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Published on Feb 1, 2014in Acta Geologica Sinica-english Edition
Berna Yavuz Pehlivanli1
Estimated H-index: 1
,
Çükrü Koç1
Estimated H-index: 1
(Ankara University)
+ 1 AuthorsHilal Engin1
Estimated H-index: 1
(Ankara University)
In this study uranium and thorium contents and depositional characteristics of Cayirhan bituminous shales (CBS), west of Ankara (central Anatolia), are investigated. Samples used were collected from boreholes opened by Park Holding Ltd. A total of 25 samples were taken from bituminous shale levels in boreholes drilled at 6 different locations in the study area. The Hirka formation which hosts bituminous shale deposits is a volcano sedimentary sequence and all lithofacies indicate that a lacustri...
Published on Jan 1, 2011in International Journal of Coal Geology5.33
Xiugen Fu13
Estimated H-index: 13
,
Jian Wang14
Estimated H-index: 14
+ 2 AuthorsXinglei Feng10
Estimated H-index: 10
Abstract The Bilong Co oil shale zone is located in the South Qiangtang depression. This zone, together with the Shengli River-Changshe Mountain oil shale zone in the North Qiangtang depression, northern Tibet plateau, represents a potentially large marine oil shale resource in China. With the aim of better understanding geochemistry of marine oil shale, 18 samples from the Bilong Co area are studied and 56 elements in them are determined. The contents of Mo, Se, Cd, Cs, As, Bi, U Rb, Pb, Th, Li...
Published on Apr 1, 2009in International Journal of Coal Geology5.33
M.P. Ketris6
Estimated H-index: 6
(RAS: Russian Academy of Sciences),
Ya. E. Yudovich8
Estimated H-index: 8
(RAS: Russian Academy of Sciences)
Abstract Black shale and coal Clarke values are the average trace element contents in the World black shales and coals. These calculations are made in Russian geochemistry but up to now are poorly known in the West. Modern tables of black shale and coal Clarkes are presented, based on comprehensive calculations using very large amount of information (thousands analyses of black shales, coals, and coal ashes for trace elements). In black shale geochemistry, three figures were calculated for each ...
Published on Dec 1, 2008in International Journal of Coal Geology5.33
Wenfeng Wang11
Estimated H-index: 11
(CUMT: China University of Mining and Technology),
Yong Qin17
Estimated H-index: 17
(CUMT: China University of Mining and Technology)
+ 3 AuthorsDominik J. Weiss44
Estimated H-index: 44
(Imperial College London)
Twenty-six samples including roof, bottom and coal plies of a marine influenced coal bed were collected from the Antaibao mining district, Shanxi, China. The rare earth elements (REEs) were determined in solids and organic solvent extracts. The distribution pattern showed three distinct patterns: shale-like, LREE-rich and HREE-rich. This is attributed to the variable microenvironment of peat-forming swamp, the degree of marine influences and different REE sources. REEs in the coal are mainly con...
Published on May 1, 2008in International Journal of Coal Geology5.33
Shifeng Dai49
Estimated H-index: 49
(CUMT: China University of Mining and Technology),
Dan Li3
Estimated H-index: 3
(CUMT: China University of Mining and Technology)
+ 5 AuthorsYingying Sun3
Estimated H-index: 3
(CUMT: China University of Mining and Technology)
Abstract Boehmite-rich coal of Pennsylvanian age was discovered earlier at the Heidaigou Surface Mine, Jungar Coalfield, Inner Mongolia, China. This paper reports new results on 29 bench samples of the no. 6 coal from a drill core from the adjacent Haerwusu Surface Mine, and provides new insights into the origin of the minerals and elements present. The results show that the proportion of inertinite in the no. 6 coal is higher than in other Late Paleozoic coals in northern China. Based on minera...
Published on Jan 1, 2008in Revista Mexicana De Ciencias Geologicas1.04
Mahdi Jafarzadeh1
Estimated H-index: 1
(Shahid Beheshti University),
Mahboobeh Hosseini-Barzi1
Estimated H-index: 1
(Shahid Beheshti University)
An integrated petrographic and geochemical study of the Ahwaz Sandstone Member of OligoceneMiocene age, Asmari Formation in Zagros, southwest Iran, was carried out to infer their provenance and tectonic setting. This study is based on the analysis of core samples from three subsurface sections (wells Az-85, Az-11, and Az-89) in Ahwaz oil fi eld in the Dezful embayment subzone. On the basis of the framework composition (point counting) and whole-rock geochemistry (major elements), the sandstones ...
Published on Jul 1, 2007in International Journal of Coal Geology5.33
Hua-Wen Qi9
Estimated H-index: 9
(CAS: Chinese Academy of Sciences),
Ruizhong Hu36
Estimated H-index: 36
(CAS: Chinese Academy of Sciences),
Qi Zhang2
Estimated H-index: 2
(CAS: Chinese Academy of Sciences)
Abstract The Wulantuga Germanium Deposit (WGD), hosted in coal seams with Ge resources up to 1600 Mt, is located in the Shengli Coalfield in Xilingol, Inner Mongolia, China. Forty-two channel samples of Ge-bearing lignites of the No. 6-1 coal seam (Lower Cretaceous Bayanhua Formation) were collected and their REE compositions were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). The modes of occurrence of REE in selected lignite samples were studied by scanning electron microsc...
Published on Apr 1, 2007in Journal of South American Earth Sciences1.66
N.O. Campos Alvarez1
Estimated H-index: 1
(Shimane University),
Barry Roser14
Estimated H-index: 14
(Shimane University)
Abstract The major and trace element characteristics of black shales from the Lower Cretaceous Paja Formation of Colombia are broadly comparable with those of the average upper continental crust. Among the exceptions are marked enrichments in V, Cr, and Ni. These enrichments are associated with high organic carbon contents. CaO and Na 2 O are strongly depleted, leading to high values for both the Chemical Index of Alteration (77–96) and the Plagioclase Index of Alteration (86–99), which indicate...
Published on Mar 1, 2006in Palaeogeography, Palaeoclimatology, Palaeoecology2.62
Hans-J. Brumsack5
Estimated H-index: 5
Organic carbon-rich sediments are enriched in several redox-sensitive and stable sulfide-forming trace metals (TM) and form an important sink in global TM cycles. In today's ocean such sediments are deposited in coastal upwelling areas like those in the Gulf of California, off Peru or off the Namibian coast and euxinic basins like the Black Sea. In an attempt to distinguish both environments by their specific TM patterns, some important conclusions may be drawn: 1) The TM enrichment seen in both...
Published on Jun 1, 2005in Australian Journal of Earth Sciences1.28
Franco Pirajno48
Estimated H-index: 48
,
M.J. Van Kranendonk12
Estimated H-index: 12
A review of hydrothermal processes and systems on Earth shows how they provide the environment for both the formation of ore deposits and for life on the modern through to the ancient Earth. We discuss submarine hydrothermal systems, subaerial volcanic and subvolcanic systems (low and high sulfidation), hydrothermal systems in the East African rifts and those of the Red Sea. Geothermal springs in both modern and ancient Earth exemplify the links between hydrothermal systems and life. Examples ar...
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