【摘要】：云南西部三江地區(qū)處于歐亞特提斯造山帶東段向南東方向的轉(zhuǎn)折部位,是我國西部最具前景的資源富集區(qū)之一。其中金沙江-哀牢山構(gòu)造帶是我國新近崛起的大型金礦資源產(chǎn)地和重要的有色金屬和貴金屬成礦帶。該地區(qū)采金歷史久遠(yuǎn),有關(guān)金礦的專題研究工作始于上世紀(jì)50年代,80年代以后開展了較系統(tǒng)全面的工作,取得了一批重要研究成果。這些研究成果集中于古生代和中生代金沙江-哀牢山構(gòu)造帶地質(zhì)礦產(chǎn)特征的研究方面,對該構(gòu)造帶及周圍新生代的地質(zhì)特征和成礦作用涉及甚少。金沙江-哀牢山構(gòu)造帶是滇西重要的構(gòu)造帶和成礦帶之一。該帶已發(fā)現(xiàn)一批重要的銅、金礦床,從而構(gòu)成重要的銅、金成礦帶(李定謀等,2002)。與瀾滄江構(gòu)造帶、怒江構(gòu)造帶相比,金沙江-哀牢山構(gòu)造帶以其獨(dú)特的地質(zhì)構(gòu)造、多種成礦作用和獨(dú)特的人文、地理和豐富的生態(tài)景觀,令中外地質(zhì)學(xué)家所關(guān)注,成為青藏高原研究的熱點(diǎn)地區(qū)之一。本文研究工作中充分利用大龍?zhí)兜貐^(qū)近年來基礎(chǔ)地質(zhì)和礦產(chǎn)勘查工作所取得的新資料、新進(jìn)展,運(yùn)用相關(guān)學(xué)科的新知識(shí)、新技術(shù)、新方法,以大龍?zhí)督鸬V床為典型代表進(jìn)行剖析,對礦床、礦帶形成的地層、沉積特征和沉積相、地質(zhì)構(gòu)造、地球化學(xué)背景進(jìn)行綜合研究,建立成礦模型,然后對滇西地區(qū)新近系砂礫巖型金礦的成礦可能性進(jìn)行預(yù)測,預(yù)測同類型金礦的可能成礦區(qū)段。在野外考察、室內(nèi)測試分析、綜合研究的基礎(chǔ)上,本文取得以下主要認(rèn)識(shí):南華金礦的砂礫巖型金礦具有多期(多種)成礦作用疊加的特征。大龍?zhí)缎陆o(jì)沉積盆地的物源中具有提供金的來源的母巖。古砂金礦床受地層層位的嚴(yán)格控制。南華金礦的含礦層位為新近紀(jì)三營組上段。通過對云南西部的金物源區(qū)、地層層位、沉積盆地特征、沉積相和沉積微相以及沉積后的構(gòu)造活動(dòng)及蝕變作用的分析,認(rèn)為云南西部,尤其是金沙江-哀牢山構(gòu)造帶毗鄰地區(qū)新近系具有砂礫巖型金礦(大龍?zhí)缎徒鸬V)的成礦條件。
[Abstract]:The Sanjiang area in the west of Yunnan is located in the turning point of the eastern section of the Eurasian Tethys orogenic belt, and is one of the most promising resource rich areas in the western part of China. The Jinshajiang-Ailaoshan tectonic belt is a large gold resource area and an important metallogenic belt of non-ferrous metals and precious metals. There is a long history of gold mining in this area. The special research work on gold ore started in the 1950s. After the 1980s, more systematic and comprehensive work has been carried out, and some important research results have been obtained. These results are focused on the geological and mineral characteristics of the Paleozoic and Mesozoic Jinshajiang-Ailaoshan tectonic belt, with little attention to the geological characteristics and mineralization of the tectonic belt and its surrounding Cenozoic. Jinshajiang-Ailaoshan tectonic belt is one of the important tectonic zones and metallogenic zones in western Yunnan. A number of important copper and gold deposits have been found in this zone, which constitute important copper and gold metallogenic belts (Li Dingmou et al., 2002). Compared with the Lancang River structural belt and the Nujiang structural belt, the Jinsha-Ailaoshan tectonic belt has attracted the attention of Chinese and foreign geologists for its unique geological structure, various metallogenic processes and unique humanities, geography and rich ecological landscape. It has become one of the hot spots in the study of Qinghai-Xizang Plateau. This paper makes full use of the new data, new progress, new knowledge, new technology and new methods of the basic geology and mineral exploration in Dalong Tan area in recent years. Taking the Dalong Tan gold deposit as the typical representative, this paper makes a comprehensive study on the strata, sedimentary characteristics and sedimentary facies, geological structure and geochemical background of the deposit and ore belt, and establishes a metallogenic model. Then the metallogenic possibility of Neogene sandstone-type gold deposits in western Yunnan is predicted and the possible metallogenic segments of the same type gold deposits are predicted. On the basis of field investigation, laboratory test and comprehensive study, this paper has obtained the following main understanding: the gravel type gold deposit of Nanhua gold deposit has the characteristics of multi-stage (multiple) metallogenic superposition. The provenance of the Neogene sedimentary basin in Dalong Tan has a source of gold. The paleo-placer gold deposits are strictly controlled by the stratigraphic strata. The ore-bearing horizon of Nanhua gold deposit is the upper member of Sanying formation in Neogene. Based on the analysis of gold source area, stratigraphic location, sedimentary basin characteristics, sedimentary facies and sedimentary microfacies, post-sedimentary tectonic activity and alteration in western Yunnan, it is concluded that western Yunnan Province, Especially in the adjacent area of Jinshajiang-Ailaoshan structural belt, the Neogene has the metallogenic conditions of sandy gravel type gold deposit (Dalong Tan type gold deposit).
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.51

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 葛良勝,鄒依林,邢俊兵,王治華,郭曉東;滇西北與喜馬拉雅期富堿斑巖有關(guān)的金礦成礦系統(tǒng)[J];黃金地質(zhì);2004年01期

2 鹿化煜,安芷生;Paleoclimatic significance of grain size of loess-palaeosol deposit in Chinese Loess Plateau[J];Science in China(Series D:Earth Sciences);1998年06期

3 王國鵬,鄭浚茂,樊中海,楊道慶,邵先杰;泌陽凹陷安棚鼻狀構(gòu)造的沉積成因及裂縫分布[J];石油學(xué)報(bào);2005年02期

4 王振奇,侯國偉,張昌民,張尚鋒,樊中海,孫尚如,趙慶,王國鵬,付柘;趙凹油田安棚區(qū)深層系低滲致密砂巖儲(chǔ)層特征[J];石油與天然氣地質(zhì);2001年04期

5 許效松;尹福光;萬方;譚富文;;楚雄盆地性質(zhì)與沉積層序演化[J];巖相古地理;1999年05期

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本文編號(hào)：2310698