【摘要】：論文的研究立足于火山巖型塊狀硫化物成礦理論,借鑒大陸硫化物資源評價的流程和方法,以北大西洋洋中脊為例,在收集、整理、分析該地區(qū)已有的水深、構(gòu)造、地球物理、地震火山、洋底基巖年齡等各方面數(shù)據(jù)資料的基礎(chǔ)上,總結(jié)北大西洋洋中脊熱液區(qū)的分布特征及其原因,建立多金屬硫化物資源的找礦標(biāo)志和找礦模型,運用地質(zhì)統(tǒng)計學(xué)的方法預(yù)測海底多金屬硫化物資源分布,圈定遠(yuǎn)景區(qū)。在此基礎(chǔ)上,為了進(jìn)一步圈定靶區(qū),在圈定的遠(yuǎn)景區(qū)中,對典型熱液區(qū)建立地質(zhì)體三維可視化模型,并用數(shù)值模擬方法進(jìn)行海底多金屬硫化物形成過程的數(shù)值模擬研究,結(jié)合模擬結(jié)果深入了解海底多金屬硫化物演化過程和成礦機(jī)制,分析控礦要素,圈定成礦有利部位,為資源預(yù)測提供理論依據(jù),形成海底多金屬硫化物資源模擬預(yù)測的技術(shù)方法流程,為海底多金屬硫化物資源預(yù)測提供重要參考。本研究取得的主要成果和創(chuàng)新點如下:1、實現(xiàn)了北大西洋洋中脊區(qū)域多金屬硫化物資源二維預(yù)測以現(xiàn)代成礦理論為指導(dǎo),綜合分析了區(qū)域成礦規(guī)律,系統(tǒng)地收集、整理、分析了北大西洋洋中脊地區(qū)水深、重力、磁力、火山地震、洋底基巖年齡等數(shù)據(jù)資料,總結(jié)了海底多金屬硫化物資源的控礦要素和找礦標(biāo)志,建立了北大西洋中脊地區(qū)海底多金屬硫化物資源的找礦模型,運用地質(zhì)統(tǒng)計學(xué)的方法對北大西洋中脊地區(qū)硫化物資源進(jìn)行預(yù)測,圈定出具有找礦潛力的多金屬硫化物勘探遠(yuǎn)景區(qū)。2、實現(xiàn)了典型海底多金屬硫化物熱液噴口區(qū)的三維模擬預(yù)測分析建立了北大西洋研究區(qū)三維地質(zhì)實體模型和三維塊體模型,實現(xiàn)了對北大西洋研究區(qū)深部三維形態(tài)的模擬;總結(jié)北大西洋研究區(qū)海洋地質(zhì)背景和海底多金屬硫化物的形成機(jī)制、形成過程,對典型多金屬硫化物熱液噴口區(qū)進(jìn)行了成礦過程的數(shù)值模擬研究,根據(jù)數(shù)值模擬的結(jié)果分析海底多金屬硫化物的形成機(jī)制,提取有利成礦條件,圈定出找礦靶區(qū)。3、形成海底多金屬硫化物資源預(yù)測的技術(shù)方法流程總結(jié)了海底多金屬硫化物資源的找礦標(biāo)志和找礦模型,掌握了典型多金屬硫化物熱液噴口區(qū)模擬預(yù)測的關(guān)鍵技術(shù)方法,形成了海底多金屬硫化物資源預(yù)測的技術(shù)方法流程,為以后的研究工作奠定了基礎(chǔ)。
[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.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P744

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