干旱区生态环境知识资源中心(Arid): Potential-field geophysical data inversion for 3D modelling and reserve estimation (Example of the Hajjar mine, Guemassa massif, Morocco): magnetic and gravity data case

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DOI	10.5802/crgeos.10
	Potential-field geophysical data inversion for 3D modelling and reserve estimation (Example of the Hajjar mine, Guemassa massif, Morocco): magnetic and gravity data case
	Soulaimani, Saad; Chakiri, Said; Manar, Ahmed; Soulaimani, Ayoub; Miftah, Abdelhalim; Bouiflane, Mustapha
通讯作者	Soulaimani, S
来源期刊	COMPTES RENDUS GEOSCIENCE
ISSN	1631-0713
EISSN	1778-7025
出版年	2020
卷号	352 期号:2 页码:139-155
英文摘要	Geophysical data inversion is a tool, which can be used to recover the subsurface distribution of physical properties from field data. Each type of geophysical data can be inverted using one or more inversion algorithms. In this paper, a set of geophysical magnetic and gravity data of the Hajjar area in Morocco, covering an extent of 3.2 x 1.6 km(2), were used to make a 3D model of an orebody and to estimate the mineral reserve by potential-field geophysical data inversion and excess mass estimation. We thus promote the development and application of potential-field geophysical data inversion using the softwares Geosoft Oasis Montaj and Voxi Earth Modelling (TM) and the evaluation of its power compared to the excess mass estimation method. The process of inversion begins with data processing. then moves to analysis and interpretation, and ends with unconstrained Cartesian cut cell inversion. The results show a variation of -0.22 mGal to 1.59 inGal for the gravity residual anomaly map, leading to have density variations from 2.45 g/cm(3) to 4.22 g/cm(3), and a variation of -232 nT to 1018 nT for the reduced magnetic anomaly map. Moreover, data inversion allowed us to create a 3D model of the orebody and of the adjacent geological formation, and to estimate the different parameters that characterize the orebody derived from the inversion results, which have been confirmed from survey data: (depth approximate to 160 m; maximum density approximate to 4.22 g/cm(3); minimum density approximate to 3 g/cm(3); mean density approximate to 3.61 g/cm(3); thickness of the overburden approximate to 120 m; dip approximate to 45 degrees; morphology approximate to lens; volume approximate to 4.8 x 10(6) m(3)). It was therefore possible to evaluate the reserve, and to validate the reliability of the inversion by having a root mean square error between the exploited reserve and the calculated reserve of 13.5%, i.e. an insignificant difference between the real and calculated magnetic and gravity orebody responses, which support the validity of the results.
英文关键词	Geophysical data inversion Cartesian cut cell inversion Density Susceptibility Hajjar mine
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000587629900003
WOS关键词	ANOMALIES
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/2XILL650/327409
作者单位	[Soulaimani, Saad] Rabat Sch Mines, Min Engn Dept, Ave Hadj Ahmed Cherkaoui,BP 753, Rabat, Morocco; [Chakiri, Said; Soulaimani, Ayoub] Ibn Tofail Univ, Fac Sci, Dept Geol, Geosci Lab Nat Resources, BP 133, Kenitra 14000, Morocco; [Manar, Ahmed] Minist Energy Mines & Environm, Directorate Geol, BP 6208, Rabat, Morocco; [Miftah, Abdelhalim] Hassan I Univ, Fac Sci & Technol, Res Team Geol Min & Energet Resources, BP 577, Settat, Morocco; [Bouiflane, Mustapha] Mohammed V Univ, Sci Inst, Dept Earth Sci, Ave Ibn Batouta,BP 703, Rabat 10106, Morocco
推荐引用方式 GB/T 7714	Soulaimani, Saad,Chakiri, Said,Manar, Ahmed,et al. Potential-field geophysical data inversion for 3D modelling and reserve estimation (Example of the Hajjar mine, Guemassa massif, Morocco): magnetic and gravity data case[J],2020,352(2):139-155.
APA	Soulaimani, Saad,Chakiri, Said,Manar, Ahmed,Soulaimani, Ayoub,Miftah, Abdelhalim,&Bouiflane, Mustapha.(2020).Potential-field geophysical data inversion for 3D modelling and reserve estimation (Example of the Hajjar mine, Guemassa massif, Morocco): magnetic and gravity data case.COMPTES RENDUS GEOSCIENCE,352(2),139-155.
MLA	Soulaimani, Saad,et al."Potential-field geophysical data inversion for 3D modelling and reserve estimation (Example of the Hajjar mine, Guemassa massif, Morocco): magnetic and gravity data case".COMPTES RENDUS GEOSCIENCE 352.2(2020):139-155.