Results 21 to 30 of about 5,331 (209)
Geochemistry and Petrogenesis of Carboniferous volcanic rocks, NW Marand: Evidence for interacontinental rift Magmatism) [PDF]
پترولوژی, 2020 The studied volcanic-sedimentary sequence located at the East-Azarbaijan province, north Marand and in the Central Iranian structural zone. The studied sequence composed of alternative sandstone, shale, conglomerate, limestone, felsic volcaniclastics ...
Zahra Badrzadeh +2 more
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Study on the Upper Paleozoic Source Rocks in Southwestern Henan, China [PDF]
E3S Web of Conferences, 2021 The Upper Paleozoic strata in Southwestern Henan have good prospects for unconventional oil and gas exploration. This paper takes the Upper Paleozoic source rocks in the Yuzhou area and the Pingdingshan area in Southwestern Henan as the research object ...
Sun Fengyu, Cao Gaoshe, Xing Zhou
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On Paleozoic platycerate gastropods
Zitteliana, 2023 The platycerate gastropods Orthonychia yutaroi Ebbestad, sp. nov. (Ordovician, Boda Limestone, Sweden), O. enorme (Silurian, Sweden, Gotland), O. parva (Pennsylvanian, Finis Shale Member, USA), and Orthonychia sp. (Mississippian, Imo Formation, USA) are studied including their protoconch morphology.
Alexander Nützel +5 more
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A new middle Cambrian trilobite with a specialized cephalon from Shandong Province, North China [PDF]
Acta Palaeontologica Polonica, 2020 Trilobites achieved their maximum generic diversity in the Cambrian, but the peak of morphological disparity of their cranidia occurred in the Middle to Late Ordovician. Early to middle Cambrian trilobites with a specialized cephalon are rare, especially
Zhixin Sun, Han Zeng, Fangchen Zhao
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ASYNCHRONOUS DEVELOPMENT OF REEFS AND REEF-BUILDING BIOTA. PALEOZOIC
Известия высших учебных заведений: Геология и разведка, 2020 This work analyses the development of reefs, which represent thick morphologically expressed carbonate massifs created by the activity of frame-forming organisms. Major stages in the development of reefs include the periods of Early Cambrian, Ordovician,
V. G. Kuznetsov
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Geochemical characteristics and genesis of Paleozoic natural gas in the Ordos Basin
Shiyou shiyan dizhi, 2023 The geochemical characteristics and genesis of Paleozoic natural gas in the Ordos Basin are complex, with some disputes on the gas source of Lower Paleozoic. In order to better grasp the overall geochemical characteristics and variation laws of Paleozoic
Furong LI +7 more
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Shiyou shiyan dizhi, 2020 The Wensu Uplift is an important structural belt in the northern Tarim Basin, NW China, always regarded as a thrust belt. However, this recognition is not only incompatible with the facts that synthetic and antithetic faults are equally developed in ...
Guangyu HE +7 more
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Paleozoic magmatism in the southwest of Julfa (northwestern Iran): geochemical characteristics, U-Pb dating and tectonic setting [PDF]
پترولوژی, 2019 Extensive sedimentary- igneous rock associations of Paleozoic age crop out in southwest of Julfa (northwest of Iran). Geochemically, the igneous rocks display various basic to acidic compositions.
morteza delavari +2 more
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Model of geological structure and prospects of petroleum bearing North Kara sedimentary basin [PDF]
Нефтегазовая геология: Теория и практика, 2023 Based on a comprehensive interpretation of seismic survey analyses and geological data on the islands and continental margin of Siberia, a model of the geological structure of the North Kara sedimentary basin is considered, and its seismostratigraphic ...
Kontorovich V.A. +5 more
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Geophysical Research Letters, 2022 A late Mesoproterozoic detrital zircon (DZ) age population, which was previously considered diagnostic of a link between the Lhasa terrane and northwest Australia, occurs in other Gondwanan components, thus obscuring the paleogeographic position of the ...
Wang Xu +4 more
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