Thermal alteration of organic matter in the contact of a rift-related basaltic dyke: an example from the black limestone, Wadi Matulla, West central Sinai, Egypt

Abu Sharib, Ahmed S. A. A., Selim, Ali Q., Fattah, Mohamed M. Abdel, Hassan, Safiya M., and Sanislav, Ioan (2019) Thermal alteration of organic matter in the contact of a rift-related basaltic dyke: an example from the black limestone, Wadi Matulla, West central Sinai, Egypt. Minerals, 9 (5). 279.

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Abstract

In the Wadi Matulla area, central Sinai, Egypt, an asymmetric baked zone having an average width of 103 m was formed on both sides of a sub-aerial rift-related Oligocene basaltic dyke cross-cutting organic matter-bearing chalky limestone of the Upper Cretaceous Sudr Formation. Advection was the significant heat transfer mechanism. Very narrow metamorphic and metasomatic zones are developed in the country rock at the immediate contact with the dyke. The change in the thermal maturation of organic matter is reflected in the di�erences in values of the total organic carbon (TOC) within the baked zone. Such di�erences account for the color variation of the snow-white limestone from shades of brown, in the mature to barren samples, to black, in the totally carbonized overmature metamorphic ones. This study presents for the first time the thermal e�ect of mafic dykes on some exposed organic matter-bearing rocks in the Gulf of Suez (GOS) region, and turns attention to the local maturation of source rocks in contact with rift-related intrusives at a relatively greater burial depth in the rift basin.

Item ID: 58223
Item Type: Article (Research - C1)
ISSN: 2075-163X
Keywords: baked zone; organic matter; carbonization; maturation; source rock; thermal alteration; Wadi Matulla; Sinai; Egypt
Copyright Information: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY 4.0) license.
Date Deposited: 25 Sep 2019 05:19
FoR Codes: 04 EARTH SCIENCES > 0403 Geology > 040309 Petroleum and Coal Geology @ 30%
04 EARTH SCIENCES > 0403 Geology > 040304 Igneous and Metamorphic Petrology @ 30%
04 EARTH SCIENCES > 0403 Geology > 040311 Stratigraphy (incl Biostratigraphy and Sequence Stratigraphy) @ 40%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%
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