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Structural and P-T Evolution of a Major Cross Fold in the Central Zone of the Limpopo High-Grade Terrain, South Africa |
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| Authors: | VAN REENEN D D; PERCHUK L L; SMIT C A; VARLAMOV D A; BOSHOFF R; HUIZENGA J M; GERYA T V |
| Institution: | 1 DEPARTMENT OF GEOLOGY, RAND AFRIKAANS UNIVERSITY, P.O. BOX 524, AUCKLAND PARK, 2006, JOHANNESBURG, SOUTH AFRICA 2 DEPARTMENT OF PETROLOGY, GEOLOGICAL FACULTY, MOSCOW STATE UNIVERSITY, VOROBIEVY GORY, MOSCOW, 119899 RUSSIA 3 INSTITUTE OF EXPERIMENTAL MINERALOGY, RUSSIAN ACADEMY OF SCIENCES, CHERNOGOLOVKA, MOSCOW DISTRICT, 142432, RUSSIA 4 INSTITUT FÜR GEOLOGIE, MINERALOGIE UND GEOPHYSIK, FAKULTÄT FÜR GEOWISSENSCHAFTEN, RUHR-UNIVERSITÄT-BOCHUM, 44780 BOCHUM, GERMANY |
| Abstract: | The Central Zone (CZ) of the Limpopo Complex of southern Africais characterized by a complex deformational pattern dominatedby two types of fold geometries: large sheath folds and crossfolds. The sheath folds are steeply SSW-plunging closed structureswhereas the cross folds are north–south-oriented withnear-horizontal fold axes. In the area south of Messina thiscomplexly folded terrain grades continuously towards the southinto a crustal-scale ENE–WSW-trending ductile shear zonewith moderate dip towards the WSW. All sheath folds documentconsistent top-to-the-NE thrust movement of high-grade material.The timing of this shear deformational event (D2) and thus ofthe gneissic fabric (S2) is constrained (at |
| Keywords: | : deformation granulites Limpopo Complex geothermobarometry mineral equilibrium mineral thermodynamics P– T path |
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