Petrology of Gameleira potassic lamprophyres, São Francisco Craton
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چکیده
منابع مشابه
Chemostratigraphy of the lower Bambuí Group , southwestern São Francisco Craton
Manuscript ID: 30285: Received in: 04/21/2015. Approved in: 02/12/2016. ABSTRACT: The Bambuí Group, the most extensive carbonate-siliciclastic cover on the São Francisco craton, has been a matter of debate because of its potential correlations to global glacial events. Unfortunately, most available chemostratigraphic data came from samples collected on surface rock exposures, ever susceptible t...
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Both highand medium-pressure granulites have been found as because of the absence of modal minerals. The combination of petrographic textures, mineral compositions, metamorphic reaction enclaves and boudins in tonalitic–trondhjemitic–granodioritic gneisses in the Hengshan Complex. Petrological evidence from these history, petrogenetic grids and thermobarometric data defines a nearrocks indicate...
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Compressed organic-walled microfossils attributable to five filamentous taxa, and ten coccoidal eight, (taxa originally spheroidal forms and two originally ellipsoidal, colonial forms), all having long time-ranges in the Proterozoic, have been identified in fine-grained siliciclastic sediments in cores from four bore holes cutting subsurface equivalents of the Mesoproterozoic Conselheiro Mata G...
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ژورنال
عنوان ژورنال: Anais da Academia Brasileira de Ciências
سال: 2012
ISSN: 1678-2690,0001-3765
DOI: 10.1590/s0001-37652012005000030