Results 81 to 90 of about 848 (205)

Origin and evolution of the Amazonian craton

, 1986
The Amazonian craton appears to be formed and modifed by processes much like those of the better-known Precambrian cratons, but the major events did not always follow conventional sequences nor did they occur synchronously with those of other cratons ...
Wirth, K. R., Gibbs, A. K.
core  

The Role of Transpressional Tectonics, Volcanism, and Fluvial Processes on the Oligocene to Pliocene Evolution of Intermontane Basins of the Western Colombian Andes

Tectonics, Volume 44, Issue 3, March 2025.
Abstract We use new and published detrital zircon U‐Pb data (n > 10,000) from Oligocene‐Pliocene strata of intermontane basins of the western Colombian Andes and surrounding regions to study the evolution of sedimentary systems during the transition from arc collision/accretion to subduction.
Santiago León, Claudio Faccenna, Ethan M. Conrad, Mauricio Parra, Andrés L. Cárdenas, Víctor A. Valencia   +5 more
wiley   +1 more source

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

Journal 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

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

Anais 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, LÉO A. HARTMANN, JOÃO O.S. SANTOS, NEAL J. MCNAUGHTON   +3 more
doaj   +1 more source

Geology, geochemistry and Sr-Nd isotopes of the Rio Branco Suite, Nova Brasilândia belt in southwest of the Amazonian Craton: Evidence of a Rodinia pre-assembly accretionary phase (ca. 1137 and 1106 Ma) during the evolution of the Nova Brasilândia orogeny

, 2020
Geochemical (whole rock) and isotopic Sr-Nd (whole rock) data obtained from Rio Branco Suite metamafic rocks, Nova Brasilândia belt, southwest region of the Amazonian ...
Quadros, M (via Mendeley Data)
core   +1 more source

The NW Amazonian Craton in Guainía and Vaupés departments, Colombia: Evidence of a Mesoproterozoic thermal event from apatite LA-ICP-MS U-Pb geochronology and its relation to continental rifting

, 2023
International audienceNew U-Pb LA-ICP-MS apatite ages in E-Colombian rocks and previously obtained U-Pb LA-ICP-MS zircon ages allow us to reconstruct the tectonomagmatic history of the NW-Amazonian Craton during the Mesoproterozoic.
Franco Victoria, Jose A., Cramer, Thomas, Piraquive, Alejandro, de Grave, Johan, Nachtergaele, Simon, Johan De Grave, Nathan Cogné, Cogné, Nathan, Alejandro Piraquive, Jose A. Franco Victoria, Thomas Cramer, Simon Nachtergaele, Bonilla, Amed, Franco Victoria, Jose, Amed Bonilla   +14 more
core   +1 more source

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

Geologia 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, Marta Silvia Maria Mantovani   +1 more
doaj  

Favorability potential for IOCG type deposits in the Riacho do Pontal Belt: new insights for identifying prospects of IOCG-type deposits in NE Brazil

Brazilian Journal of Geology, 2018
: Archean iron oxide-copper-gold (IOCG) deposits have been systematically described in the world class Carajás IOCG district, Amazonian region of Brazil. More recently, several Neoproterozoic (ca 1.13 to 0.96 Ga) IOCG deposits have been identified in the
Sérgio Roberto Bacelar Hühn, Adalene Moreira Silva   +1 more
doaj   +1 more source

Paleomagnetism of paleoproterozoic mafic and felsic volcanic rocks of the Rio Negro-Juruena Province, Southwestern Amazonian Craton, Brazil

, 2007
Several paleogeographic configurations for the Amazonian Craton have been suggested along its geological history. Paleomagnetic tests for suggested configurations are however restricted due to very sparce and low quality paleomagnetic data, especially ...
Elming, Sten-Åke,, D'Agrella-Filho, M. S.,, Bispo-Santos, F.,   +2 more
core  

The Mesoproterozoic Guaporé suture in the SW Amazonian craton: Geotectonic implications based on field geology, zircon geochronology and Nd–Sr isotope geochemistry

, 2013
A major Mesoproterozoic paleo-plate boundary in the southwestern Amazonian Craton, the Guaporé Suture Zone, is investigated by U–Pb zircon geochronology, Sr–Nd isotope geochemistry and aeromagnetic data.
Tohver, E., McNaughton, Neal, Santos, J., Pimentel, M., Rizzotto, G., Hartmann, L.   +5 more
core   +1 more source