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Energy and Groundwater in Montana
Summary of Montana’s Geothermal Areas
John Metesh
Montana Bureau of Mines and Geology
July 31, 2012
Deep Sedimentary Rocks
Crystalline Rocks
Deep Valley Fill
Yellowstone KGRA
Sedimentary
Flat lying (somewhat)
Tertiary through Mesozoic
and Paleozoic
Coal, oil, gas,
geothermal?
Sedimentary (origins)
Rocky Mountain thrust belt
uplift followed by extension
(thrust faults become normal)
intrusives
Coal, oil, gas (minor)
Base metals, Au, Ag
geothermal?
268 warm springs and wells
77% have temperatures less than 40O Celsius
12% have temperatures greater than 50O Celsius
111o
0
10
20
30
40
50
60
70
DISTRIBUTION OF SITESEAST OF 111 DEGREES LONGITUDE
Number of Sites = 115
Temperature Range (degrees Celsius)
<10 10 to 20 20 to 30 30 to 40 40 to 50 >50
0
10
20
30
40
50
60
70
DISTRIBUTION OF SITESWEST OF 111 DEGREES LONGITUDE
Number of Sites = 153
Temperature Range (degrees Celsius)
<10 10 to 20 20 to 30 30 to 40 40 to 50 >50
Distribution by temperature - statewide
(42%) 10 to 20 OC (29%) 20 to 30 OC
(6%) 30 to 40 OC
(11%) 40 to 50 OC
(12%) > 50 OC
Northeast and
eastern Montana (carbonate rocks)
Depth: 2500+m
Madison Limestone – oil/gas wells
90 to 104oC,
flow: 10,000’s Lpm
Saline (TDS = 35,000 to 260,000 mg/L)
West Central Montana (crystalline rocks)
Depth: 2,000m
103oC Marysville
Water quality: TDS=600 mg/L
Flow: 100’s Lpm
0 25 50 75 100Temperature, °C
2000
1750
1500
1250
1000
750
500
250
0
De
pth
, m
ete
rs
BackgroundGradient
Marysville MGE #1 well
southwest Montana (crystalline rock, deep valley fill)
Depth: ? (fault controlled springs)
20 to 80+oC
Spring flow rates: 100’s Lpm
Water quality: TDS = 100’s mg/L
Southcentral Montana (crystalline rock, deep valley fill)
Depth: ? (fault controlled springs)
80+oC
Spring flow rates 100’s Lpm
TDS = 100 to 500 mg/L
Heat Flow (mW/m2)
187 White Earth (east of Helena)
800 Ennis
500 Marysville
Butte
40,000 YNP
Geothermal Gradient (oC/Km and oF/100ft )
72-231 5-13.6 White Earth
400 23 Ennis
240 14 Marysville
32+ 3.0+ Butte
400+ 23.0+ YNP
22.1 0.7 “background”
Yellowstone Controlled Ground Water Area
Montana
Inventoried 400 springs
600 wells
Yellowstone Controlled Ground Water Area
Long-term monitoring (flow/level, chemistry)
5 cold springs
15 hot (>15oC) springs
5 cold wells
10 hot (>15oC) wells
Long-term Program DNRC administration review / issuance of new permits water-use meters MBMG database new well logs water-use monitoring data from YNP Well and Spring Monitoring Special investigations e.g. CUT well abandonment
Butte Historic Mining District
5,600 miles of workings
49 miles of shafts
7 square miles
From: Miller, 1973
Cu exchange with Fe
Production 1880 through 2000
Cu 22,799,000,000 pounds
Zn 4,909,202,540
Mn 3,702,787,341
Pb 854,797,405
Mo 326,671,890
Ag 725,486,448 ounces
Au 2,922,446 ounces
Production 1880 through 2000
$48 billion (2003 dollars)
~half was from copper production
Copper production from the“Richest Hill on Earth”
by method
December 1983 (4320’ amsl)
April 1982 (2140’ amsl)
December 2003 (5252’ amls)
~2,200 feet in 20 months
~930 feet in 20 years
~3100 feet in 30 years (5285 amsl, April 2012)
bottom of pit
Kelley shaft
Orphan Boy
0 0.5 1 mile
SCALE
Kelley
Berkeley
Pit
Ophir
Pittsmontair shaft
Pittsmont #4
Pittsmont #3
OrphanGirl
Anselmo
Travona
Emma
Ophir
Original
Steward
Marget Ann
BelmontPittsmont #1
Mine Shaft (boldwhere sampled)
Lexington GraniteMountain
PilotButte
Missoula
SyndicatePit
Mountain Con
Horseshoe
Bend
LEGEND
NNNNNN
INTERMEDIATE ZONE
PERIPHERAL ZONE
“BARREN” ZONE High Ore
Connection betweenmines (dashed where
bulkheaded)
?
Pittsmont #2
Badger
CENTRAL ZONE
After Sales, 1914
12.82 3.29.07
11.9 3.23.95
32.75 6.22.07 22.14
5.02.07 17.65 5.02.07
26.74 6.22.07
17.4 3.23.00
15.0 4.05.90
Temperature C date
Montana
Tech
(after Miller, 1973)
Diamond drill holes
There’s plenty more where that came from…
State Geological Survey Contributions to the NGDS
$401,000 over 3 years
24 | Geothermal Technologies Program eere.energy.gov
National Geothermal Data System
(NGDS)
The NGDS is a distributed network of repositories and
data sites mitigating the upfront risk of geothermal
energy development by employing state-of-the-art
information science to provide access to quality and
comprehensive data.
What is the NGDS?
State Funding Amount
Washington $1,249,146
Nevada $1,070,639
Utah $966,834
Oregon $958,847
Idaho $873,562
Texas $743,481
Colorado $617,021
New Mexico $605,483
Kentucky $585,977
Massachusetts $515,901
Illinois $507,809
Hawaii $499,951
Montana $401,009
Indiana $378,499
Wisconsin $329,135
Top 15 Funded States
*AZ & CA data collection is part of the AZGS award and is not included in this summary
26 | Geothermal Technologies Program eere.energy.gov
NGDS Architecture: An Integrated, Distributed Data Network
Fluid, heat and permeability all occur naturally in the
geyser and the hydrothermal well below.
Arizona Geological Survey
Kentucky Geological Survey (UK)
Nevada Bureau of Mines & Geology (UNR)
DOE Geothermal Data Repository, Boise State University (BSU)
Illinois State Geological Survey (UIUC)
U.S. Geological Survey
Southern Methodist University (SMU)
State Geological Survey Hub National & Other Geothermal Hub
Interactive map tool provides information on data deliverables by state and category YR 1 Data Compilation
no-cost extension from the U.S.
Department of Energy through
April of 2014
Gunderson, J. A., 2011, Preliminary geothermal map of Montana
using bottom-hole temperature data, Montana Bureau of Mines
and Geology: Open-File Report 608.
Gunderson, J. A., 2011, Preliminary geothermal map of Montana
using bottom-hole temperature data, Montana Bureau of Mines
and Geology: Open-File Report 608.
Analytical Integration
Fluid, heat and permeability all occur naturally in the geyser and the hydrothermal well
below.