本文選題：金礦成因類型 + 成礦模式�。� 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：砂寶斯地區(qū)位于額爾古納地塊北東端,上黑龍江盆地的西部邊沿。本文以金作為預(yù)測(cè)礦種,選擇砂寶斯林場(chǎng)(N51E017008)、老溝林場(chǎng)(N51E017009)、東馬扎爾河(N51E018008)、哈卡魯查庫河(N51E018009)四幅1∶5萬地質(zhì)礦產(chǎn)調(diào)查區(qū)作為研究區(qū),通過資料收集整理、野外地質(zhì)調(diào)研、必要的測(cè)試分析和綜合研究,查明了區(qū)內(nèi)的成礦地質(zhì)條件、典型金礦床地質(zhì)特征及礦床成因等;利用物探、化探、遙感等方面的最新資料和成果,判斷與成礦密切相關(guān)的有利因素,建立成礦模型和預(yù)測(cè)模型;提取地質(zhì)、物探、化探及遙感等多方面信息,利用礦產(chǎn)資源GIS評(píng)價(jià)系統(tǒng)(MARS),開展綜合信息成礦預(yù)測(cè),圈定找礦遠(yuǎn)景區(qū)。砂寶斯、八里房、三十二站等代表性金礦床的研究發(fā)現(xiàn),區(qū)內(nèi)金礦體主要賦存于上侏羅統(tǒng)漠河組陸源碎屑巖中,受近SN、NNE向斷裂構(gòu)造控制,礦化類型以脈狀、細(xì)脈浸染狀為主,圍巖蝕變主要有硅化、黃鐵礦化、碳酸鹽化、絹云母化和粘土化。金屬硫化物組合為黃鐵礦、方鉛礦、毒砂、閃鋅礦、黃銅礦、磁黃鐵礦等,金礦物主要呈細(xì)小包裹金賦存于黃鐵礦顆粒之中。砂寶斯礦床流體包裹體顯微測(cè)溫和激光拉曼光譜分析表明,礦床形成于中溫、中鹽度、中淺成環(huán)境,成礦流體屬以巖漿水為主體、有大氣降水參與的H2O-NaCl-CO2-N2-CH4體系。綜合認(rèn)為,區(qū)內(nèi)以砂寶斯礦床為代表的已知金礦的成因類型為中溫?zé)嵋好}型。并在此基礎(chǔ)上,建立了成礦模式。基于礦床的基礎(chǔ)研究成果以及收集到的物探、化探、遙感資料進(jìn)行綜合分析,利用GIS系統(tǒng)對(duì)金礦床(點(diǎn))的分布進(jìn)行綜合疊加分析,判斷出研究區(qū)金礦床的控礦因素主要為上侏羅統(tǒng)漠河組和近SN、NNE、NW向斷裂構(gòu)造;找礦標(biāo)志主要有1∶5萬航磁△T值負(fù)異常、Au元素地球化學(xué)異常、Ag-As-Sb元素地球化學(xué)異常、遙感鐵染蝕變、遙感羥基蝕變。并建立了區(qū)內(nèi)金礦的預(yù)測(cè)模型。以中溫?zé)嵋好}型金礦為主攻礦床類型,運(yùn)用礦產(chǎn)資源評(píng)價(jià)系統(tǒng)(MRAS)開展了研究區(qū)的多元信息成礦預(yù)測(cè)工作。通過判斷并優(yōu)選預(yù)測(cè)要素、計(jì)算成礦后驗(yàn)概率以及找礦預(yù)測(cè)圖編制,圈定出金礦找礦遠(yuǎn)景區(qū)11個(gè),其中Ⅰ級(jí)遠(yuǎn)景區(qū)4個(gè),Ⅱ級(jí)遠(yuǎn)景區(qū)4個(gè),Ⅲ級(jí)遠(yuǎn)景區(qū)3個(gè),綜合地質(zhì)、物探、化探、遙感的預(yù)測(cè)信息對(duì)每個(gè)遠(yuǎn)景區(qū)的找礦遠(yuǎn)景進(jìn)行了評(píng)價(jià)。
[Abstract]:The Shabous area is located at the eastern end of the Erguna block and the western edge of the Upper Heilongjiang Basin. In this paper, four geological and mineral survey areas of 1: 50 000 were selected as the study area, using gold as the prediction mineral resources, and four geological and mineral survey areas N51E017008, N51E017009, N51E018008, N51E018008 and N51E018009, respectively, in Laogou Forest Farm. The necessary test analysis and comprehensive research have been carried out to find out the metallogenic geological conditions, geological characteristics and genesis of typical gold deposits in the area, and to utilize the latest data and achievements in geophysical prospecting, geochemical exploration, remote sensing, etc. To judge the favorable factors closely related to mineralization, to establish metallogenic model and forecast model, to extract geological, geophysical, geochemical and remote sensing information, and to carry out comprehensive information metallogenic prediction by using GIS evaluation system of mineral resources. Delineate the prospecting area. The study of representative gold deposits such as Shabaoshi, Balifang and 32 stations shows that the gold bodies in this area mainly occur in the continental clastic rocks of the Mohe formation of the Upper Jurassic, controlled by the NNE trending faults near SNN, and the mineralization types are mainly vein-like and vein-impregnated. The wall rock alteration mainly includes silicification, pyrite, carbonization, sericite and clay. The metal sulfides are composed of pyrite galena arsenopyrite sphalerite chalcopyrite pyrrhotite and so on. Microthermometry and laser Raman spectroscopy analysis of fluid inclusions in Shabors deposit indicate that the deposit was formed in a medium temperature, medium salinity and medium shallow environment. The ore-forming fluid belongs to a H2O-NaCl-CO2-N2-CH4 system with magmatic water as the main body and meteoric water as the main body. It is concluded that the known gold deposit represented by the Shabosi deposit in the region is of the mesothermal hydrothermal vein type. On this basis, the metallogenic model is established. Based on the basic research results of ore deposits and the collected geophysical, geochemical and remote sensing data for comprehensive analysis, the distribution of gold deposits (points) is analyzed by GIS system. The ore-controlling factors of the gold deposit in the study area are mainly the Mohe formation of Upper Jurassic and the NNENW trending fault structure, and the ore-prospecting markers are mainly the negative anomaly of the aeromagnetic T value of 1: 50 000 and the geochemical anomaly of Ag-As-Sb element. Remote sensing iron stain alteration, remote sensing hydroxyl alteration. The prediction model of gold deposit in this area is established. Taking the medium-temperature hydrothermal vein type gold deposit as the main deposit type, the multivariate information ore-forming prediction work in the study area was carried out by using the mineral resources evaluation system (MRASS). By judging and selecting predication elements, calculating the metallogenic posteriori probability and drawing up the ore-prospecting prediction map, 11 gold prospecting distant areas are delineated, of which 4 are grade 鈪，

本文編號(hào)：1866944