Results 31 to 40 of about 5,358 (287)

Geochemical characterisation of clastic sediments in Kompina (N'kapa Formation, NW Douala Basin, West Cameroon): Implication for provenance, paleoweathering and sediment maturity

Heliyon, 2023
Chemical analyses were carried out on clastic sedimentary rocks in Kompina (N'kapa Formation of the NW, Douala Basin, West Africa) to disclosed the composition of their source rock, characterised their tectonic domains, decipher the intensity of the past
Florence Njinto Kwankam, Bokanda Ekoko Eric, Amaya Adama, Bisse Salomon Bertrant, Anyeku Njeck Rexon Junior, Nfor Shannon Ngwakfu, Mokake Fidelis Esue, Matombo Hewett Ekumeli, Ngwane Maureen Ntube, M. Christopher Agyingi   +9 more
doaj   +1 more source

Intense Chemical Weathering at Glacial Meltwater-Dominated Hailuogou Basin in the Southeastern Tibetan Plateau [PDF]

Water, 2019
Climate warming has caused rapid shrinkage of glaciers in the Tibetan Plateau (TP), but the impact of glacier retreat on the chemical denudation rate remains largely unknown at the temperate glacial basins. The chemical weathering processes were examined at a temperate glacial basin (HLG) in the southeastern TP based on comprehensive data from the ...
Xiangying Li, Yongjian Ding, Qiao Liu, Yong Zhang, Tianding Han, Zhefan Jing, Zhongbo Yu, Qijiang Li, Sha Liu   +8 more
openaire   +1 more source

Reconstruction of monsoon evolution in southernmost Sumatra over the past 35 kyr and its response to northern hemisphere climate changes

Progress in Earth and Planetary Science, 2020
Reconstruction of monsoon evolution in the tropical Indian Ocean and evaluation of its influence on large-scale ocean circulation and sea-air interaction processes can help us understand climate driving mechanisms.
Shengfa Liu, Hui Zhang, Xuefa Shi, Min-Te Chen, Peng Cao, Ziye Li, Rainer Arief Troa, Rina Zuraida, Eko Triarso, Hendrizan Marfasran   +9 more
doaj   +1 more source

Was the Late Paleocene-Early Eocene Hot Because Earth Was Flat? An Ocean Lithium Isotope View of Mountain Building, Continental Weathering, Carbon Dioxide, and Earth's Cenozoic Climate [PDF]

Oceanography, 2014
Hothouse climates in Earth's geologic past, such as the Eocene epoch, are thought to have been caused by the release of large amounts of carbon dioxide and/or methane, which had been stored as carbon in biogenic gases and organic matter in sediments, to ...
Flip Froelich, Sambuddha Misra
doaj   +1 more source

Geochemical signatures of potassium metasomatism in anthracite from the Himalayan fold-thrust belts of Sikkim, India

International Journal of Coal Science & Technology, 2022
The present study focuses on the inorganic geochemical features of the bituminous coal samples from the Raniganj and the Jharia Basins, as well as the anthracite samples from the Himalayan fold-thrust belts of Sikkim, India.
Santanu Ghosh, Anwita Ojha, Atul Kumar Varma   +2 more
doaj   +1 more source

Mineralogy and chemical composition of Cryosols and Andosols in Antarctica

Soil and Water Research, 2018
Variations in mineralogical and elemental composition of Turbic Cryosol (King George Island and James Ross Island), Skeletic Cryosol (J. Ross Island, the Trinity Peninsula), Leptic Andosols (Deception Island), and Skeletic Andosols (Deception Island ...
Vítězslav VLČEK, Ľubica POSPÍŠILOVÁ, Peter UHLÍK   +2 more
doaj   +1 more source

A preliminary study on the formation conditions and weathering leaching enrichment mechanism of secondary phosphorite in the Xinhua phosphate mining area, Zhijin, Guizhou

地质科技通报, 2022
The Xinhua phosphate mining are alocated in Zhijin County, Guizhou Province, is a famous superlarge low-grade phosphate deposit containing rare earth elements in the southwest of China.The average P2O5 grade of the deposit is 17.22%.The proven ...
Kunping Liang, Guofan Cheng, Qingyan Qin, Rong Wu, Bin Li   +4 more
doaj   +1 more source

Weathering Processes on Sandstone Painting and Carving Surfaces at Prehistoric Rock Sites in Southern Spain

Applied Sciences, 2022
The sandstones which constitute the host rock for the prehistoric artwork in the Rock Groups of Tajo de las Figuras and Peñas de Cabrera (southern Spain) show a serious degree of alteration, due both to natural processes and those related to ...
Juan Carlos Cañaveras, Enrique Sanz-Rubio, Sergio Sánchez-Moral   +2 more
doaj   +1 more source

Chemical weathering proxies: An assessment of their robustness to reconstruct Paleozoic climate conditions

Evolving Earth
Several chemical weathering proxies for siliciclastic sedimentary deposits have been proposed over the last fifty years. However, only a few studies have evaluated their robustness for paleoclimate interpretation.
Franciele Agnesa Trentin, Joice Cagliari, Karlos G.D. Kochhann, Tracy Frank   +3 more
doaj   +1 more source

Enhanced Continental Weathering Triggered the Anoxia of Seawater and Mass Extinctions During the Late Ordovician

Journal of Marine Science and Engineering
During the Late Ordovician period, changes in climate and mass extinctions were observed; however, the factors influencing these phenomena have not been fully understood.
Pan Tang, Xiangrong Yang, Detian Yan
doaj   +1 more source