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GEOREF RECORD

Textural preservation in siliceous hot spring deposits during early diagenesis; examples from Yellowstone National Park and Nevada, U.S.A.

Nancy W. Hinman and Malcolm R. Walter
Textural preservation in siliceous hot spring deposits during early diagenesis; examples from Yellowstone National Park and Nevada, U.S.A.
Journal of Sedimentary Research (March 2005) 75 (2): 200-215

Abstract

A petrographic, mineralogical, and geochemical investigation reveals evidence for selective preservation of microfacies in siliceous sinters. Plio-Pleistocene sinters from Steamboat Springs, Nevada, contain identical but fewer petrographic textures than Pleistocene sinters from Artist Point, Yellowstone National Park, Wyoming. The latter are preserved in altered sediments of unknown origin. A sequence of pore-filling and mineralogical changes explains the excellent preservation of nine microfacies and two petrographic textures. Plio-Pleistocene Steamboat Springs sinters are preserved in successions of andesitic basalt flows and were likely subjected to a more extreme thermal and a different hydrological environment than those from Yellowstone National Park. Most microfacies were obliterated during postdepositional heating of Steamboat Spring sinters. Differences in diagenetic histories related to depositional environment, water chemistry, and/or subsequent burial must account for the loss of textural evidence between the diagenetic stage represented by Artist Point sinters and that of Steamboat Springs sinters. Hence, early postdepositional history affects both the likelihood and quality of microfossil preservation.


ISSN: 1527-1404
EISSN: 1938-3681
Serial Title: Journal of Sedimentary Research
Serial Volume: 75
Serial Issue: 2
Title: Textural preservation in siliceous hot spring deposits during early diagenesis; examples from Yellowstone National Park and Nevada, U.S.A.
Affiliation: University of Montana, Department of Geology, Missoula, MT, United States
Pages: 200-215
Published: 200503
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
References: 86
Accession Number: 2005-030979
Categories: Sedimentary petrologyHydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N44°10'00" - N45°00'00", W111°04'60" - W109°49'60"
N39°07'00" - N42°00'00", W120°00'00" - W119°10'00"
Secondary Affiliation: Macquarie University, AUS, Australia
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 200511
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