FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4242024752> ?p ?o ?g. }

• W4242024752 endingPage "130" @default.
• W4242024752 startingPage "116" @default.
• W4242024752 abstract "Abstract Sedimentary records suggest that the mid-Proterozoic (ca. 1.8–0.8 Ga) was persistently characterized by a greenhouse climate despite significantly lower solar luminosity compared to modern levels. To maintain greenhouse conditions, the partial pressure of carbon dioxide (pCO2) must have remained elevated, possibly indicative of key differences in the complexities of the carbon cycle compared to the modern. Modeling has suggested that high pCO2 was likely maintained by elevated rates of “reverse weathering:” marine authigenic clay formation, a process that consumes alkalinity and generates CO2. This process is kinetically slow in modern marine environments, yet is hypothesized to have been enhanced during the mid-Proterozoic due to the greater availability of important species for clay authigenesis such as silica and ferrous iron. This hypothesis is testable using the geological record, because enhanced reverse weathering would lead to the formation of abundant marine authigenic clays. However, the distribution of marine authigenic clays in the Proterozoic sedimentary record has not been paid sufficient attention. In this study, we report the presence of authigenic clays (glauconite and berthierine) from the Xiamaling Formation (ca. 1.4 Ga), North China. The glauconite-berthierine horizons occur as millimeter-to centimeter-thick laminae interbedded with muddy siltstone and feature detrital grains supported by the clay matrix. In places, these layers were partially reworked to form soft and cohesive intraclastic sands, suggesting a syndepositional origin. We hypothesize that marine iron cycling in the iron- and silica-rich mid-Proterozoic oceans may have facilitated the formation of authigenic iron-rich clay during the deposition of the Xiamaling Formation. The formation of iron-hydroxides on the seafloor—and the local increase in pH caused by subsequent dissimilatory iron reduction—could have resulted in the absorption of SiO2, Al(OH)3, and Fe(OH)2 to form soft, cohesive and noncrystalline Fe(OH)3-SiO2-Al(OH)3-Fe(OH)2 gels. These gels would have subsequently converted to glauconite/berthierine through aging. The transformation from glauconite-rich layers to berthierine-rich laminae was likely facilitated by a greater availability of Fe(II), and therefore higher Fe(II)/TFe and Fe/Si ratios. We suggest that the relatively rapid formation of syndepositional, seafloor berthierine and glauconite layers in the basal Xiamaling Formation is the result of enhanced reverse weathering during this time. This study provides an important geological support for carbon cycle models that invokes enhanced reverse weathering rates in the mid-Proterozoic ocean that may have helped to maintain a high-baseline pCO2 during this time." @default.
• W4242024752 created "2022-05-12" @default.
• W4242024752 creator A5011170346 @default.
• W4242024752 creator A5023348100 @default.
• W4242024752 creator A5041664467 @default.
• W4242024752 creator A5043482154 @default.
• W4242024752 creator A5054057883 @default.
• W4242024752 creator A5056244787 @default.
• W4242024752 creator A5072294689 @default.
• W4242024752 creator A5087877306 @default.
• W4242024752 date "2022-01-03" @default.
• W4242024752 modified "2023-10-16" @default.
• W4242024752 title "Mesoproterozoic seafloor authigenic glauconite-berthierine: Indicator of enhanced reverse weathering on early Earth" @default.
• W4242024752 cites W1560828235 @default.
• W4242024752 cites W1887183126 @default.
• W4242024752 cites W1964215238 @default.
• W4242024752 cites W1966612000 @default.
• W4242024752 cites W1974110352 @default.
• W4242024752 cites W1974438203 @default.
• W4242024752 cites W1975281496 @default.
• W4242024752 cites W1975676133 @default.
• W4242024752 cites W1978083798 @default.
• W4242024752 cites W1980671448 @default.
• W4242024752 cites W1981281557 @default.
• W4242024752 cites W1984299882 @default.
• W4242024752 cites W1987732834 @default.
• W4242024752 cites W1994930702 @default.
• W4242024752 cites W1996545142 @default.
• W4242024752 cites W1999626355 @default.
• W4242024752 cites W2000177754 @default.
• W4242024752 cites W2002155667 @default.
• W4242024752 cites W2002953373 @default.
• W4242024752 cites W2006501176 @default.
• W4242024752 cites W2007558707 @default.
• W4242024752 cites W2008115350 @default.
• W4242024752 cites W2010823371 @default.
• W4242024752 cites W2010914404 @default.
• W4242024752 cites W2012269102 @default.
• W4242024752 cites W2015445386 @default.
• W4242024752 cites W2021429804 @default.
• W4242024752 cites W2024176565 @default.
• W4242024752 cites W2028049396 @default.
• W4242024752 cites W2032057467 @default.
• W4242024752 cites W2036237907 @default.
• W4242024752 cites W2036325370 @default.
• W4242024752 cites W2037365261 @default.
• W4242024752 cites W2042379092 @default.
• W4242024752 cites W2044856542 @default.
• W4242024752 cites W2048185041 @default.
• W4242024752 cites W2054620046 @default.
• W4242024752 cites W2057501684 @default.
• W4242024752 cites W2059512862 @default.
• W4242024752 cites W2063259333 @default.
• W4242024752 cites W2063974395 @default.
• W4242024752 cites W2066889537 @default.
• W4242024752 cites W2067523595 @default.
• W4242024752 cites W2071103381 @default.
• W4242024752 cites W2075585431 @default.
• W4242024752 cites W2079758306 @default.
• W4242024752 cites W2083500289 @default.
• W4242024752 cites W2087262442 @default.
• W4242024752 cites W2090249305 @default.
• W4242024752 cites W2092891768 @default.
• W4242024752 cites W2095567465 @default.
• W4242024752 cites W2097386376 @default.
• W4242024752 cites W2097578772 @default.
• W4242024752 cites W2097828895 @default.
• W4242024752 cites W2099369028 @default.
• W4242024752 cites W2105444028 @default.
• W4242024752 cites W2107810279 @default.
• W4242024752 cites W2117935716 @default.
• W4242024752 cites W2124512038 @default.
• W4242024752 cites W2124974872 @default.
• W4242024752 cites W2131750083 @default.
• W4242024752 cites W2138657979 @default.
• W4242024752 cites W2147545219 @default.
• W4242024752 cites W2148585617 @default.
• W4242024752 cites W2154982349 @default.
• W4242024752 cites W2156045345 @default.
• W4242024752 cites W2156981685 @default.
• W4242024752 cites W2157169158 @default.
• W4242024752 cites W2158194642 @default.
• W4242024752 cites W2158376084 @default.
• W4242024752 cites W2167003868 @default.
• W4242024752 cites W2180344755 @default.
• W4242024752 cites W2201109763 @default.
• W4242024752 cites W2228410629 @default.
• W4242024752 cites W2265295360 @default.
• W4242024752 cites W2283582373 @default.
• W4242024752 cites W2315477082 @default.
• W4242024752 cites W2325541267 @default.
• W4242024752 cites W2326459227 @default.
• W4242024752 cites W2334216286 @default.
• W4242024752 cites W2334477362 @default.
• W4242024752 cites W2350692534 @default.
• W4242024752 cites W2490921408 @default.
• W4242024752 cites W2526157218 @default.
• W4242024752 cites W2526226930 @default.

• next