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Spectral analyses, geology and petrology of the Gulf of Suez rift-related Oligo-Miocene basalts at Abu Zenima area, west central Sinai, Egypt
The Egyptian Journal of Remote Sensing and Space Sciences ( IF 6.393 ) Pub Date : 2022-01-11 , DOI: 10.1016/j.ejrs.2022.01.002
Mohamed W. Ali-Bik 1 , Safwat S. Gabr 2
Affiliation  

The initial phase of the Gulf of Suez rifting in the late Oligocene was accompanied by the eruption of continental basaltic magmas, which continued to the early Miocene. Within the rift zone at Abu Zenima area, west-central Sinai, several km-scale Oligo-Miocene basaltic exposures in the form of dykes, sills and lava flows intruded/extruded the Phanerozoic sedimentary successions. These basaltic outcrops were successfully discriminated from their country rocks by remote sensing techniques, using the Landsat-8 dataset. The basalts are evolved tholeiitic, Ti-rich varieties and exhibit narrow compositional range with absence of any felsic counterparts, suggesting equilibrium crystallization process in their evolutions rather than fractional crystallization mechanism. Simulations of equilibrium crystallization process and evolution trajectories of these basalts have been modeled.



中文翻译:

埃及西奈中西部阿布泽尼马地区苏伊士湾裂谷相关的少新世玄武岩的光谱分析、地质学和岩石学

渐新世晚期苏伊士湾裂陷初期伴随大陆玄武质岩浆喷发,并持续到中新世早期。在西奈中西部阿布泽尼玛地区的裂谷带内,数公里尺度的渐近-中新世玄武岩出露以岩脉、岩床和熔岩流的形式侵入/挤压显生宙沉积层序。使用 Landsat-8 数据集,通过遥感技术成功地将这些玄武岩露头与它们的围岩区分开来。玄武岩是演化的拉斑玄武岩、富含钛的品种,其成分范围狭窄,没有任何长英质对应物,表明它们的演化过程中存在平衡结晶过程,而不是分级结晶机制。

更新日期:2022-01-11
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