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Florencia Moreno,Ana Mestre,Susana Heredia
Pág. 302 - 317
The calcareous microfossils present in the Ordovician and Silurian carbonate successions around the world are limited to few studies and their biological affinities and environmental preferences remain indefinite. In the carbonate Ordovician San Juan For...
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Wen Zhang, Wenhui Liu, Xiaofeng Wang, Zhengliang Huang, Qingfen Kong, Houyong Luo, Dongdong Zhang, Peng Liu, Xiaoyan Chen and Zhenghong Cai
Interactive depositional systems of marine carbonates and gypsum salt rocks are closely related to natural gas reservoirs. Despite continuous progress in the exploration of new areas of marine carbonate genesis within the Ordos Basin, the source and mech...
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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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Ana Mestre,Mercedes Gallardo,María José Salas,Susana Heredia
Pág. 423 - 444
The microfossil hosted in the strata of the upper part of the San Juan Formation has been widely studied in several sections to the northward of the Argentinian Central Precordillera. In contrast, the coeval strata at the Los Baños de Talacasto section, ...
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Wieslaw Trela, Ewa Krzeminska, Karol Jewula and Zbigniew Czupyt
This report provides oxygen isotopes from apatite of late Middle and Late Ordovician conodonts from the southern Holy Cross Mountains in south-eastern Poland. It was a unique time interval characterised by a significant change in the Ordovician climate, ...
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Davide Lenaz, Matteo Velicogna, Maurizio Petrelli and Birger Schmitz
In the Ordovician limestone of the Thorsberg quarry (South Sweden), about 130 meteorites have been found. Among the extraterrestrial material, several terrestrial Cr-spinels and zircons have been found too. In particular, in the interval 416?447 cm above...
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José Luis Carrasco,Hans Niemeyer
Pág. 577 - 591
The El León pluton, located in the Cordón de Lila in the Precordillera of the Antofagasta region, Chile, is an intrusive body emplaced in the famatinian magmatic arc in the southwestern margin of Gondwana during the Darriwilian (Middle Ordovician). It ha...
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Achim D. Herrmann, John T. Haynes, Richard M. Robinet and Norlene R. Emerson
Altered tephras (K-bentonites) are of great importance for calibration of the geologic time scale, for local, regional, and global correlations, and paleoenvironmental reconstructions. Thus, definitive identification of individual tephras is critical. Si...
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Zhan Zhao, Jingtao Liu, Wenlong Ding, Ruiqiang Yang and Gang Zhao
Fault damage zone has an important influence on subsurface fluid flow and petrophysical properties. Therefore, it is of great significance to study the characteristics of fault damage zone for oil and gas development of ultra-deep carbonate formation. Th...
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Matías J. Mango,Guillermo L. Albanesi
Pág. 577 - 598
This study deals with the conodont biostratigraphy from the uppermost part of La Silla Formation (9.6 m) and the overlying San Juan Formation (264.7 m), at the Cerro La Silla section, Central Precordillera of San Juan, Argentina. The 41 samples of carbon...
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