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Bighorn sheep went extinct on desert island in Gulf of California, study finds
Bighorn sheep extinct desert island Gulf of California
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2014/3/28
RIVERSIDE, Calif. — Using ancient DNA analysis and other techniques, a research team led by conservation biologists at the University of California, Riverside has determined that bighorn sheep, so nam...
The drift and spreading of the Runner 4 oil spill and the ice conditions in the Gulf of Finland,winter 2006
Runner 4 oil spill sea ice drift spreading Gulf of Finland
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2009/10/21
The drift and spreading of the Runner 4 oil spill in the ice-covered Gulf of Finland is analysed. The oil spill was caused by the sinking of the Dominican-registered cargo ship Runner 4 on 5 March 200...
Preferred Orientation of Phyllosilicates in Gulf Coast Mudstones and Relation to the Smectite-Illite Transition
Gulf Coast Phyllosilicates Preferred Orientation Smectite-Illite Transition
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2011/12/7
Abstract: Development of preferred orientations of illite-smectite (I-S) has been studied using X-ray diffraction (XRD) texture goniometry to produce pole figures for clay minerals of a suite of 16 mu...
Oxygen Isotope Compositions of Mixed-Layer Serpentine-Chlorite and Illite-Smectite in the Tuscaloosa Formation (U.S. Gulf Coast): Implications for Pore Fluids and Mineralogic Reactions
Diagenesis Illite-Smectite Oxygen Isotopes Sandstone Serpentine-Chlorite Tuscaloosa Formation
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2011/12/8
Abstract: Oxygen isotopic compositions were determined for coexisting mixed-layer serpentine-chlorite (Sp-Ch) and illite-smectite (I-S) from 5 Tuscaloosa Formation sandstone cores sampled between 1937...
Smectite Illitization in Pliocene-Age Gulf of Mexico Mudrocks
Clay Diagenesis Core Analysis Gulf of Mexico Illite Smectite TEM XRD
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2011/12/1
Abstract: Utilizing high-resolution transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD) techniques, we have studied the transition from shallower s...
Comparison of the Mineralogical and Chemical Composition of 2 Shales from the Western Canada Sedimentary Basin and the United States Gulf Coast
Deposition Diagenesis Geochemistry Mineralogy Mixed-Layer Illite/Smectite Oxygen Isotopes
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2011/12/9
Abstract: The mineralogy and geochemistry of shales reflect the composition of the initially deposited precursor mud, subsequently modified by diagenetic processes. To see if significant geochemical d...
The origin and diagenesis of grain-coating serpentine-chlorite in Tuscaloosa Formation sandstone, U.S. Gulf Coast
origin diagenesis grain-coating serpentine-chlorite Tuscaloosa Formation sandstone
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2012/4/5
Randomly interstratified serpentine-chlorite (Sp-Ch) is ubiquitous in sandstones ofthe subsurface Tuscaloosa Formation. TheSp-Choccursasgraincoatings, porefillings, pel-oids,andinfillings.Thepresenceo...
A Chemical, XRD, and 27Al MAS NMR Investigation of Miocene Gulf Coast Shales with Application to Understanding Illite/Smectite Crystal-Chemistry
Burial diagenesis Gulf Coast Illite/smectite Miocene NMR
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2011/12/30
This study assesses the distribution of Al and Fe in mixed-layer illite/smectites (I/S) in shales undergoing burial diagenetic changes, using evidence from 27Al NMR, XRD, and chemical analyses. Sample...
Illite/Smectite from Gulf Coast Shales: A Reappraisal of Transmission Electron Microscope Images
Illite/smectite Lattice-fringe images Periodicity Transmission electron microscopy X-ray powder diffraction
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2012/1/9
Transmission electron microscope (TEM) images of mixed-layer illite/smectite (I/S) from Gulf Coast shales obtained earlier by the authors have been reexamined by comparing them with the calculated ima...
Authigenesis of Kaolinite and Chlorite in Texas Gulf Coast Sediments
Authigenesis Back-scattered electron imaging Chlorite Illite/smectite Iron Kaolinite
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2012/1/11
Core cuttings from numerous wells traversing Oligocene through Recent sediments of the Texas Gulf Coast were examined with a scanning electron microscope using the back-scattered electron imaging mode...
Transmission Electron Microscopic Study of Diagenetic Chlorite in Gulf Coast Argillaceous Sediments
Berthierine Chlorite Diagenesis Illite/smectite Transmission electron microscopy
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2012/2/1
Transmission and analytical electron microscopy have been used to study the diagenesis of the trioctahedral component of phyllosilicates (principally chlorite) in argillaceous core samples (depths of ...
Burial Diagenesis in Gulf Coast Pelitic Sediments
Burial Diagenesis Gulf Coast Pelitic Sediments
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2012/2/20
Subsurface samples of shales ranging in age from Pleistocene to Eocene obtained from five Gulf Coast oil wells were examined mineralogically and chemically to determine the nature and extent of burial...