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Showing 1 to 11 of 11 for “"Blue Ridge Province"”.
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Age and petrogenesis of the Striped Rock granite pluton: Blue Ridge province, southwestern Virginia
… similar to those presently exposed in the Blue Ridge province. Isotopic data also suggest that it is unlikely that the Striped Rock granite formed by simple differentiation of a mantle derived melt. Of the many models proposed for the petrogenesis of A-type granites the models that are most …
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Evaluation of Spring Discharge for Characterization of Groundwater Flow in Fractured Rock Aquifers: A Case Study from the Blue Ridge Province, VA
Recent models of groundwater flow in the Blue Ridge Province suggest multiple aquifers and flow paths may be responsible for springs and seeps appearing throughout the region. Deep confined aquifers and shallow variably confined aquifers may contribute water to spring outlets, resulting in vastly …
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Aquifer Characterization in the Blue Ridge Physiographic Province
Existing models of the hydrogeology in the Blue Ridge Province in the eastern United States generally assume a simplified two-layered system consisting of shallow unconsolidated and relatively homogeneous and porous regolith with a water-table aquifer that slowly supplies water downward to the …
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A geophysical study of the earth's crust in central Virginia with implications for lower crustal reflections and Appalachian crustal structure
… crust which is consistent with an allochthonous Blue Ridge Province, possibly with underlying thrust sheets, and a basal decollement at about 9 km (3 sec) depth. Immediately east of the Blue Ridge province, the Appalachian structures plunge to up to 12 km (4 sec) depth where their interpretation …
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Geochemical and petrologic study of the Fries-Rockfish Valley Fault near Roanoke, Virginia
The Blue Ridge Province in southern and central Virginia is a complex slice of Precambrian basement emplaced on the margin of Laurentia during collisional events in the Paleozoic. This allochthonous basement is composed of Middle Proterozoic continental crust, Late Proterozoic intrusives, and Late …
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Deformation in the striped rock pluton, southwest Virginia
… is located beneath the Fries Thrust zone in the Blue Ridge province of southwest Virginia. The multiphase granite pluton has been affected by episodes of brittle and crystal plastic deformation at both the microscopic and mesoscopic scales. Brittle deformation preceded and postdated crystal …
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Structural framework of the Fries fault zone south of Riner, Virginia
… Paleozoic rocks of the western Blue Ridge province. This work presents an analysis of the field relationships and finite strain patterns within the fault zone, and further relates these features to an interpretation of its structural framework. A geologic map of the fault zone is …
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Physical Investigation of Field Scale Groundwater Recharge Processes in the Virginia Blue Ridge Physiographic Province
… with regional thrust faulting within the Blue Ridge Province. Recharge rates appear to be correlated to spatial variation in the hydraulic conductivity of the regolith, which has been influenced by weathering rates and the metamorphic and structural history of the underlying parent …
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Fluid evolution during metamorphism and uplift of the massive sulfide deposits at Ducktown, Tennessee, U.S.A.
… the southeastern corner of Tennessee within the Blue Ridge Province of the southern Appalachians, contains some of the largest metamorphosed pyrrhotite-pyrite-rich massive sultide deposits in the Appalachian-Caledonian orogen. Oxygen isotope temperatures of 530±20°C are consistent with previous …
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Pedogenesis and geomorphic implications of soils developed on Blue Ridge alluvial fans, Virginia
Alluvial fans along the western footslopes of the Blue Ridge province, Virginia range over a linear distance of at least 200 km and spread westward up to 4.8 km. Certain soils formed on the fans appear old and highly weathered. Little detailed physical, chemical, or mineralogical data is available …
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Geology and mineral resources of the Goose Creek area near Roanoke, Virginia
… faulted Precambrian and Paleozoic rocks of the Blue Ridge and Great Valley physiographic provinces. The Precambrian rocks are divided into three different types of gneisses on the basis of their textures. These are unconformably overlain by Cambrian rocks of the Unicoi formation, Hampton shale, …