本文選題：金礦　切入點(diǎn)：甘孜-理塘構(gòu)造帶　出處：《成都理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：中國經(jīng)濟(jì)的發(fā)展在進(jìn)入八十年代后突飛猛進(jìn),隨著我國人口的增長的速度加劇化,使得國內(nèi)對各類資源、能源的需求也進(jìn)入到了白熱化的階段,因此如何滿足人類對資源和能源的需求,保障人類經(jīng)濟(jì)的持續(xù)長期的發(fā)展,成為了現(xiàn)今社會(huì)發(fā)展的核心問題。目前我國的礦產(chǎn)開采過度情況加劇,對于金礦等直接影響經(jīng)濟(jì)市場的礦山的開采過度情況更為嚴(yán)重,現(xiàn)如今我國金礦的開發(fā)已達(dá)到探明儲(chǔ)量的2/3,黃金資源短缺,金礦儲(chǔ)量的虧空,使得金礦的下一步開發(fā)和開采對國家經(jīng)濟(jì)變得至關(guān)重要,對于金礦成礦規(guī)律的研究對國家經(jīng)濟(jì)發(fā)展,緩解金礦資源壓力,有著重大的研究意義及社會(huì)意義。甘孜-理塘構(gòu)造帶是一個(gè)規(guī)模巨大的金多金屬成礦構(gòu)造帶。該構(gòu)造帶北起青海玉樹,向南東經(jīng)馬尼干戈、甘孜、理塘、木拉到木里。甘孜-理塘構(gòu)造帶金礦雖經(jīng)過數(shù)十年的地質(zhì)勘查工作,發(fā)現(xiàn)了大量的金礦床及礦點(diǎn),但總體研究程度較低,大部分金礦(化)點(diǎn)僅開展初步地質(zhì)工作。為了爭取今后在該區(qū)取得找礦突破,本論文根據(jù)甘孜-理塘構(gòu)造帶地區(qū)區(qū)域地質(zhì)調(diào)查工作情況以及前人在這一地區(qū)對金礦研究的前期工作成果,對甘孜-理塘構(gòu)造帶北段金礦成礦構(gòu)造地質(zhì)特征及其成礦規(guī)律進(jìn)行總結(jié)。在系統(tǒng)的野外地質(zhì)調(diào)查基礎(chǔ)上,就該構(gòu)造帶上的典型金礦床成礦地質(zhì)構(gòu)造特征進(jìn)行了分述和對比。總結(jié)出區(qū)內(nèi)金礦床(點(diǎn))的空間分布明顯地受韌性剪切帶控制,韌性剪切帶主要表現(xiàn)為早期北東向南西的逆沖和后期沿近北西-北北西-西北向平移剪切構(gòu)造改造疊加,屬于義敦島弧與揚(yáng)子板塊之間俯沖碰撞后期反向逆沖構(gòu)造環(huán)境的產(chǎn)物。研究區(qū)內(nèi)金礦成礦作用與早期北東向南西和南西向北東的雙向?qū)_推覆構(gòu)造作用密切有關(guān)。礦體圍巖可見鐵白云石化、絹云母化、鉻云母化、碳酸鹽化和石墨化等圍巖蝕變,礦體形態(tài)、產(chǎn)狀均受構(gòu)造控制,層間破碎帶及層間裂隙是礦液運(yùn)移的通道及容礦場所,控制著礦體的分布及規(guī)模。區(qū)內(nèi)次級構(gòu)造十分發(fā)育,斷裂和裂隙發(fā)育,利于礦液的運(yùn)移、富集、充填和交代,形成南北和北東-南西走向的含礦帶,為后期成礦提供了有利場所。
[Abstract]:With the rapid development of China's economy since 80s, with the rapid growth of the population in China, the domestic demand for all kinds of resources and energy has also entered the stage of white-hot. Therefore, how to meet the needs of human resources and energy resources and ensure the sustained and long-term development of human economy has become the core problem of social development. For mines that directly affect the economic market, such as gold mines, the excessive mining situation is even more serious. Nowadays, the development of gold deposits in China has reached 2 / 3 of the proven reserves, the shortage of gold resources and the deficit of gold reserves. It makes the next development and mining of gold ore become very important to the national economy, and the study of the metallogenic law of gold ore is of great importance to the national economic development and relieve the pressure of gold resources. It is of great significance in research and society. The Ganzi-Litang structural belt is a large gold-polymetallic metallogenic tectonic belt. The tectonic belt starts from Yushu in Qinghai Province to the north, longes Manigango, Ganzi, and Litang to the south. Although the gold deposits in Mula to Muli. Ganzi-Litang structural belt have been discovered after decades of geological exploration work, a large number of gold deposits and ore sites have been discovered, but the overall level of research is relatively low. Most gold (chemical) sites only carry out preliminary geological work. In order to achieve a breakthrough in prospecting in the area in the future, This paper is based on the regional geological survey in the Ganzi-Litang structural zone and the previous work on gold deposits in this area. The geological characteristics and metallogenic regularity of gold deposits in the northern section of the Ganzi-Litang structural belt are summarized. The metallogenic geological characteristics of typical gold deposits in this tectonic belt are described and compared. It is concluded that the spatial distribution of gold deposits (points) in this area is obviously controlled by ductile shear zones. The ductile shear zone is mainly characterized by the early thrust from NNE to NW and the superposition of shearing tectonics along the NNW-NW-NW direction in the late stage. It is the product of reverse thrust tectonic environment in the late period of subduction collision between Yidun island arc and Yangtze plate. Gold mineralization in the study area is closely related to the early north-east-west and south-west two-way counter-nappe tectonics. Iron dolomitization can be seen in the surrounding rock of the orebody, The alteration of surrounding rock, such as sericite, chromium mica, carbonization and graphitization, the shape and occurrence of orebody are controlled by structure. The interlayer fracture zone and interlayer fissure are the passageway and place of ore liquid migration. The distribution and scale of orebodies are controlled. The secondary structures, faults and fissures are well developed in the area, which is conducive to the migration, enrichment, filling and metasomatism of ore fluids, and the formation of ore-bearing belts along the north-south and north-east-west strike. It provides a favorable place for late mineralization.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.51

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本文編號(hào)：1632027