SEDIMENTOLOGICAL AND HEAVY MINERALS STUDIES ON STREAM SEDIMENTS, EL-SHEIKH ABDELAL TOMB - EL-FAWAKHIR, CENTRAL EASTERN DESERT, EGYPT

Egyptian Journal of Geology Pub Date : 2018-01-01 DOI:10.21608/egjg.2018.216389

Elshahat

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Abstract

The wadi deposit samples collected along the Qift -El Quseir paved Road between El-Sheikh Abdelal tomb and El-Fawakhir gold mine are subjected to mineralogical and chemical analyses. The textural studies of the alluvial sediments clearly establish that these sediments are fine to very coarse-grained, poorly sorted, very fine-very coarse skewed, very platy to extremely leptokurtic deposited under moderate to low energy conditions. The heavy magnetic minerals are chiefly magnetite and goethite pseudomorph after pyrite while the nonmagnetic are the metallic mineral rutile, the non-metallic minerals are albite, apatite, sphene, cetrine, fluorite, sillimanite, tourmaline and garnet which, related to the metamorphic rocks exposed at Abu Fannani schist in Meatiq and Abu Zeran areas and mafic silicate minerals pyroxene, biotite, hornblende and epidote which, related to mafic-ultramafic rocks of El-Fawakhir ophiolite sequences. The light minerals are mainly quartz, muscovite and potash feldspars related to the alkali feldspar granites, syenogranites, monzogranite, granodiorites, tonalite, quartz diorite rocks and quartz plugs exposed at Abu Ziran, Um Selimate, Wadi Attala and Wadi El-Haramiya.

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埃及中东部沙漠el-sheikh abdelal墓- el-fawakhir河流沉积物沉积学和重矿物研究

沿着在El-Sheikh Abdelal墓和El-Fawakhir金矿之间的Qift -El Quseir铺设的道路收集的wadi矿床样本进行了矿物学和化学分析。冲积沉积物的结构研究清楚地表明，这些沉积物在中等到低能条件下，颗粒细到非常粗，分选差，非常细-非常粗歪斜，非常板状到非常细角状沉积。重磁性矿物主要为黄铁矿后的磁铁矿和针铁矿假形态，非磁性矿物为金属矿物金红石，非金属矿物为钠长石、磷灰石、榍石、铈、萤石、硅长石、电气石和石榴石，与Meatiq和Abu Zeran地区Abu Fannani片岩暴露的变质岩有关，基性硅酸盐矿物辉石、黑云母、角闪石和绿帘石，与El-Fawakhir蛇绿岩序列的基性-超基性岩石有关。轻矿物主要为石英、白云母和钾长石，与暴露于Abu Ziran、Um Selimate、Wadi Attala和Wadi El-Haramiya的碱长石花岗岩、正长花岗岩、二长花岗岩、花岗闪长岩、闪长岩、石英闪长岩和石英塞有关。

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Egyptian Journal of Geology

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