【英文】美国裂缝性水文地质分布特征

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【格式】ppt
【页数】55页
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1

Aquifers of the U.S. Fractured RockAquifers of the U.S.

2 Fractured Systems Crystalline rock; Piedmont, Shield, Batholiths Carbonates; FL, Valley and Ridge, Mid- continent, MT, NV, TX Basalts; Columbia River Plateau, Snake River Plateau, Hawaii Felsic volcanics; Basin and Range Sandstone; Mid-continent, CO Plateau, VandR Till (confining unit); mid-continent

3 Important Information Background: Location, Lithology, Tectonic history Fracture and matrix characteristics Storage and transmission properties Flow system Distribution of major fluxes (Recharge, Baseflow, ET, Precip, Stormflow, Runoff) Water Quality

4 Piedmont and Blue Ridge Crystalline rocks with glacial cover

5 Paleozoic history of southern Piedmont From Hatcher Penobscottian Taconic Acadian Alleghanian

10http://geoweb.gg.utk.edu/Geology/Faculty/Hatcher/Hatcher.html

11 Metamorphic and igneous rock Sandstone and diabase in rift basins Limestone Folded and faulted sedimentary rock

13 Fault zone, tectonic Thrust fault, tectonic Sheet joints, young Fabric=bedding + tectonic Includes complex folds Faults and joints; tectonic + young? Topography and weathering Fabric and fractures

15 Transition Fractured metamorphic and igneous rock Saprolite

16 Gneiss, schist bedrock Granite or other intrusive bedrock Distinct transition Gradational transition

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