SHEATH-FOLD-LIKE STRUCTURES IN PSEUDOTACHYLYTES

被引：45

作者：

BERLENBACH, JW ^{[1
]}

ROERING, C ^{[1
]}

机构：

[1] RAND AFRIKAANS UNIV,DEPT GEOL,JOHANNESBURG,SOUTH AFRICA

来源：

JOURNAL OF STRUCTURAL GEOLOGY | 1992年 / 14卷 / 07期

关键词：

D O I：

10.1016/0191-8141(92)90045-X

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Sheath-fold-like structures in pseudotachylyte samples from a gold mine in the Witwatersrand Basin (South Africa) are explained by injections of frictionally produced silicate melt within the shear zone due to the formation of high and low pressure zones. If the shear zone geometry is known, the orientation of the fold closures can be used to determine the direction and the movement sense. However, if it is not possible to establish the shear zone geometry, only the azimuth of movement can be estimated from the orientation of the sheath-fold-like folds. The flow banding in these fault rocks is indicative of laminar flow, which suggests a low Reynold's number.

引用

页码：847 / 856

页数：10

共 26 条

[11]

MADDOCK RH, 1983, GEOLOGY, V11, P105, DOI 10.1130/0091-7613(1983)11<105:MOOFPD>2.0.CO

[12]

[13] FRICTIONAL MELTING IN LANDSLIDE-GENERATED FRICTIONITES (HYALOMYLONITES) AND FAULT-GENERATED PSEUDOTACHYLYTES - DISCUSSION [J].

MADDOCK, RH .

TECTONOPHYSICS, 1986, 128 (1-2) :151-153

[14] 40AR-39AR DATING OF PSEUDOTACHYLITE FROM THE VREDEFORT DOME, SOUTH-AFRICA - A PROGRESS REPORT [J].

REIMOLD, WU ;

JESSBERGER, EK ;

STEPHAN, T .

TECTONOPHYSICS, 1990, 171 (1-4) :139-152

[15] THE VREDEFORT STRUCTURE - A PERSPECTIVE WITH REGARD TO NEW TECTONIC DATA FROM ADJOINING TERRANES [J].

ROERING, C ;

BARTON, JM ;

WINTER, HD .

TECTONOPHYSICS, 1990, 171 (1-4) :7-22

[16]

Roering C, 1984, T GEOL SOC S AFR, V87, P87

[17] VISCOSITY OF BASIC MAGMAS AT VARYING PRESSURE [J].

SCARFE, CM .

NATURE-PHYSICAL SCIENCE, 1973, 241 (109) :101-102

[18]

SCHWARZMAN EC, 1983, GEOL SOC AM BULL, V94, P926, DOI 10.1130/0016-7606(1983)94<926:PFTVRS>2.0.CO

[19]

[20]

Shand S.J., 1916, J GEOL SOC LONDON, V72, P198, DOI [10.1144/GSL.JGS.1916.072.01-04.12, DOI 10.1144/GSL.JGS.1916.072.01-04.12]

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