315-325

416-426

514-524

624-634

714-724

Surface

Surface

0.26

0.23

0.22

0.24

0.18

0.20

0.25

0.310.35.

0,33

0.29

0.35

0,34

0.30

0.26

0.22

0.19

0.27

0.27

0.35

0.37

0.35

0,33

0,27

0.32

0.36

0.35

0.32

0.35

0.34

0.36

0.39

0.31

0.38

0.35

0.33

0.33

0.40

0.35

0.33

0.37

0.32

0.38

0.37

0.38

0.39

0.41

0.41

0.34

0.27

0.31

0.37

0.16

0.11

0.13

0.140.17

0.17

0.15

0.14

0.14

0。14

0.13

0.12

0.10

0.38

0.24

0.15

0.16

0.17

0.16

0,15

0.13

0.15

0.16

0.48

0.43

0.17

0,17

0.14

0.13

0.10

0.09

0.11

0.09

0.47

0.29

0.17

0.17

0.16

0.16

0.15

0.13

0.14

0.61

0.52

2.40

2.33

2.42

3.05

1.43

1.92

1.68

2.53

3.63

3.22

3.24

3.61

3.65

2.97

3.22

2.39

2.03

3.85

3.59

4.74

4.76

4.97

4.67

3.76

4.71

4.40

4.61

4.72

4.87

4.41

4.78

4.90

4.52

4.33

4.00

4.48

4.29

5.62

4.64

4.82

5.05

4.55

4.75

5.00

5.17

5.10

5.30

5.54

3.70

3.11

3.52

4.47

1.89

2.54

2.39

3.11

5.17

5。25

4.70

5。07

5.26

4.35

4.443.31

2.37

5.66

5.27

7.47

7.44

7.12

6.68

5.52

6.92

6.25

7.13

6.84

7.62

6.56

6.85

7.45

6.33

6.60

6.39

6.28

6.33

7.96

6.92

6.90

7.13

6.84

7.12

7.06

7.63

7.53

8.058.68,

_372一

Page 5: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

3喚7αη4σ励・η伽D卿一56α36伽6傭(τ診7α5h伽α,瓦漁・αη4M伽)

Table2(continued)

No.StationNo.

Observ. No,

LOCαtion (cm)

Totalsulfhr

Organiccarbon

Watersoluble

sodium

Watersoluble

chlorine

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

1635

1635A

1634

1603

1633

1604

1632

1605

1631

1630

1629

1607

1628

B26P174

P173

P159

B25(c)

B8P172

1》160

B24(c)

