Results 41 to 50 of about 4,918,557 (342)

Characteristics of interactions between black shale and water [PDF]

open access: yesE3S Web of Conferences, 2019
Some geological engineering problems are caused by weathering of black shale within dispersed sulfide minerals (mainly pyrite), in which some weathering products such as acid water and expansive sulfates play an important role.
Liao Xin   +5 more
doaj   +1 more source

Molecular-Composition Analysis of Glass Chemical Composition Based on Time-Series and Clustering Methods

open access: yesMolecules, 2023
The weathering of ancient glass relics has long been a concerned. Therefore, a systematic and more comprehensive mathematical model with which to correctly judge the category of ancient glass products whose chemical composition changes due to weathering ...
Ying Zou
doaj   +1 more source

Modelling of slope processes on karst

open access: yesActa Carsologica, 2011
The present paper is concerned with the modelling of the karst slope processes. A simple straightforward one dimensional physical model is introduced in order to assess basic behaviour of the slope development.
Uroš Stepišnik, Gregor Kosec
doaj   +1 more source

Chemical Weathering Intensity as a Reliable Indicator for Southwest Summer Monsoon Reconstruction: Evidence From Clay Minerals of Qionghai Lake Sediments Since the Last Glacial Maximum

open access: yesGeochemistry, Geophysics, Geosystems, 2023
Studying the evolution history of the southwest summer monsoon (SSM) throughout geological time, particularly during its strongest period in the Holocene, can improve our understanding of its variation and driving mechanisms, and even help predict future
Xiaoli Yu   +10 more
doaj   +1 more source

The Structural Characteristics and Chemical Composition of Serpentine Jade Weathering Rinds: Implications for the Formation Process

open access: yesCrystals, 2023
Weathering rind retains the greatest extent of the mineralogical and chemical composition information of the original mineral. Recently, we found some brownish-yellow or khaki serpentine jade weathering rinds with a thickness of 0.2–0.6 cm in Ji’an.
Shanna Xue   +3 more
doaj   +1 more source

Intensified chemical weathering during Early Triassic revealed by magnesium isotopes

open access: yes, 2020
Marine ecosystem recovery after the latest Permian mass extinction (LPME) was a protracted process during the Early Triassic (∼252–247 Ma) owing to repeated climatic and environmental perturbations.
Xin-Yang Chen   +3 more
semanticscholar   +1 more source

Physical and chemical weathering rates and CO2 consumption in a tropical lateritic environment: the upper Niger basin [PDF]

open access: yes, 1998
The chemical composition of Niger river water measured bimonthly at Bamako Mali. during the period 1990–1992 provides an estimate of present weathering rates in the upper Niger basin.
Boeglin, Jean-Loup, Probst, Jean-Luc
core   +2 more sources

Cu and Zn isotope fractionation during extreme chemical weathering

open access: yesGeochimica et Cosmochimica Acta, 2019
Copper and Zn are trace metal micronutrients whose stable isotope systematics are receiving increasing attention as possible paleoenvironmental tracers.
S. Little   +5 more
semanticscholar   +1 more source

Relating the spatial variability of chemical weathering and erosion to geological and topographical zones

open access: yesGeomorphology, 2020
The relationship between the spatial variability of soil elements, weathering and erosion rates can be very complex. Topography, abruptly-changing elevation gradients and slopes of varying geological composition exert an important influence on weathering
Farzaneh Derakhshan-Babaei   +5 more
semanticscholar   +1 more source

Worldwide distribution of continental rock lithology: Implications for the atmospheric/soil CO2 uptake by continental weathering and alkalinity river transport to the oceans [PDF]

open access: yes, 2003
The silicate rock weathering followed by the formation of carbonate rocks in the ocean, transfers CO2 from the atmosphere to the lithosphere. This CO2 uptake plays a major role in the regulation of atmospheric CO2 concentrations at the geologic ...
Amiotte Suchet, Philippe   +2 more
core   +2 more sources

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