Gravimetric and magnetic characterization of structural controls on Sn-W ore deposits. A case study in the san finx deposit (A Coruña)

Q4 Earth and Planetary Sciences

Geogaceta Pub Date : 2022-06-06 DOI:10.55407/geogaceta99829

Alberto Santamaría Barragán, P. Ayarza Arribas, J. Alcalde, E. Saura, David Martí Linares, Imma Palomares, J. Élez

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Abstract

Critical raw materials are essential for the development of our society. However, most shallow ores have already been exploited and only deep targets remain unexplored. This work aims to apply indirect geophysical techniques to the San Finx Sn-W deposit (A Coruña) in order to get further constrains of its deep structure and geometry. Accordingly, a magnetic and a gravity survey have been carried out in the area (SE of Noia, A Coruña), at the southern part of the Malpica-Tui Complex. The resulting absolute magnetic anomaly and the relative gravity anomaly have been studied analytically and through 2-2.75D forward modeling. Results indicate that, the sampling interval (~1 km) is too high to characterize the anomalies related to the Sn-W mineralization. Contrarily, they show the potential field imprint of the regional Variscan tectonics. To better assess the relationship between the regional Variscan tectonics and the mineralization, a higher resolution survey should be acquired to detect this deposit.

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锡钨矿床构造控制因素的重磁特征。san finx矿床的案例研究(A Coruña)

关键原材料对我们社会的发展是必不可少的。然而，大多数浅层矿石已经被开采，只有深层目标尚未勘探。这项工作旨在将间接地球物理技术应用于San Finx Sn-W矿床(A Coruña)，以进一步了解其深层结构和几何形状。因此，在Malpica-Tui复合体南部的地区(Noia东南，a Coruña)进行了一次磁力和重力调查。通过2-2.75D正演模拟，对磁异常和重力异常进行了分析研究。结果表明，采样间隔(~1 km)过大，无法表征锡钨矿化异常。相反，它们显示了区域瓦里斯坎构造的势场印记。为了更好地评价区域瓦里斯坎构造与成矿作用的关系，需要对该矿床进行更高分辨率的探测。

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来源期刊

Geogaceta Earth and Planetary Sciences-Geology

CiteScore

0.40

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0.00%

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期刊介绍： Geogaceta is a magazine that publishes semiannually the Geological Society of Spain. This society aims to promote, promote, and disseminate knowledge, progress and applications of Geology; , the advice in scientific and educational matters to the institutions and entities that require it and the representation of the scientific interests of the geological community of Spain at international level. Its members have the right to participate in all the activities organized by the Company, to present their candidacy to any of their management positions and to receive free periodical publications of the Company (Geogaceta and Magazine of the Geological Society of Spain).