Results 21 to 30 of about 200 (171)

Mineral chemistry of paleoproterozoic volcano-plutonism from the São Félix do Xingu (PA) region, Amazonian Craton [PDF]

Geologia USP. Série Científica, 2014
The Sobreiro and Santa Rosa formations are result of large paleoproterozoic volcanic activities in the São Félix do Xingu (PA) region, SE of Amazonian Craton.
Raquel Souza da Cruz, Carlos Marcello Dias Fernandes, Caetano Juliani, Bruno Lagler, Carlos Mário Echeverri Misas, Tatiane de Souza Nascimento, Aguinaldo José Corrêa de Jesus   +6 more
doaj   +1 more source

Rb-Sr Geochronology and Geochemical Characteristics of Mafic Dikes in the Nova Lacerda and Conquista D´Oeste Region, Mato Grosso, SW Amazonian Craton [PDF]

Geologia USP. Série Científica, 2009
In the Nova Lacerda and Conquista D’Oeste regions, Mato Grosso State, SW part of the Amazonian Craton, mafi c dikestrending NNW intrude the Nova Lacerda Granite (1462 ± 12 Ma), within the Jauru Domain, in the Rondonia-San IgnacioProvince (1.55 - 1.3 Ga).
Amarildo Salina Ruiz, Vicente Antonio Vitório Girardi, João Batista de Matos, Paulo César Corrêa da Costa   +3 more
doaj  

The tectonic framework of the Alto Guaporé Belt, Amazonian Craton, Brazil, revealed by the integration of airborne geophysics, and geological and geochronological data

Journal of the Geological Survey of Brazil, 2022
The Alto Guaporé Belt represents a key component in the investigation of the geological history and reconstruction of the SW Amazonian Craton.  Airborne geophysical, isotopic and geochronological data integrated with field data have provided new insight
Carlos Eduardo Santos de Oliveira, Adalene Silva, Jaime Scandolara   +2 more
doaj  

U-Pb SHRIMP dating of basement rocks of the Iriri-Xingu domain, Central Amazonian province, Amazonian craton, Brazil

Brazilian Journal of Geology, 2019
The Iriri-Xingu domain, located in the central part of the Amazonian craton, consists of extensive occurrences of Paleoproterozoic volcanic rocks and granites with published ages of ca.
Marcelo Lacerda Vasquez, Umberto Giuseppe Cordani, Kei Sato, Jaime dos Passos de Oliveira Barbosa, Maria Telma Lins Faraco, Victor Câmara Maurer   +5 more
doaj   +1 more source

Continental contribution to the marinoan cap carbonate of Tangará da Serra – MT, Brazil: further evidence from Sr-Nd-Pb isotope geochemistry

Brazilian Journal of Geology
On the southern edge of the Amazonian Craton, the Mirassol d’Oeste and Guia formations constitute the cap carbonate of the Araras Group. Petrography, X-ray diffraction, and quantification of terrigenous material allowed the identification of detrital ...
Nayra Michelly das Chagas Souza, Jean Michel Lafon, João Marinho Milhomem Neto, Joelson Lima Soares   +3 more
doaj   +1 more source

Petrography, geochemistry and zircon U-Pb geochronology of the Siderian-Rhyacian granitoids of NW Bacajá domain, Amazonian Craton, Brazil

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, Wagner Silva Amaral, Felipe Holanda dos Santos   +2 more
doaj  

Ediacaran Thermal Disturbance in the NW Amazonian Craton: Insights from Zircon and Apatite U–Pb Geochronology of the Guaviare Complex, Colombia

Geosciences
The northwestern Amazonian Craton exposed in eastern Colombia preserves a complex Proterozoic tectonothermal history. In this study, we present new zircon and apatite U–Pb geochronological data from orthogneisses of the Guaviare Complex (Termales Gneiss ...
Amed Bonilla Pérez, Nathan Cogné, Carlos Alfonso Zafra Mejía   +2 more
doaj   +1 more source

Contribution to the understanding of the Rondonia Tin Province granites (SW Amazonian Craton) origin using U-Pb and Lu-Hf in zircon by LA-ICP-MS: implications to A-type granite genesis

Journal of the Geological Survey of Brazil, 2019
The study of granite rocks is important in order to understand chemical evolution of the continental crust. Their isotopic composition provides information on their magmatic sources, whether being mantle, crust or a mixture of both.
Beatriz Pereira Debowski, Marcio Inacio Alves, Anderson Costa Santos, Armando Dias Tavares Jr., Mauro Cesar Geraldes   +4 more
doaj   +1 more source

Groundwater Connectivity and Buffering in Western Australian Hypersaline Lakes: Implications for Late‐Stage Martian Lacustrine Systems

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Thousands of saline to hypersaline lakes exist across the Yilgarn Craton in Western Australia, representing potential Mars analogs with diverse and varying salinity, pH, and oxygen conditions that remain poorly constrained. Here, we report geochemical trends in lake waters that vary across wet‐dry cycles as well as with regional location and ...
T. A. Plattner, B. E. Schmidt, N. M. Fernandez, P. T. Doran, M. A. Birmingham, J. M. Weber, A. Celestian, E. D. Ingall, J. S. Bowman, S. M. Som, A. Odenheimer, T. Bornholdt, C. Sephus, H. T. Jamison, K. Russo, S. Buessecker, L. A. Fisher, B. Klempay, E. R. Paris, E. J. Skoog, M. M. Weng, C. Pozarycki, A. T. Schartup, C. E. Carr, J. J. Wray, F. Rivera‐Hernández, E. Quartini   +26 more
wiley   +1 more source

The Encantada Granite: registration of a peraluminous intrusion in the Rondonian Province - San Ignacio, in SW Amazonic Craton, Mato Grosso, Brazil [PDF]

Geologia USP. Série Científica, 2015
The Encantada Granite occurs on the extreme southwest of the state of Mato Grosso, SW of the Amazonian Craton, near the border of Brasil/Bolívia. It corresponds to an body oriented to NNW direction that intruded metasedimentary and metavolcanic rocks ...
Brena Verginassi do Nascimento, Carlos Humberto da Silva, Ana Cláudia Dantas da Costa   +2 more
doaj   +1 more source