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Chemical Weathering of Glauconite
Soil Science Society of America Journal, 1975Abstract Glauconite samples were collected from geologic cuts in the Barce Plateau in the eastern part of Libya. The glauconite was associated with limestone, dolomitic limestone, marl, marl stone, chert, and kaolinite.
Gilani Abudelgawad +2 more
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CRONO—A code for the simulation of chemical weathering
Computers & Geosciences, 2013CRONO is a new code for simulating chemical weathering. This program allows for the simulation of complex scenarios of interaction in water-rock-gas systems while accounting for mineral dissolution kinetics and solution transport. The thermodynamic calculations are realized using the GEOCHEQ program.
Alexey A. Novoselov +1 more
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Chemical Weathering in Central Iceland: An Analog of Pre-Silurian Weathering
Science, 1969The rate of chemical weathering in central Iceland is two to three times more rapid in areas with plant cover than in barren areas. This relatively small difference in chemical weathering rates suggests that atmospheric CO 2 pressures no greater than five times the present value were needed to sustain present-day ...
J L, Cawley, R C, Burruss, H D, Holland
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Physical and Chemical Weathering
2015As one geologist exclaimed: “Savor the irony should the metamorphic muscles that push mountains to the sky be driven by the pitter patter of tiny raindrops.” In the following chapters we look at this pitter patter, a synonym for exogenic processes that shape our landforms, starting with the most important process: weathering.
Anja M. Scheffers +2 more
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Weathering of chemically modified wood
Holz als Roh- und Werkstoff, 1992The weathering characteristics and microscopic structure of unfinished acetylated and untreated radiata pine are reported. Samples were exposed outdoors over 28 weeks in Rotorua, New Zealand. Acetylated veneer had improved checking resistance when compared with untreated veneer, confirming results of a previous study on accelerated weathering of ...
E. A. Dunningham +2 more
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The microfabric of a chemically weathered granite
Bulletin of the International Association of Engineering Geology, 1978A scanning electron microscope has been used to observe the microfabric changes in granite that are brought about by weathering. The initial ingress of weathering agencies occurs along primary cracks and pores and open cleavages and results in decomposition and solution along structurally controlled planes in feldspars, the decomposition and expansion ...
J. Baynes, W. R. Dearman
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Chemical weathering in glacial environments
Geology, 1997Do glaciers enhance or inhibit chemical weathering rates relative to other environments? The importance of glaciers in the global carbon cycle and climate change hinges on the answer. We show that catchments occupied by active alpine glaciers yield cation denudation rates greater than the global mean rate but do not exceed rates in nonglacial ...
Suzanne Prestrud Anderson +2 more
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Recent chemical weathering of basalts
American Journal of Science, 1992Relative bulk leach rates of the major elements Na, Ca, Mg, Fe, Al, Ti, and Si from studied basaltic weathering profiles are not greatly affected by primary mineralogy or by bulk composition of the parent basalt, probably because major silicate phases are weathered at grossly similar rates.
H. W. Nesbitt, R. E. Wilson
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2019
Chemical and phase compositions of the surface of Venus could reflect a history of gas–rock and fluid–rock interactions, recent and past climate changes, and a loss of water from the Earth’s sister planet. The concept of chemical weathering on Venus through gas–solid type reactions was established in the early 1960s after the discovery of the hot and ...
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Chemical and phase compositions of the surface of Venus could reflect a history of gas–rock and fluid–rock interactions, recent and past climate changes, and a loss of water from the Earth’s sister planet. The concept of chemical weathering on Venus through gas–solid type reactions was established in the early 1960s after the discovery of the hot and ...
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1970
Direct comparison of chemical analyses of fresh and weathered rocks shows that some constituents have been lost from fresh rock during weathering, and that some have accumulated in the weathered material. Some minerals are more stable than others to the weathering processes, and some chemical elements react with the watery solutions that cause ...
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Direct comparison of chemical analyses of fresh and weathered rocks shows that some constituents have been lost from fresh rock during weathering, and that some have accumulated in the weathered material. Some minerals are more stable than others to the weathering processes, and some chemical elements react with the watery solutions that cause ...
openaire +1 more source