Results 61 to 70 of about 294,419 (331)

Mercury vapor air–surface exchange measured by collocated micrometeorological and enclosure methods – Part I: Data comparability and method characteristics [PDF]

Atmospheric Chemistry and Physics, 2015
Reliable quantification of air–biosphere exchange flux of elemental mercury vapor (Hg0) is crucial for understanding the global biogeochemical cycle of mercury.
W. Zhu, J. Sommar, C.-J. Lin, X. Feng
doaj   +1 more source

Precipitation mechanism of anhydrite cement in lacustrine tight sandstone: Implications for fluid activity, mass transfer and pore origin of open diagenetic system in tight sandstone

The Depositional Record, EarlyView.
This paper discusses a new model concerning the precipitation mechanismand significance of anhydrite cement in tight sandstone. Anhydrite cement ismainly formed by the dissolution and reprecipitation of early‐diageneticcalcite cements, feldspars and volcanic rock fragments at the mesodiageneticstage.
Long Luo, Meng Li, Shanzheng Tan, Xianfeng Tan, Xin Yu, Jon Gluyas, Jia Wang, Wei Jiang, Xuejiao Qu, Kangjun Wu, Yiting Gu   +10 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

Coral Paleoclimate Perspectives Support the Role of Low‐Latitude Forcing on the 4.2 ka BP Event

Geophysical Research Letters, 2023
The 4.2 ka BP Event is an abrupt climate change that might have contributed to the collapse of ancient civilizations and marks the transition between the mid‐ and late‐Holocene.
Xuefei Chen, Wenfeng Deng, Hangfang Xiao, Huimin Guo, Ti Zeng, Jian‐xin Zhao, Gangjian Wei   +6 more
doaj   +1 more source

Optimal mud pressure design using nonlinear failure criteria for wellbores in shaley sedimentary reservoir

Deep Underground Science and Engineering, EarlyView.
The present study uses the Modified Mohr‐Coulomb true‐triaxial failure criterion (MMC_TT), which predicts the strength of rock better than the MGC criterion in laboratory true‐triaxial tests to overcome the limitations. Moreover, based on the data from previously published five vertical wells in the Krishna‐Godavari basin (K‐G basin), an empirical ...
Ravindra K. Burnwal, Aditya Singh
wiley   +1 more source

Temporal niche partitioning of bacterial communities shaped by hydrologic fluctuations and drought regimes in karst caves

Ecological Processes
Background In monsoon regions, wet-dry cycles may establish environmental gradients that influence both the richness and composition of cave bacterial communities.
Sitong Gong, Weijun Luo, Yina Lyu, Jia Chen, Anyun Cheng, Shijie Wang   +5 more
doaj   +1 more source

Geology of the Kapit Ore Zone and comparative Geochemistry with minifie and Liennetz Ore Zones, Ladolam gold deposit, Lihir Island, Papua New Guinea [PDF]

, 2023
M Ageneau
openalex   +1 more source

Blasting effects of cross‐fault deep‐buried excavation on adjacent existing tunnel stability

Deep Underground Science and Engineering, EarlyView.
Based on the theoretical analysis of cylindrical wave propagation in a deep rock mass in the fault with a filling layer, the calculation method of peak particle velocity caused by wave propagation in the existing tunnel is established. The viscoelastic characteristics of a rock mass are examined in the analysis.
Shaobo Chai, Lianzeng Chai, Chao Meng, Kai Liu, Lang Song, Shaojie Zheng   +5 more
wiley   +1 more source

Sedimentary facies controlled biogeochemical process of biotic extinction and turnover across the Cambrian SPICE event

Communications Earth & Environment
The Steptoean positive carbon isotope excursion (SPICE) event, one of the largest carbon cycle perturbations in the Cambrian, coincides with shallow-shelf-fauna extinction and plankton revolution (critical transition of plankton).
Haozhe Wang, Haizu Zhang, Yiman Zhang, Bin Cheng, Qian Deng, Donghui Wang, Guanyu Zhao, Zewen Liao   +7 more
doaj   +1 more source

A Critical Review of the Effectiveness of Biochar Coupled with Arbuscular Mycorrhizal Fungi in Soil Cadmium Immobilization

Journal of Fungi
Cadmium-contaminated soil significantly threatens global food security and human health. This scenario gives rise to significant worries regarding widespread environmental pollution.
Xin Fang, Xinqing Lee, Gratien Twagirayezu, Hongguang Cheng, Hongyu Lu, Shenglan Huang, Linbo Deng, Bo Ji   +7 more
doaj   +1 more source