P171

B23(c〉

P161

P170

50-60

731-741

50-60

138-148

238-248

318-328

438-448

535-545

635-645

735-745

 0-15

57-67

237-247

437-447

637-647

20-30

122-132

202-212

312-322

422-432

522-532

602-612

722-732

 6-16

162-172

362-372

562-572

741-752

Surface

15-34

36-46

136-146

231-241

338-348

423433523-533

613-623

723-733

Surface

 15-30

26-36

226-236

516-526

716-726

 10-25

0.41

0.33

0.37

0.34

0.33

0.35

0.38

0.37

0.49

0.41

0.30

0.42

0.48

0.40

0.32

0.36

0.44

0.40

0.32

0,39

0.45

0.37

0.35

0.38

0.40

0.41

0.29

0。34

0.37

0.34

0.41

0.42

0.29

0.31

0。32

0.32

0.32

0.31

0.32

0.31

0.30

0.43

0.28

0.27

0。34

0.22

0.31

0.25

0.47

0.09

0。07

0.11

0.13

0.14

0.13

0.07

0.11

0.08

0.13

0,29

0。12

0.09

0.09

0.08

0.58

0.63

0.14

0.19

0.17

0.15

0.15

0。15

0.13

0.13

0.24

0.16

0.16

0.13

0.19

0.54

0.30

0.17

0.15

0.14

0.13

0。11

0.08

0.11

0.11

0。44

0.14

0.19

0.09

0.10

0.20

0.28

5.38

3.84

3.88

4.19

4.37

4.40

4.75

3.30

3.16

4.18

2.76

5.02

5。75

5.24

4.33

4.56

5.83

5.70

3.96

4.95

5.07

4.76

4.68

5。07

5.15

5.18

3.44

4.06

4.32

4.10

4.95

5.15

3.48

3.92

4.14

4.03

4.13

3.91

4.22

4.11

3.88

5.32

3.52

3.39

4.07

1.85

1.94

2.64

7.95

5.50

6。00

6.00

6.33

6。34

6.84

5.23

4.91

6.56

4.24

7.07

8.35

7.80

6.50

7.02

9.14

7.80

5.75

7.20

7.44

7.10

6.78

7.53

7.57

7。25

5.22

6.13

6.16

6.22

7.00

7.42

5.14

5.82

5.92

5.98

5.82

5.25

6.18

5.93

5.50

8.25

5.07

4.90

5.98

2.22

2.51

3.74

一373一

Page 6: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

β助伽ψh606・」・9勿α」勘妙げ」伽η,%」.33,葡.8

Table2 (continued)

No.StationNo.

Observ. No.

Location (cm)

Totalsulfhr

Organiccarbon

Watersolublesod五um

Watersoluble

chlorine

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

1627

1625

1623

1613

1622

1621

1616

1620

1619

1617

1618

B22(c)

B21(c)

:B20(c)

B12P167

B19(c)

B14B18(c)

B17(c)

B15(c〉

B16(c)

59-69

152-162

243-253

343-353

Surface

Surface

 5-20

33-43

178-188

375-385

575-585

Surface

Surface

Surface

Sur£ace

0.34

0.38

0.38

0.45

0.51

0.32

0.21

0.16

0.18

0.21

0.29

0.27

0.27

0.26

0.33

0.31

0.34

0.41

0.35

0.16

0.15

0.17

0.14

0.44

0.31

0.20

0.07

0.17

0.13

0.09

0.07

0.08

0.41

0.45

0.35

0.36

0.44

0.37

4.29

5.06

4.79

5.29

6.25

3.41

1.58

1.12

1.82

1.94

2.97

2.82

2.62

2.83

3.03

3.28

3.81

4。29

4.48

6.14

7.69

7.32

7.82

9.45

5.28

2.10

1.84

2.50

2.62

4.45

4.11

3.65

4.07

4.37

5.34

5.71

6.73

7.05

     Organiccarbon(%)

0・0 0・1 0。2 0.3 0.4 0.5 0.60

100

 200Eo

巨300βぢ』

の二 400-

3ロ

i』 500

530

 600

700

800

⑪ 歯『’③⑲罰♂麟⑬麟鵬⑪魯     ⑧鞠㊥

 ㊥  ㊥  ㊧霧翻⑱

  ㊥⑳面

⑲ ㊥

  ⑲㊥  鷲

   ⑭⑳

⑳評呼

呪調⑱ 窃

略㊥魑

@⑱

㊥躍㊥’

⑯ ⑧㊥

Fig・2 Plot of organic carbon contents to depth

   below the bottom ofthe sample.

In order to estimate the sulfate sulfhr of the

sea salt origin,water soluble sodium and

chlorine are analyze(L The relationship be-

tween the water soluble sodium and.chlorine

are illustrated.in Fig.3.There are clear

positive correlation. Concentration ratios of

sodium to chlorine are calculated fbr both

sea water and sodium chloride,and the

results are&1so illustrated in the figure。The

concentrations of water soluble sodium to

chlorine of the deep-sea sediments exisdn

the sodium-rich area of the sea water ratio.

丁雌s me&ns that water soluble sodium in the

sed:iments are not only fヒom the pore water,

but f}om the minerals1n the sediments.So,

the sulf巳r fヒom the sea salt should be better

estimated fヒom the water soluble chlorine

contents.

 The relationship between total sulfhr con.

tents and water soluble chlorine contents are

presented in Fig.4。There are clear positive

correlation,but the plots exist in the sulfhr-

rich area of the sea water ratio,This implies

一374一

Page 7: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

3%伽αη40励・厄ηZ)卿一36αSθ伽θ傭(7初5hぎ常α,陥んα・απ4ル伽)

