Preliminary geologic map of the Hailey 7 1/2-minute quadrangle, Idaho

Batchelder, John N.; Hall, Wayne E.

doi:10.3133/ofr78546

Cited by 5 publications

(5 citation statements)

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“…Recent mapping projects (Rember and Bennett, 1979;Batchelder and Hall, 1978) within the area confirm the existence of widespread faulting in these formations.…”

Section: General Structurementioning

confidence: 83%

Water information bulletin No. 30, part 13: geothermal investigations in Idaho. Preliminary geologic reconnaissance of the geothermal occurrences of the Wood River Drainage Area

Anderson¹,

Bideganeta²,

Mitchell³

1985

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v i i The investigations of the Wood River area reported herein were done by the Idaho Department of Water Resources Geothermal Section for the purpose of evaluating the geothermal potential of the area. Pre-Tertiary sediments of the Milligen and Wood River Formations consisting primarily of argillite, quartzite, shale and dolomite are, for the most part, exposed throughout the area and are cut locally by outliers of the Idaho Batholith. At some locations, Tertiary-age Challis Volcanics overlay these formations. Structurally the area is complex with major folding and faulting visible in many exposures. Many of the stream drainages appear to be fault controlled. Hydrologic studies indicate hot spring occurrences are related to major structural trends, as rock permeabilities are generally low. Geochemical studies using stable isotopes of hydrogen and oxygen indicate the thermal water in the Wood River region to be depleted by about 10 O/oo in D and by 1 to 2 O/oo in 180 relative to cold water. This suggests the water could be meteoric water that fell during the late Pleistocene. The geologic data, as well as the chemical data, indicate the geothermal waters are heated at depth, and subsequently migrate along permeable structural zones. In almost all cases the chemical data suggest slightly different thermal histories and recharge areas f o r t h e water issuing from the hot springs. Sustained use of the thermal water at any of the identified springs is probably limited to flow rates approximating the existing spring discharge.

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“…Recent mapping projects (Rember and Bennett, 1979;Batchelder and Hall, 1978) within the area confirm the existence of widespread faulting in these formations.…”

Section: General Structurementioning

confidence: 83%

Water information bulletin No. 30, part 13: geothermal investigations in Idaho. Preliminary geologic reconnaissance of the geothermal occurrences of the Wood River Drainage Area

Anderson¹,

Bideganeta²,

Mitchell³

1985

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“…2). Strata that can be correlated stratigraphically are exposed in places from the northern margin of the Snake River Plain on the south to the Clayton, Idaho area on the north (Umpleby and others, 1930;Anderson and others, 1950;Sandberg and others, 1975;Skipp and Hall, 1975;Skipp and Sandberg, 1975;Carter and Churkin, 1977;Batchelder and Hall, 1978;Carstensen, 1983;Hall, 1985). Hall (1985) named the part of this belt from Bellevue area north to the Salmon River area the central Idaho black-shale mineral belt.…”

Section: Geology Regional Geologymentioning

confidence: 99%

Geology of an Ordovician stratiform base-metal deposit in the Long Canyon Area, Blaine County, Idaho

Otto¹,

Zieg²

2003

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In the Long Canyon area, Blaine County, Idaho, a stratiform base-metal-bearing gossan is exposed within a complexly folded and faulted sequence of Ordovician strata. The gossan horizon in graptolitic mudrock suggests preservation of bedded sulfides that were deposited by an Ordovician subaqueous hydrothermal system. Abrupt thickness changes and geochemical zoning in the metal-bearing strata suggest that the gossan is near the source of the hydrothermal system. Ordovician sedimentary rocks at Long Canyon represent a coarsening-upward section that was deposited below wave base in a submarine depositional environment. The lowest exposed rocks represent deposition in a starved, euxinic basin and overlying strata represent a prograding clastic wedge of terrigenous and calcareous detritus. The metalliferous strata are between these two types of strata. Strata at Long Canyon have been deformed by two periods of thrust faulting, at least three periods of normal faulting, and two periods of folding. Tertiary extensional faulting formed five subhorizontal structural plates. These low-angle fault-bounded plates truncate Sevier-age and possibly Antler-age thrust faults. The presence of gossan-bearing strata in the four upper plates suggests that there was only minor, although locally complex, stratigraphic displacement and rotation. The lack of correlative strata in the lowest plate suggests the displacement was greater than 2000 ft. The metalliferous strata were exposed to surface weathering, oxidation, and erosion prior to and during deposition of the Eocene Challis Volcanic Group. The orientations of erosional canyons formed during this early period of exposure were related to the orientations of Sevier-age thrust faults, and stream-channel gravel was deposited in the canyons. During this and subsequent intervals of exposure, sulfidic strata were oxidized to a minimum depth of 700 ft.

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“…Numerous studies of the geology and geothermal resources of the Wood River and adjacent areas have been made. Geologic studies have been conducted to investigate mineral deposits (Umpleby and others, 1930; Anderson and Wagner, 1946; Anderson and others, 1950; Hall and others, 1978); individual formations and units (Hall and others, 1974; Sandberg and others, 1975); quadrangles (Batchelder and Hall, 1978) and to compile regional information (Rember and Bennett, 1979). Currently, workers from the U .…”

Section: Previous Studiesmentioning

confidence: 99%

Geothermal resource analysis in the Big Wood River Valley, Blaine County, Idaho

Street¹

1990

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Preliminary geologic map of the Hailey 7 1/2-minute quadrangle, Idaho

Cited by 5 publications

References 0 publications

Water information bulletin No. 30, part 13: geothermal investigations in Idaho. Preliminary geologic reconnaissance of the geothermal occurrences of the Wood River Drainage Area

Water information bulletin No. 30, part 13: geothermal investigations in Idaho. Preliminary geologic reconnaissance of the geothermal occurrences of the Wood River Drainage Area

Geology of an Ordovician stratiform base-metal deposit in the Long Canyon Area, Blaine County, Idaho

Geothermal resource analysis in the Big Wood River Valley, Blaine County, Idaho

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