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LOW GRADE URANIUM DEPOSITS OF INDIA
Dr. ANJAN CHAKI, DIRECTORAtomic Minerals Directorate for Exploration & Research
Department of Atomic Energy,GOVERNMENT OF INDIA
PREVIEW
• Uranium Provinces of India• Characterisation of Indian uranium deposits• Thrust areas of uranium exploration• Cuddapah uranium province, Southern India• Tummalapalle uranium deposit• Uranium deposits around Rohil, NW India• Uranium deposits of Central India• Other potential areas
� Uranium exploration in India dates back from late forties and the first uranium deposit (vein type) was discovered at Jaduguda in 1951 in the Singhbhum Shear Zone (SSZ) Jharkhand, which has now been proved as an important uranium province with a number of low grade, small to medium size uranium deposits. � Subsequently, number of new uranium deposits were discovered in other parts of the country (Rajasthan, Andhra Pradesh, Karnataka, Chhattisgarh, Meghalaya, etc.)
Uranium Exploration
4
(6)(6)
Distribution of Uranium DepositsSTATE GEOLOGICAL SETUP DEPOSIT TYPE EXAMPLES
Jharkhand Singhbhum Shear Zone(Paleoproterozoic)
Vein Type Jaduguda, Bhatin, Narwapahar, Turamdih
Andhra Pradesh
Cuddapah Basin(Proterozoic)
Unconformity Type
Lambapur, Peddagattu, Chitrial, Koppunuru
Stratabound Type
Tummalapalle-Rachakuntapalle
Rajasthan Aravalli & Delhi Supergroups (Paleo- Mesoproterozoic) Vein Type Umra- Udaisagar &
Rohil- GhateshwarKarnataka Bhima Basin
(Neoproterozoic) Vein Type Gogi, Gulburga districtChhattisgarh Dongargarh Shear Zone &
North Surguja Shear Zone(Paleo- Mesoproterozoic)
Vein Type Bodal, Bhandaritola & Jajawal, Dumhat
Meghalaya Mahadek Basin(Cretaceous) Sandstone
TypeDomiasiat, Wahkyn, Tyrnai, Gomaghat, Lostoin, Phlangdiloin
DEPOSITTYPE
LOW GRADEDEPOSITS
GEOLOGY HOST ROCK MINERALOGY
Vein
Jaduguda and Surroundings
SSZ in Singhbhum Group of rocks
Quartz chlorite schist (granular)
Uraninite, Brannerite
Bodal and Bhandaritola Nandgaon Group Amphybolite &
Quartz porphyryUraninite, Pitch-blende, Coffinite
Jajawal-Dumhat
Quartzo-feldspathic rock of North Surguja Shear Zone - Do-
Rohil Delhi Supergroup Albitites Pitchblende, Uraninite, CoffiniteUmra Aravalli
Supergroup Carbon phyllite
Strata-bound Tummalapalle Chitravati Group Dolostone Pitchblende,
Coffinite
Uncon-formity
Lambapur, Peddagattu and Chitrial
Srisailam Quartzite (Cuddapah Supgr.)
Unconformity of Granite & Srisailam quartzite
Uraninite, Pitch-blende, Kasolite
Koppunuru Palnad sub-basin (Kurnool Group)
Granite & Bangana-palle quartzite
Uraninite, Pitchblende
Sandstone Domiasiat-Wahkyn, etc
Lower Mahadek Formation
Feldspathic sandstone
Pitchblende, Coffinite
Characterisation of Uranium deposits
Thrust Areas for Low Grade Uranium Exploration in India(A) Paleoproterozoic Singhbhum Shear Zone, Jharkhand(B) Meso- Neoproterozoic Cuddapah and Kurnool
Basins, Andhra Pradesh(C) Proterozoic Aravalli and Delhi Basins, Rajasthan(D) Paleoproterozoic Dongargarh and North Surguja
Shear Zone, Chhattisgarh(E) Neoproterozoic Bhima and Kaladgi Basins, Karnataka(F) Paleoproterozoic Dharwar (QPC), Karnataka(G) Cretaceous Sedimentary Basin, Meghalaya(H) Meso- Neoproterozoic Chhattisgarh and Indravati
Basins, Chhattisgarh
Cuddapah Basin, Andhra Pradesh� Crescent shaped Paleo to Neoproterozoic Cuddapah and Kurnool basins are spread over 44,500 km2 area.� The Cuddapah Basin has evolved through a series of tectonic & thermal events and the formation of sub-basins viz. Papaghani / Chitravati, Nallamalai, Srisailam, Kurnool and Palnad with major overlap. � The basement Archean gneisses / Dharwar meta-sedimentaries are thrusted over Cuddapah Supergroup rocks on the eastern margin of the basin while the basin has an unconformable contact with the basement crystalline rocks in the west. � Two main types of uranium deposits have been identified in the Cuddapah basin. These are unconformity related and stratabound type.
