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Petrogenesis of sedimentary ironstones in Jabal Sanam structure, Southern Iraq. | ||
| Mesopotamian Journal of Marine Science | ||
| Article 1, Volume 22, Issue 1, 2007, Pages 93-105 PDF (0 K) | ||
| Authors | ||
| Z.A. Abdul Naby; A.A. Al-Fregi; B.H. Soltan | ||
| Abstract | ||
| A total of (16) ironstone samples were collected from surface exposures of Jabal Sanam. These samples were firstly described in the field, and then ten thin sections prepared for microscopic study. X-ray, U.V. visible and atomic absorption was employed .The available ironstones show a wide spread distribution over Jabal Sanam structure mainly in the eastern and southeastern parts. Their variety colors; brown to reddish brown, yellow to reddish yellow, depending upon the Fe+³ Oxides State the content characterize them. The ironstones under study have high percent of Fe+³ about 52%, the obtained X-ray and ultraviolet diffraction patterns and atomic absorption revealed the dominancy of Hematite mineral. It’s believed that these ironstones originated by the decomposition of Precambrian basement: basic, ultra basic igneous and metamorphic rocks by the action of hydrothermal solutions that accompanied the peircement of Jabal Sanam. | ||
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