Results 41 to 50 of about 92,675 (274)

Characteristics and evolution of microbial carbonate reservoirs in the Pingliang Formation on the southern margin of Ordos Basin

open access: yesShiyou shiyan dizhi, 2022
As an important type of hydrocarbon reservoir, microbial carbonate contains great amount of hydrocarbon resources. The recent discovery of industrial gas in the Majiagou Formation in the east-central part of the Ordos Basin indicates that this type of ...
Juntao ZHANG   +4 more
doaj   +1 more source

Late Ordovician gastropods from the Zhaolaoyu Formation in the southwestern margin of the North China Platform [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
The Ordos Basin is located in the western part of the North China Platform and is the second largest sedimentary basin in China; the basin has a huge thickness of the Early Palaeozoic marine deposits, especially the Ordovician ones.
Rao Fu   +6 more
doaj   +1 more source

Controlling factors for effective reservoir development of Ordovician Kelimoli Formation in western Ordos Basin

open access: yesShiyou shiyan dizhi, 2023
In recent years, some progress has been made in the exploration of Ordovician natural gas in the western Ordos Basin, among which, the Ordovician Kelimoli Formation has the highest degree of natural gas accumulation.
Huimin LI   +7 more
doaj   +1 more source

Early Tremadocian cephalopods from Santa Rosita Formation in NW Argentina: the oldest record for South America [PDF]

open access: yesActa Palaeontologica Polonica, 2023
We describe early Tremadocian (Kainella meridionalis Biozone) cephalopods from the Cordillera Oriental, Jujuy, NW Argentina. They consist of numerous small specimens collected at the Quebrada de Arenal, Trancas section, near the town of Tilcara, in the
MARCELA CICHOWOLSKI   +5 more
doaj   +1 more source

Ordovician cyclostratigraphy and astrochronology

open access: yesGeological Society, London, Special Publications, 2023
Abstract Cyclostratigraphy is an important tool for understanding astronomical climate forcing and for reconstructing geological time in sedimentary sequences, provided that an imprint of insolation variations caused by Earth's orbital eccentricity, obliquity and precession is preserved (Milankovitch forcing).
openaire   +3 more sources

Cambrian explosion and Ordovician biodiversification or Cambrian biodiversification and Ordovician explosion?

open access: yesEvolving Earth, 2023
In this study, we examine how metazoan biodiversity has accumulated from the late Precambrian until the Silurian at various scales of taxonomic organization using compilations of the First Appearance Data (FAD) of global marine Metazoa from the datasets available in the Paleobiology Database (PBDB) and primary literature.
Servais, Thomas   +5 more
openaire   +2 more sources

Differences in marine hydrocarbon accumulation between the eastern and western parts of Shunbei area, Tarim Basin

open access: yesShiyou shiyan dizhi, 2023
From the eastern to the western part of Shunbei area in the Tarim Basin, the accumulations of marine oil and gas obviously decrease with the exploration risks significantly increasing.
Lixin QI, Yong DING
doaj   +1 more source

Large mass-independent sulphur isotope anomalies link stratospheric volcanism to the Late Ordovician mass extinction

open access: yesNature Communications, 2020
Volcanic eruptions are thought to be a key driver of rapid climate perturbations over geological time, such as global cooling, global warming, and changes in ocean chemistry.
D. Hu   +5 more
semanticscholar   +1 more source

Late Ordovician Palynomorphs [PDF]

open access: yesJournal of Micropalaeontology, 1985
Abstract. ACRITARCHSOrdovician acritarchs have been recorded in five core samples collected between 2520 ft. and 3000 ft. in Well E1-81, and ten cutting samples taken between 12150 ft. and 13240 ft. in Well J1-81A. All the assemblages recovered are of Late Ordovician age; no Early Ordovician or Middle Ordovician assemblages have been identified ...
Stewart G. Molyneux, Florentin Paris
openaire   +3 more sources

Enhanced microbial activity in carbon-rich pillow lavas, Ordovician, Great Britain and Ireland [PDF]

open access: yes, 2015
Date of acceptance: 09/07/2015 ACKNOWLEDGEMENTS A. Sandison and C. Taylor provided skilled technical support. Boyce is funded by Natural Environment Research Council (NERC) support of the Isotope Community Support Facility at the Scottish Universities ...
Bowden, Stephen   +5 more
core   +2 more sources

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