Matches in SemOpenAlex for { <https://semopenalex.org/work/W2087344050> ?p ?o ?g. }
- W2087344050 endingPage "280" @default.
- W2087344050 startingPage "260" @default.
- W2087344050 abstract "Shale covers about 25% of the land surface, and is therefore an important rock type that consumes CO2 during weathering. We evaluated the potential of gray shale to take up CO2 from the atmosphere by investigating the evolution of dissolved inorganic carbon (DIC) concentrations and its carbon isotopic ratio (δ13CDIC) along water flow paths in a well-characterized critical zone observatory (Susquehanna Shale Hills catchment). In this catchment, chemical weathering in shallow soils is dominated by clay transformation as no carbonates are present, and soil pore waters are characterized by low DIC and pH. In shallow soil porewaters, the DIC, dominated by dissolved CO2, is in chemical and isotopic equilibrium with CO2 in the soil atmosphere where pCO2 varies seasonally to as high as 40 times that of the atmosphere. The degradation of ancient organic matter is negligible in contributing to soil CO2. The chemistry of groundwater varies along different flowpaths as soil pore water recharges to the water table and then dissolves ankerite or secondary calcite under the valley floor. Weathering of carbonate leads to much higher concentrations of DIC (∼2500 μmol/L) and divalent cations (Ca2+ and Mg2+) in groundwaters than soil waters. The depth to the ankerite weathering front is hypothesized to be roughly coincident with the water table but it varies due to heterogeneities in the protolith composition. Groundwater chemistry therefore shows different saturation indices with respect to ankerite depending upon location along the valley. The δ13CDIC values of these groundwaters document mixing between the ankerite and soil CO2. The major element concentrations, DIC, and δ13CDIC in the first-order stream incising the valley of the catchment are derived from groundwater and soil waters in proportions that vary both spatially and temporally. The CO2 degassed slightly in the stream but little evidence of C isotopic equilibration with the atmosphere is observed, due to the short length of the stream and short contact time with air. The ankerite reaction front also lies close to the pyrite dissolution front. Pyrite oxidation in bedrock likely released sulfuric acid and played a minor role in the ankerite dissolution, shifting groundwater δ13CDIC slightly above the expected mixing values. At the catchment scale, the stream SO42− is also dominantly derived from wet deposition, as stream has δ34SSO4 values around 3‰, well within the range of acid deposition. A mass balance calculation shows that silicate and ankerite dissolution of the Rose Hill shale at Shale Hills consumes CO2 at a rate of ∼44 and ∼42–48 mol m−2 ky−1 respectively, while degradation of ancient organic matter releases CO2 at a rate of ∼1.3 mol m−2 ky−1. Silicate dissolution at the shallow soils is facilitated by low pH and high soil pCO2. As ankerite dissolution and organic matter oxidation are shown to occur early during shale alteration, CO2 consumption by shale weathering is thus limited by initiation of rock disintegration (e.g., fractures) and exposure of fresh surface area to infiltrating CO2- and O2-rich water." @default.
- W2087344050 created "2016-06-24" @default.
- W2087344050 creator A5002506741 @default.
- W2087344050 creator A5017614324 @default.
- W2087344050 creator A5019539210 @default.
- W2087344050 creator A5054784858 @default.
- W2087344050 creator A5059226320 @default.
- W2087344050 creator A5074395966 @default.
- W2087344050 creator A5079879226 @default.
- W2087344050 creator A5087130372 @default.
- W2087344050 creator A5090439825 @default.
- W2087344050 date "2014-10-01" @default.
- W2087344050 modified "2023-10-15" @default.
- W2087344050 title "The CO 2 consumption potential during gray shale weathering: Insights from the evolution of carbon isotopes in the Susquehanna Shale Hills critical zone observatory" @default.
- W2087344050 cites W1487133334 @default.
- W2087344050 cites W1508635819 @default.
- W2087344050 cites W1579071281 @default.
