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Yiqing Wang, Yaohui Xu, Junping Huang, Jianglong Shi, Heng Zhao, Qingtao Wang and Qiang Meng
The hydrocarbon source rocks of the marine carbonates of the Ordovician Majiagou Formation in the Ordos Basin are generally in the high-overmature stage and are, therefore, not suitable for hydrocarbon thermal simulation experiments. Their hydrocarbon ge...
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Qiyang Zhang, Entao Liu, Songqi Pan, Hua Wang, Zhenhua Jing, Zhengfu Zhao and Ruiyue Zhu
Studying the accumulation rules of organic matter (OM) in paleo-ocean sediments can not only enhance our understanding of how OM becomes enriched in ancient oceans but also provide guidance for the exploration of shale gas in unconventional shale strata....
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Zakarya Yajioui, Helena Sant?Ovaia, Brahim Karaoui, Cláudia Cruz, Amar Karaoui, Abdelkader Mahmoudi, Hmidou El Ouardi and Lakhlifi Badra
The Ediacaran?Cambrian rocks on the northeastern edge of the Saghro inlier experienced polycyclic tectono-thermal events, which are reported here based on a multiscale structural analysis, from field measurements to fluid inclusion planes. Three striking...
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Yanan Miao, Pengfei Wang, Xin Li, Haiping Huang, Can Jin and Wei Gao
Shale gas production is obviously higher within the Silurian Longmaxi Formation than that of the Cambrian Niutitang Formation according to the drilling test results in the northwest Hunan area. To clarify the reasons behind this variation, core samples f...
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Sile Wei, Mingyi Hu, Sheng He, Wei Yang, Qing He, Quansheng Cai and Ping Li
The vertical geochemical variations in total organic carbon (TOC) content and major and trace elements of the Lower Cambrian Shuijingtuo Formation from the Yichang Slope in the Upper Yangtze were investigated to assess the environmental conditions (redox...
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Michael A. Pointon, Helen Smyth, Jenny E. Omma, Andrew C. Morton, Simon Schneider, Peter Hülse, Stephen J. Rippington, Berta Lopez-Mir, Quentin G. Crowley, Ian Millar, Martin J. Whitehouse, Dirk Frei, Robert A. Scott and Michael J. Flowerdew
A multi-proxy provenance study of Late Carboniferous to Middle Jurassic sandstones from the eastern Sverdrup Basin was undertaken employing optical petrography and heavy mineral analysis, chemical analysis of apatite, garnet and rutile grains, as well as...
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Enrico Capezzuoli, Amalia Spina, Andrea Brogi, Domenico Liotta, Gabriella Bagnoli, Martina Zucchi, Giancarlo Molli and Renzo Regoli
The Pre-Mesozoic units exposed in the inner Northern Apennines mostly consist of Pennsylvanian-Permian successions unconformably deposited on a continental crust consolidated at the end of the Variscan orogenic cycle (Silurian-Carboniferous). In the inne...
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María José J. Espeche,Raúl Lira,Nicolás A. Viñas
Pág. 14 - 45
On-going mining operations in a marble quarry (Cantera Centro) from Malagueño, Sierra Chica de Córdoba, Argentina, have unearthed veins, veinlets and lenses of sulfides (pyrrhotite>pyrite?chalcopyrite>>sphalerite). These veins and lenses are up ...
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Hans Niemeyer Rubilar
Pág. 628 - 640
An Upper Cambrian-Ordovician (490-460 Ma) batholith crop out along the Cordón de Lila and Sierra de Almeida, in the Antofagasta region, northern Chile, which belongs to the Famatinian arc. Two plutonic rock types can be distinguished: granodiorites and m...
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Mark A. S. McMenamin
Deuterostomes make a sudden appearance in the fossil record during the early Cambrian. Two bilaterian groups, the chordates and the vetulicolians, are of particular interest for understanding early deuterostome evolution, and the main objective of this r...
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