Table3 Analytical results of sulfate sulfUr,carbonate carbon and barium for ocean-floor

  sediments fをom the GH80-1cruise in weight percent。

No.Su1£ate    Carbonate           BariumsulfUr     carbon*

134589

11

17

18

19

26

27

28

31

33

35

37

38

40

46

49

52

53

57

59

60

63

66

0.25

0.22

0.25

0.17

0.30

0.35

0.29

0.19

0.28

0.26

0.35

0.35

0.32

0.35

0.32

0.35

0.33

0.39

0.35

0.40

0.42

0.33

0.33

0.49

0.30

0.41

0.33

0.39

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.03

0.00

0.00

0.00

0.00

0.000.,00

0.00

0.00

0.00

0.00

0.00

0.00

1.45

0.04

0.00

2.37

0.00

0.00

0.00

0.27

0.08

0.22

0.18

0.05

0.47

0.25

0.06

0.07

0.11

0.23

0。18

0.12

0.21

0.16

0.16

0.18

0.15

0.15

0.37

0.21

0.27

0.30

0.87

0.32

0.27

0.16

0.16

No.Sulfatesulfur

Carbonatecarbon*

Barium

67

68

69

71

74

75

76

79

80

8493

94

95

96

97

100

101

102

103

104

105

106

107

109

114

0.33

0.39

0.44

0.36

0.42

0.29

0.33

0.43

0.42

0.31

0.34

0.22

0.31

0.25

0.35

0.46

0.52

0,31

0.20

0.15

0.19

0.19

0.29

0.26

0.42

2.96

0.00

0.00

0.00

0.00

2.31

0.34

0。00

0.33

0.00

0.00

0.00

0.00

5.19

0.30

0.00

0.32

4.81

8.2210.23

0.00

0.00

0.00

0.00

0.00

0.28

0.25

0.27

0.29

0.38

0.12

0.21

0.36

0.16

0.21

0.09

0.05n.d.

0.18

0.22

0.51

0.33

0.18

0.16

0.05

0.04

0.05

0.04

0.05

0.38

X(n=53) 0。33 0.73 0。21(n-52)

Nos.same as the Table2.n.d.=Not determine(1.

*Carbonate carbon was detected only in l4sampIes(Nos。18,52,53,59,67,75,76,80,96,97,101,102,103,and

 lO4)。

that there are other types of su1鉛te sulfUr,

beside the sulfate sulfhr contained in sea salt.

GoLDBERG and ARRHENlus(1958)have de-

scribed that barite is the most common

sulfじr-bearing mineral in deep-sea sediments。

In this study,barium was analyzed in some

selected samples,and the results are given in

Fig。5and are compared with corrected su1魚te

sulfUr contents』Most of the samples show a

positive correlation,though weakly,between

the barium and corrected sul飴te sulfUr.It

apPears that the sea salt origin sulfUr and

barite sulfUr&re the main portion of sulfヒr

occurring in the deep-sea sediments。

 The sul血r content of the sea salt origin in

the survey area ranges f}om O。09to O。44%,

averaging O.27%,whereas that ofthe corrected

sulfhr ranges丘om O。00to O.26% with an

average of O.058%。It means that about80%

of sulfUr in the sediment comes fヒom the sea

salts.

聡e且a電量⑰聡s騒聖恥e重wee餌欝⑱9量⑪聡箆亘Ψ認窟量鼠盛⑪聡s

a聡認重y欝e⑰聲se戯朧e聡慮s

 The regional variations of the average

contents of total sul血r (uncorrected and

corrected),organic carbon,carbonate carbon,

一一375一

Page 8: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

砲」6勧げ魏606・」・gJ6αIS%吻げ」α卿,%1.33,葡・8

10

9

8

7

6

駅 5

ω⊆

2‘ 4り

ω

』コ

5。0 3』①一

3

2

0

7ノ

                  ㊥                 !

                !學働

             ♂

            声

           藩

          騨

        輔・

       ノ㍗

      ♂灘㊥

     ノ!㊥

    1解

   ノ晶   ノ

  漁、

 !!@㊥

夕⑧

一  Sea water ratio

一一一 Sodium chloride ratio

 ノ

奪ノ

0 1 2 3 4 5 6

         Water soluble sodium ( % )

Fig.3 Relationship between water soluble sodium

    and water soluble chlorine.

10

9

8

7

6

)5ω=

』の

5 4ε£宕

』33窒

2

1

0

        ㊥  ⑧

      翻     瀞.1

    、爵

   ⑱㊧ ㊥ ⑧   %睡.

