本文選題：流體包裹體 + 大廠銻礦�。� 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：晴隆大廠銻礦位于貴州省晴隆縣大廠鎮(zhèn),貴州是我國重要的銻礦產(chǎn)地之一。大地構(gòu)造位置位于華南-東南亞板塊,靠近特提斯—喜馬拉雅與瀕太平洋兩大全球構(gòu)造域的結(jié)合部位東側(cè),大地構(gòu)造位置很特殊,屬大陸板塊內(nèi)部范疇。前人對(duì)晴隆大廠銻礦床有過礦床地質(zhì)特征、銻的賦存形式、礦床地球化學(xué)特征和礦床成因等方面的研究,積累了一定的研究資料,礦床成因類型也只通過宏觀地質(zhì)特征進(jìn)行分類的,總體來說,研究程度相對(duì)薄弱。尤其是在成礦流體方面,前人對(duì)此沒有完善的流體包裹體研究成果,而成礦熱液特征與礦床成因息息相關(guān),運(yùn)用礦床地球化學(xué)特征分析可以獲取最直觀有效的信息。通過包裹體特征分析可以為礦床成因類型提供最有價(jià)值的證據(jù)。本文從大廠銻礦流體包裹體顯微巖相學(xué)入手,著重對(duì)流體包裹體進(jìn)行分析測試和相關(guān)計(jì)算(均一溫度、冰點(diǎn)、鹽度、壓力、成礦深度、流體包裹體成分等),判斷其成礦熱液類型并進(jìn)一步確立其礦床成因類型。通過對(duì)晴隆大廠銻礦的詳細(xì)野外地質(zhì)調(diào)查和樣品詳細(xì)分類分析,基本了解了該礦床的地質(zhì)特征和礦體的產(chǎn)狀、規(guī)模及數(shù)量,對(duì)礦床有了整體的認(rèn)識(shí)。微觀上進(jìn)行了薄片、光片和包裹體片的研究。利用偏光顯微鏡對(duì)薄片和光片進(jìn)行顯微巖相學(xué)、礦相學(xué)研究,了解礦床的礦物共生組合、礦物生成順序等信息。利用冷熱臺(tái)對(duì)包裹體片進(jìn)行流體包裹體測溫實(shí)驗(yàn),獲取流體包裹體的均一溫度和冰點(diǎn)數(shù)據(jù),進(jìn)而推算出鹽度、壓力、深度、密度等信息,對(duì)礦床的成礦環(huán)境、成礦流體性質(zhì)、成礦流體來源、成礦物質(zhì)運(yùn)移和沉淀方式進(jìn)行討論。最后結(jié)合前人對(duì)于穩(wěn)定同位素、包裹體氣液相成分等研究成果,建立晴隆大廠銻礦成礦模式。本次論文研究主要得到了以下認(rèn)識(shí)和成果:晴隆大廠銻礦礦床流體包裹體類型包括:氣液兩相包裹體、純液相包裹體,其中以純液相包裹體為主,氣液兩相包裹體次之,主要測定了氣液兩相液體型包裹體的完全均一溫度和冰點(diǎn),并通過公式計(jì)算出了石英流體包裹體鹽度、密度、壓力,大致推算了成礦深度。得出大廠銻礦成礦流體屬于低溫(132.3~243.0℃)、低鹽度(0.35~15.86wt%)、中等密度(0.8562~1.004g/cm3)。成礦深度為淺成(1.57km);成礦流體主要是大氣降水接觸地殼深部上升的巖漿形成的熱液。通過流體包裹體獲取的信息可以確定晴隆大廠銻礦屬淺成低溫?zé)嵋旱V床。
[Abstract]:Qinglong Dachang Antimony Mine is located in Dachang Town, Qinglong County, Guizhou Province. The tectonic position is located in the South China Southeast Asia plate, near the eastern side of the two major global tectonic domains of Tethys Himalaya and the Pacific Ocean. The geotectonic position is very special and belongs to the inner category of the continental plate. Previous studies on the geological characteristics, occurrence forms, geochemical characteristics and genesis of antimony deposits in the Dachang antimony deposit in Qinglong have accumulated a certain amount of research data. The genetic types of ore deposits are classified only by macroscopic geological characteristics, generally speaking, the degree of study is relatively weak. Especially in the aspect of ore-forming fluids, there is no perfect research on fluid inclusions, but the ore-forming hydrothermal characteristics are closely related to the genesis of the deposits, and the most direct and effective information can be obtained by using the geochemical characteristics of the deposits. The analysis of inclusion characteristics can provide the most valuable evidence for the genetic types of ore deposits. Starting with the microlithology of fluid inclusions in Dachang antimony deposit, this paper focuses on the analysis, testing and calculation of fluid inclusions (homogenization temperature, freezing point, salinity, pressure, ore-forming depth). The composition of fluid inclusions determines the ore-forming hydrothermal types and further establishes the genetic types of the deposits. Based on the detailed field geological investigation and sample classification analysis of Dachang antimony deposit in Qinglong, the geological characteristics and occurrence, scale and quantity of ore bodies are basically understood, and the overall understanding of the deposit is obtained. Microscopically, thin sheet, light sheet and inclusion sheet were studied. The microlithology and mineralogy of thin and light plates were studied by polarizing microscope to understand the mineral symbiotic assemblage and the sequence of mineral formation of the deposit. In this paper, the fluid inclusion temperature and freezing point data of fluid inclusions are obtained by using the cold and hot table to measure the temperature of fluid inclusions, and the information of salinity, pressure, depth, density and so on are calculated, and the ore-forming environment and ore-forming fluid properties of the deposits are obtained. The source of ore-forming fluid, the migration and precipitation of ore-forming materials are discussed. Finally, based on the previous studies on stable isotopes and gas-liquid composition of inclusions, a metallogenic model of Dachang antimony deposit in Qinglong is established. The main results of this paper are as follows: fluid inclusions in the Dachang antimony deposit in Qinglong include gas-liquid two-phase inclusions, pure liquid-phase inclusions, and gas-liquid two-phase inclusions, followed by gas-liquid two-phase inclusions. The complete homogenization temperature and freezing point of gas-liquid two-phase liquid inclusions were measured and the salinity density and pressure of quartz fluid inclusions were calculated by formula and the metallogenic depth was roughly calculated. The ore-forming fluid of Dachang antimony deposit belongs to low temperature (132.3 ~ 243.0 鈩，

本文編號(hào)：1987587