Results 1 to 10 of about 7,465 (258)

Depositional environment of shale in Wufeng and Longmaxi Formations, Sichuan Basin

Petroleum Research, 2017
Formation of organic-rich shale was controlled by depositional processes and environment condition. According to petrology, mineralogy, fossil composition and sedimentary structure, seven lithofacies of shale were identified in the Wufeng Formation to ...
Jianhua Zhao, Zhijun Jin, Zhenkui Jin, Xin Wen, Yikai Geng, Caina Yan, Haikuan Nie   +6 more
doaj   +3 more sources

The impact of depositional environment and tectonic evolution on coalbed methane occurrence in West Henan, China

International Journal of Mining Science and Technology, 2019
A deeper understanding of the mechanisms by which geological factors (depositional environment and tectonic evolution) control the occurrence of coalbed methane (CBM) is important for the utilization of CBM resources via surface-drilled wells and the ...
Zhaodan Cao, Baiquan Lin, Ting Liu
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Mineralogical and elemental geochemical characteristics of Taodonggou Group mudstone in the Taibei Sag, Turpan–Hami Basin: implication for its formation mechanism [PDF]

Solid Earth, 2023
Organic matter types in the Taodonggou Group mudstone exhibit significant differences with depth. In order to understand the formation mechanism of this special phenomenon, we analyzed the mineralogy and geochemistry of the mudstone, as well as the ...
H. Miao, H. Miao, J. Guo, Y. Wang, Z. Jiang, Z. Jiang, C. Zhang, C. Zhang, C. Li, C. Li   +9 more
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Content and distribution of mercury in coal and its relation to depositional environment—A case study on coals from the Shanxi Formation in Huainan Coalfield

Frontiers in Earth Science, 2023
Mercury in coals might emit into the environment from coal combination, and finally cause environmental pollution. In this paper, 26 coal samples were selected from No.
Liugen Zheng, Liugen Zheng, Liqun Zhang, Liqun Zhang, Yunlong Wang, Yunlong Wang, Yeyu Chen, Yeyu Chen, Yongchun Chen, Shikai An, Yanfei Xu   +10 more
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Sequence stratigraphy of the Middle Jurassic Yan’an Formation (NE Ordos Basin, China), relationship with climate conditions and basin evolution, and coal maceral’s characteristics

Frontiers in Earth Science, 2023
The Yan’an Formation of the Ordos Basin in North China is among the largest and most extensively studied Jurassic coal reservoirs in the world. The lacustrine Yan’an Formation was investigated near Dongsheng (Ordos Basin, China) in its sequence ...
Dawei Lv, Dawei Lv, Yangyang Shen, A. J. Tom van Loon, Munira Raji, Zhihui Zhang, Guangzeng Song, Zhouhe Ren, Yujia Wang, Dongdong Wang   +9 more
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Sedimentary Facies and Palynological Studies of Ajali Sandstones Formation Outcropping in Idah, Northern Anambra Basin, Nigeria

Journal of Applied Sciences and Environmental Management, 2023
The paleo-depositional environment of the Maastrichtian Ajali Sandstone Formation of the Anambra Basin has remained controversial as numerous studies have inferred differing origins of the sedimentary unit. This study presents analytical evidence on the
T. S. Alege, T. O. Tella, G. O. Aigbadon, J. I. Omada   +3 more
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LARGE FORAMINIFERA FROM LIMESTONE IN THE RAJAMANDALA FORMATION, SUKABUMI, WEST JAVA [PDF]

Malaysian Journal of Geosciences, 2021
Rajamandala Formation is a limestone reef formation that is exposed in the Rajamandala – Sukabumi area, West Java. Different from those in the Rajamandala area, this formation which is located in the Sukabumi area is still rarely analyzed, especially ...
Rizki Satria Rachman, Winantris
doaj   +1 more source

Study on the Mineralogical and Geochemical Characteristics of Arsenic in Permian Coals: Focusing on the Coalfields of Shanxi Formation in Northern China

Energies, 2022
The Huainan Coalfield is a typical multi-coal seam coalfield. In order to systematically investigate the distribution, occurrence, and integration of arsenic (As) in Shanxi coal, 26 coal samples and three rock samples were collected in the No.
Liqun Zhang, Liugen Zheng, Meng Liu
doaj   +1 more source

Relationship between depositional environments and preservabilities of Holocene tsunami deposits on the Hidaka coast, Hokkaido, Japan

Quaternary Science Advances, 2023
Rising sea levels and associated coastal topography changes are expected to increase coastal vulnerability to tsunamis. Reliable records of the periodicity of the most damaging tsunamis, with recurrence intervals of several centuries, are often ...
Ryo Nakanishi, Juichiro Ashi, Yosuke Miyairi, Yusuke Yokoyama   +3 more
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Barrier coastal depositional system and its characteristics in Xihu Sag, East China Sea Shelf Basin: A case study of lower Pinghu Formation in Pingbei area [PDF]

Youqicang pingjia yu kaifa
The Xihu Sag is a hydrocarbon-rich sag with high oil and gas exploration value in East China Sea Shelf Basin. In recent years, continuous breakthroughs have been achieved in the exploration efforts of the Eocene Pinghu Formation of Xihu Sag, making it an
YIN Guofeng, ZHAO Yong
doaj   +3 more sources