Results 11 to 20 of about 200 (171)
Magnetic petrology of the Neoarchean granitoids in the Vila Jussara Suite, Carajás Province, Amazonian Craton [PDF]
Brazilian Journal of Geology, 2022 The Vila Jussara Suite (VJS) is formed by Neoarchean (~ 2.75 Ga) granites that are located in the Sapucaia Domain of the Carajás Province (CP), Amazonian Craton.
Luan Alexandre Martins de Sousa +4 more
doaj +1 more source
Journal of the Geological Survey of Brazil, 2022 Archean and Paleoproterozoic granitoids with different geochemical affinities are widely distributed in the basement of high-grade metamorphic rocks of the Bacajá Domain, which consists of Rhyacian granite-greenstone terrain with Archean-Siderian ...
Cleberson Vieira da Silva +2 more
doaj +1 more source
Paleoproterozoic felsic volcanism of Iricoumé group, Erepecuru-Trombetas domain, Amazonian central province: Field and petrographic characterization and Pb-Pb zircon geochronology [PDF]
Geologia USP. Série Científica, 2013 The Iricoumé group consists of very well preserved pyroclastic and effusive volcanic rocks as a part of an extensive volcano-plutonic event, which marked the central part of the Amazonian craton during the Orosirian. Such rocks occur in the southern part
Lúcia Travassos da Rosa Costa +3 more
doaj +1 more source
Boletín Geológico, 2020 The Guaviare Complex is a new unit defined in the Colombian Amazonian Craton, which is part of the Precambrian basement located in southeastern Colombia.
Carolina Amaya López +8 more
doaj +1 more source
Journal of the Geological Survey of Brazil, 2021 The Querari Complex corresponds to the basement rocks from Uaupés Domain and represents one of the least studied units in the northwest of the Rio Negro Province, Amazonian Craton.
Paulo Jerry Bentes Gomes +4 more
doaj +1 more source
Geosystems and Geoenvironment, 2023 Thermobarometric calculations for mineral inclusions in diamonds provide a systematic comparison of P-T-fO2 conditions for different cratons and mobile belts worldwide, using a database of 4440 mineral EPMA analyses.
Igor Ashchepkov +3 more
doaj +1 more source
Crustal growth in the northeast portion of the Rhyacian Bacajá domain, SE Amazonian craton, based on U-Pb, Lu-Hf, and Sm-Nd data [PDF]
Brazilian Journal of Geology, 2023 The Bacajá domain, southeastern Amazonian craton, comprises Mesoarchaean and Siderian terrains reworked during the Transamazonian cycle. Combined analyses of zircon LA-ICP-MS U-Pb and Lu-Hf with whole-rock Sm-Nd from the northeast portion of this domain ...
Lucas Baía Magalhães +3 more
doaj +1 more source
Boletín Geológico, 2021 The Neoproterozoic igneous rocks found in the municipality of San José del Guaviare include several isolated plutonic bodies that protrude from the Phanerozoic sedimentary cover in belts aligned NW-SE.
Carolina Amaya López +8 more
doaj +1 more source
Journal of the Geological Survey of Brazil, 2021 This paper presents a literature review of the geology of the Alto Rio Negro region, located in northwestern Brazil. Firstly, we summarize the Amazonian Craton tectonic models and how the study area fits in these different tectonic models.
Túlio Amós de Araújo Mendes +4 more
doaj
Geology, petrology, and geochronology of 2.03 to 1.98 Ga arc magmatic granites from the Novo Mundo Complex: implications for the Amazonian Craton tectonic evolution [PDF]
Brazilian Journal of GeologyThe Novo Mundo granitic Complex lies in the southernmost margin of the Amazonian Craton, Brazil. New petrological, geochemical, U–Pb and Sm–Nd isotopic data allow us to propose a new petrogenetic model for granite genesis in the southernmost portion of ...
Adriana Araujo Castro Lopes +3 more
doaj +2 more sources