WebMar 24, 2024 · Declining or at the very least stable chemical weathering intensity in the late Miocene at the same time that sedimentation rates in the submarine fan decreased means that total weathering fluxes must have been declining at this time and cannot have been the mechanism by which atmospheric CO 2 was reduced, which drove long-term … WebMar 26, 2024 · As mentioned above, kaolinite is formed by chemical weathering, while illite/chlorite are mostly inherited from parent rocks by physical erosion. Thus, the kaolinite vs. illite/chlorite ratio indicates the types of weathering (chemical weathering vs. physical erosion) that affected the sediments, with the weathering intensity given by smectite.
Chemical Weathering Intensity and Terrigenous Flux in …
WebAug 24, 2024 · The late Miocene was a period of declining CO 2 levels and extensive environmental changes, which likely had a large impact on monsoon strength as well as on the weathering and erosion intensity in the South Asian Monsoon domain. To improve our understanding of these feedback systems, detrital clays from the southern Bay of Bengal … Web2 days ago · The change characteristics of chemical weathering intensity (proxies CIA and K₂O/TiO₂) were divided into two phases, the Holocene (present day to 11.7 ka) and before the Holocene (11.7–36.7 ka). The CIA values decreased significantly while the K₂O/TiO₂ ratio increased during cold climate periods (YD, H1-H3 and LGM), indicating a ... cstring euc-kr
Frontiers Applicability and Variability of Chemical Weathering ...
WebFeb 1, 2013 · The chemical index of alteration (CIA) is a tool to calculate the weathering intensity (Nesbitt and Young, 1982). It has been largely used to reconstitute the past climates on Earth at different epochs and to determine the sediment source rocks from … WebApr 11, 2024 · 1.Introduction. Chemical weathering of silicates plays an important role in regulating global climate change on tectonic timescales. During this process, atmospheric CO 2 is consumed through the neutralisation of carbonic acid and precipitation of calcium (Ca) and magnesium (Mg) bearing carbonates over geological time-scales (Berner et al., … WebApr 15, 2024 · During low-intensity chemical weathering, this mechanism should be the dominant process, as supported by the high δ 41 K values of water from low-WI rivers (Fig. 3A). In contrast, during high-intensity chemical weathering of silicates, gibbsite and iron oxides are the weathering products ( 39 ) and no K is retained in solid phases. c# string extension methods