Results 41 to 50 of about 1,794 (218)

Chaotic breccia zones on the Pembroke Peninsula, south Wales: Evidence for collapse into voids along dilational faults [PDF]

, 2014
Chaotic breccias and megabreccias – locally called gash breccias – hosted within the Pembroke Limestone Group (Visean, Mississippian, lower Carboniferous) of southwest Wales are re-mapped along with spatially-related crackle and mosaic breccias.
Miller, AVM, Woodcock, NH, Woodhouse, CD
core   +1 more source

Water abundance evaluation of weathered bedrock aquifers based on FAHP and coefficient of variance method

Meikuang Anquan, 2023
The weathering at the top of bedrock in Jurassic coalfield in northern Shaanxi is strong, and the formed weathered bedrock aquifer is the main water filling source of the mine, which poses a serious threat to the safe mining of the mine.
BAI Yang, NIU Chao, LI Fan, XIANG Min, ZHAO Shuhui
doaj   +1 more source

Early Middle Paleozoic Intraplate Orogeny in the Ogcheon Belt (South Korea): A new insight on the Paleozoic buildup of east Asia [PDF]

, 1991
Laurent Jolivet est Professeur à l'Université d'Orléans depuis le 1er septembre 2009.International audienceThe polycyclic Ogcheon belt of South Korea represents the boundary between two Precambrian blocks.
Cadet, Jean-Paul, Cluzel, Dominique, Jolivet, Laurent   +2 more
core   +3 more sources

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan, Mikhailova, Polina, Nachtergaele, Simon, Van Ranst, Gerben, Vetrov, Evgeny, Vetrova, Natalia, Zhimulev, Fedor   +6 more
core   +1 more source

Comprehensive Prevention and Control Technology of Goaf Water Damage in Roadway Tunneling

Meikuang Anquan, 2020
The extended tunneling area of the return-air roadway in the second mining area of Weiqiang Coal Mine was taken as the research object. Through the analysis of mine geological and hydrogeological conditions, combined with the previous exploration of ...
WEI Xiaonong, FANG Gang, LIU Yang, LIU Xinghe, BAI Jing
doaj   +1 more source

Uplift, Climate and Biotic Changes at the Eocene-Oligocene Transition in Southeast Tibet [PDF]

, 2018
The uplift history of southeastern Tibet is crucial to understanding processes driving the tectonic evolution of the Tibetan Plateau and surrounding areas.
Deng, Cheng-Long, Deng, Wei-Yu-Dong, Huang, Jian, Huang, Yong-Jiang, Jia, Lin-Bo, Li, Shi-Hu, Li, Shu-Feng, Liu, Jia, Sherlock, Sarah, Spicer, Robert A., Su, Tao, Valdes, Paul J., Wang, Li, Xu, He, Zhang, Shi-Tao, Zhou, Zhe-Kun   +15 more
core   +3 more sources

Application of unmanned aerial vehicle in the investigation of hidden disasters on coal mine surface

Meikuang Anquan, 2021
In view of the problems of slow speed, long cycle and terrain limitation in the investigation of hidden disasters on the surface of traditional coal mines, taking the shallow coal seam production coal mine in Shenbei Mining Area of Jurassic coalfield in
WU Minjie
doaj   +1 more source

Biomarker signatures of the Middle Jurassic coals from the Zhangjialiang mine in Dongsheng coalfield, North China: Implications for palaeoenvironment and palaeovegetation

Energy Exploration & Exploitation, 2022
The study on the Zhangjialiang No. 2 coal of Middle Jurassic Yan'an Formation in the northeastern Ordos Basin has been analyzed by gas chromatography-mass spectrometry (GC-MS) to determine geochemical characteristics and reconstruct palaeovegetation and palaeoclimate changes.
Ke Zhang, Lin Xiao, Zhixiang Shi, Wenwu Zhao, Zeqi Tian, Zhiyong Wang, Xu Guo, Jianguo Yao, Jialiang Ma, Maksim G Blokhin, Cunliang Zhao   +10 more
openaire   +2 more sources

An accurate record of volcanic ash fall deposition as characterized by dispersed organic matter in a Lower Permian tonstein bed (Faxinal Coalfield, Paraná Basin, Brazil) [PDF]

, 2013
For the first time, the dispersed organic matter in the tonstein layer interbedded with a coal seam in the Faxinal Coalfield (Sakmarian, Southern Paraná Basin, Brazil) is characterized. The deposition of clusters of pollen grains was highly influenced by
Cazzulo Klepzig, M., Degani Schmidt, I., Formoso, M.L.L., Guerra Sommer, M., Mendoça Filho, J.G., Simas, M.W.   +5 more
core   +2 more sources

Fracture activation in the overburden and aquiclude stability under the mining of close-distance coal seams

Meitian dizhi yu kantan
BackgroundIn the Jurassic coalfield of northern Shaanxi Province, the repeated mining of close-distance coal seams exacerbates the activation of fractures in the overburden.
Jian CAO, Haitao SU, Chao WANG, Jianwei LI, Liang LI, Xuwei MAO   +5 more
doaj   +1 more source