Results 21 to 30 of about 40,268 (264)

Geological significance of paleo-aulacogen and exploration potential of reef flat gas reservoirs in the Western Sichuan Depression

open access: yesNatural Gas Industry B, 2015
Confirming thick hydrocarbon generation center and discovering thick porous reservoirs are two key factors to start the Permian gas exploration of the Western Sichuan Depression.
Shu Liu, Meng Ning, Gangping Xie
doaj   +1 more source

Permian and Triassic Paleogeography of the Eastern Klamath Arc and Eastern Hayfork Subduction Complex, Klamath Mountains, California: Evidence from Lithotectonic Associations and Detrital Zircon [PDF]

open access: yes, 1991
Middle Permian and Middle Triassic volcanic-hypabyssal intrusive complexes form ensimatic arc deposits in the eastern Klamath terrane. Sedimentary matrix melange with blocks of sandstone, chert, and Tethyan fauna-bearing limestone compose the westward-
Miller, M. Meghan, Saleeby, Jason
core   +1 more source

Significance of new breakthrough in and favorable targets of gas exploration in the Middle Permian system, Sichuan Basin

open access: yesNatural Gas Industry B, 2015
The Middle Permian system in the Sichuan Basin represents favorable conditions for the formation of natural gas reservoirs. However, only fracture-vuggy limestone gas reservoirs were discovered in early exploration, whose scales and results were limited.
Ping Shen   +7 more
doaj   +1 more source

Sequence stratigraphy, paleogeography, and coal accumulation regularity of major coal-accumulating periods in China

open access: yesInternational Journal of Coal Science & Technology, 2020
There are 9 major coal-accumulating periods during geological history in China, including the Early Carboniferous, Late Carboniferous-Early Permian, Middle Permian, Late Permian, Late Triassic, Early-Middle Jurassic, Early Cretaceous, Paleogene and ...
Longyi Shao   +13 more
doaj   +1 more source

Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin

open access: yesNatural Gas Industry B, 2015
The exploration direction and targets for the large-scale Middle Permian gas reservoirs in the Sichuan Basin are hot spots and challenges in current exploration researches.
Guoming Xu   +3 more
doaj   +1 more source

Decoupling of morphological disparity and taxic diversity during the adaptive radiation of anomodont therapsids [PDF]

open access: yes, 2013
Adaptive radiations are central to macroevolutionary theory. Whether triggered by acquisition of new traits or ecological opportunities arising from mass extinctions, it is debated whether adaptive radiations are marked by initial expansion of taxic ...
Anderson MJ   +7 more
core   +1 more source

Tectonic relationship between the Kelameili range and the Dajing depression: Insights into the Carboniferous tectonic-sedimentary framework

open access: yesPetroleum Exploration and Development, 2020
Based on comprehensive analysis of typical outcrops, latest deep wells drilled and high resolution seismic profiles in the study area, we examined the geologic structure of the Kelameili range, and analyzed the structural relationship between the ...
Lei ZHANG, Dengfa HE, Zejun YI, Di LI
doaj   +1 more source

Changes in the shell ornamentation of conchostracans (Phyllopoda, Spinicaudata) at the Permian–Triassic boundary: Case studies from Eastern Europe, Kuznetsk basin, and Verkhoyansk Region

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2022
This article sums up the results of our study on shell ornamentation of 13 conchostracan species. Their fossil remains were sampled from the Middle and Upper Permian, Induan, and Olenekian (Lower Triassic) deposits of different zoogeographical provinces.
V.V. Zharinova, V.V. Silantiev
doaj   +1 more source

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

open access: yes, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan   +6 more
core   +1 more source

Sedimentology and geochemistry of Middle–Upper Permian in northwestern Turpan–Hami Basin, China: Implication for depositional environments and petroleum geology

open access: yesEnergy Exploration & Exploitation, 2018
Studies have found that the Permian is another important stratum for petroleum exploration except the Jurassic coal measures within Turpan–Hami Basin recently.
Jian Song   +15 more
doaj   +1 more source

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