Results 61 to 70 of about 917 (192)

Identifying Framboidal Pyrrhotite: A Proxy for Hydrothermal Alteration of Organic‐Rich Sediments

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract Framboidal pyrrhotite, in sharp contrast to framboidal pyrite, has been rarely reported, and its formation remains poorly understood. Here we report its clear identification in a shale‐gas well core and explore its potential as a proxy for diagenesis or low‐grade metamorphism of organic‐rich sediments.
Y. Wang, D. Jia, A. R. Muxworthy, Y. Zhang, L. Qi, C. Z. Jia, L. Liu, N. Jiang   +7 more
wiley   +1 more source

Evaluation of Present Tectonic Stress Field and Permeability of Coalbed Methane Reservoirs by Inversion of Logging Data From Longtan Formation, Dahebian Block

Energy Science &Engineering, Volume 13, Issue 11, Page 5198-5217, November 2025.
ABSTRACT The permeability of coal reservoirs is predominantly controlled by the present tectonic stress field. This study systematically integrates macro‐ and micro‐scale analytical methods to investigate the controlling mechanisms of tectonic stress on pore‐fracture characteristics and permeability in the Longtan Formation coal reservoirs.
Guoqing He, Zhonghu Wu, Wenjibin Sun, Xianchao Yang, Jintao Zhou, Jun Yu, Baofeng Lan   +6 more
wiley   +1 more source

Tectonic genetic mechanisms of burnt rocks in the upper and middle reaches of the Yellow River basin

Meitian dizhi yu kantan
ObjectiveThe upper and middle reaches of the Yellow River basin represent significant coal bases of China, while burnt rocks formed by the high temperature of coal fires greatly affect the safe and green coal mining in this region.
Qiang SUN, Xin HU, Shuangming WANG, Xiaoying DING, Jishi GENG, Jiakun WU, Shaoni WEI, Donghai LUO   +7 more
doaj   +1 more source

Quantitative Provenance Analysis of the Yangtze and Yellow River Sediments Through Detrital Zircon U‐Pb Geochronology Using an XGBoost Machine Learning Algorithm

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 3, September 2025.
Abstract Over the past two decades, a large number of zircon U‐Pb ages from the Yangtze and Yellow River Basins have been published, yet distinguishing the sources of sediment between these regions remains challenging. Issues related to sampling, analytical methods, and biases complicate the interpretation of detrital zircon geochronology.
X. T. Huang, Y. L. Guo, P. Wang, S. V. Hohl, X. L. Zhao, Y. L. Li, S. Y. Yang   +6 more
wiley   +1 more source

Geological Characteristics and Metallogenic Regularity of Copper Deposits in Ningxia

Kuangchan zonghe liyong
This is an article in the field of earth sciences. The copper resources in Ningxia are relatively poor, and 15 copper producing areas have been basically identified, of which 6 deposits have been explored, and the accumulative amount of copper metal has ...
Maoxin LU, Liange XIANG, Hong WANG, Donggang WANG, Fenghua MA, Tong LI   +5 more
doaj   +1 more source

Stable Isotope Characteristics and Recharge Mechanisms of River, Lake and Groundwater by Precipitation in the Hulun Lake Basin

Hydrological Processes, Volume 39, Issue 6, June 2025.
Filling the gap in refined research on multimedia hydrological processes during wet seasons in a typical semi‐arid lake basin. The characteristics of δD and δ18O values of the precipitation, river water, lake water and groundwater and their relationships were elaborated, and the recharge rates were calculated among them by using the endmember element ...
Chen Du, Xiangzhen Kong, Dunping Sun, Yufei Xue, Can Zhang, Bin Xue   +5 more
wiley   +1 more source

Magmatic Intrusion during the Yanshanian Period and Multi-Mineral Enrichment Mechanisms in the Eastern Margin of the North China Craton

The mineralization within the North China Craton (NCC) is intricately linked to Mesozoic large-scale extension in eastern China and is a consequence of a unified geodynamic tectonic background.
Zengxue Li, Huaihong Wang, Yinan Liu, Yuzhen Zhu, Haiyan Liu, Dongdong Wang, Lijun Shen, Lusheng Yin   +7 more
core   +1 more source

Evaluation of Favorable Fracture Area of Deep Coal Reservoirs Using a Combination of Field Joint Observation and Paleostress Numerical Simulation: A Case Study in the Linxing Area

Energies
The development of fractures under multiple geological tectonic movements affects the occurrence and efficient production of free gas in deep coal reservoirs.
Shihu Zhao, Yanbin Wang, Yali Liu, Zengqin Liu, Xiang Wu, Xinjun Chen, Jiaqi Zhang   +6 more
doaj   +1 more source

GEOCHEMICAL CHARACTERISTICS OF TIANMENSHAN COMPOSITE PLUTON, SOUTH CHINA

Геодинамика и тектонофизика, 2017
The southern Jiangxi province is located at east Nanling range, which is an important W-Sn metallogenic province of China. The Early Yanshanian Tianmenshan is composed of the main-phase porphyritic biotite granite and the highly differentiated fine ...
Yanjiao Chen, Bin Chen, Xiaoxia Duan
doaj   +1 more source

Geological reassessment of syn‐rift extensional sequences in the Shine Usny Tolgod and Dzun Shakhai fossil localities, Eastern Gobi Basin, Mongolia

Sedimentology, Volume 72, Issue 4, Page 1275-1315, June 2025.
ABSTRACT Sedimentary infill patterns in the Eastern Gobi Basin of southern Mongolia record a complex, polyphased history. Asynchronous timing and intensities of extensional tectonism during the Early Cretaceous fragmented the Eastern Gobi Basin into a series of sub‐basins within an extensional rift (horst‐graben) setting, which likely infilled ...
Jesse Benjamin van Niekerk, Ryan T. Tucker, Puntsag Delgerzaya, William J. Freimuth, Tsogtbaatar Chinzorig, Khishigjav Tsogtbaatar, Junki Yoshida, Lindsay E. Zanno   +7 more
wiley   +1 more source