By Mohammed S. Ameen
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Extra resources for Fractography: fracture topography as a tool in fracture mechanics and stress analysis
2A-C) appear in cores of all kinds of rock. Besides the CDS, all other coring-induced fractures perpendicular to the core axis, with UFS, represent the second, and considerably more common, group (Fig. 2A-C). Their rough fractographic pattern is arranged on a surface (Figs 7-9) without the trough morphology of type D. They often initiate in the centre of the core and grow in regular fashion with plumes, hackles and arrest lines, terminating in twist-hackle fringes (Fig. 2A & B). Mostly, the fringe tilts from the opposite sides of the main plane in opposite directions, as can be seen in Fig.
10a and b Hg. ~. Fig. 4 t-lg. 14c b2 --8000 M b4 --9000 -8000 b3 b5 Metabasites -9000 b6 Co) Fig. 1. (a) Geological map of the western part of the Bohemian Massif (after Weber 1985). Broken line: boundary between Saxothuringian and Moldanubian Zones. (b) Interpretation of the drilled profile in a SW-NE section near the southwest boundary of the Bohemian Massif (after Hirschmann 1993). The drilling was finished at a depth of 9100m. SE1 and SE2 are strong reflectors in the reflection seismic profile crossing the KTB.
Zeitschrift flit Geologische Wissenschaften, 22, 97-114. , FUCHS, K. & ZOBACK, M. D. 1993. Stress orientation profile to 6 km depth in the KTB main borehole. KTB Report 93-2, 195-197. DYKE, C. G. 1989. Core disking: Its potential as an indicator of principal in situ stress directions. In: MAURY, V. & FOURMAINTI~UX, O. (eds) Rock at Great Depth. Balkema, Rotterdam, 10571064. HIRSCHMANN, G. 1993. Seismischer Reflektor SE1 erbohrt - und was folgt darunter? 6. 1993, GieBen, 63-64. HODGSON, R. A. 1961.