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Regional magnetic and gravity structures and distribution of mineral deposits in Central Iran: Implications for mineral exploration
Journal of Asian Earth Sciences ( IF 3 ) Pub Date : 2021-05-14 , DOI: 10.1016/j.jseaes.2021.104828
Hassan Kheyrollahi , Firouz Alinia , Abdolreza Ghods

Regional-scale magnetic and gravity data have been enhanced to identify major structures and distinguish geophysical blocks in order to evaluate the distribution of major mineral deposits and prospects in Central Iran. Major structures and coherent magnetic blocks have been defined from magnetic data enhanced using a combination of upward continuation and edge enhancement filters. Broad-scale regional structural architecture and coherent density blocks have been defined from gravity data enhanced using the tilt angle. Crustal thickness was calculated from Bouguer gravity data. Integration of the structures, magnetic, density and depth characteristics derived from the complementary geophysical techniques have been used to correlate and interpret the regional distribution of mineral deposits and occurrences to assist future exploration. Porphyry Cu deposits in the Kerman metallogenic zone are shown to be closely associated with major structures in high magnetic and gravity blocks that are coincident with the Tertiary volcanic units, and in areas where the crustal zone was interpreted to be more than 50 km thick. Pb–Zn deposits in Central Iranian Microcontinent are shown to be spatially associated with major structures, predominantly outside of the high magnetic response blocks, and commonly overlay the low gravity and thick crustal zones. In the north of the study area, one group of Fe deposits display a close correlation to blocks with both a high magnetic and high gravity response. Along strike to the southeast, a second group cluster is seen in an area with a moderate magnetic and a low gravity response.



中文翻译:

伊朗中部矿床的区域磁性和重力结构及分布:对矿产勘探的启示

区域尺度的磁力和重力数据已得到增强,以识别主要结构并区分地球物理区块,以评估伊朗中部主要矿床的分布和前景。主要结构和相干磁块是从使用向上延续和边缘增强滤波器的组合增强的磁数据中定义的。大尺度区域结构结构和相干密度块已根据使用倾斜角增强的重力数据定义。根据布格重力数据计算地壳厚度。来自互补地球物理技术的结构、磁性、密度和深度特征的整合已被用于关联和解释矿床和矿点的区域分布,以协助未来的勘探。克尔曼成矿带中的斑岩铜矿床被证明与与第三纪火山单元重合的高磁和重力块体中的主要构造密切相关,并且在地壳带被解释为超过 50 公里厚的地区。伊朗中部微大陆的铅锌矿床在空间上与主要构造有关,主要在高磁响应块之外,通常覆盖在低重力和厚地壳带上。在研究区的北部,一组铁矿床显示出与具有高磁和高重力响应的块体密切相关。沿着东南走向,在一个中等磁力和低重力响应的区域可以看到第二组星团。

更新日期:2021-06-05
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