Results 11 to 20 of about 736 (184)

Biomineralization of primary carbonate cements: a new biosignature in the fossil record from the Anisian of Southern Italy

open access: yesLethaia, EarlyView., 2021
Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido   +4 more
wiley   +1 more source

Dolomitized tidal cycles in the Agua de la Mula Member of the Agrio Formation (Lower Cretaceous), Neuquén Basin, Argentina

open access: yesLatin American Journal of Sedimentology and Basin Analysis, 2021
The Agrio Formation (Valanginian to early Barremian) is a siliciclastic and carbonate unit of the Neuquén Basin in west central Argentina. A conspicuous 20 m thick dolomitized section near the top of the upper Agua de la Mula Member of the Agrio ...
Maisa A. Tunik   +4 more
doaj   +2 more sources

Dolomite geochemistry of the Cambrian Longwangmiao Formation, eastern Sichuan Basin: Implication for dolomitization and reservoir prediction

open access: yesPetroleum Research, 2017
Based on petrology and mineralogy, the geochemical characteristics of dolomite in the Cambrian Longwangmiao Formation in the eastern Sichuan Basin, were carried out.
Ying Ren   +7 more
doaj   +1 more source

Diagenetic facies of carbonate rocks in Yijianfang Formation, Shunbei area, Tarim Basin

open access: yesShiyou shiyan dizhi, 2020
The diagenetic facies of the Ordovician Yijianfang Formation in the Shunbei area of the Tarim Basin was analyzed using drilling core description, thin section observation, as well as logging trace and seismic data analysis.
Chuanjie CHENG   +4 more
doaj   +1 more source

Hydrothermal dolomitization in Dengying Formation, Gaoshiti-Moxi area, Sichuan Basin, SW China

open access: yesPetroleum Exploration and Development, 2016
: The formation conditions, existence evidence, modification modes and timing of hydrothermal dolomitization in the Sinian Dengying Formation are studied based on the basic geological conditions, mineral assemblages in dolomites, and geochemical features
Yuqiang Jiang   +7 more
doaj   +1 more source

Massive dolomitization driven by MgSO-rich seawater and its effects on thermochemical sulfate reduction, Upper Permian Changxing Formation, northeastern Sichuan, China

open access: yesEnergy Exploration & Exploitation, 2022
Massive dolostones replacing build-ups and containing H2S of thermochemical sulfate reduction (TSR) origin occur in the Upper Permian reef and bank deposits, northeastern Sichuan, China, despite the absence of gypsum or anhydrite deposits, which are ...
Kaikai Li   +4 more
doaj   +1 more source

Characteristics, formation and evolution of pre-salt dolomite reservoirs in the fifth member of the Ordovician Majiagou Formation, mid-east Ordos Basin, NW China

open access: yesPetroleum Exploration and Development, 2019
The characteristics and formation of the pre-salt dolomite reservoirs in the fifth member of Ordovician Majiagou Formation in the mid-east Ordos Basin are investigated through observation of cores and thin sections, and geochemical analysis.
Siyi FU   +8 more
doaj   +1 more source

Restoration of formation processes of dolomite reservoirs based on laser U-Pb dating: A case study of Ordovician Majiagou Formation, Ordos Basin, NW China

open access: yesPetroleum Exploration and Development, 2022
To address the issue of non-unique interpretation of dolomite reservoir diagenetic and porosity evolution in the previous qualitative or semi-quantitative studies, we investigate two dolomite reservoir types, i.e.
Jingao ZHOU   +7 more
doaj   +1 more source

Genesis and dolomitization of “Khali” powder crystal dolomite in Triassic Jialingjiang Formation, Moxi gas field, central Sichuan Basin, SW China

open access: yesPetroleum Exploration and Development, 2014
Taking the B bed of the second submember of the second member of Triassic Jialingjiang Formation in Moxi gas field as an example, the basic characteristics and controlling factors of the “Khali” powder dolomite reservoir is analyzed systematically, and ...
Hao TANG   +7 more
doaj   +1 more source

Characteristics and Formation Mechanism of the Lower Paleozoic Dolomite Reservoirs in the Dongying Depression, Bohai Bay Basin

open access: yesEnergies, 2022
The Lower Paleozoic carbonate strata experience multi-stage tectonic activity and post-depositional volcanic activity in the Dongying Depression, Bohai Bay basin.
Xuemei Zhang   +6 more
doaj   +1 more source

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