Gold mineralization in the Mazowe area, Harare-Bindura-Shamva greenstone belt, Zimbabwe: I. Tectonic controls on mineralization |
| |
| Authors: | T G Blenkinsop T Oberthür O Mapeto |
| |
| Institution: | (1) Department of Geology, University of Zimbabwe, P.O. Box MP 167, Harare, Zimbabwe e-mail: tblenki@geology.uz.zw, ZW;(2) Bundesanstalt für Geowissenschaften und Rohstoffe, Stilleweg 2, D-30655 Hannover, Germany, DE;(3) Mazowe Mine, Private Bag 1, Mazowe, Zimbabwe, ZW |
| |
| Abstract: | The Mazowe group of mines (principal mines Mazowe, Bernheim and Stori's Golden Shaft) is situated within the Harare-Bindura-Shamva
greenstone belt of the Zimbabwean Archaean craton, west of the Chinamora batholith. Gold mineralization in the form of quartz
(±sulfide) reefs is structurally controlled in reverse shear zones that dip moderately north at Mazowe mine, and conjugate
steep strike-slip shear zones striking WNW (dextral) and NE (sinistral) at Bernheim and Stori's Golden Shaft mines. The syn-mineralization
deformation (D2/3) in all the mines has a northerly shortening direction. This deformation is compatible with the regional
late Archaean D2/3 event, which agrees with late Archaean ages determined for the host rocks and for the mineralization. The
mineralization cannot be related to any major regional scale shear zones, and it is incompatible with strains related to the
intrusion of either the Chinamora batholith or internal granitoid suites. These observations show that significant gold deposits
can form in relatively minor deformation events, unrelated to either major shear zones or granitoid intrusions.
Received: 30 September 1998 / Accepted: 16 August 1999 |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
