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Geochemistry and Petrography of Clastic Deposits from the Late Paleozoic Shihezi Formation in Eastern Ordos Basin, China: Implications for Provenance and Tectonic Setting
Author(s) -
MA Yanping,
ZHAO Jinzhou
Publication year - 2015
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12304_21
Subject(s) - provenance , geology , paleozoic , clastic rock , petrography , geochemistry , tectonics , structural basin , china , petrology , paleontology , sedimentary rock , archaeology , history
Provenance studies are central to the reconstruction of paleo-drainage systems, which in turn may lead to an improved understanding of potential reservoir distribution (Preston J et al., 2002). Ordos basin developed tight gas sandstone reservoir in the Upper Paleozoic. The sandstone reservoirs show different terrigenous clastic components, which in turn may influence the diagensis and reservoir physical property. The mineralogy and petrology of sandstones is ultimately controlled by the make-up of the source area. Clasitc compositions must be taken into account when attempting to understanding of potential reservoir distribution. Reconstruct the provenance and paleodrainage patterns of ancient continental sedimentary successions plays a positive role in further prospecting and research the tight gas sandstone. Several trace elements, such as La, Ce, Nd, Gd, Yb, Y, Th, Zr, Hf, Nb and Sc are most suited for discriminations of provenance and tectonic setting because of their relatively low mobility during sedimentary processes and their short residence times in seawater (Holland 1978; Taylor and McLennan 1985). These trace elements with major elements are used to discriminate tectonic environments and source-rock compositions (Bhatia, et al., 1986; 1985; Gu, et al., 2002). Petrographic, major, trace, and rare earth element compositions of sandstones from the Late Paleozoic Shihezi Formation in the East of Ordos basin, China, have been investigated to determine their provenance and tectonic setting.