نتایج جستجو برای: pegmatite
تعداد نتایج: 412 فیلتر نتایج به سال:
The Luís Alves Terrane in southern Brazil is one of the largest expositions Archean to Paleoproterozoic units that acted as basement for development Neoproterozoic Pan-African/Brasiliano orogenic belts Mantiqueira Province, South America. Combined field observations, petrography, Hf and U-Pb LA-ICP-MS zircon titanite isotopic data are presented this terrane. dataset spans a large time range wit...
IN a previous account (Brown, ~967) of the granitic sheets and veins in the Loch Coire migmatite complex, a metasomatic origin was postulated. This has now been confirmed by new analyses. Read (I93I) described the Loch Coire complex as made of three zones; one of unmigmatized meta-sediments, one of granitic veins and one of 'injection' or migmatite. The sheets and veins of granite (sensu lato),...
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