Dolomite recrystallization revealed by Δ47/U-Pb thermochronometry in the Upper Jurassic Arab Formation, United Arab Emirates
نویسندگان
چکیده
Abstract The process of recrystallization affecting dolomitic successions remains a longstanding enigma in carbonate research. Recrystallization influences the accuracy genetic dolomitization models as well prediction porosity and permeability distribution within reservoirs. We investigate early-formed dolomites Upper Jurassic Arab Formation reservoir (Arabian Platform, United Emirates), where is not easily ascertained based on petrographic O-C-Sr isotope analyses. Conversely, application Δ47/U-Pb thermochronometry revealed occurrence burial over temperature-time interval ~45 °C/45 m.y. during Early Late Cretaceous. was initially driven by mixed marine-meteoric fluids, which evolved closed hydrologic system remained thermal equilibrium with host rocks. stepwise succession heterogeneously, so that samples only few meters apart presently record different stages stopped when hydrocarbons migrated into reservoir. Our results illustrate how may provide novel approach to unravel dolomite precisely determine timing physicochemical conditions (temperature δ18Ow) characterized process. Therefore, this study paves way for better appraisal
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ژورنال
عنوان ژورنال: Geology
سال: 2023
ISSN: ['0091-7613', '1943-2682']
DOI: https://doi.org/10.1130/g50960.1