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language
jpn
Author
Hossain, H.M.Zakir
Barry, Roser
Description
Whole-rock major and trace element X-ray fluorescence analyses are reported for 238 samples (115 sandstones, 123 mudrocks) from the Jaintia, Barail, Surma, Tipam, and Dupitila Groups of the Sylhet basin, Bangladesh, as part of a study of their provenance. The units examined range from Late Eocene to Plio-Pleistocene in age. The samples analyzed were taken from core material from four hydrocarbon exploration wells, and also from surface outcrop. Loss on ignition contents are generally low (< 6%), although occasional higher values occur. SiO_2 contents of the sandstones are usually greater than in the mudrocks, but formation averages of both lithotypes exceed that of average upper continental crust (UCC). Average abundances of Pb, Zr, Th, Ce and most ferromagnesian elements (Sc, Fe_2O_3, TiO_2, Ni, Cr, V) are also usually greater than in UCC. In contrast, average contents of CaO, Na_2O, and Sr are strongly depleted relative to UCC ; Nb, K_2O, Rb, MgO, Al_2O_3, and Ba show lesser and more variable depletion.
Journal Title
島根大学地球資源環境学研究報告
Volume
25
Start Page
49
End Page
59
ISSN
13439774
Published Date
2006-12-27
NCID
AA11455176
Publisher
島根大学総合理工学部地球資源環境学教室
Publisher Aalternative
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
Gyoseki ID
e14184
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Remark
12-14,16+ / 1993+
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