3D joint inversion of Gradient and Mise-a-la-Masse borehole IP/Resistivity data and its application to magmatic sulfide mineral deposit exploration

被引：5

作者：

Wondimu, Haileyesus D. ^{[1
,2
]}

Mammo, Tilahun ^{[1
]}

Webster, Blaine ^{[3
]}

机构：

[1] Addis Ababa Univ, Sch Earth Sci, Addis Ababa, Ethiopia

[2] 68 Ridgemore Cres, Brampton, ON L7A 2L4, Canada

[3] 27 Blue Spruce Lane, Thornhill, ON L3T 3W8, Canada

来源：

ACTA GEOPHYSICA | 2018年 / 66卷 / 05期

关键词：

Mise-a-la-Masse; Gradient; Borehole Ip/Resistivity; Chargeability; Inversion; Conductivity; RESISTIVITY;

D O I：

10.1007/s11600-018-0199-x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Gradient and Mise-a-la-Masse IP/Resistivity surveys were conducted on a group of 19 boreholes in Eagle's Nest, Eagle One magmatic sulfide deposit in northern Ontario, Canada. The surveys were conducted as a follow-up to the many drilled boreholes, some of which missed the target. The surveys were intended to map the distribution of the ore mineralization, outline the deposit hosted by mafic and ultramafic rocks and then guide the drilling of new boreholes. Joint Gradient and Mise-a-la-Masse data inversion produced 3D chargeability and conductivity models. The inverted 3D models in turn help delineate the outline of the mineralized zone, and determine the shape, size, strength and economic viability of the deposit. The Gradient array determined the direction of the mineralization with respect to the boreholes, and the Mise-a-la-Masse array examined the highly conductive subsurface bodies and their surroundings. The mapped ore zone shows close similarity to the 0.5 Cu% and 1.05 Ni% iso-surfaces that are produced from core assay result confirming the reliability of the results obtained in this study.

引用

页码：1031 / 1045

页数：15