microcline
National Institutes of Health
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The Itabaiana Dome is inserted in the Vaza Barris Domain of the Sergipano Belt, in the state of Sergipe, Brazil. It comprises an…
schlieren, while the post-F3 granites essentially have microgranular enclaves. Syn- to late-F3 granites are mainly alkali-calcic…
K feldspar megacrysts are very common in granitic rocks. They could be either microcline or monoclinic orthoclase, and their…
The occurrence of rounded grains of uraninite and pyrite in pre-2.2 Ga quartz-pebble conglomerate deposits represents key…
Experimental studies show that K replacement of Na in triclinic plagioclase under hydrothermal conditions results directly in…
The potassium feldspar variety adularia was found in the Davi and Joel primary gold prospects located in the Tapajos Mineral…
QUIMICA DE PIROXENIOS E ANFIBOLIOS DE SIENITOS PERALCALINOS ULTRAPOTASSICOS E PIROXENITOS ASSOCIADOS. NORDESTE DO BRASIL: UM…
This report summarizes the geology, concentrating on the Proterozoic rocks, of a 1,280-square-mile (3,300-square-kilometer) area…
It was possible to follow the disordering path ot a microcline microperthite, with bulk grain composition OrulAbas, by…
__________________________________________ Ol Introduction _______________________________________ 1…