新疆惠井子南山地球化学异常信息的识别与综合评价

发布时间：2018-05-08 20:01

  本文选题：地质统计学 + 多元统计法　； 参考：《西北师范大学》2015年硕士论文

【摘要】：本文通过对新疆惠井子南山地区岩屑化探数据进行传统方法、相关性分析法、泛克里金法对和多重分形滤波技术相结合的方法,对新疆惠井子南山地区成矿能量异常信息进行分析,研究疆惠井子南山地区综合异常信息在区域地质背景下的成矿有利性、综合异常的区域变化特征、局部矿化异常特征、区域背景信息及异常的控制因素,以此获取不同层次的综合异常信息及控矿因素。对研究区采集的693件样品的9种元素含量进行统计分析并且结合野外地质调查综合分析,确定Sb元素在研究区属于相对富集元素,且活化和迁移作用强烈,在有利的地质情况下极有可能成矿。因此确定其为本研究区成矿能量的主攻元素。并且对9种元素含量运用传统迭代法和多重分形两种方法进行异常下限的提取。使用分形方法确定异常下限与实际勘查结果吻合程度较高,反映了实际的异常范围。由研究区地质略图和泛克里金法获取的综合成矿能量异常图进行对比分析可知,异常分布受到F2北西西向主断裂的控制,可以推测其成矿过程可能跟断裂构造有关的岩浆热液作用具有一定的关联,可能是中石炭统的安山玢岩侵入围岩中,在有利的部位富集成矿。因此中石炭统的安山玢岩可作为该区域寻找Sb矿化点的指示性岩性特征,其成矿能量异常变化特征具有明显的裂控和岩控特征。泛克里金法能很好的揭示出成矿能量的空间结构变化特征及其控制因素,通过对成矿能量运用变差函数研究表明：新疆惠井子南山地区成矿能量的最大变程为2.4kmn,最大变程的方向为320°,这与区域内的主断裂带F2断裂基本一致,具有较好的连续性。在变差函数中成矿能量连续性变化的最大变程为2.4km,说明在研究区岩浆岩的范围之内具有较好的连续性。块金效应25%,说明成矿能量在变程范围内具有较强的相关性比较高其块金效应,表明成矿能量表现出较强的结构性特征。运用泛克里金法获得的异常和运用多重分形滤波(S-A)法获取的成矿能量的异常进行比较可知：多重分形滤波(S-A)法能够提取多层次的致矿异常信息,其中包括了成矿能量的区域异常和隐伏异常或者背景中的弱异常和隐蔽异常。通过多重滤波方法提取的不同层次的异常为下一步工作提供了新的研究靶区。通过成矿能量的确定成矿有利地段为：Ⅰ级、Ⅱ级、Ⅲ级和Ⅳ级。通过对这四个异常区进行分析可以知道,Ⅰ级有利地段为研究区的异常高值区同时也是寻找Sb矿的有利靶区。Ⅱ级有利地段为Au、Pb、Sb热液型金多金属矿远景区；Ⅲ级成矿有利地段可作为寻找Mo、Sb、Bi热液型多金属矿的次级找矿远景区。通过对背景和异常的异常信息的关联分析,得出有利于矿化的解释,指示隐伏矿床的分布位置和寻求未知矿床提供了新的启示。
[Abstract]:In this paper, the traditional method, correlation analysis method, pankrikriging method and multifractal filtering method are used to analyze the lithic debris geochemical data in Nanshan area of Huijingzi, Xinjiang. This paper analyzes the information of metallogenic energy anomaly in Nanshan area of Huijingzi, Xinjiang, and studies the metallogenic advantage, regional variation characteristics and local mineralization anomaly characteristics of comprehensive anomaly information in Nanshan area of Huizinzi area in Xinjiang under the regional geological background. The regional background information and the controlling factors of anomalies are used to obtain different levels of synthetic anomaly information and ore controlling factors. The contents of 9 elements of 693 samples collected in the study area were statistically analyzed and combined with the comprehensive analysis of field geological survey, it was determined that SB elements were relatively enriched in the study area, and the activation and migration of SB elements were strong. Mineralization is highly likely to occur in favourable geological conditions. Therefore, it is determined to be the main attack element of ore-forming energy in this study area. Nine element contents were extracted by traditional iterative method and multifractal method. The fractal method is used to determine the lower limit of anomalies, which is consistent with the actual exploration results, which reflects the actual range of anomalies. Based on the comparative analysis of the geological map of the study area and the comprehensive metallogenic energy anomaly obtained by the pankriging method, it can be seen that the distribution of the anomaly is controlled by the main fault in the NWW direction of F2. It can be inferred that the metallogenic process may be related to the magmatic hydrothermal process related to the fault structure, and it may be that the Anshan porphyrite of the Middle Carboniferous intruded into the surrounding rock and enriched in the favorable position. Therefore, the Anshan porphyrite of the Middle Carboniferous can be regarded as an indicative lithologic feature in the search for SB mineralization points in this area, and the characteristics of abnormal variation of metallogenic energy have obvious characteristics of fissure control and rock control. The pankrikriging method can reveal the characteristics of the spatial structure of ore-forming energy and its controlling factors. By using variation function of metallogenic energy, it is shown that the maximum range of metallogenic energy is 2.4 kmnand the direction of maximum variation is 320 掳in Nanshan area, Huizinzi, Xinjiang, which is basically consistent with the F2 fault in the main fault zone in Xinjiang, and has good continuity. The maximum variation range of ore-forming energy continuity in the variation function is 2.4 km, which indicates that there is good continuity in the range of magmatic rock in the study area. The bulk-gold effect shows that the ore-forming energy has strong correlation in the range of variation range and its block gold effect is higher, which indicates that the ore-forming energy has strong structural characteristics. The comparison between the anomaly obtained by pankrikriging method and the anomaly of metallogenic energy obtained by multifractal filter S-A method shows that the multi-fractal filter S-A method can extract multi-level information of ore forming anomaly. It includes regional anomaly and concealed anomaly of metallogenic energy or weak anomaly and concealed anomaly in background. The different levels of anomalies extracted by multiple filtering provide a new research target for the next step. Through the determination of ore-forming energy, the favorable metallogenic areas are: 鈪，

本文编号：1862835