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Representative samples of metamorphic rocks and one sample of undeformed granite from the Elat area of southern Israel have been analyzed by microprobe and conventional 40 Ar/ 39 Ar geochronological methods. The highest-grade metamorphic assemblages, formed during the collision of greater east and west Gondwanaland, give equilibrium P-T conditions of 7+/-1kbar and 650-700...
The Borborema Province in NE Brazil comprises Paleoproterozoic basement and its Proterozoic cover that experienced a complex tectonometamorphic history during the Brasiliano/Pan-African orogeny. In Ceara, four major domains separated by continental-scale, steeply dipping dextral shear zones have been identified. 40 Ar/ 39 Ar step-heating of mineral separates and laser-probe...
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