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Paleomagnetism of proterozoic geological units from the Amazonian Craton, and its participation in the Columbia, Rodinia, and Gondwana supercontinents

Abstract

The main purpose of this project is to elucidate the geodynamic evolution of the Amazonian Cráton and its interaction with other continental blocks during the Proterozoic, using key paleomagnetic poles, and monomineral Ar-Ar, U-Pb and Lu-Hf geochronology. Geodynamic models proposed for the cráton in global paleogeographic reconstructions (supercontinents) will be tested by the paleomagnetic data. Paleointensities will also be determined from the mafic rocks aiming at studying the geomagnetic field behavior during the Proterozoic. Anomalously low field intensity has been indicated for the Meso-Proterozoic times and this will thus be tested. The chosen targets for this study are unmetamorphosed intrusive and extrusive bodies of different ages, located at key áreas: felsic and associated mafic rocks from the Sobreiro Formation and Iriri: Group (1.88 Ga) and mafic to felsic rocks from the Jamon Suite (1.88 Ga), both situated in the Pará State; volcanic rocks (1.42 Ga) from the Figueira Branca Intrusive Suite and mafic dykes from the Tapirapé mafic Suite, both situated in the Mato Grosso State; and mafic volcanic rocks from the Alto Candeias Intrusive Suite (1.35 Ga), in the Rondônia State. Paleomagnetic analyses of other geological units that are already in progress will also be a part of this project: Surumu Group (1.98-1.96 Ga), Roraima Supergroup (1.87 Ga) and 1.78 Ga sills cutting these rocks from Roraima State, the Guadalupe Intrusive Suite and the Nova Guarita dyke swarm (1.42 Ga) from northern Mato Grosso State, and mafic dikes (Nova Lacerda region, 1.36-1.38 Ga) and sills (Rio Branco region, 0.98 Ga) cutting the Aguapei sedimentary rocks in the southwestem Mato Grosso State. Eventually, other units may be studied according to results. At least eight field trips are planned for sampling the different geological units, with the participation of expert geologists in the respective areas. (AU)

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Scientific publications (9)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DA SILVA, FERNANDO FERNANDES; DE OLIVEIRA, DAVIS CARVALHO; ANTONIO, PAUL Y. J.; D'AGRELLA FILHO, MANOEL S.; LAMARAO, CLAUDIO NERY. Bimodal magmatism of the Tucuma area, Carajas province: U-Pb geochronology, classification and processes. Journal of South American Earth Sciences, v. 72, p. 95-114, . (11/50887-6)
D'AGRELLA-FILHO, MANOEL S.; TRINDADE, RICARDO I. F.; QUEIROZ, MARCELO V. B.; MEIRA, VINICIUS T.; JANIKIAN, LILIANE; RUIZ, AMARILDO S.; BISPO-SANTOS, FRANKLIN. Reassessment of Aguapei (Salto do Ceu) paleomagnetic pole, Amazonian Craton and implications for Proterozoic supercontinents. Precambrian Research, v. 272, p. 1-17, . (12/50327-3, 11/50887-6)
BISPO-SANTOS, FRANKLIN; D'AGRELLA-FILHO, MANOEL S.; TRINDADE, RICARDO I. F.; JANIKIAN, LILIANE; REIS, NELSON J.. Was there SAMBA in Columbia? Paleomagnetic evidence from 1790 Ma Avanavero mafic sills (northern Amazonian Craton). Precambrian Research, v. 244, n. SI, p. 139-155, . (12/50327-3, 11/50887-6)
BISPO-SANTOS, FRANKLIN; D'AGRELLA-FILHO, MANOEL S.; TRINDADE, RICARDO I. F.; ELMING, STEN-AKE; JANIKIAN, LILIANE; VASCONCELOS, PAULO M.; PERILLO, BRUNO M.; PACCA, IGOR I. G.; DA SILVA, JESUE A.; BARROS, MARCIA A. S.. Tectonic implications of the 1419 Ma Nova Guarita mafic intrusives paleomagnetic pole (Amazonian Craton) on the longevity of Nuna. Precambrian Research, v. 196, p. 1-22, . (11/50887-6)
LIMA, GABRIELLE APARECIDA; BUENANO MACAMBIRA, MOACIR JOSE; AGUIAR SOUSA, MARIA ZELIA; RUIZ, AMARILDO SALINA; D'AGRELLA-FILHO, MANOEL SOUZA. Fissural mafic magmatism on southwestern Amazonian Craton: Petrogenesis and Ar-40-Ar-39 geochronology. Journal of South American Earth Sciences, v. 93, p. 214-231, . (11/50887-6)
ANTONIO, PAUL Y. J.; D'AGRELLA-FILHO, MANUEL S.; TRINDADE, RICARDO I. F.; NEDELEC, ANNE; DE OLIVEIRA, DAVIS C.; DA SILVA, FERNANDO F.; ROVERATO, MATTEO; LANA, CRISTIANO. Turmoil before the boring billion: Paleomagnetism of the 1880-1860 Ma Uatuma event in the Amazonian craton. GONDWANA RESEARCH, v. 49, p. 106-129, . (16/13689-5, 12/20335-4, 11/50887-6)
REIS, NELSON JOAQUIM; TEIXEIRA, WILSON; HAMILTON, MIKE A.; BISPO-SANTOS, FRANKLIN; ALMEIDA, MARCELO ESTEVES; D'AGRELLA-FILHO, MANOEL SOUZA. Avanavero mafic magmatism, a late Paleoproterozoic LIP in the Guiana Shield, Amazonian Craton: U-Pb ID-TIMS baddeleyite, geochemical and paleomagnetic evidence. LITHOS, v. 174, n. SI, p. 175-195, . (11/50887-6)
BISPO-SANTOS, FRANKLIN; D'AGRELLA-FILHO, MANOEL S.; JANIKIAN, LILIANE; REIS, NELSON J.; TRINDADE, RICARDO I. F.; REIS, MARIA ANNA A. A.. Towards Columbia: Paleomagnetism of 1980-1960 Ma Surumu volcanic rocks, Northern Amazonian Craton. Precambrian Research, v. 244, n. SI, p. 123-138, . (12/50327-3, 11/50887-6)
D'AGRELLA-FILHO, MANOEL S.; TRINDADE, RICARDO I. F.; ELMING, STEN-AKE; TEIXEIRA, WILSON; YOKOYAMA, ELDER; TOHVER, ERIC; GERALDES, MAURO C.; PACCA, IGOR I. G.; BARROS, MARCIA A. S.; RUIZ, AMARILDO S.. The 1420 Ma Indiavai Mafic Intrusion (SW Amazonian Craton): Paleomagnetic results and implications for the Columbia supercontinent. GONDWANA RESEARCH, v. 22, n. 3-4, p. 956-973, . (11/50887-6)

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