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Structural and Tectonic Development of Nahr Umr Field, Southern Iraq | ||
| basrah journal of science | ||
| Article 1, Volume 25, Issue 1, 2007, Pages 85-95 PDF (0 K) | ||
| Abstract | ||
| Nahr Umr is one of the important oil fields in southern Iraq. It is oval anticline structure formed by rising of Infra-Cambrian salt that happened by two mechanisms: First, density inversion mechanism represent the difference between density of salt rocks and others surrounding sedimentary rocks. Second, differential loading mechanism represent the difference in distribution of lithostatic pressure above anticline salt structures. These mechanisms worked together with basement uplift from Early Cretaceous to Late Tertiary to form a non-piercement salt structure that called salt pillow structure at first stage. It called salt pillow and had oval shape in top view. The salt pillow developed to form a piercement salt structure at second stage, and it pierced apart of the Paleozoic overburden successions. The effects of piercement salt structures reached to the Mesozoic and some of Cenozoic overburden successions to form Nahr Umr oil field at last. | ||
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