Results 11 to 20 of about 15,843 (258)

Continental chemical weathering during the Early Cretaceous Oceanic Anoxic Event (OAE1b): a case study from the Fuxin fluvio-lacustrine basin, Liaoning Province, NE China

Journal of Palaeogeography, 2020
This study focuses on Early Cretaceous mudstones from the Shahai and Fuxin formations in the Fuxin continental basin. We analyse chemical weathering, land surface temperatures and palaeoclimates based on chemical weathering indices, and emphasize the ...
Xiao-Tao Xu, Long-Yi Shao, Bo Lan, Shuai Wang, Jason Hilton, Jian-Yi Qin, Hai-Hai Hou, Jie Zhao   +7 more
doaj   +1 more source

The circular nutrient economy of terrestrial ecosystems and the consequences for rock weathering

Frontiers in Environmental Science, 2023
Earth’s biosphere is thought to exert a substantial influence on regolith evolution and chemical weathering rates. However, ecosystems are also highly efficient at retaining and recycling nutrients.
Kate Maher, Friedhelm von Blanckenburg, Friedhelm von Blanckenburg   +2 more
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Mobile evaporite enhances the cycle of physical–chemical erosion in badlands [PDF]

Earth Surface Dynamics, 2023
Chemical weathering driven by physical erosion is a natural process that strongly affects chemical and solid matter budgets at the Earth's surface. However, the influence of extreme climatic erosion on chemical weathering dynamics is poorly understood ...
C.-J. Yang, C.-J. Yang, P.-H. Chen, E. D. Erlanger, J. M. Turowski, S. Xu, T.-Y. Teng, J.-C. Lin, J.-C. Huang   +8 more
doaj   +1 more source

Hydrochemistry applied to assess the chemical weathering and soil removal rates in the Sorocaba River basin, São Paulo State

Brazilian Journal of Geology, 2020
: Chemical weathering and soil removal rates are responsible for the Earth’s landscape, composition of surface and groundwater, producing the soils and buffering the composition of the atmosphere.
Alexandre Martins Fernandes, Fabiano Tomazini da Conceição, Jeferson Mortatti   +2 more
doaj   +1 more source

Geochemistry of the dissolved loads during high-flow season of rivers in the southeastern coastal region of China: anthropogenic impact on chemical weathering and carbon sequestration [PDF]

Biogeosciences, 2018
The southeastern coastal region is one of the most developed and populated areas in China. Meanwhile, it has been severely impacted by acid rain over many years.
W. Liu, W. Liu, W. Liu, Z. Xu, Z. Xu, Z. Xu, H. Sun, H. Sun, T. Zhao, T. Zhao, C. Shi, T. Liu   +11 more
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The Effect of Size Distribution on the Geochemistry and Mineralogy of Tropical River Sediments and Its Implications regarding Chemical Weathering and Fractionation of Alkali Elements

Lithosphere, 2022
The mineralogical and geochemical compositions of the sediments deposited by rivers have been used extensively to evaluate past chemical weathering and the physical erosion history of drainage basins at different time scales.
Kaikai Wu, Shengfa Liu, Xuefa Shi, Christophe Colin, Franck Bassinot, Zhanghua Lou, Hui Zhang, Aimei Zhu, Xisheng Fang, Che Abd. Rahim Mohamed   +9 more
doaj   +1 more source

Provenance and weathering conditions of the Moloundou swamp sediments, southeast Cameroon: Evidence from mineralogy and geochemistry

Solid Earth Sciences, 2020
This work reports the mineralogical and geochemical characterization of the Moloundou swamp sediments in order to deduce their tectonic setting, source rock composition, weathering conditions and maturity.
Armel Zacharie Ekoa Bessa, Gabriel Ngueutchoua, Emile Ekomane, Salomon Bertrant Bissé, Bokanda Ekoko Eric, Durane Chougong, Jacques Alex Kam, Tessontsap Teutsong   +7 more
doaj   +1 more source

Chemical weathering in hardened volcanic horizons (tepetates) of the State of Mexico

Revista Mexicana de Ciencias Geológicas, 2022
Weathering is one of the most important phenomena that affect the balance dynamics of the Earth's crust. The chemical composition of soil samples and hardened horizons from seven profiles (P1 to P7) of the State of Mexico was compared to detect the ...
Otilio A. Acevedo-Sandoval, Francisco Prieto-García, Judith Prieto-Méndez, Yolanda Marmolejo-Santillán, Claudia Romo-Gómez   +4 more
doaj   +1 more source

Contrasted Chemical Weathering Rates in Cratonic Basins: The Ogooué and Mbei Rivers, Western Central Africa

Frontiers in Water, 2021
Despite the absence of tectonic activity, cratonic environments are characterized by strongly variable, and in places significant, rock weathering rates. This is shown here through an exploration of the weathering rates in two inter-tropical river basins
Jean-Sébastien Moquet, Jean-Sébastien Moquet, Julien Bouchez, Jean-Jacques Braun, Jean-Jacques Braun, Jean-Jacques Braun, Sakaros Bogning, Auguste Paulin Mbonda, Sébastien Carretier, Vincent Regard, Jean-Pierre Bricquet, Marie-Claire Paiz, Emmanuel Mambela, Jérôme Gaillardet   +13 more
doaj   +1 more source

Evaluating the Effects of Sedimentary Cycles (Aeolian and Fluvial) on Chemical Weathering Indices in Rafsanjan Region, Southeast of Iran [PDF]

Desert, 2022
Chemical indices are widely used for characterizing the degree of weathering. In this study, we focused on evaluating the capability of chemical weathering indices to distinguish the sequence of aeolian-fluvial sediments in an arid region of Iran.
I. Esfandiarpour-Boroujeni, F. Bandehelahi, Z. Mosleh, A. Karimi, M.H. Farpoor, M. Fattahi   +5 more
doaj   +1 more source