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Geologic Framework Development in Fractured Bedrock EPA Region II Fractured Rock Training January 14, 2014 Pierre Lacombe
2 Geologic Framework Development in Sedimentary rocks  Basic Concepts  Regional, local and site geology  Purpose for framework  Iteratively developed, dynamic, not static  Requires maps and sections  Sources and sink,  Fracture genesis  Mineral assemblage  Surface water
3 Zone E: fill and soil Zone D: upper, in situ site; saprolite, rock is oxidized. Fractures, faults and joints are open, high primary and high secondary porosity, …grades to zone C Zone C: middle, in situ site; many open bedding fractures;. Orthorhombic, strata- bound joints and fractures are open and/or interconnected in places, medium primary and medium secondary porosity, grades to zone B Zone B: basal, in situ site; weakly opened fractures predominated bedding plain faults and partings, low primary and low secondary porosity, grades to zone E. Zone A: below, in situ site; virtually no open fractures, or partings, low primary and very low secondary porosity. Basic Concepts Rock type strata Lithostatic pressure strata Weathering strata
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