Potential Field, Geoelectrical and Reflection Seismic Investigations for Massive Sulphide Exploration in the Skellefte Mining District, Northern Sweden

IF 2 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Acta Geophysica Pub Date : 2016-12-28 DOI:10.1515/acgeo-2016-0088

S. Tavakoli, Mahdieh Dehghannejad, María Ángeles García Juanatey, Tobias E. Bauer, P. Weihed, S. Elming

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引用次数: 10

Abstract

Multi-scale geophysical studies were conducted in the central Skellefte district (CSD) in order to delineate the geometry of the upper crust (down to maximum ∼ 4.5 km depth) for prospecting volcanic massive sulphide (VMS) mineralization. These geophysical investigations include potential field, resistivity/induced polarization (IP), reflection seismic and magnetotelluric (MT) data which were collected between 2009 and 2010. The interpretations were divided in two scales: (i) shallow (∼ 1.5 km) and (ii) deep (∼4.5 km). Physical properties of the rocks, including density, magnetic susceptibility, resistivity and chargeability, were also used to improve interpretations. The study result delineates the geometry of the upper crust in the CSD and new models were suggested based on new and joint geophysical interpretation which can benefit VMS prospecting in the area. The result also indicates that a strongly conductive zone detected by resistivity/IP data may have been missed using other geophysical data.

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瑞典北部Skellefte矿区块状硫化物勘探的位场、地电和反射地震调查

在中央Skellefte区(CSD)进行了多尺度地球物理研究，以描绘上地壳(最大深度约4.5 km)的几何形状，以寻找火山块状硫化物(VMS)矿化。这些地球物理调查包括2009年至2010年间收集的势场、电阻率/感应极化(IP)、反射地震和大地电磁(MT)数据。解译分为两个尺度:(i)浅层(~ 1.5 km)和(ii)深层(~ 4.5 km)。岩石的物理性质，包括密度、磁化率、电阻率和电荷率，也被用来改进解释。研究结果圈定了CSD上地壳的几何形状，并在新的联合地球物理解释的基础上提出了新的模型，为该地区的VMS找矿提供了参考。结果还表明，电阻率/激电数据检测到的强导电带可能会被其他地球物理数据遗漏。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Geophysica 地学-地球化学与地球物理

CiteScore

3.90

自引率

13.00%

发文量

251

审稿时长

5.3 months

期刊介绍： Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.