Sedimentary provenance of the Marília Formation (Bauru Basin), Southeast Brazil

Abstract

The Marília Formation is a lithostratigraphic unit positioned at the top of the Bauru Group of Maastrichtian age. The present work presents a provenance study of the Marília Formation sandstones through the combined dating of the fission‐track method (FTM) and U–Pb, in which individual zircon grains are simultaneously dated by these two methods. Thirty‐one zircons were dated in the C5 sample and 26 in the C7 sample for a total of 57 grains. The data demonstrated a wide range of U–Pb ages, presenting maximum and minimum ages, respectively: 2,905 ± 11 and 128 ± 1 Ma for the C7 sample and 2,676 ± 10 and 455 ± 5 Ma for the C5 sample. Regarding the fission‐track (FT) ages, they have been grouped into three time intervals, which are associated to geological events relatively well recognized in the published literature: ages younger than 250 Ma (Wealdenian Reactivation); between 250 and 470 Ma (Palaeozoic orogenesis—Ocloyic, Precordilleran, Chanic, and Sanrafaelic); and older than 470 (Precambrian collisions—Brasiliano I, II, and III). There is a predominance of results of Precambrian age using the U–Pb dating, mainly in the Neopalaeoproterozoic, and with FT dating corresponding to the Ocloyic, Precordilleran, Chanic, and Sanrafaelic orogeneses. From the comparison of the results between the two dating methods, the age variations suggest that the zircons originated during the main south‐western orogenesis of Gondwana and were reworked during the Palaeozoic and Mesozoic geological episodes. The ages associated to the Upper Cretaceous are related to the tectonic and magmatic activity of the Alto Paranaiba Uplift.

Supersequência Bauru (Cretáceo da Bacia do Paraná): Revisão estratigráfica com base em dados paleontológicos recentes

“…Como já mencionado, praticamente todos os autores que mencionaram as unidades Marília e Serra da Galga admitiram que estas unidades sejam coevas (e.g., FÚLFARO & BARCELOS 1991;FERNANDES & COIMBRA 2000;BATEZELLI et al 2005BATEZELLI et al , 2007BATEZELLI et al , 2019SILVA et al 2015SILVA et al , 2017SILVA et al , 2018SILVA et al , 2022BASILICI et al 2016;BATEZELLI 2017;SAMPAIO et al 2017;DAL'BÓ et al 2019;NEVES & BATEZELLI 2019;SANTOS et al 2020;RIBEIRO 2000;SOARES et al 2020;DIAS et al 2021). E.A.…”

Provenance and weathering index of the Upper Cretaceous São Carlos Formation and its tectonic significance in the eastern Bauru Basin, SE Brazil

“…Considering an Upper Santonian depositional age for the São Carlos Formation (Arai and Dias-Brito, 2018), a potential source area for these deposits is the Coniacian-Maastrichtian uplifting in the Serra do Mar region (Zalán and Oliveira, 2005), whereas the Cenomanian to Campanian Alto Paranaíba Uplift has been inferred as a probable source for the Araçatuba Formation (Hasui and Haralyi, 1991;Batezelli, 2017;Marques dos Santos et al, 2019).…”

CO2 mineralization process in basalt rocks: study case, Serra Geral Formation, Paraná sedimentary Basin, São Paulo state

“…The Serra Geral Group is directly covered by other units, including the Marília and Vale do Rio do Peixe Formations of the Bauru Group (De Paula E Silva et al, 2009), the Itaqueri Formation in the Brotas region, and alluvial and colluvio-alluvial deposits in the Itirapina area (Riccomini, 1997). The Marília Formation includes fine to medium-grained sandstones, mudstones, conglomerates, and conglomeratic sandstones (Marques Dos Santos et al, 2020). The Vale do Rio do Peixe Formation consists of fine to very fine-grained sandstones with some siltstones or sandy mudstones (Fernandes et al, 2003).…”