�Total Area 44,500 sq km
�Thickness of the sediments ~ 12 Km
�Known unconformity related U-deposits(Northern Cuddapah)
�Known stratabound carbonate hosted U-deposits (Southern Cuddapah)
�Known fracture controlled granite hosted U-deposits
GEOLOGICAL MAP OF CUDDAPAH BASIN SHOWING URANIUM DEPOSITS AND OCCURENCES
9
PeddagattuChitrial
R.V. Tanda
Unconformity-related deposits (Northern Cuddapah)� Evaluation and exploratory drilling at Lambapur,
Peddagattu and Chitrial explored unconformity between the Basement Granitoids and the overlying Srisailam quartzite (Srisailam sub- basin) and medium tonnage, low grade deposits have been established. � A small, low grade deposit has also been
established around Koppunuru at the unconformity between Basement Granitoids and overlying quartzite of Banganapalle Formation (Palnad sub-basin) of Kurnool Group.� Surveys indicated uranium occurrences in
Basement Granitoids and overlying Banganapalle Formation (Palnad sub- basin) around Rallavagu Tanda, Damarcherla and Mathampalle.
Geological map of northern part of Cuddapah Basin
12
URANIUM MINERALISATION IN VEMPALLE FORMATION
1900m Thick
Cherty Limestone
Purple ShaleUraniferous DolostoneConglomeratesMassive Limestones
KURNOOLSCUMBUM SHALEBAIRENKONDA QURTZITEBASIC SILL/FLOWSGANDIKOTA QUARTZITETADPATRI SHALEPULIVENDLA QUARTZITEVEMPALLE FORMATIONGULCHERUVU QUARTZITEGNEISSES/DHARWARSU-MINERALIZATION IN VEMPALLE LIMESTONEU-MINERALIZATION IN QUARTZITEU-MINERALIZATION IN FRACTURE/FAULT ZONE IN GRANITE BASMENT
GEOLOGICAL MAP OF PARTS OF CUDDAPAH BASIN SHOWING URANIUM OCCURRENCES
14°
78° 00' 78° 30' 79° 00'20 Km 10 0 20 Km
78° 00' 78° 30'
MULAPALLE
KADAPA
MADDIMADUGU
PRODDATUR
GANDIKOTA
TADPATRIREDDIPALLE
AMBAKAPALLE
PARNAPALLE
RAYACHOTI
KADIRI
14°
14°
15°
30'14°30'
15°00'00'
00'00'
TUMMALAPALLE
GANDI-MADYALABODUGIDDANKIPALLE
KANAMPALLE
79° 00'
KORIVIPALLE
VEMPALLE
PULIVENDULA
29 km
4 6 k m
5 4 k m
32 km
BADVEL
KASTURIGATTU
Tummalapalle & extension areas
Stratabound Uranium Deposit (Southern Cuddapah)� Dolostone hosted stratabound uranium deposit at Tummallapalle in the southern part of Cuddapah basin was established in the early nineties. �As a consequence of the development of an innovative pressure alkali route beneficiation process and prevailing high uranium cost turned the deposit economical. � Exploration work has been intensified in extension areas of Tummalapalle in 30 km belt (10 blocks), out of 160 km potential uranium occurrences in Vempalle Formation along southwestern margin of Cuddapah Basin.� A low grade, large size deposit has already been proved in Tummalapalle-Rachakuntapalle (3 blocks).
