Results 81 to 90 of about 62,283 (208)

Deformation and Sediment Provenance of the Forearc Basin in the Central Andes of Southern Peru

open access: yesTectonics, Volume 44, Issue 8, August 2025.
Abstract The linkages between the development of the forearc regions and the accompanying retroarc in contractional mountain belts remain unclear. In the central Andes of southern Peru, new results constrain the timing of deformation and the provenance of forearc basin fill during Cenozoic mountain building.
Brenden J. Britt, Nicholas D. Perez
wiley   +1 more source

Reassessment of the geology of the southeastern Tapajós Gold Province, Amazonian Craton, Brazil, based on field, petrographic, and airborne geophysical data

open access: yesJournal of the Geological Survey of Brazil, 2019
The Tapajós Gold Province, central portion of the Amazonian Craton, is one of the main metallogenic provinces in Brazil, but lack geological studies at an appropriate scale in its southeastern portion. Fieldwork, petrography, and high-resolution airborne
Stella Bijos Guimarães   +2 more
doaj   +1 more source

The growth of the Zimbabwe craton during the Neoarchaean

open access: yes, 2023
New geochemical data demonstrate the similarity between Neoarchaean TTGs found in the middle crust of the Zimbabwe Craton and the lower crust of the Northern Marginal Zone of the Limpopo Belt. Hence the Neoarchaean segment of the Zimbabwe Craton provides
Rollinson, H.
core   +1 more source

Influence of drainage status on soil and water chemistry, litter decomposition and soil respiration in central Amazonian forests on sandy soils [PDF]

open access: yes, 2011
Central Amazonian rainforest landscape supports a mosaic of tall terra firme rainforest and ecotone campinarana, riparian and campina forests, reflecting topography-induced variations in soil, nutrient and drainage conditions.
Berton Zanchi, F.   +4 more
core   +1 more source

Mineralizing Events of the World-Class Volta Grande Gold Deposit, Southeastern Amazonian Craton, Brazil

open access: yes, 2021
The southeastern region of the Amazonian Craton has been the target of several metallogenetic surveys, which recently led to the identification of the world-class Volta Grande gold deposit with gold reserves of ~3.8 Moz at 1.02 g/t.
Souza   +4 more
core   +1 more source

Geochemical and tectonic setting of mafic dyke swarms of the Juruena-Teles Pires mineral province, southwestern Amazonian craton, Brazil

open access: yesJournal of the Geological Survey of Brazil
The present study provides a comprehensive set of whole-rock geochemical, petrographic, and mineral chemistry data on diabase dyke swarms that crosscut the Archean/Paleoproterozoic basement of the Peixoto de Azevedo domain, located in the central ...
Gilmar Rizzotto, Cléber Alves
doaj   +1 more source

Bob Craton and Mike Koch

open access: yes, 2013
Bob Craton, Upland, IN, provides a brief history of Russia and eastern Europe. Mike Koch, Upland, IN, shares his testimony of working with Operation Mobilization and bringing the Bible to Russia and eastern ...
Craton, Bob, Koch, Mike
core  

Tectonic evolution of the southern margin of the Amazonian craton in the late Mesoproterozoic based on field relationships and zircon U-Pb geochronology

open access: yesAnais da Academia Brasileira de Ciências, 2014
New U-Pb zircon geochronological data integrated with field relationships and an airborne geophysical survey suggest that the Nova Brasilândia and Aguapeí belts are part of the same monocyclic, metaigneous and metasedimentary belt formed in the late ...
GILMAR J. RIZZOTTO   +3 more
doaj   +1 more source

Zircon geochronology of granitoids from the western Bacajá domain, southeastern Amazonian craton, Brazil

open access: yes, 2008
New zircon U–Pb SHRIMP and Pb-evaporation data on rocks from the west part of the Bacaj´a domain, southeastern Amazonian craton, reveal crustal evolution marked by a succession of magmatic events from Neoarchean to Orosirian.
VASQUEZ, Marcelo L.   +2 more
core  

Geophysical contribution for the study of the Granitic Batholit Santa Helena, southwest of the Amazonian Craton [PDF]

open access: yesGeologia USP. Série Científica, 2012
The Santa Helena batholith is subject of many controversies concerning its geographical extension, lithological constitution,geochemical characterization and geotectonic setting.
Vanessa Biondo Ribeiro   +1 more
doaj  

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