- W2087344050 cites W1606493305 @default.
- W2087344050 cites W1674999223 @default.
- W2087344050 cites W1817088834 @default.
- W2087344050 cites W182749682 @default.
- W2087344050 cites W1912054937 @default.
- W2087344050 cites W1965323884 @default.
- W2087344050 cites W1966067411 @default.
- W2087344050 cites W1968654664 @default.
- W2087344050 cites W1977439967 @default.
- W2087344050 cites W1981633163 @default.
- W2087344050 cites W1983088059 @default.
- W2087344050 cites W1984396271 @default.
- W2087344050 cites W1986207920 @default.
- W2087344050 cites W1986916739 @default.
- W2087344050 cites W1987480248 @default.
- W2087344050 cites W1989278070 @default.
- W2087344050 cites W1990357248 @default.
- W2087344050 cites W1991620953 @default.
- W2087344050 cites W1992797621 @default.
- W2087344050 cites W1996167059 @default.
- W2087344050 cites W1998051218 @default.
- W2087344050 cites W2008587428 @default.
- W2087344050 cites W2015632520 @default.
- W2087344050 cites W2015912399 @default.
- W2087344050 cites W2018653465 @default.
- W2087344050 cites W2019234824 @default.
- W2087344050 cites W2020110632 @default.
- W2087344050 cites W2020228038 @default.
- W2087344050 cites W2020921074 @default.
- W2087344050 cites W2021942297 @default.
- W2087344050 cites W2024770850 @default.
- W2087344050 cites W2024818652 @default.
- W2087344050 cites W2028267353 @default.
- W2087344050 cites W2030783973 @default.
- W2087344050 cites W2031763456 @default.
- W2087344050 cites W2034401641 @default.
- W2087344050 cites W2034575670 @default.
- W2087344050 cites W2034578691 @default.
- W2087344050 cites W2037400051 @default.
- W2087344050 cites W2039569469 @default.
- W2087344050 cites W2040122746 @default.
- W2087344050 cites W2040890506 @default.
- W2087344050 cites W2041737031 @default.
- W2087344050 cites W2042895971 @default.
- W2087344050 cites W2043721446 @default.
- W2087344050 cites W2046548325 @default.
- W2087344050 cites W2047695035 @default.
- W2087344050 cites W2047850128 @default.
- W2087344050 cites W2050042705 @default.
- W2087344050 cites W2056474046 @default.
- W2087344050 cites W2057296492 @default.
- W2087344050 cites W2057858806 @default.
- W2087344050 cites W2058603488 @default.
- W2087344050 cites W2063486414 @default.
- W2087344050 cites W2064655658 @default.
- W2087344050 cites W2064832333 @default.
- W2087344050 cites W2067003680 @default.
- W2087344050 cites W2071390384 @default.
- W2087344050 cites W2071517452 @default.
- W2087344050 cites W2071752944 @default.
- W2087344050 cites W2081159792 @default.
- W2087344050 cites W2094931011 @default.
- W2087344050 cites W2103137479 @default.
- W2087344050 cites W2104394650 @default.
- W2087344050 cites W2108531617 @default.
- W2087344050 cites W2108732658 @default.
- W2087344050 cites W2114377783 @default.
- W2087344050 cites W2124063354 @default.
- W2087344050 cites W2126201443 @default.
- W2087344050 cites W2128239598 @default.
- W2087344050 cites W2130248258 @default.
- W2087344050 cites W2137085171 @default.
- W2087344050 cites W2139452943 @default.
- W2087344050 cites W2140110924 @default.
- W2087344050 cites W2141012977 @default.
- W2087344050 cites W2147023985 @default.
- W2087344050 cites W2154305513 @default.
- W2087344050 cites W2160321193 @default.
- W2087344050 cites W2162966874 @default.
- W2087344050 cites W2334796688 @default.
- W2087344050 cites W4231136271 @default.