15
STRATIGRAPHIC SUCCESSION – TUMMALAPALLE AREA(Paleo- Mesoproterozoic)
Pulivendla QuartziteDisconformity Basic Sills/DykesStromatolitic Cherty LimestonePurple Shale
Vempalle Formation DolostoneDolostone-- UraniferousUraniferousIntraformational ConglomerateMassive LimestonePurple Shale
Gulcheru Formation Quarztite & Conglomerate Unconformity Basement Granite Gneiss
Uraniferous Dolostone
Intraformational Conglomerate
StromatoliticCherty Limestone
Purple Shale
Massive Limestone
PAPA
GHA
NI G
ROUP
Disequilibrium in favour of uranium1. Based on Chemical Value : 19%2. Based on β/ γ value : 34%
16
Out of 160 km U-Occurrence10 blocks identified in 30 km
Low grade, Large size deposit has alreadybeen proved in Tummalapalle-Rachakuntapalle
365 samples
70% Recovery by pressure alkali route
Homogeneous nature of ore body in strike as well as dip wise
18
Mode• Thin stringers of pitchblende within phosphatic dolomitic groundmass
• Thin fracture filled veins within quartz clasts
• Intergranular fillings within collophane rich portion
• Inclusions in quartz clasts
Loci• Carbonate-phosphate contact• Sutured boundary of microstylolites• Layer of stromatolite• Grain boundary of quartz clasts•Within cavities filled with fibrous dolomite and framboidal pyrite
URANIUM MINERALISATION IN VEMPALLE DOLOSTONE
Vein-like pitchblende (P) in phosphate, calcitic dolostone from Tummalapalle.
U-Ti complex (U-Ti) within a clast of quartz in mineralized phosphatic, siliceous, calcitic dolostone.
Ovoid grain showing intimate association of pitchblende (P) and pyrite (Py) in phosphatic siliceous calcitic dolostone
19
Nature of host rockNature of host rock Impure, siliceous, phosphatic, dolomitic, stromatolitic Limestone
Uranium MineralsUranium Minerals Pitchblende , Coffinite, U-Ti complex, CollophaneAssociated mineralsAssociated minerals Pyrite, Chalcopyrite, Molybdenite, Bornite, Digenite,
CovelliteGangue MineralsGangue Minerals Dolomite, Quartz, MicroclineGradeGrade 0.040 to 0.046% eU3O8
Trace ElementsTrace ElementsThe average concentration of molybdenum, nickel, copper, cobalt, barium in hangwall lode is 230, 30, 90, 25 and 215 ppm (n=250) respectively and in footwall lode are 44, 42, 55, 10 and 289ppm (n=150). Average P2O5values are 2.46% in HW and 2.60% in FW.
Controls of Controls of mineralisationmineralisation
Phosphate, silica and organic matter in the impure dolomitic limestone are the main controlling factors for uranium mineralisation
CHARACTERISTICS OF URANIFEROUS VEMPALLE DOLOSTONE
RECOVERY / LEACHABILITY OF TUMMALAPALLE ORE
� Exhaustive experiments on leachability (alkali route) indicated recovery 65-70%, using NaCO3 & NaHCO3 as the leachants and KMnO4 as the oxidant.� To increase uranium concentration in leach liquor number of multicycle leaching experiments were carried out by Cross Current Leaching, followed by Filtration and Counter Current Washing (CCLFCCW).�Experiments enhanced uranium concentration in leach liquor (1.5-1.8 g/L) with significant reduction in consumption of leachants, but the cost intensive oxidant (KMnO4) could not be reduced.
� Studies indicated suitable alternative cost-effective oxidants in lieu of KMnO4 are industrial oxygen or Air. � Precipitation of uranium as sodium di-uranate from the leach liquor obtained by CCLFCCW, showed that it is possible to quantitatively precipitate (>95%) out the uranium values with a high grade (82% U3O8) and purity. � Pilot scale test work on the process flow sheet evolved at Technology Demonstration Pilot-plant, Jaduguda. Results indicate achieving about 75% leachability following alkaline pressure leaching.
