气候变化领域集成服务门户(CCPortal): Petrogenesis of the Low-TiO2 Batalha Suite in the eastern Parnaíba basin; northeastern Brazil

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DOI	10.1007/s00531-020-01829-5
	Petrogenesis of the Low-TiO2 Batalha Suite in the eastern Parnaíba basin; northeastern Brazil
	Miloski P.; de Castro Valente S.; Mendes J.C.; de Almeida C.N.; de Assis Negri F.; de Medeiros S.R.; Miranda A.W.; Corval A.; Borghi L.
发表日期	2020
ISSN	14373254
起始页码	785
结束页码	807
卷号	109 期号:3
英文摘要	In the Parnaíba basin, northeastern Brazil, some records of basic tholeiitic magmatism have been recognized as part of large igneous provinces (LIP’s). They are represented by the Mosquito basaltic flows (Triassic–Jurassic; ca. 200 Ma) that occurs in the west portion of the basin as well as the Sardinha diabases (Cretaceous; ca. 124 Ma) eastwards. The Mosquito and Sardinha magmatic rocks of the Parnaíba basin were related to the processes of distension and rupture of Pangea and Gondwana, respectively. This paper presents the petrogenesis of diabase sills that occur in the eastern portion of the basin, probably associated with the Sardinha formation. The studied rocks are mostly equigranular, medium-grained diabases. They are tholeiitic andesite-basalts and stricto sensu basalts, comprising a single Low-TiO2 (TiO2 < 2 wt%) magmatic suite here denominated as Batalha Suite. They show relative enrichment in the broad spectrum of LILE (large ion lithophile elements), HFSE (high field strength elements) and REE (rare earth elements) when compared to MORB, chondrite and primitive mantle, similar to continental flood basalts (CFB) elsewhere. This suite evolved by fractional crystallization as attested by whole-rock geochemistry, mineral chemistry, geochemical modeling and Sr–Nd isotope data. The studied Low-TiO2 basalts derived from an enriched mantle source likely to be represented by the subcontinental lithospheric mantle (SCLM). The diabases are related with 16% of partial melting of either a less enriched residual garnet harzburgitic source or a more enriched residual spinel-harzburgite. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Cfb’s; Lip’s; Low-TiO2 basalts; Parnaíba basin; Sardinha formation
语种	英语
scopus关键词	diabase; flood basalt; fractional crystallization; large igneous province; magmatism; mantle source; partial melting; petrogenesis; tholeiite; titanium; Parana Basin
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147703
作者单位	Departamento de Geologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro, Cidade Universitária, Rio de Janeiro, 21941-916, Brazil; Departamento de Petrologia e Geotectônica, Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, 23890-000, Brazil; Instituto Geológico-Secretaria do Meio Ambiente do Estado de São Paulo, Vila Mariana, São Paulo, 04015-011, Brazil
推荐引用方式 GB/T 7714	Miloski P.,de Castro Valente S.,Mendes J.C.,et al. Petrogenesis of the Low-TiO2 Batalha Suite in the eastern Parnaíba basin; northeastern Brazil[J],2020,109(3).
APA	Miloski P..,de Castro Valente S..,Mendes J.C..,de Almeida C.N..,de Assis Negri F..,...&Borghi L..(2020).Petrogenesis of the Low-TiO2 Batalha Suite in the eastern Parnaíba basin; northeastern Brazil.International Journal of Earth Sciences,109(3).
MLA	Miloski P.,et al."Petrogenesis of the Low-TiO2 Batalha Suite in the eastern Parnaíba basin; northeastern Brazil".International Journal of Earth Sciences 109.3(2020).