Barite and phosphate in Devonian Slaven Chert
Conference
·
OSTI ID:6776734
Bedded barite and phosphate within the Slaven Chert in East Northumberland Canyon, Toquima Range, Nye County, Nevada, formed within an oxygen minimum zone during Late Devonian. The East Northumberland Canyon deposits are a part of the Roberts Mountains allochthon, which was overthrusted onto eastern carbonate shelf deposits by the Late Devonian-Early Mississippian Antler orogeny. Petrographic and stratigraphic analyses of the barite and chert beds indicate they formed as sedimentary and early diagenetic precipitates. The barite occurs as layers of fine crystals and/or spherulites. The finely crystalline beds lack matrix chert and probably formed at and/or above the sediment-water interface. In contrast, radiating spherulites have radiolarian fossils, phosphate, and silt grains within them, and are most commonly associated with matrix chert. These data suggest that the spherulites grew within the sediment as an early diagenetic mineral. High organic-matter concentrations (up to 6%), well-preserved microfossil skeletal hash, and phosphate in barite and chert deposits indicate that the rocks formed in an anoxic environment. REE values of phosphate from the Slaven Chert resemble patterns of phosphorites formed in zones of coastal upwelling at low latitudes versus phosphate formed in non-upwelling areas. These facts suggest the barite, chert, and phosphate formed within an oxygen minimum zone associated with coastal upwelling currents.
- OSTI ID:
- 6776734
- Report Number(s):
- CONF-880301-
- Country of Publication:
- United States
- Language:
- English
Similar Records
Barite nodules in bedded barite within phosphatic Devonian Slaven Chert, Toquima Range, central Nevada
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Conference
·
Tue Feb 28 23:00:00 EST 1989
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
·
OSTI ID:6085875
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Journal Article
·
Sat Feb 29 23:00:00 EST 1992
· Geology; (United States)
·
OSTI ID:7004169
Devono-Mississippian sedimentary environments at the type Antler orogen at Battle Mountain, Nevada
Conference
·
Mon Dec 31 23:00:00 EST 1984
· Geol. Soc. Am., Abstr. Programs; (United States)
·
OSTI ID:6461694
Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
BARITE
BARIUM COMPOUNDS
BARIUM SULFATES
CARBONATE ROCKS
CATAGENESIS
CHERT
DEPOSITION
DEVONIAN PERIOD
EXPLORATION
FEDERAL REGION IX
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
MINERAL RESOURCES
MINERALIZATION
MINERALOGY
MINERALS
NATURAL GAS DEPOSITS
NEVADA
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
PETROGENESIS
PETROGRAPHY
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
PHOSPHATES
PHOSPHORUS COMPOUNDS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
STRATIGRAPHY
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
USA
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
BARITE
BARIUM COMPOUNDS
BARIUM SULFATES
CARBONATE ROCKS
CATAGENESIS
CHERT
DEPOSITION
DEVONIAN PERIOD
EXPLORATION
FEDERAL REGION IX
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGY
MINERAL RESOURCES
MINERALIZATION
MINERALOGY
MINERALS
NATURAL GAS DEPOSITS
NEVADA
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
PETROGENESIS
PETROGRAPHY
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
PHOSPHATES
PHOSPHORUS COMPOUNDS
RESOURCES
ROCKS
SEDIMENTARY ROCKS
STRATIGRAPHY
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
USA