本文選題：老柞山金礦 + 地質(zhì)特征��； 參考：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文

【摘要】：老柞山金礦田是黑龍江省重要的黃金產(chǎn)地之一,也是該省的第二大巖金礦床。本文通過對前人工作、資料的整理和概括,結(jié)合野外地質(zhì)勘查及樣品的處理,對礦區(qū)金礦物及標(biāo)型礦物進(jìn)行研究,為進(jìn)一步探討礦床成因、成礦形成溫度和指導(dǎo)找礦提供依據(jù)。通過前人資料和實(shí)驗(yàn)分析得出了以下一些認(rèn)識:老柞山金礦床位于黑龍江省雙鴨山市、七臺河市兩市和寶清縣的交界處。礦區(qū)出露的地層主要有古元古界興東群大馬河組(Pt1d)、中生界侏羅系上統(tǒng)(J3sh)及新生界第四系松散沉積層(Q4)。老柞山金礦的主要賦礦層位是興東群大馬河組(Pt1d)大理巖和大面積出露的混合巖。金礦田主要分為東礦帶、中礦帶和西礦帶。東礦帶分布在老柞山金礦區(qū)的北東部;中礦帶礦體分布于礦區(qū)中部;西礦帶礦體位于西南部。老柞山金礦礦區(qū)圍巖蝕變種類較多,主要有硅化、矽卡巖化、鉀化、碳酸鹽化、綠泥石化等。老柞山金礦床熱液作用分為早、晚兩個(gè)成礦期,早成礦期分為磁黃鐵礦-毒砂-方解石階段、膠狀黃鐵礦-白鐵礦-石英階段和粗粒毒砂-方解石-石英階段三個(gè)成礦階段,晚成礦期可分為純石英階段、粗粒毒砂-石英脈階段、細(xì)粒毒砂-多金屬硫化物-石英和方解石-石英階段四個(gè)成礦階段。礦石中自然金的顆粒粗粒不均,形態(tài)多為等軸狀,次為不規(guī)則狀,金呈明金的形式主要存在于毒砂、黃鐵礦中。實(shí)驗(yàn)結(jié)果表明金以包裹體金、粒間金形式賦存于毒砂、磁黃鐵礦等礦物中。通過對黃鐵礦、毒砂、磁黃鐵礦、黃銅礦和閃鋅礦進(jìn)行顯微鏡下觀察和電子探針分析可知,以上五種礦物金礦化比較普遍,均可作為載金礦物。部分標(biāo)型礦物主量元素和微量元素可以反映標(biāo)型礦物的成礦溫度,通過實(shí)驗(yàn)分析,該礦區(qū)成礦溫度可能形成中高溫和較深的環(huán)境下。
[Abstract]:Laozuoshan gold ore field is one of the important gold producing areas in Heilongjiang Province and the second largest rock gold deposit in the province. In this paper, through the collation and generalization of previous work and data, combined with field geological exploration and sample processing, gold deposits and standard minerals in the mining area are studied, which provides the basis for further discussion on the genesis of the deposit, the metallogenic temperature and the guidance for prospecting. Based on the previous data and experimental analysis, the following conclusions are obtained: Laozuoshan gold deposit is located at the junction of Shuangyashan City, Qitaihe City and Baoqing County, Heilongjiang Province. The strata exposed in the mining area are mainly composed of Pt1dU of the Dama River formation of the Xindong Group of the Paleoproterozoic, and J3sh of the Upper Jurassic of the Mesozoic, and the loose sedimentary bed Q4 of the Quaternary of the Cenozoic. The main ore-bearing strata of Laozuoshan gold deposit are marble of Damahe formation of Xingdong group and mixed rock of large area. The gold ore field is mainly divided into east ore belt, middle ore belt and west ore belt. The east ore belt is located in the north and east of Laozuoshan gold deposit, the middle ore belt is located in the middle of the mining area, and the west ore belt is located in the southwest. There are many kinds of alteration in the surrounding rock of Laozuoshan gold mine, such as silicification, skarn, potassium, carbonation, green mud and so on. The hydrothermal process of Laozuoshan gold deposit can be divided into early and late metallogenic periods, and the early metallogenic period is divided into three stages: pyrrhotite-arsenopyrite-calcite-quartz, colloidal pyrite-albite-quartz and coarse-grained arsenopyrite-calcite-quartz. The late metallogenic period can be divided into four stages: pure quartz stage, coarse arsenopyrite quartz vein stage, fine granulated arsenopyrite polymetallic sulphide quartz stage and calcite quartz stage. The coarse grain of natural gold in the ore is uneven, the shape is equiaxed and irregular, the form of gold is mainly in arsenopyrite and pyrite. The results show that gold occurs in the form of inclusions and intergranular gold in arsenopyrite, pyrrhotite and other minerals. Through the microscopic observation and electron probe analysis of pyrite, arsenopyrite, pyrrhotite, chalcopyrite and sphalerite, it can be seen that the gold mineralization of the above five minerals is quite common and can be used as gold carrier. The main elements and trace elements of some standard minerals can reflect the metallogenic temperature of the standard minerals. Through the experimental analysis, the ore-forming temperature of this ore area may be formed in a medium high temperature and deeper environment.
【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】：2017
【分類號】：P618.51
，

本文編號：2042206