   躍:⑳

  あ   あ

  ゆ鴨・  ⑱            魯

   。⑱聴。

 oo魅0

o    o

 o も      ロ ~   oo   ⑯    ⑳   o

乱       ⑫&     ⑱ぎ   ¢o

(O)Mid-Pacific図。untainsandPenrhynBasin

(愈)Otherarea

Fig。4

0 0.1     0.2    0.3

 ’Totalsulfur(%)

0.4 0.5 0。6

Relationship between total sulfhr and water

soluble chlorine。

water soluble sodium and water soluble

chlorine are listed,in Table4.The uncorrected

total sulfhr,water soluble sodium and.water

soluble chlorine in the samples fヒom central

part of the survey area,Central PaciHc Basin

乱nd North Tokelau Basin,are slightly h圭gher

than those of both northern part as the Mid-

Paci丘c Mountains and southern part as the

Manihiki Westem Plateau,Manihiki North-

eastem Basin and Penryn Basin.Whereas the

corrected total sulfhrεしnd organic carbon in

the samples fヒom central part of the sur〉ey

area are lower than those of other areas.

This may be related to type of sediments and

bathymetric’or geographical situations of

deep-sea sedimentation.T&ble5gives the

average contents of some elements on various

types ofsediments.The contents ofuncorrected.

total sulfhr,water soluble sodium and water

soluble chlorine in the zeolitic sediments are

ω

ρ邸}

5

-Φ

一りω』』

oり

0。25

0.20

0.15

0.10

0.05

O.00

1!

魯         曾  ㊥

        ノ  ㊥   ㊥@!  ⑬⑲      @   ノ

      !③⑭  ⑱  ⑱ ㊥㊥

     !⑱   ⑱  ⑫

    !⑧翻  ㊥㈱@   ノ ㊥⑲斧㊥ 愈  ノ⑱醗 ㈱

  徊㊥ ノ騨 畠⑧

ノ @

1!

      ノ    、少

.ゲ

.!〆

Fig。5

 0        0.25       0.50      0。75       1。00

       Barium ( % )

Relationship between barium and corrected.

sulfate sulfhr。

一376一

Page 9: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

3%伽αη4σ励oη∫ηD6‘ψ一58α36伽備(7セ郷h伽α,油んα・副ル伽)

Table4 Average contents based on their localities in weight percent。

Area (n)

Total sulfhr

uncorrected

       Organic       carboncorrected*

       Water WaterCarbonate       soluble  solublecarbon       sodium  chlorine

Midlle Paci丘c Mountains      8Central Pacific Basin,Northern Part   29

Central Pacific Basin,Central part    42

C嚇離諮撫譜濫e「npa「t’}21

M櫨躍臨膿識謡}・PenrhynBasin        H

0.24

0.32

0.38

0.33

0.30

0.29

0.08

0.04

0.06

0.06

0.08

0.08

0.23

0.17

0.20

0.19

0.26

0.27

0.00

0.00

0.23

0.28

5.90

0.00

2.22

4.05

4.66

3.96

3.09

3.08

3.09

5.95

6.88

5.74

4.67

4.60

Average 115  0.33 0.058 0.20 0.34 4.00 5.88

*Values obtained by subtracting salt origin su1魚r from the analyzed value.

Table5 Average contents based on the type ofsediments in weight percent.

Sediment (n)

Total sulf㌔皿

uncorrected

       Organic       carboncorrected*

       Water WaterCarbonate       soluble  solublecarbon       sodium  chlorine

Ze盤盤紹欝hmud}Siliceous mud

Siliceous fossil-rich clay

Siliceouscalcareousmarlyooze

C&CO3-rich siliceous mud

16

50

16

85

0.25

0.34

0.32

0.37

0.35

0.08

0.04

0.07

0.10

0.06

0.22

0.19

0.19

0.11

0.18

0.00

0.00

0.35

0.48

0.53

2.49

4.45

3.67

3.89

4.17

3.57

6.52

5.37

5.81

6.15

*Same as in Table4.

clearly lower than those of siliceous mud,

siliceous R)ssil rich clay, siliceous calcareous

marly ooze and calcium carbonate richsiliceous mud.The relationship between water

soluble sodium and total sulfUr fbr zeolitic

sediments and siliceous muds are given in

Fig.6。There are clear Close correlation。And

the siliceous muds are much dominated by

both water soluble sodium and total sulfhr

than the zeolitic sediments.This魚ct implies

that the sea salts are abundant圭n the siliceous

muds.

