【摘要】：地質(zhì)與地球物理相結(jié)合的隱伏礦床定位預(yù)測是礦產(chǎn)勘查領(lǐng)域的世界性難題,相關(guān)的理論與技術(shù)是研究熱點。構(gòu)造是成礦的決定性因素,準(zhǔn)確識別控礦構(gòu)造是預(yù)測成功的首要條件,有利的成礦構(gòu)造部位就是含礦的構(gòu)造巖相帶。依據(jù)構(gòu)造巖相標(biāo)志及其物性參數(shù)特點,提出了面向找礦預(yù)測目標(biāo)的礦床地球物理類型劃分方案。擺脫經(jīng)濟指標(biāo)對礦體范圍的限制,將更大規(guī)模的含礦構(gòu)造巖相帶作為預(yù)測目標(biāo),提高了物探方法的識別精度,預(yù)測成功率隨之顯著提高。選擇膠東金礦集區(qū)內(nèi)受斷裂構(gòu)造控制的焦家、蓬家夼、七寶山3個典型金多金屬礦田,具體介紹了該預(yù)測方法的操作程序。首先,在詳細(xì)的地質(zhì)觀察測量基礎(chǔ)上,分析成礦規(guī)律,識別含礦構(gòu)造巖相帶,建立成礦地質(zhì)模型。然后,測量含礦地質(zhì)體的物性參數(shù),研究其分布規(guī)律和影響因素,進(jìn)而選擇有效的地球物理方法和觀測系統(tǒng),完成數(shù)據(jù)采集、處理和解釋,建立地質(zhì)-地球物理勘查模型,優(yōu)選找礦靶區(qū)靶位。最后,實施工程驗證,取得良好的找礦效果。
[Abstract]:The location and prediction of concealed deposits combined with geology and geophysics is a worldwide problem in the field of mineral exploration, and the related theories and techniques are the focus of research. Structure is the decisive factor of metallogenesis, and the accurate identification of ore-controlling structure is the first condition of successful prediction, and the favorable ore-forming structure is the metallogenic tectonic-lithofacies zone. According to the characteristics of tectonic lithofacies and their physical parameters, a scheme for the classification of geophysical types of ore deposits is proposed for the purpose of prospecting and prediction. In order to get rid of the limitation of economic indexes on the scope of orebody and take the ore bearing tectonic facies belt as the prediction target, the recognition accuracy of geophysical prospecting method is improved, and the success rate of prediction is improved significantly. Three typical gold polymetallic ore fields, Jiaojia, Pengjiakuang and Qibaoshan, which are controlled by fault structures in Jiaodong gold concentration area, are selected. The operation procedure of the prediction method is introduced in detail. Firstly, on the basis of detailed geological observation and survey, the metallogenic law is analyzed, and the metallogenic geological model is established by identifying the metallogenic tectonic lithofacies zone. Then, the physical parameters of ore-bearing geological bodies are measured, the distribution law and influencing factors are studied, and then effective geophysical methods and observation systems are selected to complete the data collection, processing and interpretation, and to establish the geological geophysical exploration model. The target position of the optimum selection prospecting area. Finally, engineering verification is carried out and good prospecting results are obtained.
【作者單位】： 中國科學(xué)院地質(zhì)與地球物理研究所中國科學(xué)院礦產(chǎn)資源研究重點實驗室;中國科學(xué)院大學(xué);
【基金】：中國科學(xué)院地質(zhì)與地球物理研究所自主創(chuàng)新研究項目(31351460)
【分類號】：P612

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