干旱区生态环境知识资源中心(Arid): Supergene Mass-Balance Study Assuming Zero Lateral Copper Flux Using Geostatistics to Recognize Metal Source Zones in Exotic Copper Deposits

Arid

DOI	10.1007/s11053-018-09449-2
	Supergene Mass-Balance Study Assuming Zero Lateral Copper Flux Using Geostatistics to Recognize Metal Source Zones in Exotic Copper Deposits
	Arabpour, Alireza 1; Asghari, Omid 2; Mirnejad, Hassan 1,3
通讯作者	Asghari, Omid
来源期刊	NATURAL RESOURCES RESEARCH
ISSN	1520-7439
EISSN	1573-8981
出版年	2019
卷号	28 期号:4 页码:1353-1370
英文摘要	Recognition of effective factors that influence the spatial extension of supergene weathering zones is important both for the identification of high potential areas of exotic deposits and for the cost-effective planning of mining. In particular, recognition of exotic mineralization around porphyry copper deposits early in mine development prevents them from being buried beneath mine infrastructures such as waste dump and tailing structures. Mass-balance modeling, a practical method for determining high potential areas of undiscovered exotic mineralization, investigates important factors in forming exotic deposits. Mass-balance modeling is a two-phase methodology that becomes progressively more detailed. An initial result, presented here as phase 1, is based solely on Cu assays. Phase 2 incorporates relict sulfide mineral studies to improve phase 1 modeling results and computes actual fluxes of copper that escaped vertically downward from the leached cap to form the enrichment blanket and then flowed laterally away to form exotic mineralization. In addition, geostatistical approaches, especially sequential Gaussian simulation, are useful tools for investigating the spatial relationships and modeling of mass-balance results in phase 1 studies. This paper introduces a method for interpolation and downscaling of the preliminary mass-balance analysis (phase 1) to highlight the role of geological features in the evolution of the supergene process. Using only copper assays without any need for relict sulfide mineralogy, this approach can be used to approximately identify the geographic direction of metal movement in exotic copper deposits, and thus serve as an initial exploration guide in prospecting for exotic deposits. For this, a vertical columnar block model was constructed for each of the supergene weathering zones and preliminary analysis of mass balance was conducted to reconstruct the apparent total leached zone column height assuming zero lateral flux. This analysis was applied to each of the vertical block model columns. The results of mass balance were interpolated in a 5 x 5 m grid by sequential Gaussian simulation method, and the simulated surface of the total leached zone was conflated with geological features. The roles of topography, argillic alteration and linear structures were identified in the transport of supergene solutions in the Miduk porphyry copper deposit of Iran. In the northern section of the deposit, which is in accordance with the topography gradient and the presence of advanced argillic alteration zone, the computed top total of leaching is below the actual surface topography, whereas the hypogene isograd curves confirm the expansion of primary copper in these areas. The northern section of the deposit was introduced as a susceptible area for the removal of copper-bearing solutions from the supergene enrichment system.
英文关键词	Mass-balance modeling Supergene process Exotic copper Porphyry copper deposit Geostatistics Sequential Gaussian simulation
类型	Article
语种	英语
国家	Iran ; USA
收录类别	SCI-E
WOS记录号	WOS:000485321200009
WOS关键词	SEQUENTIAL GAUSSIAN SIMULATION ; SPATIAL-DISTRIBUTION ; ATACAMA DESERT ; ENRICHMENT ; EVOLUTION ; MINERALIZATION ; DISTRICT ; IRAN
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/2XILL650/217734
作者单位	1.Univ Tehran, Coll Sci, Sch Geol, Tehran, Iran; 2.Univ Tehran, Univ Coll Engn, Sch Min Engn, Simulat & Data Proc Lab, Tehran, Iran; 3.Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH 45056 USA
推荐引用方式 GB/T 7714	Arabpour, Alireza,Asghari, Omid,Mirnejad, Hassan. Supergene Mass-Balance Study Assuming Zero Lateral Copper Flux Using Geostatistics to Recognize Metal Source Zones in Exotic Copper Deposits[J],2019,28(4):1353-1370.
APA	Arabpour, Alireza,Asghari, Omid,&Mirnejad, Hassan.(2019).Supergene Mass-Balance Study Assuming Zero Lateral Copper Flux Using Geostatistics to Recognize Metal Source Zones in Exotic Copper Deposits.NATURAL RESOURCES RESEARCH,28(4),1353-1370.
MLA	Arabpour, Alireza,et al."Supergene Mass-Balance Study Assuming Zero Lateral Copper Flux Using Geostatistics to Recognize Metal Source Zones in Exotic Copper Deposits".NATURAL RESOURCES RESEARCH 28.4(2019):1353-1370.