Results 51 to 60 of about 162,633 (257)

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

High‐Resolution Data Sets for Global Carbonate and Silicate Rock Weathering Carbon Sinks and Their Change Trends

Earth's Future, 2022
The Carbonate rock weathering Carbon Sink (CCS) and Silicate rock weathering Carbon Sink (SCS) play a significant role in the carbon cycle and global climate change.
Lian Xiong, Xiaoyong Bai, Cuiwei Zhao, Yangbin Li, Qiu Tan, Guangjie Luo, Luhua Wu, Fei Chen, Chaojun Li, Chen Ran, Huipeng Xi, Xuling Luo, Huan Chen, Sirui Zhang, Ming Liu, Suhua Gong, Biqin Xiao, Chaochao Du, Fengjiao Song   +18 more
doaj   +1 more source

Geochemistry of sediment core PS81/652-1

, 2017
Geochemistry of sediment core PS81/652-
Boetius, Antje, Molari, Massimiliano, Massimiliano Molari (6960149), Antje Boetius (6962468)   +3 more
core   +1 more source

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source

Oxidation state of Cu in silicate melts at upper mantle conditions

Scientific Reports
Beyond its economic value, copper (Cu) serves as a valuable tracer of deep magmatic processes due to its close relationship with magmatic sulfide evolution and sensitivity to oxygen fugacity (fO2).
Xingcheng Liu, Lei Zhang, Sanyuan Zhu, Li Li, Xiaolin Xiong   +4 more
doaj   +1 more source

Dissolved Carbon Dynamics in Artificial Karst Spring Systems: Impacts of Land Use Management

Ecosystem Health and Sustainability
Determining how land use management affects dissolved carbon fluxes in karst springs is important for understanding weathering-related carbon transfer and subsurface carbon dynamics.
Liangxing Shi, Mingyu Shao, Sibo Zeng, Min Zhao, Zaihua Liu, Haibo He, Hailong Sun, Qiufang He, Xing Liu, Guanxia Cai, Yikun Jia, Yirun Zhang, Pan Tao   +12 more
doaj   +1 more source

Organic Matter Accumulation Mechanism in the Lower Cambrian Strata from Well Luntan 1 in the Tarim Basin, NW China

Geofluids, 2021
A large amount of light crude oils have been found within 4000 to 7000 m deep strata of Cambrian, Ordovician, and Silurian reservoirs in the Tarim Basin, NW China.
Qian Deng, Haizu Zhang, Haozhe Wang, Zhiwei Wei, Bin Cheng, Shida Li, Yunpeng Wang, Oluwabamise Lekan Faboya, Zewen Liao   +8 more
doaj   +1 more source

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

Pegmatite lithium deposits formed within low-temperature country rocks

Nature Communications
The global climate crisis is likely to lead to a potential supply risk of lithium (Li) over the coming decades. More than half of the world’s production of Li is derived from Li-bearing pegmatites.
Jinsheng Zhou, Qiang Wang, He Wang, Jinlong Ma, Guanhong Zhu, Le Zhang   +5 more
doaj   +1 more source

Geochemistry of Joey_core12 peat core

, 2018
Geochemistry of Joey_core7 peat ...
Camill, Philip, Philip Camill (6971222)
core   +1 more source