Results 11 to 20 of about 623,919 (404)

Post-eruptive mobility of lithium in volcanic rocks. [PDF]

open access: yesNat Commun, 2018
To reflect magmatic conditions, volcanic rocks must retain their compositions through eruption and post-eruptive cooling. Mostly, this is the case. However, welded ignimbrites from the Yellowstone–Snake River Plain magmatic province reveal systematic ...
Ellis BS   +7 more
europepmc   +2 more sources

The mechanical behaviour and failure modes of volcanic rocks: a review

open access: yesBulletin of Volcanology, 2021
The microstructure and mineralogy of volcanic rocks is varied and complex, and their mechanical behaviour is similarly varied and complex. This review summarises recent developments in our understanding of the mechanical behaviour and failure modes of ...
M. Heap, M. Violay
semanticscholar   +1 more source

Huronian Volcanic Rocks [PDF]

open access: yesGeological Magazine, 1877
H. A. Nicholson
openaire   +2 more sources

Geology, petrography, alteration, and geochemistry of the Shahrab igneous rock, Central Iran

open access: yesGeology, Ecology, and Landscapes, 2021
Eocene to Quaternary calc-alkaline volcanic and intrusive rocks are exposed in Shahrab area in the Urumieh-Dokhtar magmatic belt in the Central Iran structural zone.
Kaveh Pazand   +2 more
doaj   +1 more source

Controlling factors of volcanic hydrocarbon reservoirs in Bohai Bay Basin, China

open access: yesJournal of Natural Gas Geoscience, 2017
Volcanic hydrocarbon reservoirs are developed in the Mesozoic and Cenozoic strata in Bohai Bay Basin in China. There is more than one hundred million tons of proven oil reserves in the said reservoir.
Chun Yang   +4 more
doaj   +1 more source

Volcanism in The Pre-Semilir Formation at Giriloyo Region; Allegedly as Source of Kebo-Butak Formation in the Western Southern Mountains

open access: yesJGEET: Journal of Geoscience, Engineering, Environment and Technology, 2019
Kebo-Butak Formation was known to be the oldest volcanic rocks limited in regional terms in the lower Baturagung Hills, Gedangsari area, Gunungkidul Regency.
Sri Mulyaningsih   +3 more
doaj   +1 more source

Geological and chronological characteristics of the Baiyin'gaolao Formation in Gaoyaowula, Inner Mongolia

open access: yesDizhi lixue xuebao, 2021
Based on a regional geological survey at a scale of 1:50000, it reveals that the volcanic rocks from the Baiyin'gaolao Formation of Gaoyaowula in Inner Mongolia could be divided into three lithologic segments by the triple mapping method of "volcanic ...
DONG Peipei   +5 more
doaj   +1 more source

Cenozoic volcanic rocks in the Pearl River Mouth and Southeast Hainan Basins of South China Sea and their implications for petroleum geology

open access: yesPetroleum Exploration and Development, 2013
Drilling, gravity, magnetic observation and seismic facies are combined to identify the Cenozoic volcanic rocks in the Pearl River Mouth Basin and the Southeast Hainan Basin in the northern South China Sea, and to analyze how their lithology ...
Bin ZHANG   +5 more
doaj   +1 more source

Relationship between Permian volcanic rocks distribution and karst paleogeomorphology of Maokou Formation and its significance for petroleum exploration in western Sichuan Basin, SW China

open access: yesPetroleum Exploration and Development, 2021
Based on outcrop, drilling, logging, geochemical analysis and seismic data, the karst landform and distribution of Permian volcanic rocks at the end of the sedimentary period of the Maokou Formation in the western Sichuan Basin are examined, and their ...
Ran LIU   +7 more
doaj   +1 more source

Geological features and evaluation techniques of deep-seated volcanics gas reservoirs, Songliao Basin

open access: yesPetroleum Exploration and Development, 2008
: The significant breakthrough of natural gas exploration in deep-seated volcanic rocks of Songliao Basin, China, demonstrates that the volcanic rocks as reservoirs can form natural gas accumulations where excellent source–reservoir–caprock assemblages ...
Wen-zhi ZHAO   +8 more
doaj   +1 more source

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