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Geochronological evidence for tectonically driven brine migration during the Early Proterozoic Kheis Orogeny of southern Africa
Author(s) -
Duane Michael J.,
Kruger F. Johan
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl00917
Subject(s) - orogeny , geology , proterozoic , craton , archean , geochemistry , zircon , tectonics , basement , supercontinent , precambrian , phanerozoic , earth science , petrology , paleontology , cenozoic , structural basin , civil engineering , engineering
The 2.1–1.9 Ga Kheis orogeny on tne western margin of the Kaapvaal Craton of Southern Africa induced regional heating, tilting and extensive fluid flow which isotopically reset and altered rocks and minerals of older Proterozoic formations and parts of the Archean cratonic basement. This tectonic event is recognised in the Ar, Rb‐Sr, Pb‐Pb and U‐Pb (zircon) geochronological and palaeomagnetic studies on the Transvaal and underlying basement rocks.