Tuesday, February 12, 2013

Highlights—Dolomite: It’s the Fault’s Fault

A unique aspect of carbonate platforms is their ability to develop flanks with gradients that exceed the angle of repose due to early cementation and binding.  Frost et al. document a Permian example of an oversteepened carbonate platform margin that was impacted by early syndepositional deformation.  A suite of field, petrographic, and stable isotopic data reveal that these early fractures and faults also facilitated the flow of early dolomitizing fluids.  These results are interpreted to reveal a spatially and temporally complex alteration of host limestone that led to bed-scale heterogeneity in dolomite patterns and petrophysical properties.

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