埃及西奈西南部古生代和中生代砂岩重矿物地层:再评价

Geoarabia Pub Date : 2011-07-01 DOI:10.2113/geoarabia160331

R. Knox, M. Soliman, M. Essa

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引用次数: 6

摘要

西奈西南部寒武系—早白垩世砂岩重矿物组合分析和定量方法的改进揭示了物源的连续变化，反映了阿拉伯盾的复兴和源区地形配置的变化。在寒武纪演替中发现了三个矿物单元，石炭纪至少有三个，白垩纪有三个。预计由这些连续的矿物学变化确定的成因单元将具有区域性，从而有助于阐明阿拉伯-努比亚盾的隆升历史，并为砂岩单元与邻近地区的对比提供更好的方法。寒武纪演替中磷灰石丰度的变化与物源特征无关，反映了干湿交替的气候条件。

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Heavy mineral stratigraphy of Palaeozoic and Mesozoic sandstones of southwestern Sinai, Egypt: A reassessment

Improved methods of analysis and quantification of heavy mineral assemblages in Cambrian to Early Cretaceous sandstones of southwest Sinai have revealed successive changes in provenance that reflect both rejuvenation of the Arabian Shield and changes in the topographic configuration of the source area. Three mineral units have been identified in the Cambrian succession, at least three in the Carboniferous and three in the Cretaceous. It is predicted that the genetic units defined by these successive changes in mineralogy will be of regional extent and thus assist in elucidating the history of uplift of the Arabian-Nubian Shield and provide a better means of correlating sandstone units into adjacent areas. Variation in the abundance of apatite in the Cambrian succession is independent of provenance signature and is interpreted as reflecting alternating dry and humid climatic conditions.

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来源期刊

Geoarabia 地学-地球科学综合

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Cessation. Published from 1996 to 2015, GeoArabia, The Journal of the Middle Eastern Geosciences was a quarterly journal covering the petroleum geosciences in the Middle East. The journal covers subjects such as: - sedimentology - tectonics - geophysics - petroleum reservoir characterization