北大西洋海底多金属硫化物资源定量预测与评价

发布时间：2018-10-05 09:58

【摘要】：论文的研究立足于火山岩型块状硫化物成矿理论,借鉴大陆硫化物资源评价的流程和方法,以北大西洋洋中脊为例,在收集、整理、分析该地区已有的水深、构造、地球物理、地震火山、洋底基岩年龄等各方面数据资料的基础上,总结北大西洋洋中脊热液区的分布特征及其原因,建立多金属硫化物资源的找矿标志和找矿模型,运用地质统计学的方法预测海底多金属硫化物资源分布,圈定远景区。在此基础上,为了进一步圈定靶区,在圈定的远景区中,对典型热液区建立地质体三维可视化模型,并用数值模拟方法进行海底多金属硫化物形成过程的数值模拟研究,结合模拟结果深入了解海底多金属硫化物演化过程和成矿机制,分析控矿要素,圈定成矿有利部位,为资源预测提供理论依据,形成海底多金属硫化物资源模拟预测的技术方法流程,为海底多金属硫化物资源预测提供重要参考。本研究取得的主要成果和创新点如下:1、实现了北大西洋洋中脊区域多金属硫化物资源二维预测以现代成矿理论为指导,综合分析了区域成矿规律,系统地收集、整理、分析了北大西洋洋中脊地区水深、重力、磁力、火山地震、洋底基岩年龄等数据资料,总结了海底多金属硫化物资源的控矿要素和找矿标志,建立了北大西洋中脊地区海底多金属硫化物资源的找矿模型,运用地质统计学的方法对北大西洋中脊地区硫化物资源进行预测,圈定出具有找矿潜力的多金属硫化物勘探远景区。2、实现了典型海底多金属硫化物热液喷口区的三维模拟预测分析建立了北大西洋研究区三维地质实体模型和三维块体模型,实现了对北大西洋研究区深部三维形态的模拟;总结北大西洋研究区海洋地质背景和海底多金属硫化物的形成机制、形成过程,对典型多金属硫化物热液喷口区进行了成矿过程的数值模拟研究,根据数值模拟的结果分析海底多金属硫化物的形成机制,提取有利成矿条件,圈定出找矿靶区。3、形成海底多金属硫化物资源预测的技术方法流程总结了海底多金属硫化物资源的找矿标志和找矿模型,掌握了典型多金属硫化物热液喷口区模拟预测的关键技术方法,形成了海底多金属硫化物资源预测的技术方法流程,为以后的研究工作奠定了基础。
[Abstract]:Based on the ore forming theory of volcanic massive sulphide and drawing lessons from the process and method of continental sulphide resource evaluation, taking the mid-ocean ridge of the North Atlantic Ocean as an example, this paper collects, collates and analyses the existing water depth, structure, geophysics in this area. Based on the data of seismic volcanoes and ocean floor bedrock ages, this paper summarizes the distribution characteristics and causes of hydrothermal region in the mid-ocean ridge of the North Atlantic Ocean, and establishes the prospecting criteria and prospecting models for polymetallic sulphide resources. The distribution of submarine polymetallic sulphide resources is predicted by geostatistics method, and the Dingyuan scenic spot is surrounded. On this basis, in order to further delineate the target area, the 3D visualization model of geological body is established in the delineated prospective area, and the numerical simulation of the formation process of submarine polymetallic sulphide is carried out by means of numerical simulation. Combined with the simulation results, the evolution process and metallogenic mechanism of submarine polymetallic sulphides are deeply understood, the ore-controlling elements are analyzed, and the favorable metallogenic positions are delineated, which provides a theoretical basis for the prediction of resources. The process of simulation and prediction of submarine polymetallic sulphide resources is formed, which provides an important reference for submarine polymetallic sulphide resources prediction. The main achievements and innovations of this study are as follows: 1. The two-dimensional prediction of polymetallic sulphide resources in the mid-ocean ridge region of the North Atlantic Ocean is realized. Based on the modern metallogenic theory, the regional metallogenic regularity is comprehensively analyzed and systematically collected and sorted out. The data of water depth, gravity, magnetic force, volcanic earthquake and age of ocean floor bedrock in the mid-ocean ridge area of the North Atlantic are analyzed, and the ore-controlling elements and ore-prospecting criteria of submarine polymetallic sulphide resources are summarized. A prospecting model of submarine polymetallic sulphide resources in the middle ridge area of the North Atlantic Ocean is established, and the sulphide resources in the middle ridge area of the North Atlantic Ocean are forecasted by the method of geostatistics. The prospecting area of polymetallic sulphide with prospecting potential is defined. 2. The 3D simulation prediction analysis of typical submarine polymetallic sulphide hydrothermal vent area is realized. The three-dimensional geological entity model and three-dimensional block model of the North Atlantic study area are established. In this paper, the deep 3D shape of the North Atlantic study area is simulated, and the marine geological background and the formation mechanism and process of submarine polymetallic sulphides in the North Atlantic study area are summarized. The metallogenic process of typical polymetallic sulphide hydrothermal vents was studied by numerical simulation. According to the results of numerical simulation, the formation mechanism of submarine polymetallic sulphide was analyzed, and the favorable metallogenic conditions were extracted. Delineating the prospecting target area. 3, forming the technical process of prediction of submarine polymetallic sulphide resources. The prospecting criteria and prospecting models of submarine polymetallic sulphide resources are summarized. The key technical methods of simulating and predicting typical polymetallic sulphide hydrothermal vent area are mastered, and the technical method flow of submarine polymetallic sulphide resource prediction is formed, which lays a foundation for future research work.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P744

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