Results 31 to 40 of about 799 (197)

Silicic ash beds bracket Emeishan Large Igneous Province to < 1 m.y. at ~ 260 Ma [PDF]

open access: yes, 2016
This research was supported by the Open Fund (PLC201404) of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), the National Natural Science Foundation of China (41502109), Project funded by China ...
Cawood, Peter A.   +7 more
core   +1 more source

Geochemistry of Picritic and Associated Basalt Flows of the Western Emeishan Flood Basalt Province, China [PDF]

open access: yesJournal of Petrology, 2006
Picritic lava flows near Lijiang in the late Permian Emeishan flood basalt province are associated with augite-phyric basalt, aphyric basalt, and basaltic pyroclastic units. The dominant phenocryst in the picritic flows is Mg-rich olivine (up to 91.6% forsterite component) with high CaO contents (to 0.42 wt %) and glass inclusions, indicating that the ...
openaire   +1 more source

The Application of Alizarin Red S in the Fluid-inclusion Homogenization Temperature Measurement of Carbonate Rocks from the Middle Permian Qixia Formation, Western Sichuan Basin

open access: yesYankuang ceshi, 2015
The accurate identification of host mineral and the formation stage of fluid inclusions are critical to temperature measurement, and the combination of inclusion technology and other technologies could be better to figure out the source and properties ...
LAN Ye-fang   +4 more
doaj   +1 more source

Contrasting geochemical signatures on land from the Middle and Late Permian extinction events [PDF]

open access: yes, 2014
The end of the Palaeozoic is marked by two mass‐extinction events during the Middle Permian (Capitanian) and the Late Permian (Changhsingian). Given similarities between the two events in geochemical signatures, such as large magnitude negative δ 13 C ...
Chakrabarti, Ramananda   +3 more
core   +1 more source

SHRIMP zircon U–Pb ages from coal beds across the Permian–Triassic boundary, eastern Yunnan, southwestern China [PDF]

open access: yes, 2018
The first SHRIMP zircon U–Pb ages from coal beds close to the end-Permian mass extinction are reported from the C1 coal seam in the Yantang Mine in Laibin Town, Xuanwei County, eastern Yunnan Province.
Black   +41 more
core   +3 more sources

High-MgO lavas associated to CFB as indicators of plume-related thermochemical effects: the case of ultra-titaniferous picrite-basalt from the Northern Ethiopian-Yemeni plateau [PDF]

open access: yes
A comprehensive petrological and geochemical dataset is reported in order to define the thermo-compositional characteristics of Ti (Fe)-enriched picrite-basalt lavas (HT2, TiO2 3-7 wt%), erupted close to the axial zone of the inferred Afar mantle plume ...
Beccaluva, Luigi   +6 more
core   +1 more source

Non-seismic geophysical prospecting model of Beiya gold mine in Western Yunnan Province [PDF]

open access: yes, 2017
According to the basic rules and characteristics of the gold-polymetallic deposits of Beiya gold mine area in terms of mineralization and ore controlling, it is concluded that skarn deposit is the main ore deposit type in this area and the geological ...
Guo, Jing   +4 more
core   +1 more source

Origin of two types of rhyolites in the Tarim Large Igneous Province: Consequences of incubation and melting of a mantle plume [PDF]

open access: yes, 2014
The Early Permian Tarim Large Igneous Province (LIP) in northwestern China contains a large area of silicic volcanics (similar to 48,000 km(2)) which are spatially and temporally associated with mafic-ultramafic rocks. In order to understand the behavior
Li, Xian-Hua   +8 more
core   +1 more source

An abrupt extinction in the Middle Permian (Capitanian) of the Boreal Realm (Spitsbergen) and its link to anoxia and acidification [PDF]

open access: yes, 2015
The controversial Capitanian (Middle Permian, 262 Ma) extinction event is only known from equatorial latitudes, and consequently its global extent is poorly resolved.
Beauchamp, Benoit   +7 more
core   +2 more sources

Sudden changes in fluvial style across the Permian / Triassic boundary in the eastern Iberian Ranges, Spain: Analysis of possible causes [PDF]

open access: yes, 2005
The sedimentary record of the Late Permian and Early Triassic of the eastern Iberian Ranges shows four major, sudden, or very rapid, vertical changes in fluvial style.
Alexander   +121 more
core   +1 more source

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