 Organic carbon and water soluble chlorine

are correlated positively on the sur飯ce sam-

ples.However,those ofthe subsu曲ce samples

appear to have no correlation,as shown in

Fig.7.It fbllows that the organic carbon in

the sediment is supplied fヒom the sea water,

and the halfor more ofthemis lost byintensive

oxidation.:But this oxidation may be limited

only・to the uppermorst part of the sediments,

6.0

5.0

4.0

)3.OE

-o

三2.0

8茜信3 1。0

0.0

㊥ Sil iceous mud

oZeolit宅cmud,Zeoliterich

 mudandZeoliterichclay                                     ㊥㊥

                 ㊥⑱㊥㊥                ⑧喋

              @喉㊥⑱

               あゐ              あ    ゐ              曙.

             ㊥㊥            ㊥    o

            ㊥⑲            ㊥

拐鋭

O  o

o

  00

  0    00  00

oOO㊥

o0

   0       0.1      0.2      0●3      0.4      0。5

           Total sulfur ( % )

Fig.6 Relationship between total sulfur and water

    soluble sodium.

一377一

Page 10: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

B吻勘ψh6σθ・」・9づ64JS麗吻ヴ」伽η,殉」。33,葡。8

because more than O。07%oforganic carbon are

remained in the subsur魚ce samples。

A留e蝿w麗量鋪量⑪聡

 A〉erage contents of sulfide sul負1r,sulfate

sulfhr,organic carbon and carbonate carbon

in reCent marine SedimentS fヒOm tWO dif琵rent

areas are listed in Table6fbr comparison.

There are clear difi艶rences in the sulfide

sulfヒr contents among the samples fヒom the

10

9

8

7

6

_ 5駅

ゆ.……

き 4≡り

三,ヨ 3

8お慧ヌ

2

1

0

o

ロ  ロ

  嵐     ⑱ .  o  o。 ヂ。3  。 ㊥  8ぐ  o   @㊥ぎ。航。

o。8ぞ・  ⑲⑧㊥ ロロ  ロ

           ⑱o o o e  Q  O@   O O    O   O

o

o

o

ooo

o0

 oO O O 80     ㊥面     o

0   ㊥

 ㊥

㊥Surface sampl e

O Core sample

  0      0。1     0.2     0.3     0.4     0.5     0.6

        0rganiccarbon(%)

Fig.7 Relationship between organic carbon and    w飢er soluble chl6rine.

area to the east of Northeast Japan (o。54%),

around the Japan Trench(o。27%)and in the

Central Pacific (0.00%)。There also exists

similar tendency in the organic carbon

contents.Thus both sulfide sulfhr and,organic

carbon are more abundant in the coastal side

than in the oceanic side。This魚ct implies

that the su1且de sulfUr in the marine sediments

are provide(i by bacterial sulfate reduction

through sedimentary processes involving abun-

dant organic carbon.Absence of sulfide sulfhr

in the Central PaciHc may be related to the

low organic carbon contents,and,in lesser

degree,to〉ery slow rate ofsedimentation and

other bathymetric situations。

Re蛋ere聡ces

BERNER,R.。A.(1970) Sedimentary pyrite formation。

     ∠重ηz。Joz67。S6ぎ。,vol・268,P.1-23。

GoLDBERG,E。D,and ARRHENIus,G。0.S.(1958)     Chemistry ofPacific pelagic sediments。0606肋η.

     Oo5ηzooh伽2・∠16厩,voL13,P,153-212。

GoLDHABER,M.B.,ALLER,:R.C.,CoGHRAN,J.K.,

     R.osENFELD,」。K。,MARTENs,C。S。andBERNER,

     R。A.(1977〉 Sulfate reduction,diffusion,and.

     bioturbation in long island sound sediments:

     :Report of the foam group。オ肱Jo%7.Soゑ.,voL

     277,p。193-237。

JφRGENsEN,B。B。(1977) The sulfur cycle of a coastal

     marine sediment (Limfjorden, Denmark).

     .乙伽zηoJo8フαη4066αηog貰αψ妙,vo1.22,p。814-832.

