The long life of SAMBA connection in Columbia: A paleomagnetic study of the 1535 Ma Mucajaí Complex, northern Amazonian Craton, Brazil

Abstract

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From microanalysis to supercontinents: Insights from the Rio Apa Terrane into the Mesoproterozoic SW Amazonian Craton evolution during Rodinia assembly

“…Similar to the Palaeoproterozoic to Mesoproterozoic events in the RAT, SE Laurentia is characterized by long‐lived subduction and protracted convergence prior to collision (Hynes & Rivers, 2010) with Mesoproterozoic events being characterized by continent–arc–continent collision and exhumation of high‐pressure rocks (Carlson et al, 2007; Hynes & Rivers, 2010; Mosher et al, 2008). The similar tectono‐magmatic history and the palaeogeographic reconstruction suggest a possible connection between SW Amazonian–SE Laurentia (Bispo‐Santos et al, 2020; Evans, 2013; Johansson, 2009). Thus, the accretionary‐to‐collisional event recorded in the RAT (1,420–1,200 Ma) can be related to the Elsonian accretionary event in SE Laurentia, potentially recording the closure of the Mirovoi Ocean between SE Laurentia and SW Amazonia through two‐sided subduction and suggesting a linked kinematic evolution of these cratonic masses at this time (Bettencourt et al, 2010; Cawood & Pisarevsky, 2017; Gower & Krogh, 2002; Hynes & Rivers, 2010; Rivers & Corrigan, 2000; Rizzotto et al, 2013; Sadowski & Bettencourt, 1996; Spencer et al, 2013).…”

Paleomagnetism of the Main South American Precambrian Cratons

“…Comparison of these poles with an APW path traced for Baltica (Salminen et al, 2017) between 1.8 and 1.4 Ga (Figure 7a, also including Laurentian poles) suggest either, that Amazonia broke-up from Columbia at ca. 1.42 Ga, or a clockwise rotation of Amazonia-West Africa occurred at some time between 1.53 and 1.44 Ga ago (e.g., Bispo-Santos et al, 2020;D'Agrella-Filho et al, 2021). In this case, the best Amazonia-Baltica configuration at 1.44-1.42 Ga is that proposed by Pehrsson et al (2016) (Figure 7b).…”

Geodiversity in the Amazon drainage basin

“…Good examples of this early history are the Trincheira Complex, which is associated with the supercontinent Columbia [ 55 ], the Nova Brasilândia-Aguapeí Belt, which is related to the amalgamation of Rodinia [ 57 ], the Gurupi [ 49 ] and Araguia Belt [ 56 ], which are both related to the amalgamation of Gondwana, and the Anarí Formation, a remnant of the magmatic activity preceding the break-up of Pangea [ 54 ]. Other areas, such as the Colider Suite [ 58 ] and Mucajai Anorthosite-Monzonite-Granite Complex [ 59 ], are suitable for palaeomagnetic studies, allowing the reconstruction of the orientation of palaeocontinents. Sedimentary records can also provide information about palaeogeological events, such as sediments found in quarries and outcrops in Rondônia and Mato Grosso, Brazil presenting evidence for the Snowball Earth hypothesis [ 61 ].…”