Upper-crustal strength inferred from stress measurements to 6 km depth in the KTB borehole

A study estimated the magnitude of stresses in the KTB borehole in southern Germany. Results indicate a high-strength upper crust in which the state of stress is in equilibrium with its frictional strength.

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Bibliographic Details
Published in:	Nature (London) Vol. 365; no. 6447; pp. 633 - 635
Main Authors:	Zoback, Mark D, Apel, R, Baumgärtner, J, Brudy, M, Emmermann, R, Engeser, B, Fuchs, K, Kessels, W, Rischmüller, H, Rummel, F, Vernik, L
Format:	Journal Article
Language:	English
Published:	London Nature Publishing 14-10-1993 Nature Publishing Group
Subjects:	Boreholes Earth sciences Earth, ocean, space Engineering and environment geology. Geothermics Engineering geology Exact sciences and technology Geology Tectonics. Structural geology. Plate tectonics Europe Germany hydraulic fracturing Variscan phase Paleozoic stress upper crust boreholes strength lithosphere continental crust metamorphic rocks
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Description
Summary:	A study estimated the magnitude of stresses in the KTB borehole in southern Germany. Results indicate a high-strength upper crust in which the state of stress is in equilibrium with its frictional strength.
ISSN:	0028-0836 1476-4687
DOI:	10.1038/365633a0