Geological quarterely, ( ISI ), Volume (63), No (3), Year (2019-10) , Pages (603-618)

Title : ( Geochemistry of shales of the Qadir Member (Nayband Formation; Upper Triassic), East Central Iran (Tabas Block): Implications for provenance and paleogeography )

Authors: Ehsan Zamaniyan , Mohammad Khanehbad , Sayyed Reza Moussavi Harami , Asadollah Mahboubi ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

Abstract

The Upper Triassic shale of the Qadir Member of the Nayband Formation, East Central Iran has been analyzed geochemically to evaluate provenance and paleogeography. The Qadir Member in the Parvadeh Coal Mine section is 450 meters thick, and includes sandstone, shale, coal, siltstone, and fossiliferous limestone. XRD analysis of shale samples from the Qadir Member largely indicated the presence of illite and chlorite, with small amounts of kaolinite and montmorillonite. On binary and triangular diagrams the data suggests an intermediate igneous source rock for these shales. Plotting the geochemical data on binary diagrams also indicates the tectonic setting of an active continental margin, perhaps reflecting the Early Cimmerian tectonic event with Neothetys subduction under the Iran plate, and collision of the Iran plate with Turan during the Late Triassic. The Chemical Index of Alteration (CIA) and Plagioclase Index of Alteration (PIA) values for shale from the Qadir Member of Nayband Formation vary from 74.04 to 80.54 (average 78.02) and 84.31 to 91.85 (average 87.81), respectively, indicating moderate to high chemical alteration in the source area and suggesting a semi-humid climate during deposition. The geochemical data and palaeogeographical models indicate that the Qadir Member shale was deposited on an active margin in a shoreline to transitional-marine setting.

Keywords

, Triassic, Nayband Formation, Tabas, provenance, geochemistry
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@article{paperid:1076243,
author = {Zamaniyan, Ehsan and Khanehbad, Mohammad and Moussavi Harami, Sayyed Reza and Mahboubi, Asadollah},
title = {Geochemistry of shales of the Qadir Member (Nayband Formation; Upper Triassic), East Central Iran (Tabas Block): Implications for provenance and paleogeography},
journal = {Geological quarterely},
year = {2019},
volume = {63},
number = {3},
month = {October},
issn = {1641-7291},
pages = {603--618},
numpages = {15},
keywords = {Triassic; Nayband Formation; Tabas; provenance; geochemistry},
}

[Download]

%0 Journal Article
%T Geochemistry of shales of the Qadir Member (Nayband Formation; Upper Triassic), East Central Iran (Tabas Block): Implications for provenance and paleogeography
%A Zamaniyan, Ehsan
%A Khanehbad, Mohammad
%A Moussavi Harami, Sayyed Reza
%A Mahboubi, Asadollah
%J Geological quarterely
%@ 1641-7291
%D 2019

[Download]