Results 81 to 90 of about 5,620 (262)

The Toarcian black shale event in northern Italy

Organic Geochemistry, 1988
Abstract During the Early Toarcian (Jurassic; c . 192 Ma), organic-rich sediments were deposited in many areas of Europe. This paper reports the major findings of the first part of an organic geochemical investigation of the Toarcian Oceanic Anoxic Event (OAE).
Farrimond, P, Eglinton, G, Brassell, S, Jenkyns, H   +3 more
openaire   +2 more sources

Demonstration of an instream flow model to accommodate a threatened tiger beetle in riverine dune habitat

Insect Conservation and Diversity, EarlyView.
Burrows of the threatened Gibson's Big Sand Tiger Beetle in riverine dune habitats are susceptible to flooding through managed flows. HEC‐RAS modelling identified the flow thresholds above which flooding would occur for burrows and affect the beetle larvae. These findings provide instream flow guidelines for conserving this threatened species and guide
Iain D. Phillips, Aaron J. Bell, Faline Drummond   +2 more
wiley   +1 more source

Mechanisms of Uranium and Thorium Accumulation in the Lower Ediacaran Marine Sediments from the Upper Yangtze Platform, China: Implications for Helium Exploration

Journal of Marine Science and Engineering
The ocean is a significant global reservoir of uranium (U) and thorium (Th). These elements can be incorporated into marine sediments through processes involving organic matter (OM), redox conditions, terrigenous inputs, and mineral interactions.
Yi Zou, Qingyong Luo, Huayao Zou, Jianfa Chen, Wenming Ji, Jin Wu, Tao Du, Xintong Liu, Zilong Fang, Wenxin Hu, Ye Zhang, Jinqi Qiao   +11 more
doaj   +1 more source

Az Óbányai Aleurolit Formáció fekete palájának izotópgeokémiai és szénhidrogéngenetikai jellemzése | Isotope geochemistry and characterization of hydrocarbon potential of black shale from Óbánya Siltstone Formation

, 2007
A toarci Óbányai Aleurolit Formáció réka-völgyi szelvényének (Mecsek hegység) alsó részéből gyűjtött fekete pala minták összes szerves szén-tartalma a laminált kőzettípusban 3,89–8,12%, a vékonyréteges változatban 2,14–3,29%.
Rostási, Ágnes, Raucsikné Varga, Andrea Beáta, Raucsik, Béla, Hámorné Vidó, Mária   +3 more
core  

Synchrotron texture image plate data of Appalachian black shales

, 2018
<p>Synchrotron image plate data from texture measurements of Devonian black shales from the Appalachian plateau </p ...
Leiss, Bernd (8224239), Kuehn, Rebecca, Leiss, Bernd, Kuehn, Rebecca (8224233)   +3 more
core   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

Organic matter characteristics in black shales of the southwestern paleogene N'kapa formation, Douala Sub-basin Cameroon: Evidence from stable isotopes and rock-eval pyrolysis

Evolving Earth
Shallow marine black shales from outcrops, river channels, drilled and dug wells in Dibombari-Kompina-Mian (Stage-1) and Pendanboko (Stage-2) of the Paleogene N'kapa Formation in Douala Sub-basin were studied.
Ngong Roger Ngia, Elie Fosso Menkem, Alexandrine N'nanga, Christopher Fuanya, Median Yongye   +4 more
doaj   +1 more source

Origin and Enrichment of Vanadium in the Lower Cambrian Black Shales, South China. [PDF]

ACS Omega, 2021
Wu T, Yang R, Gao L, Li J, Gao J.
europepmc   +1 more source

Clay mineralogy of Chinese black shales

, 1994
Lermineralogi, black shales ...
Buchardt, Bjørn, Liu, Kuiwu
core  

Late Cretaceous black shales from the tuscan sedimentary succession (northern Tuscany, Italy): Geochemistry and ore mineralogy

, 2021
We report on the first geochemical and mineralogical study of the Late Cretaceous black shales and black phyllites occurring within the basal portion of the “Scaglia toscana” and “Scisti sericitici” formations, respectively (Northern Apennines, northern ...
Mantovani D., D'Orazio M., Biagioni C.
core   +1 more source