Results 21 to 30 of about 424,073 (293)

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

Petroleum 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, Bing LUO, Ya LI, Nansheng QIU, Wei WANG, Yu ZHANG, Qinglin HE, Senqi PEI   +7 more
doaj   +1 more source

Volcanic Rocks in the Keewatin [PDF]

Science, 1894
n ...
openaire   +2 more sources

The Microbial Habitability of Weathered Volcanic Glass Inferred from Continuous Sensing Techniques [PDF]

, 2011
Basaltic glasses (hyaloclastite) are a widespread habitat for life in volcanic environments, yet their interior physical conditions are poorly characterized.
Bagshaw, Elizabeth A., Wadham, Jemma L., Venugopalan, T., Matt Mowlem, Cockell, C. S., Jemma L. Wadham, Bagshaw, Elizabeth, Magan, N., Tong Sun, Elizabeth A. Bagshaw, Croxford, Anthony J., Mowlem, M., Cockell, Charles S., Bagshaw, EA, Charles S. Cockell, Naresh Magan, Wadham, JL, T. Venugopalan, Anthony J. Croxford, Sun, Tong, Mowlem, Matt, Sun, T., Magan, Naresh, Croxford, AJ   +23 more
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Characteristics of Permian volcanism in the western Sichuan Basin and its natural gas exploration potential

Natural Gas Industry B, 2019
It was previously deemed that volcanic rocks in the western Sichuan Basin were not developed, which restricted the exploration of volcanic gas reservoirs in this area.
Jianlin Lu, Zongxin Zuo, Zheng Shi, Xia Dong, Qingjie Wu, Xiaobo Song   +5 more
doaj   +1 more source

Grain-size distribution of volcaniclastic rocks 1: A new technique based on functional stereology [PDF]

, 2012
The power of explosive volcanic eruptions is reflected in the grain size distribution and dispersal of their pyroclastic deposits. Grain size also forms part of lithofacies characteristics that are necessary to determine transport and depositional ...
Proussevitch, A.A., Allen, S. R., Jutzeler, M., Allen, Sharon R., Jutzeler, Martin, Prusevich, Alexander A., Allen, S.R., Proussevitch, Alex A.   +7 more
core   +1 more source

Isotopic Age of the Xiong’er Group Volcanic Rocks and Its Geological Significance in Western Henan, China

Geofluids, 2022
The Xiong’er Group is mainly distributed in western Henan, southern Shanxi, and southeastern Shaanxi. As a set of low-grade metamorphic and low-deformation volcanic rocks formed in the transition period during the tectonic evolution of the North China ...
Wenchao Dong, Xucheng Pang, Weixun Qu, Guangshun Hou   +3 more
doaj   +1 more source

A Comparative Study on Microscopic Characteristics of Volcanic Reservoirs in the Carboniferous Kalagang and Haerjiawu Formations in the Santanghu Basin, China

Frontiers in Earth Science, 2021
Self-jetting high-yield oil flow was obtained from Ma 67 and Ma 36 wells drilled in the volcanic reservoirs of the Haerjiawu Formation in the Santanghu Basin, China. This has shifted the prospectors’ attention to the Haerjiawu Formation from the Kalagang
Weiming Wang, Weihao La, Tanguang Fan, Xiongfei Xu, Yingnan Liu, Qixia Lv   +5 more
doaj   +1 more source

Petrological and Geochemical Constraints on the Origin of Early Cretaceous Volcanic Rocks in the Central‐East Asia: Implications for Crustal Growth and Evolution

Geochemistry, Geophysics, Geosystems, 2018
New petrological and geochemical data for Early Cretaceous volcanic rocks in the North China Craton (NCC) combined with published data of cotemporaneous volcanic rocks in the NCC and eastern Central Asian Orogenic Belt (ECAOB) are used to understand ...
Sheng‐Ping Qian, Zhong‐Yuan Ren, Le Zhang, Lei Zhang, Ya‐Dong Wu, Sheng‐Wang Mei, Xiao‐Bo Xu, Qing‐Chen Luo   +7 more
doaj   +1 more source

Constraints on Early Paleozoic Deep‐Ocean Oxygen Concentrations From the Iron Geochemistry of the Bay of Islands Ophiolite

Geochemistry, Geophysics, Geosystems, 2022
The deep ocean is generally considered to have changed from anoxic in the Precambrian to oxygenated by the Late Paleozoic (∼420–400 Ma) due to changes in atmospheric oxygen concentrations.
Daniel A. Stolper, Xiaofei Pu, Max K. Lloyd, Nikolas I. Christensen, Claire E. Bucholz, Rebecca A. Lange   +5 more
doaj   +1 more source

Pyroclastic deposits and volcanic history of Mayor Island [PDF]

, 1981
The emergent summit of Mayor Island, Bay of Plenty, New Zealand, is a peralkaline rhyolite volcano constructed by: a sequence of lava flows, the Tutaretare Rhyolite Formation(new); and pyroclastic deposits, the Oira Pyroclastite Formation (new).
Nelson, Campbell S., Briggs, Roger M., Buck, M.D.   +2 more
core   +1 more source