SCHEMATIC FLOWSHEET FOR PROCESSING OF TUMMALAPALLE ORERUN-OFF MINE ORE
SIZE REDUCTION
DEWATERING & REPULPING
PRESSURE LEACHING FOLLOWED BY FILTRATION AND COUNTER
CURRENT WASHING
YELLOW CAKE PRECIPITATION
SOLID-LIQUID SEPARATION (THICKENING + FILTRATION)
DRYING & PACKING
YELLOW CAKE
EVAPORATION
Steam
Tailings (for Disposal)
LeachantsNa2CO3 & NaHCO3
Oxidant, Industrial O2
Aravalli and Delhi Basins, Rajasthan� Paleo- Mesoproterozoic Aravalli and Delhi Group of metasediments of Rajasthan and neighbouring areas holds potential as several shear zones with anomalous uranium have been identified. Important are Umra near Udaipur and Rohil close to Jaipur. � Uranium mineralisation at Umra is associated with dolomitic limestone, carbonaceous phyllite and a dark metasedimentary assemblage ( Aravalli Supergroup) �Uranium mineralisation at Rohil in the North Delhi Fold Belt is associated with albitites (320 km long zone of albitite-microclinite-pyroxinite, also referred to as “albitite line”) with carbonaceous phyllite and mica schist of Delhi Supergroup.
V VVV V
V VV
V VVV
VV VVV
V V V VVV
V V V VV
VVV
VV
V VVV
V
Vrrrr
r rr rrrr
J J J JJ J J J
J JJ J
J JJ
J J J JJJJJ JJ J J
JJJ J
J
J JJJ
J
J JJ J
J J J
JJ J
J
J
J J
aaaa
J
a
VaJ
V
Barmer
JaisalmerBadhaura
Jodhpur
Pali
Jalor
Nagaur
Jhunjhunu
Sikar
Ladi-ka-basKalatopri
JAIPUR
Alwar
BharatpurDiara
Rohil - Ghateshwar
Kushlawali DhaniPanchlangi
KerpuraKaroth Ki Dhanian
Mewaragujarwas
Siswali
Dhanota
SiorKanthiAntri
Goga TempleBadhaura
Swai Madhopur
Kunchalwara
Devpura
BundiBhilwara
KherpuraPutholi
ChitorgarhJhalawar
UdaisagarUmra
PrasadPalanpur
Dungapur
Banswara
Kota
KalamagraUdaipur
Haldughati
Kharbar
Durgapura
0 50 100 km
24°00'
26°00'
28°00'
26°00'
28°00'
Hy derabad
GEOLOGICAL MAP OF PART OF RAJASTHAN SHOWING URANIUM OCCURRENCES
r r
24°00'
70° 00' 72° 00' 74° 00'76° 00'
78° 00'
72° 00'
74° 00'76° 00'
AlluviumSandstone & Conglomerate/LateriteDeccan TrapAbur BedsJurassic FormationsBap BedsVindhyan SupergroupMalani RhyoliteErinpura GraniteDelhi SupergroupRaialo SeriesAravalli Supergroup/Basic & Ultrabasic RocksGranite/Nepheline SyeniteBanded Gneissic Complex (BGC)Uranium Occurrence
Umra
Rohil-Ghateshwar
24
492.15m
488.80m
485.10m
483.45m
483.40
RL-484.30m
RL-492.75m
RL-490.30m
RL-490.55m
R L-490.50m
GEOLOGICAL MAP SHOWING BOREHOLE'S LOCATION OF GHATESHWAR - ROHIL AREA DISTT. SIKAR ( RAJASTHAN) TOPOSHEET NO. 45M/6