MITA,N。,NAKAo,S..and KATo,K。(1982)Minor

     chemical composition of bottom sediments

     貸om the Central PaciGc Wake to Tahiti

     transect.1ηMlzuNo,A.and NAKAo,S。(843。),

     σθoJ.S%γ∂。」吻η0励6Rゆ。(inpress)。

MlzuNo,A。and NAKAo,S.(θ45.)(1982)Regionaldata

     of marine geology,geophysics,and manganese

Table6 Comparison ofthe average contents fbr sulfide sulfUrラsulfate sulfur,organic carbon

and carbonate carbon i血recent marine sediments.

垂垂嚢選

灘 麟麟馨

Area Water depth  (m)

Sulfidesulfhr(%)

Sulfate sulfur(%)

Total

         Organic     Carbonate

S孕1t。rigin ca「bon(%)carbon(%)

Sea off ofNortheast Japan*     750-4770

Around Japan Trench*     5180-8805

Central Pacific Basin        2944-5962

0.54

0.27

0.00

0.29

0.18

0.33

0.12

0.11

0.27

1.52

0.90

0.20

0.30

0.04

0.34

どみ

睡黙

*Data from TERAsHIMA8紹」,(in prep。)

一378一

Page 11: Bulletin of the Geological Survey …Bulletin of the Geological Survey ofJapan,voL33(8),P・369-379,1982 543.4:549:54622十546.26 (265) S腿臨餓誠晦幽舳C鯉電錨電s⑪£脱卿一鴎窺S⑪醜鵬齪騒

S%伽απ40励・碗ηD卿一58α36伽鶴(乃郷h伽,蜘肋・姻ハ4伽)

    nodules:the Wake-Tahiti transect in the

    Central Pacific (GH80-l cruise, January-

    March1980)。060」。S麗7∂.」卿η0幡θ鋤よ    (in press)・

SuGIsAKI,:R.and KINosHITA,T,(1982)Major element

    chemistry・fthesedimentsontheCentral    Paci且c transect,Wake to TahitiラGH80-1

    cruise,血MlzuNo,A.and NAKAo,S,(645.),

    08・乙S%7∂。」吻ηα膨Rψ置。(inpress).

TERAsHIMA,S。,NAKへoラS。and MocHlzuKI,T.(1982)

    Sulfhr and carbon contents of manganese

    nodules from the Central Pacific,GH80-1    cru五se. Bz〆ム 060」。 3%7∂. 」ψαη, vol。 33, P.

    111-123.

中央太平洋海底堆積物中の硫黄と炭素含有量

寺島 滋・中尾征三・三田直樹

                    要   旨

 中央太平洋海盆から得られた深海底堆積物115試料について全硫黄,全炭素,有機炭素,水溶性ナト

リウム及び水溶性塩素を定量した.そして硫黄の存在形態と地球化学的性質を知る目的で一部について

は硫酸塩硫黄,バリウムも定量した.用いた分析方法は燃焼一赤外吸収法(全硫黄,全炭素,有機炭素),

原子吸光法(水溶性ナトリウム,バリウム),滴定法(水溶性塩素),重量法(硫酸塩硫黄)である.

 全硫黄の含有量は0.16-0・51%で,平均値は0・33%であった.全硫黄と水溶性ナトリウム,水溶性塩

素,バリウム含有量との関係を検討した結果,全硫黄の約80%は海水中の硫酸イオンに由来し,残りは

主として重晶石として存在すると考えられた.そして,硫化物硫黄は全く検出されなかった.

 有機炭素の含有量は0・07-0・63%であり,平均値は0・20%であった.そして表層堆積物に多く,コァ

ー堆積物で低い傾向があり,大半の有機炭素は海底面で酸化分解されると推定された,全炭素から有機

炭素を差し引くことによって求められた炭酸塩炭素は,115試料のうちわずか14試料(そのほとんどは

表層堆積物)に存在する.

 堆積物の種類との関係では,沸石質堆積物中の全硫黄,水溶性ナトリウム,水溶性塩素の含有量は珪

質軟泥その他の堆積物に比べて低かった.本研究で得られたいくつかのデータを日本海溝周辺海域の試

料についての結果と比較したところ,硫化物硫黄及び有機炭素の含有量に顕著な差があり,この両者は

陸側海域で高く,陸から遠くなるに従って減少する傾向を示した.これは海域の酸化還元環境や堆積速

度,有機物の供給量等に関係すると思われる.

(受付:1982年1月18目1受理:1982年2月22日)

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