Authors: ShaoFeng Dong DaiZhao Chen HaiRuo Qing MaoSheng Jiang XiQiang Zhou
Publish Date: 2013/04/12
Volume: 58, Issue: 23, Pages: 2877-2882
Abstract
Detailed characterization of diagenetic fluid behaviour and evolution is commonly hindered by shortage of appropriate and economic methods to carry out in situ analysis in the tiny diagenetic mineral crystals Using micromill sampling method this study presents in situ stable isotopic data for the growth zones of saddle dolomite crystals in the hydrothermallyaltered dolostones of Upper Cambrian Furongian at Keping Tarim Basin NW China These data show minor and large variations in δ 13C −07‰ to −15‰ VPDB and δ 18O −83‰ to −138‰ VPDB respectively from the cores to outer rims of the dolomite crystals and suggest that saddle dolomites precipitated from dolomitizing fluids with similar carbon sources but oscillatory temperatures during different formation stages This scenario is confirmed by microthermometry of fluid inclusions within the growth zones of dolomite crystals This study indicates that in situ isotope analysis could provide more detailed information related to the source and pathway of dolomitizing fluids facilitating better characterization of dolomitizing fluids and processesThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team
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