【作者】 龙露珍；

【导师】 胡斌；

【作者基本信息】 中南大学 ， 构造地质学， 2009， 硕士

【摘要】 本文在系统总结分析前人资料的基础上,通过野外地质调查,结合室内样品测试分析,对内蒙古东升庙矿区三贵口南矿段的地层、构造、矿体、矿床等方面进行深入的研究,取得了较深入的认识,提出了矿床成因新观点并建立了成矿模式。1、通过实测地质剖面得出矿区地层主要为中元古界狼山群,由下至上为一岩组、二岩组和三岩组,其中二岩组是区内的含矿层位,区内最大的9号矿体就赋存于其中的三岩段（Pt₂ln₂³）中。2、通过对矿区主要构造性质、规模、形态及分布规律的研究,查明了主要控矿构造空间形态及其变化。矿体主要受晋宁期中期褶皱那云山向斜和那云山北背斜褶皱的控制,断裂（层）对矿体的连续性没有影响。3、在三贵口南矿段圈定了多个产于狼山群中的矿体,确定了矿体的形状主要呈层状、似层状、局部透镜状。4、通过对稀土元素的分析,∑LREE与∑HREE的比值表明成岩物质来自陆源,Ce亏损说明矿区岩石的原岩主要是还原环境下海相沉积作用形成。5、东升庙矿区黄铁矿Co/Ni值既有大于1的也有小于1的,表明东升庙矿床具有海底热液喷流沉积的特点。6、根据本区成矿地质特征及矿床地球化学特征,提出了东升庙矿床为海底喷流沉积-后期热液改造矿床,并建立了相应的成矿模式。更多还原

【Abstract】 On the basis of generally analyzing the previous data and references, in combination with geological survey and sample analysis, this paper has dealt with the strata, structures, ore bodies and mineral deposits of the southern parts of Sanguikou at Dongshengmiao in the Inner Mongolia, the new viewpoints on the genesis of ore deposits in this area have been worked out and the metallogenic models established.1、Through measuring the Geological section in this area, which shows that the strata comes mainly from Mesoproterozoic Langshan group, which can be divided into three formations from bottom to upper: the first formation, the second formation and the third formation. The second formation is the host stratus, where the 9th ore body which is the largest one in this deposit occurs.2、By means of researching the size, shape and distribution of the main structures in this region, the author has identified the spatial patterns and changes of the main ore-controlling structures, and found that the ore bodies are strictly controlled by the Nayun mountain syncline and the Northern parts of Nayun mountain anticline, however, which can not affect the continuity of the ore bodies.3、The multiple ore reserves have been blocked out at the southern parts of Sanguikou, and the author has identified that the shapes of the main ore bodies which host in the Langshan group are mainly layered, stratiform-like and Partial lenticular.4、According to the analyses of rare earth elements(REE), together with the ratios ofΣLREE andΣHREE, which shows that the ore-forming Materials come from land-based sources, and Ce losses means that the pre-existing rocks in this region formed in marine reducing environment.5、The ratios of Co/Ni of Pyrite in this deposits are more than one or less than one, which shows that the Dongshengmiao deposits is characterized by SEDEX.6、According to the geological features of mineralization and varieties chemical tests in this area, the results show that Dongshengmiao deposit is an SEDEX reformed by the late hydrothermal fluid, SEDEX mineralization is the main period, the late hydrothermal fluid result in the further enrichment of ore-forming elements in the ore bodies, and then the metallogenic models have been established.更多还原