Arid
DOI10.1007/s12517-013-0874-9
Exploration of new gold occurrences in the alteration zones at the Barramiya District, Central Eastern Desert of Egypt using ASTER data and geological studies
Salem, S. M.1; Soliman, N. M.1; Ramadan, T. M.1; Greiling, R. O.2
通讯作者Salem, S. M.
来源期刊ARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
EISSN1866-7538
出版年2014
卷号7期号:5页码:1717-1731
英文摘要

The use of ASTER data and fieldwork supported by mineralogical and geochemical analyses enabled exploration of new gold occurrences in the alteration zones in the ultramafic-mafic successions at the Barramiya district. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) band ratios (4/8, 4/2 and 8/9 in R, G and B channels, respectively) helped in recognising of two listwaenite alteration zones (areas 1 and 2) promising for gold in the north-east and south-east of the Barramiya gold mine. Mineralogical studies and X-ray diffraction analysis revealed that areas 1 and 2 are characterized by variable concentrations of talc, ankerite, magnesite, quartz and calcite. Ore microscope studies revealed the sulphide minerals carry gold within these alteration zones; moreover, goethite and malachite are also observed. Fire assay results show Au contents in the range of 5.04 ppm in the graphite schist, 4.02 ppm in the quartz veins and 3.76 ppm in the listwaenite alteration. The atomic absorption analysis (AAS) of samples from area 1 yields an average Au content in the quartz-veins of 2.4 ppm, Ag content is 8.0 ppm and Cu content is 2.4 wt%. The listwaenite alteration gives an average Au content of 4.4 ppm and a Cu content of 2.8 wt%. In area 2, the AAS of the quartz-veins revealed an average Au content of 2.6 ppm, 6.2 ppm Ag and 1.9 wt% Cu. The listwaenite alterations of area 2 grade 3.5 ppm Au and 2.4 wt% of Cu. The Barramiya District is made up of ophiolitic ultramafic belts of serpentinites, talc carbonates and talc graphite schists, mainly thrust over the metavolcanic sequences. They include highly strained and tectonised parts enriched in sulphides, iron oxides and carbonates, with developed listwaenite alterations along the thrust contacts. Gabbro and granitic intrusions were intruded in the ultramafics and metavolcanic rocks. ASTER data are an accurate and helpful tool for detecting and mapping alteration zones for gold exploration.


英文关键词ASTER data Lithological discrimination Gold mineralization Alteration zones Listwaenite
类型Article
语种英语
国家Egypt ; Germany
收录类别SCI-E
WOS记录号WOS:000334686100005
WOS关键词SPACEBORNE THERMAL EMISSION ; REFLECTION RADIOMETER ASTER ; PORPHYRY COPPER-DEPOSITS ; THEMATIC MAPPER DATA ; ARABIAN SHIELD ; OROGENIC GOLD ; AREA ; CLASSIFICATION ; EVOLUTION ; GENESIS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/180779
作者单位1.Natl Author Remote Sensing & Space Sci NARSS, Cairo, Egypt;
2.Karlsruhe Inst Technol, Inst Geowissensch, D-76187 Karlsruhe, FR, Germany
推荐引用方式
GB/T 7714
Salem, S. M.,Soliman, N. M.,Ramadan, T. M.,et al. Exploration of new gold occurrences in the alteration zones at the Barramiya District, Central Eastern Desert of Egypt using ASTER data and geological studies[J],2014,7(5):1717-1731.
APA Salem, S. M.,Soliman, N. M.,Ramadan, T. M.,&Greiling, R. O..(2014).Exploration of new gold occurrences in the alteration zones at the Barramiya District, Central Eastern Desert of Egypt using ASTER data and geological studies.ARABIAN JOURNAL OF GEOSCIENCES,7(5),1717-1731.
MLA Salem, S. M.,et al."Exploration of new gold occurrences in the alteration zones at the Barramiya District, Central Eastern Desert of Egypt using ASTER data and geological studies".ARABIAN JOURNAL OF GEOSCIENCES 7.5(2014):1717-1731.
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