GTR-66
GTR-72
GTR-75
GTR-58
RHL-15
RHL-26
RHL-21
RHL-20
RHL-13A
39ARHL-17
RHL-24&27
Scale
GEOLOGICAL MAP SHOWING BOREHOLES LOCATION OF ROHIL AREA ( CENTRAL BLOCK ) DISTT. SIKAR , RAJASTHAN TOPOSHE ET NO. 45M/6
100m 50m 0m 100m
GTR -69GTR -35GTR-82495.06m
487.08m
486.20m
486.60m
487.00m
GTR-83
GTR-57
GTR-87
486.00m
GTR-56
485.70m
GTR-53
487.10m
487.95m
GTR-50
GTR-42A
488.60m 486.80m
GTR -61
GTR -36
489.00m
509.50m
RHL-36
493.08m
493.70m
494.05m
GTR-76
GTR-74
GTR-77
494.82m
GTR-79
494.80m
494.65m
GTR -73
GTR -78
492.35m
GTR-32
GTR -71
493.70m
492.30m
RHL-31
495.30m
GTR-81
485.80m
RHL-35
488.40m
GTR-67
487.40m
GTR -21
487.40m
GTR -12
486.90m
GTR-18
487.00m
492.50m
GTR-25
488.15m
GTR -65
GTR-26ARHL-33 489.00m
492m
RHL-30
490.20
RHL-28
487.50m
GTR -40
490.20
484.20m
484.30m
484.00m
GTR-22
GTR-55&62
486.70m
485.60m
GTR-14
GTR-19
484.76m
484.80m
GTR-11
GTR -37&47
486.20m
GTR-39
485.00m
486.60m
RHL-16
483.60m
491.70m
GTR-68
GTR -28
484.20m
GTR -32
486.28m
GTR-7
GTR -10
RL-489.00m
RL-489.10m
GTR-30
GTR-5
483.30m
GTR-59
GTR-38483.25m
RHL-14
483.60
RL-485.40m
GTR-34
GTR-63
RL-485.30m
RL-488.90m
RL-490.10m
RL-489.80m
GTR-33
RL-488.50m
RL-491.44m
GTR -8
GTR -24
GTR -45&51(60 ° )
GTR-46(Ab)
GTR-48
GTR-70RHL-1
RHL-11RHL-9
R L-490.87m
RL-490.7 5m
491.30m
GTR-49
GTR-44
RL-491.00m
R L-490.9 0m
GTR-41
RL-491.00m
491.0 0mGTR-16
GTR-54
R L-490.70m
RHL-4,4A(Ab)
490.7 0m
491.3 0m
RL-491 .30m
R L-491.00m
R L-491.2 5mRHL-5
RHL-2
RL-491.56m
RL-491.55m
GTR-23
R L-491.1 3m
RHL-8
RHL-10
RHL-6
RL-491.20m
RL-491 .40m
GTR-64RL-491.7 0m
R L-492.0 0m
RHL-3
492.20mRHL-7
GTR-27491.30m
RHL-12
GTR-60
RL-492.9 0m
GTR-29
100m 50m 0mScale
100m
RL-493.5 0mGTR-31
492.50m
490.05m
RHL-41
RHL-25
491.80mRHL-37
491.20
489.35m
RHL-18
RHL-39491m
491.25m
GTR-86
485.30m
RHL-42
487.10m
485.00m
RHL-38
RHL-19486.82mRHL-44
482.50m
RHL-34
482.70m
RL-485.70m
RHL-43482.45m
RHL-22
RHL-40
RHL-234 8 2 . 4 5
RHL-29
RL-488 .60m
RL-488 .36m
487.8 5m
GTR-88
GTR-80
GTR-84R L-487.5 5mGTR-85
486.42mGTR-89
R L-485.7 0m
GTR-90
INDEXSOIL COVER
KAOLINISED/PU LVERISED Z ONE
QUARTZ & AMPHIBOLE QUARTZ ITE AT PLACES/a:GRA PHITIC QUARTZ ITEPREVIOUS BOREHOLE D RILLED (AMD/BH, GH/BH SERIES)
PRESENT GTR/RHL SERIES OF BOREHOLES(COMPLETED /IN PROGRESS/PROPOSED)SURFACE ANOMALY
SHEAR Z ONE/FAULT
SURVEY STATION
CONDUCTOR AXIS
I.P. ANOMALOU S Z ONE
