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埃及西奈阿布泽尼玛地区铀矿成矿地质特征及控制因素分析
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作者 张运涛 裴荣富 +4 位作者 张小平 曾文乐 王浩琳 黄符桢 邵长亮 《东华理工大学学报(自然科学版)》 CAS 2010年第4期339-344,共6页
埃及西奈半岛盛产铁锰矿、铜矿、铀矿、高岭石、石英砂等矿产,铀与铜、铁锰矿有一定的空间联系。笔者通过在阿布泽尼玛成矿区多年的工作实践和研究,对该区铀成矿地质特征进行了分析,圈定了7个铀矿赋矿层位,总结了该区铀矿化分布规律,获... 埃及西奈半岛盛产铁锰矿、铜矿、铀矿、高岭石、石英砂等矿产,铀与铜、铁锰矿有一定的空间联系。笔者通过在阿布泽尼玛成矿区多年的工作实践和研究,对该区铀成矿地质特征进行了分析,圈定了7个铀矿赋矿层位,总结了该区铀矿化分布规律,获得了同生沉积、后生叠加改造的成因认识。 展开更多
关键词 阿布泽尼玛地区 铀矿化 分布规律 赋矿层位
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Geological Controls and Prospectivity Mapping for Manganese Ore Deposits Using Predictive Modeling Comparison:An Integration of Outcrop and Remote Sensing Data,Sinai Microplate,Egypt
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作者 Sara Zamzam 《Journal of Earth Science》 SCIE CAS CSCD 2023年第2期588-608,共21页
One of the most controversial minerals in their origin and occurrence around the world is manganese deposits.The Abu Zenima area is rated one of the most economically important places where manganese ore deposits(Mn O... One of the most controversial minerals in their origin and occurrence around the world is manganese deposits.The Abu Zenima area is rated one of the most economically important places where manganese ore deposits(Mn ODs)are located in the southwest Sinai microplate,Egypt.These deposits are confined with the Um Bogma Formation(UBF)and the reserves of this region are relatively small.In this study,optical and radar data are used in a new challenge as an attempt to reach the closest controls and setting of Mn ODs.Moreover,Frequency Ratio(FR)and Logistic Regression(LogR)predictive models are applied to integrate different geospatial thematic maps,to predict new potential resource zones for increasing the ranges of mining quarries.Landsat8 OLI,Sentinel-2A Multi Spectral Instrument and Radar(Sentinel-1B)data are combined for mapping Mn ODs locations and their relationship with geological structures and the surrounding rocks.Band ratio,Principal and Independent Component Analysis techniques and four classification algorithms were implemented to the optical’VNIR and SWIR bands.Unusually,the interferometric processing steps for Sentinel-1 data were made for understanding the tectonic features in the area.The FR and LogR models are validated during fieldwork with known Mn ODs locations.Results indicate that processed images are capable of differentiation of UBF which broadly distributed in the central and southern parts of the area.Mn ODs possibly formed by thermal events that attributed to paleo-volcanic events before the rift stage.The high accuracy of LogR model(0.902)suggests that high Mn ODs potential zones are identified within the intersected fault zones near granitic units.This integration is recommended for discriminating hydrothermally Mn ODs in other arid geographic regions. 展开更多
关键词 manganese deposits Abu zenima Landsat8 oli sentinel data fault zones predictive modeling remote sensing
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