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Title: Clinoptilolite and associated authigenic minerals in Miocene tuffaceous rocks in the Goose Creek Basin, Cassia County, Idaho

Abstract

Miocene tuffaceous fluviolacustrine deposits in the southeastern part of the Goose Creek basin contain a variety of authigenic minerals, including clinoptilolite, smectite, pyrite, gypsum, and calcite. Clinoptilolite is the primary mineral in the diagenetically altered rhyolitic vitric tuffs in the study area. These zeolitic tuffs locally attain thicknesses of as much as 30 meters. Examinations of samples of the altered tuff beds using the scanning electron microscope reveal that the clinoptilolite usually occurs as clean, well-formed tabular crystals about 0.005 mm across in a matrix of smectite. Prismatic clinoptilolite crystals, as much as 0.06 mm long, are present in the larger vugs. During the Miocene, thick beds of air-fall rhyolitic vitric volcanic ash accumulated in the Goose Creek basin in a coalescing fluviolacustrine depositional setting. In the southeastern part of the basin, the volcanic ash was deposited in a lacustrine fan delta, where it was partly reworked and interbedded with sandstone and siltstone. Diagenetic alteration of the ash beds proceeded in an open hydrologic system. Solution and hydrolysis by ground water initially altered the glass shards to form smectite and silica gel. Clinoptilolite subsequently precipitated on the altered shard surfaces. The paragenesis of pyrite, gypsum, and calcite in the zeoliticmore » tuffs is uncertain.« less

Authors:
;
Publication Date:
Research Org.:
Geological Survey, Denver, CO (USA)
OSTI Identifier:
6611429
Report Number(s):
CONF-8510489-
Journal ID: CODEN: GAAPB
Resource Type:
Conference
Journal Name:
Geol. Soc. Am., Abstr. Programs; (United States)
Additional Journal Information:
Journal Volume: 17; Conference: 98. annual meeting of the Geological Society of America, Orlando, FL, USA, 28 Oct 1985
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; IDAHO; SEDIMENTARY BASINS; CLINOPTILOLITE; TUFF; MINERALOGY; PARAGENESIS; PETROGENESIS; ALLUVIAL DEPOSITS; CALCITE; DIAGENESIS; GEOLOGIC HISTORY; GYPSUM; MIOCENE EPOCH; PYRITE; SMECTITE; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; ALUMINIUM SILICATES; CALCIUM CARBONATES; CALCIUM COMPOUNDS; CALCIUM SULFATES; CARBON COMPOUNDS; CARBONATE MINERALS; CARBONATES; CENOZOIC ERA; CHALCOGENIDES; CLAYS; FEDERAL REGION X; GEOLOGIC AGES; GEOLOGIC DEPOSITS; GEOLOGIC STRUCTURES; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; IRON COMPOUNDS; IRON SULFIDES; MATERIALS; MINERALS; NORTH AMERICA; OXYGEN COMPOUNDS; SILICATE MINERALS; SILICATES; SILICON COMPOUNDS; SULFATE MINERALS; SULFATES; SULFIDE MINERALS; SULFIDES; SULFUR COMPOUNDS; TERTIARY PERIOD; TRANSITION ELEMENT COMPOUNDS; USA; ZEOLITES; 580300* - Mineralogy, Petrology, & Rock Mechanics- (-1989); 580400 - Geochemistry- (-1989)

Citation Formats

Brownfield, M E, and Hildebrand, R T. Clinoptilolite and associated authigenic minerals in Miocene tuffaceous rocks in the Goose Creek Basin, Cassia County, Idaho. United States: N. p., 1985. Web.
Brownfield, M E, & Hildebrand, R T. Clinoptilolite and associated authigenic minerals in Miocene tuffaceous rocks in the Goose Creek Basin, Cassia County, Idaho. United States.
Brownfield, M E, and Hildebrand, R T. 1985. "Clinoptilolite and associated authigenic minerals in Miocene tuffaceous rocks in the Goose Creek Basin, Cassia County, Idaho". United States.
@article{osti_6611429,
title = {Clinoptilolite and associated authigenic minerals in Miocene tuffaceous rocks in the Goose Creek Basin, Cassia County, Idaho},
author = {Brownfield, M E and Hildebrand, R T},
abstractNote = {Miocene tuffaceous fluviolacustrine deposits in the southeastern part of the Goose Creek basin contain a variety of authigenic minerals, including clinoptilolite, smectite, pyrite, gypsum, and calcite. Clinoptilolite is the primary mineral in the diagenetically altered rhyolitic vitric tuffs in the study area. These zeolitic tuffs locally attain thicknesses of as much as 30 meters. Examinations of samples of the altered tuff beds using the scanning electron microscope reveal that the clinoptilolite usually occurs as clean, well-formed tabular crystals about 0.005 mm across in a matrix of smectite. Prismatic clinoptilolite crystals, as much as 0.06 mm long, are present in the larger vugs. During the Miocene, thick beds of air-fall rhyolitic vitric volcanic ash accumulated in the Goose Creek basin in a coalescing fluviolacustrine depositional setting. In the southeastern part of the basin, the volcanic ash was deposited in a lacustrine fan delta, where it was partly reworked and interbedded with sandstone and siltstone. Diagenetic alteration of the ash beds proceeded in an open hydrologic system. Solution and hydrolysis by ground water initially altered the glass shards to form smectite and silica gel. Clinoptilolite subsequently precipitated on the altered shard surfaces. The paragenesis of pyrite, gypsum, and calcite in the zeolitic tuffs is uncertain.},
doi = {},
url = {https://www.osti.gov/biblio/6611429}, journal = {Geol. Soc. Am., Abstr. Programs; (United States)},
number = ,
volume = 17,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}

Conference:
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