کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8863181 | 1620201 | 2018 | 47 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Petrographic and stable isotopic evidences of CO2-induced alterations in sandstones in the Lishui sag, East China Sea Basin, China
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Dawsonite-bearing sandstones in the Lishui sag, East China Sea Basin, China, have been investigated as a natural occurrence for CO2-induced diagenesis using petrography, X-ray diffraction and stable isotopes. The sandstones are predominantly litharenite, with the order of cements growth comprising clay coatings and pyriteâ
, siderite, pyriteâ
¡, quartz overgrowths, ankerite, kaolinite and microcrystalline quartz, dawsonite and late calcite. Dawsonite, which has recently been considered as trapping mineral after massive CO2 charging, constituted up to 7% of the whole rock volume, occurring as pore-filling clusters or replacement of detrital grains. Stable isotopic data suggest that the CO2 in equilibrium with dawsonite and calcite display a mantle-magmatic origin and is in close proximity to those of the CO2 gas now present in the reservoir, indicating the same origin for both. The elevated CO2 concentrations induced by a mass influx of magmatic CO2 into host rock was favourable for dawsonite cementation. Plagioclase was then considered as the precursor of dawsonite. K-feldspar could also serve as the aluminum source of dawsonite with an external supply of Na+ in a geochemically open system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Geochemistry - Volume 90, March 2018, Pages 115-128
Journal: Applied Geochemistry - Volume 90, March 2018, Pages 115-128
نویسندگان
Shuang Zhao, Li Liu, Na Liu,