KZ PZ
3 3a
N
N
CENTRAL BLOCK
NORTH BLOCK
SOUTH BLOCK
N
100 N
200 N
300 N
400 N
500 N
600 N
700 N
800 N
900 N
1000 N
1100 N
1200 N
0 0
-100 N
-200 N
-300 N
-400 N
-500 N
-600 N
-700 N
-800 N
-900 N
-800 N
-700 N
-300 N
-600 N
-500 N
-400 N
-200 N
-100 N
1300 N
1400 N
1500 N
1600 N
1700 N
1800 N
1900 N
2000 N
2100 N
2200 N
2300 N
2400 N
2500 N
2600 N
2700 N
2800 N
2900 N
3000 N
3100 N
3200 N
3300 N
3400 N
2200 N
2000 N
2100 N
2400 N
2300 N
2500 N
2600 N
2700 N
2800 N
2900 N
3000 N
3100 N
3200 N
3300 N
3500 N
3400 N
1200 N
1300 N
1400 N
1500 N
1600 N
1700 N
1800 N
1900 N
-900 N
0 0
100 N
200 N
300 N
400 N
500 N
600 N
700 N
900 N
800 N
1000 N
1100 N
0
-500E -400 E
-300 E
-200E
100 E
200 E
300 E
400 E
500 E
600E
200 E
100 E
300 E
400 E 500
E
600E0
0 700E
800E
-100
E 00 10
0 E
200
E
300
E
500 E 60
0E
700E
800E
400 E 90
0E
1000
E
1100
E
1200
E
1300
E
1400
E
1500
E
1600
E
NORT
HING
(Y)
EASTING (X)
GTR-94R L-488.80m
GTR-93RL-495.60m
ST- 5
ST-8
RHL-47A496.85m
GTR-6
GTR-3
GTR-2A
>R-52
GTR-1
3500 N
3600 N
3700 N
3800 N
3900 N
4000 N
4100 N
4200 N
4300 N
3600 N
3700 N
3800 N
3900 N
4000 N
4100 N
4200 N
4300 N
R O H I L
N- 1
00-N
0-S1
N- 2
N- 3
N- 4
N- 5
N-6
N- 7
N- 8
N- 9
N- 10
N- 11
N-13
N-15
N-20
N-25
N-30
N-35
N-43
RNE-1
GTR-97
GTR-95
R L-487.02m
GTR-92&96R L-488.88m
RL-489.06mGTR-98
RL-489 .08m
P-20
I.P. ANOMALOUS ZONE
CONDUCTOR AXIS
SURVEY STATION
3
KZ
3a
PZ
SHEAR ZONE/FAULT
SURFACE ANOMALY
KAOLINISED/PULV ERISED ZONE
SOIL COVER
INDEX
QUARTZ & AMPHIBOLE QUARTZ ITE AT PLACES/a :GRAPHITIC QUARTZITEPREVIOUS BOREHOLE DRILLED (AMD/BH, GH/BH SERIES)
PRESENT GTR/RHL SERIES OF BOREHOLES(COMPLETED /IN PROGRESS/PROPOSED)
N-40
R G camp Khandela
GEOLO GICAL MAP SHOWING BOREHOLES LOCATION OF ROHIL AREA ( SOUTH BLOCK ) DISTT. SIKAR , RAJASTHAN TOPOS HEET NO. 4 5M /6
SOIL COVER
KAOL INI SED/PULVER ISED ZONE
QUARTZ & AMPHIBOLE QUARTZ ITE AT PLACES/a :GRAPH ITIC QUARTZITEPREV IOUS BOREHOLE DRILLED (AMD /BH, GH /BH SERIES)
PRESENT GTR/RHL SER IES OF BOREHOLES(COMPLETED /I N PROGRESS /PROPOSED)
SURFACE ANOMALY
SHEAR ZONE /FAULT
SURVEY STAT ION
CONDUCTOR AXI S
I .P. ANOMALOUS ZONE
KZ PZ
3 3a
INDEX
RNE-3RL-491 .77m
GTR-99R L-497.78m
RNE-2
RNE-4
GTR-103
GTR-104
493.54m
GTR -100
GTR-101
GTR-105
GTR -102
GTR -106
GTR -108
GTR-107
R L-481.8 3m
RNE-10
GTR-110492.76m
GTR-111
GTR-112501.87m
501.05m
497.67m
RNE-9
RNE-11R L-489 .35m
