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Mineralogy and petrology of the Paleocene Clayton and Porters Creek Formations, Missouri, USA; influence of Cretaceous-Paleogene impact debris and diagenes

Daniel Larsen, Daniel J. Ashe and John Gustavson
Mineralogy and petrology of the Paleocene Clayton and Porters Creek Formations, Missouri, USA; influence of Cretaceous-Paleogene impact debris and diagenes (in Paying attention to mudrocks; priceless!, Daniel Larsen (editor), Sven O. Egenhoff (editor) and Neil S. Fishman (editor))
Special Paper - Geological Society of America (August 2015) 515: 103-123

Abstract

The results of the petrographic analysis show no evidence for volcanic ash contributing directly to the sediment in the PCF. The detrital silicate minerals are mainly quartz, muscovite, biotite, and metamorphic minerals, consistent with an ancestral Appalachian Mountains source rather than volcanic ash or a Cretaceous western interior sediment source. The illite, kaolinite, dioctahedral smectite, and ordered illite-smectite mixed-layered clays are present in varying quantities in Cretaceous through Paleogene marine and nonmarine mudstones from the Mississippi embayment, and appear to be detrital in origin. Trioctahedral smectite and clinoptilolite in the CF and lowermost PCF are argued to derive from alteration of glassy impact debris; clasts in the basal CF contain microtektites replaced by trioctahedral smectitic mixed-layered clay with randomly interstratified illite. The X-ray diffraction characteristics of the vermiculite in the PCF indicate a hydroxyl-interlayered aluminous variety that is argued to have a diagenetic origin, formed by clay mineral reactions under variably anoxic conditions in the PCF sediments during early diagenesis. Throughout the CF and PCF, pyrite precipitated under reducing conditions during diagenesis, locally along with siderite replacement of micritic carbonate. In addition, opal-CT precipitated as a result of silicate reactions and dissolution of diatoms under alkaline conditions and replaced matrix and calcitic microfossils throughout much of the upper PCF.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 515
Title: Mineralogy and petrology of the Paleocene Clayton and Porters Creek Formations, Missouri, USA; influence of Cretaceous-Paleogene impact debris and diagenes
Title: Paying attention to mudrocks; priceless!
Author(s): Larsen, DanielAshe, Daniel J.Gustavson, John
Author(s): Larsen, Danieleditor
Author(s): Egenhoff, Sven O.editor
Author(s): Fishman, Neil S.editor
Affiliation: University of Memphis, Department of Earth Sciences, Memphis, TN, United States
Affiliation: University of Memphis, Department of Earth Sciences, Menphis, TN, United States
Pages: 103-123
Published: 20150806
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 67
Accession Number: 2015-093967
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch map
N36°55'46" - N36°55'46", W89°50'52" - W89°50'52"
Secondary Affiliation: Colorado State University, USA, United StatesU. S. Geological Survey, USA, United States
Source Note: Online First
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201540
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