Paleogeographic framework and provenance features during Late Triassic Chang 9 time of the Yanchang Formation, Ordos Basin, China

Ding, Xiaobin; Tian, Jie; Chen, Jingshan; Yao, Jiayi; Deng, Xiuqin; Li, Yuanhao

doi:10.1007/s12517-014-1749-4

Cited by 10 publications

(1 citation statement)

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“…Therefore, the relationship between the source of the sediments and the depositional basin is controlled by tectonic processes (Blatt et al 1980;Corcoran et al 1999;Jin et al 2006;Nalpas et al 2008;Zaid 2012). Geochemical analyses of siliciclastic rocks are widely used to interpret the composition of source rocks (Armstrong-Altrin et al 2004;Umazano et al 2009;Etemad-Saeed et al 2011;Almasoud et al 2015;Ding et al 2015;Zaid 2015;Varga et al 2017), and to identify the tectonic settings during deposition Armstrong-Altrin 2013, 2016;Khan and Khan 2015;Etemad-Saeed et al 2015). Another usage of geochemical studies for reconstructing source areas is to reconstruct the palaeogeographical history (Hossain et al 2010;Kermani et al 2016;Rashid and Ganai 2015;Ma et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Provenance of Jurassic siliciclastic deposits, determined by geochemistry and petrology: a case study from a Cimmerian intramontane basin, the Binalud Mountains, Iran

Poursoltani

Fürsich

2020

Arab J Geosci

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The Jurassic Bazeh-Howz Formation is a succession of braided river siliciclastics deposited in an intramontane basin. Three major types of facies, conglomerate, sandstone and shale, have been identified. Conglomerates are mainly monomict and polymict orthoconglomerates. The sandstones are quartzarenites, sublitharenites, feldspathic litharenites and phyllarenites. Fine-grained deposits represent more than 65% of the strata, and commonly alternate rhythmically with siltstone and very fine-grained sandstone. Bulk rock geochemistry suggests felsic, mafic and ophiolite rocks as well as Proterozoic recycled sandstones as the source of the Bazeh-Howz sediments. According to petrographic data, the main tectonic origins of the studied sediments are a recycled orogen, passive margin, magmatic arc basin, rifted continental margin and even a subduction zone. Trace element ratios such as Th-Sc-Zr/10 indicate that the sediments of the Bazeh-Howz Formation are mainly derived from a continental island arc. Also, the LaTh -Sc trace element ratio indicates a continental island-arc origin of the sandstones and shales. The rocks formed in the context of the Early Cimmerian collision in northeastern Iran became part of the rising Cimmerian mountain belt.

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