Results 11 to 20 of about 8,930 (209)

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+3 more sources

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ<sup>15</sup>N Integrity of Nitrogen-Poor Samples. [PDF]

open access: yesRapid Commun Mass Spectrom
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Bubphamanee K, Schauer A, Buick R.
europepmc   +2 more sources

The kerogen in pyrobituminous shale.

open access: yes, 1923
Kerogen is the name given to the organic matter which occurs in coal and pyrobituminous shale. The correct adjective to describe a kerogen-containing shale is "pyrobituminous", which indicates that it gives an oil on pyrolysis or destructive distillation, - its most important property commercially. [...]
McKinney, James W.
openaire   +2 more sources

Insights into the Influence of Geochemistry on Kerogen and Organic-rich Mudrocks [PDF]

open access: yes, 2023
The investigation of geochemical factors and their influence on kerogen and organic-rich mudrocks has profound implications for reservoir characterization, hydrocarbon exploration, and production strategies.
Mohammad, alaqib
core   +1 more source

Molecular Weight Distribution of Kerogen with MALDI-TOF-MS [PDF]

open access: yes, 2020
Kerogen is an amorphous organic matter (AOM) in fine grain sediments, which produces petroleum and other byproducts when subjected to adequate pressure and temperature (deep burial conditions).
Hyeonseok, Lee   +4 more
core   +1 more source

Three-dimensional molecular modeling of Dachengzi oil shale kerogen [PDF]

open access: yesOil Shale, 2022
A three-dimensional (3D) molecular model of Dachengzi oil shale kerogen was constructed using quantitative 13C direct polarization/magic angle spinning solid-state nuclear magnetic resonance (DP/MAS SSNMR) data and accurate quantum chemistry methods. The
Xiaoye Wang   +4 more
doaj   +1 more source

Red to Green: A Lipid Biomarker Record of Tonian-Ediacaran Algae in Siberia. [PDF]

open access: yesGeobiology
ABSTRACT Multiple lines of evidence point to a major diversification of Eukarya in the late Tonian period, ca. 800–720 Ma ago. Regular steranes, lipid biomarkers primarily sourced from eukaryotes, are first unambiguously reported from multiple sites. Here, we present lipid biomarker stratigraphic records from two drill‐cores from the Lena‐Anabar Basin ...
Rizzo AI   +7 more
europepmc   +2 more sources

Large undiscovered oil resources are predicted south of Russia

open access: yesJournal of Petroleum Exploration and Production Technology, 2019
Stavropol Region is one of the oldest petroleum provinces on South of Russian Federation. Today, most of its fields are depleted and prospects for the discovery of new large hydrocarbon deposits considered exhausted. However, our studies allow us to talk
Vladimir Sova, Abdul-Gapur Kerimov
doaj   +1 more source

Developing an Amorphous Kerogen Molecular Model Based on Gas Adsorption Isotherms [PDF]

open access: yes, 2020
(1) Development of molecular models based on Bakken kerogen experiments using molecular dynamics and quantum mechanics software.(2) CO2 and N2 gas molecules adsorption simulation on the models was a good agreement with experiments.
Hyeonseok, Lee   +4 more
core   +1 more source

Application of X-ray Diffraction (XRD) and Rock–Eval Analysis for the Evaluation of Middle Eastern Petroleum Source Rock

open access: yesEnergies, 2021
In this study, collected samples of nine different wells from the Middle East are used for various geochemical analyses to determine the hydrocarbon generation potential. The determination is carried out following the grain density, specific surface area,
Golam Muktadir   +4 more
doaj   +1 more source

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