A deep crustal electromagnetic sounding in the Georgia Piedmont

作者: B. G. Thompson , A. Nekut , A. F. Kuckes

DOI: 10.1029/JB088IB11P09461

关键词:

摘要: Electromagnetic soundings in the Georgia Piedmont using a horizontal loop source indicate an upper layer with conductivity variations from less than 2×10−5 to 2.5×10−4 S/m extending about 15 km, underlain by zone of more 10−3 S/m. At one site conductance any intermediate is limited 2 S depth km. The conductivities agree those expected surface geology, and increase occurs at which correlates generally reflections detected Consortium for Continental Reflection Profiling's seismic profile area. A possible high water saturated sediments trapped when region was overthrust Appalachian orogeny.

参考文章(15)
W. F. Brace, Resistivity of Saturated Crustal Rocks to 40 Km Based on Laboratory Measurements Geophysical Monograph Series. ,vol. 14, pp. 243- 255 ,(2013) , 10.1029/GM014P0243
Gary R. Olhoeft, Electrical properties of granite with implications for the lower crust Journal of Geophysical Research. ,vol. 86, pp. 931- 936 ,(1981) , 10.1029/JB086IB02P00931
T. Cantwell, J. N. Galbraith, P. Nelson, Deep resistivity results from New York and Virginia Journal of Geophysical Research. ,vol. 69, pp. 4367- 4376 ,(1964) , 10.1029/JZ069I020P04367
Jean-Claude Mareschal, James Musser, Richard C. Bailey, Geomagnetic variation studies in the southern Appalachians: preliminary results Canadian Journal of Earth Sciences. ,vol. 20, pp. 1434- 1444 ,(1983) , 10.1139/E83-129
J. E. P. Connerney, A. F. Kuckes, Gradient analysis of geomagnetic fluctuations in the Adirondacks Journal of Geophysical Research. ,vol. 85, pp. 2615- 2624 ,(1980) , 10.1029/JB085IB05P02615
A. Nekut, J. E. P. Connerney, A. F. Kuckes, Deep crustal electrical conductivity; Evidence for water in the lower crust Geophysical Research Letters. ,vol. 4, pp. 239- 242 ,(1977) , 10.1029/GL004I006P00239
J. E. P. Connerney, A. Nekut, A. F. Kuckes, Deep crustal electrical conductivity in the Adirondacks Journal of Geophysical Research. ,vol. 85, pp. 2603- 2614 ,(1980) , 10.1029/JB085IB05P02603
L. BROWN, C. ANDO, S. KLEMPERER, J. OLIVER, S. KAUFMAN, B. CZUCHRA, T. WALSH, YNGVAR W. ISACHSEN, Adirondack-Appalachian crustal structure: The COCORP Northeast Traverse Geological Society of America Bulletin. ,vol. 94, pp. 1173- 1184 ,(1983) , 10.1130/0016-7606(1983)94<1173:ACSTCN>2.0.CO;2
Friedemann Freund, Mechanism of the water and carbon dioxide solubility in oxides and silicates and the role of O? Contributions to Mineralogy and Petrology. ,vol. 76, pp. 474- 482 ,(1981) , 10.1007/BF00371490