Results 41 to 50 of about 55,254 (299)

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

Atmospheric CO2 consumption by continental erosion : present-day controls and implications for the last glacial maximum [PDF]

, 1998
The export of carbon from land to sea by rivers represents a major link in the global carbon cycle. For all principal carbon forms, the main factors that control the present-day fluxes at the global scale have been determined in order to establish global
Amiotte Suchet, Philippe, Ludwig, Wolfgang, Munhoven, Guy, Probst, Jean-Luc   +3 more
core   +2 more sources

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

Theoretical Spectra of Terrestrial Exoplanet Surfaces [PDF]

, 2012
We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable via prominent Si-O features in ...
Batalha, Best, Bethany L. Ehlmann, Borucki, Borucki, Cheek, Clark, Clark, Cochran, Cowan, de Pater, Drilling, Farmer, Gautier, Koch, Miller-Ricci, Muirhead, Pieters, Pieters, RELAB Spectral Database, Renyu Hu, Rogers, Salisbury, Sara Seager, Seager, Seager, Sobolev, Sprague, Winn   +28 more
core   +2 more sources

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

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 of the volcanic soils of Isla Santa Cruz (Galápagos Islands, Ecuador) [PDF]

, 2014
We present a study on weathering of volcanic soils using 43 profiles (131 horizons) sampled in Santa Cruz Island (Galapagos Islands). Several weathering indices, based on chemical composition, are used. Since the geological material is highly homogeneous
Ferro, C, Martínez-Cortízas, A, Rodríguez-Lado, L, Stoops, Georges, Taboada, T   +4 more
core   +1 more source

High potential for weathering and climate effects of non-vascular vegetation in the Late Ordovician [PDF]

, 2016
It has been hypothesized that predecessors of today’s bryophytes significantly increased global chemical weathering in the Late Ordovician, thus reducing atmospheric CO2 concentration and contributing to climate cooling and an interval of glaciations ...
A Boucot, A Herrmann, A Ito, A Pohl, AE Bartholomé, B Fletcher, B Weber, C Beer, C Buendía, C Humphreys, C Wellman, C Yapp, C Zambell, D Edwards, D McCarroll, E Raevskaya, E Van Der Heijden, F Hourdin, G Bluth, J Belnap, J Chen, J Gaillardet, J Jauhiainen, J Moncrieff, J Quirk, J Silvola, J Veizer, K Field, K Moulton, K Sharma, L Kump, L Reinhold, M Cochran, M Heijmans, M Sonesson, N Bergman, N Carvalhais, P Amiotte Suchet, P Brady, P Kenrick, P Porada, P Porada, P Strother, PA Suchet, R Aghamiri, R Berner, R Berner, R Berner, R Botting, R Eckstein, R Honegger, R Pavlick, R Stretch, S Arens, T Jackson, T Jackson, T Lenton, W Elbert, W Pitman, X Yuan, Z Tuba   +60 more
core   +3 more sources

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Records of Chemical Weathering and Plateau Saline Lake Sediments Linked to Paleoclimate Fluctuations During the Eocene

Geochemistry, Geophysics, Geosystems
Interactions between mountain building, weathering and climate draw significant attention within the geoscience community. In this study, the mixed rocks from the Eocene Lower Ganchaigou Formation (LGCG) of the Qaidam Basin are employed for weathering ...
Peng Pang, Xiucheng Tan, Kunyu Wu, Songtao Wu, Haoting Xing, Menglin Zhang, Na Zhang, Wei Deng   +7 more
doaj   +1 more source