Correlations among large igneous provinces related to the West Gondwana breakup:A geochemical database reappraisal of Early Cretaceous plumbing systems
作者机构：Instituto de GeociênciasUniversidade de São Paulo05508-080São PauloBrazil W.H.Bryan Mining&Geology Research CentreSustainable Minerals InstituteThe University of QueenslandSt Lucia CampusQLD 4072Australia Programa de Pós-Graduação em Geodinamica e GeofisicaUniversidade Federal do Rio Grande do NorteCampus Universitário S/NLagoa Nova59078-970 NatalRNBrazil
出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)
年 卷 期：2023年第14卷第1期
页 面：181-206页
核心收录：
学科分类：070904[理学-构造地质学] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学]
基 金：the Brailian agencies FAPESP(2017/13130-0) CAPES(1643026)for the PhD scholarships at the USP the Research Internships Abroad Program(BEPE/FAPESP)for the scholarship at the UQ(2018/24769-5) the CNPq for the research fellowship(303201/2019-3) PhD scholarship(141413/2018-2) MSc scholarship(132996/2019-7)at USP,respectively the sandwich PhD scholarship at the UQ(88881.188664/2018-01)
主 题：LIP-related plumbing systems Continental tholeiites Paraná-Etendeka EQUAMP Self-organizing maps
摘 要：The opening and spreading of the Atlantic Ocean between Africa and South America evolved during the Early Cretaceous and were preceded by dramatic tholeiitic(mafic)magmatism and minor silicic and alkaline *** features are presently recognized from the equatorial regions of Brazil and Africa to the Falklands and South *** southeastern South America,continental flood basalts and related plumbing systems constitute the ParanáMagmatic Province(PMP),whose African counterpart is the Etendeka Magmatic Province(EMP).In northeastern Brazil,dike swarms and sill complexes compose the Equatorial Atlantic Magmatic Province(EQUAMP).As a common feature,these provinces are chemically represented by two prevalent magma types:(1)tholeiitic basalts and basaltic andesites with lowTi(TiO_(2)~2 wt.%)and incompatible element *** Ti tholeiites are relevant in the northern PMP and EMP,and dominant in *** rocks(SiO_(2)=57-65 wt.%)interpreted as byproducts of assimilation and/or fractional crystallization(AFC)processes from high Ti tholeiitic magmas,are scarce(but present)in all three *** accurate analysis of multivariable databases collected from the literature for dikes and sills,including major and trace element and radiogenic isotope data,reveals close similarities in their geochemical *** a paleogeographic reconstruction of West Gondwana,the intrusive remnants of the PMP,EMP and EQUAMP are spread over an area of nearly 10×10^(6)km^(2).forming perhaps the most extensive set of plumbing systems on Earth,with a relatively consistent chronology based on a vast collection of K-Ar and^(40)Ar/^(39)Ar data available in the *** work provides the first c
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