Results 271 to 280 of about 5,732,959 (308)

Geochemical characteristics of Greek thermal springs

Journal of Volcanology and Geothermal Research, 1989
Abstract A systematic sampling of all known thermal springs and gas emissions of continental Greece has been carried out. The main gas and water composition, and some trace elements in liquid phase (SiO 2 , H 3 BO 3 , NH 4 + and Li + ) have been determined.
Angelo Minissale, Vittorio Duchi, Niko Kolios, Giovanni Totaro   +3 more
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Organic geochemical characteristics of Bulgarian jet

International Journal of Coal Geology, 2017
Abstract The paper presents the results of the organic geochemical studies of Bulgarian jet samples of early Jurassic and early Cretaceous age from two deposits located within the Moesian platform and the Balkan tectonic zone. Total organic carbon contents (71 and 78% daf) indicate sub-bituminous coalification rank.
K. Markova, A. Zdravkov, A. Bechtel, M. Stefanova   +3 more
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Geochemical characteristics of biogenic gases in China

International Journal of Coal Geology, 2013
Abstract A number of contributions have demonstrated that the stable carbon and hydrogen isotopic compositions together with molecular compositions have a great significance on determination for gas origin and gas generation pathways of biogenic gases.
Yunyan Ni, Jinxing Dai, Caineng Zou, Fengrong Liao, Yanhua Shuai, Ying Zhang   +5 more
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Geochemical characteristics of oils from Taiwan

Journal of Southeast Asian Earth Sciences, 1994
Abstract Geochemical studies on a number of oils from Taiwan have shown that they are sourced predominantly from terrigenous organic matter. Biomarker characteristics include the presence of high amounts of long-chain regular isoprenoids, bicyclic sesquiterpanes, diterpanes, low concentrations or absence of tricyclic terpanes, presence of several C ...
J.-N. Oung, R.P. Philp
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Organic geochemical characteristics of coal biogasification

Fuel, 2022
kuo Jian, Xuehai Fu, Zhaoying Chen, Mi Li, Xiangqian Xu, Yuanyuan Guo, Jian Liu, Mingjie Liu   +7 more
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Geochemical characteristics of Precambrian basaltic greenstones

1990
One of the most fundamental questions concerning early Precambrian basic magmas is whether or not they are geochemically the same as those produced in equivalent tectonic settings at the present day. However, the geochemical classification of ancient basic igneous suites on the basis of inferred tectonic setting, and the interpretation of ancient ...
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The geochemical characteristics of marine volcanic rock

Journal of Central South University of Technology, 1996
The geochemical characteristics of keratophyre-spilite series in Kunyang Rift Valley at Yunnan are studied, including main chemical composition, trace element, REE distribution, and alkalinity. The study shows that its geochemical characteristics have close relations with copper and iron deposit.
Xihua Chen, Yiqi Zhao, Lihua Xie
openaire   +1 more source

Geochemical characteristics of the Daruvar thermal aquifer

2014
Thermal waters from Daruvar thermal aquifer have been subject to physical-chemical, chemical and stable isotope analyses and geochemical modeling to obtain the information about water origin and mixing and the results have been presented.
Borović, Staša, Larva, Ozren, Marković, Tamara   +2 more
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Geochemical Characteristics of the Nigerian anorogenic province

Geological Journal, 1987
The anorogenic granitoids of Nigeria are classic examples of ring complexes associated with migrating mid-plate magmatism. Most complexes represent eroded calderas of once active volcanoes, and range from 1 to 30 km in diameter. Petrology varies from peraluminous biotite granite, through hypersthene and fayalite granites to peralkaline aegirine ...
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Geochemical characteristics of PM2

2013
Weiwei Lv, Yanxin Wang, Xavier Querol
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