RL-486.52m
RNE-12R L-488.50m
RNE-13RL-491.4 2m
RNE-14
R L-481.82mRNE-15
RL-483.5 9mRNE-16
R L-484.5 4mRNE-18
GTR-109 & 114R L-489 .34m
489 .86m
RL-486 .20mRNE-20
R L-484.7 2mRNE-24
RL-485 .04mRNE-22
GTR-113&113A
RNE-17&19RL-495.9 6m
RNE-21&23RL-495 .96m
RNE-25 & 27RL-495 .96m
RNE-5
RNE-8
RNE-7
GTR- 116
RNE-26RL-485 .61m
GTR -115492.06m
RNE-28RL-490 .91m
RNE/30
RNE/29RNE/31
RNE/32RNE/32A
GTR -117
494.33m
GTR-118493.29m
GTR-119
491.25m
488.28m
488.22m
GTR -120
GTR-121
North Extension Block
North Block
Central Block1km x 1km
South Block
Ghateshwar Block
Rohil Exploration
BlocksKhandela Block 1km East
Kerpura 8km
Khatundra-Goria 4kmJhumpa-Jajod 8km
Rohil Central BlockSignificant U-Mineralisation intercepted in BH. GTR/134
26
RHL-15
RHL-26
RHL-21
RHL-20
RHL-13A
RHL-39ARHL-17
RHL-24&27
Scale
GEOLOGICAL MAP SHOWING BOREHOLES LOCATION OF ROHIL AREA ( CENTRAL BLOCK ) DISTT. SIKAR , RAJASTHAN TOPOSHEET NO. 45M/6
100m 50m 100m0m
GTR-76
RHL-36
GTR-73
GTR-79 GTR-74
GTR-78
RHL-32
GTR-71 RHL-31
200m
GTR-21
RHL-35GTR-12
GTR-18
GTR-25
GTR-26A
GTR-65
RHL-33
RHL-28
RHL-30
GTR-40
GTR-14
GTR-55&62
GTR-22
GTR-19
GTR-37&47
GTR-11
GTR-39 RHL-16
GTR-68
GTR-28
GTR-32
GTR-10
GTR-7
GTR-30
GTR-5
GTR-59
GTR-38 RHL-14
GTR-34
GTR-63
GTR-33
GTR-8
GTR-45&51
GTR-46(Ab)
RHL-41
RHL-25
RHL-37
RHL-39
RHL-18
GTR-86
RHL-42RHL-38
RHL-19
RHL-34
RHL-44
RHL-43RHL-22
RHL-40
RHL-23
RHL-29
INDEXSOIL COVER
QUARTZITE
SHEAR ZONE/FAULT
CONDUCTOR AXIS
CENTRAL BLOCK
N
100 N
200 N
300 N
400 N
500 N
600 N
800 N
700 N
1000 N
900 N
0
100 S 100 S
0
100 N
200 N
300 N
400 N
500 N
600 N
700 N
900 N
1000 N
800 N
300
W
1100 N
400
W
200W
200 E10
0 E
300 E
500 E
600E
00
100
W
700E
800E
NORT
HING
(Y)
EASTING (X)
RHL 47A
R O H I L
N- 10-N00-S1
N- 2
N- 3
N- 4
N- 5
N-6
N- 7
N- 8
N- 9
N- 10
GTR-48N- 11
GTR-81
GTR-58
RHL-46
GTR-24
GTR-43ARHL-45
E-1
E-1
Samadhi
School
Projected U-Lodes
GTR-100
GTR-102
GTR-106GTR-108
GTR-117
GTR-120
GTR-116
GTR-112
GRANITE
RHL-49
RHL-48
GTR-126
A1A
B
B1
B2
B3B4
A
BB1
GTR-134GTR-143
RHL-49A
RHL-50
GTR-146
RHL-52RHL-51
Borehole Location Plan, Rohil Central Block
