膠西北焦家式金礦控礦構(gòu)造蝕變帶的地球化學(xué)標(biāo)志
[Abstract]:Gold deposits play an important role in the exploration and production of gold in Jiaobei area, and the prospecting potential is great. One of the effective ways to solve the problem of deep and peripheral geological prospecting in this area is to propose a new quantitative prospecting marker. Taking Jiaojia-type gold deposit as an example, according to the results of rock survey from boreholes, it is considered that the deposit is a metamorphic ore deposit with Mesozoic tectonic hydrothermal superposition on the basis of the initial source rock, and the geochemical markers of the deposit are analyzed and summarized. The results show that the formation of Jiaojia-type gold deposit is controlled by the foundation of the initial source rock, which is characterized by au enrichment and significant S enrichment. On the basis of the initial source rocks, the late hydrothermal activity occurred in the tectonic alteration zone, which led to the reactivation and migration of elements in the source rocks. The typical geochemical marker is the depletion of elements such as Na2O and the formation of negative anomalies. In a word, the positive anomaly formed by the enrichment of elements such as Au-S is the geochemical marker of the initial source rock, while the negative anomaly formed by the depletion of elements such as Naal _ 2O is the geochemical marker of the ore-controlling structural alteration zone.
【作者單位】: 中國地質(zhì)科學(xué)院地球物理地球化學(xué)勘查研究所;中國地質(zhì)科學(xué)院;山東省第六地質(zhì)礦產(chǎn)勘查院;
【基金】:國家科技支撐計(jì)劃項(xiàng)目(2014BAB05B00)
【分類號(hào)】:P618.51
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