Dongargarh and N. Surguja Shear Zone, Chhattisgarh�Uranium exploration in Kotri-Dongarhgarh belt located uranium mineralisation at Bodal, Bhandaritola, Baghnadi, Jangalpur, etc. associated with amphibolite (Pitepani), metarhyolite (Bijli) and Dongarhgarh granite of Nandgaon Group (Paleoproterozoic).� Uranium mineralisation at Mogrra, Malharbodi, Nalpani, Udarichhapar, etc. is associated with Bortalao sandstone and conglomerate of Khairagarh Group (Mesoproterozoic). �Low grade, small size uranium reserves have been proved at Mogrra, Maharashtra and Bodal-Bhandaritola, Chhattisgarh.� Uranium mineralisation as vein, lenses and shoots of variable size & shape confined in the quartzo- feldspathic rocks of North Surguja Shear Zone at Jajawal-Dumhat, Chhattisgarh.
•12
•5
4
•8•7
•11
•9
•14•
16
•15
•18
10
17
•19
•21
•22
•24
•23
•25•20 •27
•28
•30•29
•32
•38
•31
•37
•34•35
•39
•40
•33•36
ALLUVIUM
LATERITE
DECCAN TRAP
INFRATRAPPEAN/LAMETA
GONDWANA
VINDHYAN SUPERGROUPCHHATTISGARH/INDRAVATI SUPERGROUP
PAKHAL/ABUJHMAR/KHAIRAGARH
DONGARGARH GRANITENANDGAON/SONAKHAN GROUP
BIJAWAR GROUP
BUNDELKHAND GRANITE
SAKOLI
UNCLASSIFIED GRANITE
•3
SAUSAR/CHILPI
�
�
�
��
�
�
�
�
�
�SagarJhabua
NasikAurangabad
Ratnagiri
Khandwa
Kolhapur
Nanded
84º82º76º 80º74º 78º
22º
24º
16º
18º
20º
050 50 km
GEOLOGICAL MAP OF MADHYA PRADESH, MAHARASHTRA AND CHHATTISGARH
Jagdalpur
Rewa Sidhi
RaipurT a p ti L i n e a me n t
Nagpur
•13•
�
Ambikapur•26• 12
1. BODAL 2. BHANDARITOLA 4. MOGARRA 7. JAJAWAL 8. DHABI 9. DUMHAT
�
•41
•Na r ma d a – S o n L i n e a me n t
•
�
· Uranium occurrences / deposit
•
•
•42
6
D EP O
S I TS
Other potential areas
�Mesoproterozoic Gwalior Basin, Madhya Pradesh, Kunjar Basin, Orissa, and Shillong Basin, Meghalaya.� Proterozoic Bijawar-Mahakoshal-Vindhyan Basins.� Paleoproterozoic Quartz Pebble Conglomerates (QPC) of Sundargarh and Jajpur districts of Orissa. � Mesozoic Satpura Gondwana, Madhya Pradesh� Cenozoic Siwalik Basin, Lesser Himalaya.�South Purulia Shear Zone (SPSZ) exposing alkaline carbonatite complex within tuffaceous phyllite of Singhbhum Group, Eastern India.
CONCLUSION
�Indian uranium deposits are of low grade except Gogi, Karnataka.� Vempalli Formation (160 km), in SW margin of Cuddapah Basin has very large potential for Stratabound (dolostone) type low grade uranium deposit.� Delhi Supergroup (North Delhi Fold Belt) holds large promise for low grade uranium deposit associated with albitites. � Low grade large size deposits may be made economically viable by new technology in mining and milling processes.�There are many geological settings, which have ample potential for uranium deposits.