本文選題：廣子田鈾礦床 + 礦物學特征��； 參考：《東華理工大學》2017年碩士論文

【摘要】：廣子田鈾礦床是在1972年被廣西三一0核地質大隊于發(fā)現的,1972-1992年在全長4.5km的范圍內共投入鉆探工作量125198.60m、坑探工作量2362.97m,1994年12月提交了《廣西全州縣廣子田鈾礦床詳查報告》,礦床規(guī)模為中型,礦床類型為碳酸鹽巖型。2006年10月—2011年11月,廣西三一0核地質大隊又完成鉆探工作量18170.98m,將廣子田鈾礦床規(guī)模擴大為大型。礦床礦體的產狀與空間形態(tài)嚴格受構造帶控制,主要賦存在F1層間破碎帶及其上下盤次級帶中;主要礦體呈層狀,小礦體大部分呈透鏡狀。礦體的最高控制標高400m,最低控制標高-640m,礦化垂幅達1000 m。資源量核實范圍內地質工作程度達到了詳查程度以上,礦床屬大型規(guī)模、中等品位的碳酸巖型復成因鈾礦床。經可行性研究發(fā)現礦區(qū)開發(fā)內外部條件良好,礦床開發(fā)利用在技術、經濟上可行,開發(fā)經濟效益良好。廣子田礦床位于全州縣城334°方向25Km處廣子塘村及其附近,隸屬全州縣大西江鎮(zhèn)、龍水鎮(zhèn)管轄。通過現代技術測試實驗對廣子田礦床礦石進行分析研究,從而查明礦石的工藝礦物學特征及鈾的存在形式并探討礦床成礦機制,得出主要結論如下:(1)礦區(qū)處于越城嶺斷褶帶東緣,礦區(qū)西部大面積出露為加里東期花崗巖和燕山期花崗巖。礦床位于越城嶺東面大西江—龍水向斜盆地西翼。Fl斷裂帶是整裝勘查區(qū)內的主要含礦構造。(2)礦石類型及礦物組分按含礦巖性的特征將礦石分為三種自然類型,分別是破碎白云巖型、構造泥型和破碎泥質粉砂巖型。(1)破碎白云巖礦石:因赤鐵礦、炭質含量的差別,呈現不同的顏色,主要有灰白色、灰黑色、磚紅色等。礦石中網脈狀裂隙發(fā)育,擦痕、石墨化鏡面多見,鈾主要以瀝青鈾礦存在,呈細脈狀,與鈾礦物共生的金屬礦物有黃鐵礦、赤鐵礦、褐鐵礦等。(2)構造泥礦石:礦石呈青灰色、灰綠色、豬肝色及其他雜色。鈾在構造泥礦石中主要以分散吸附狀態(tài)存在。(3)破碎泥質粉砂巖礦石:產于F1主帶下部,礦石呈青灰色-灰綠色,具碎斑結構。鈾主要以瀝青鈾礦、鈾黑存在,與鈾礦物共生的金屬礦物有黃鐵礦、赤鐵礦、褐鐵礦等。(3)廣子田碳硅泥巖型鈾礦床大部分為多源、多期、多成因的鈾礦床,且以熱液(熱水)改造成因為主,疊加沉淀富集而成礦。(4)根據研究總結,廣子田礦床形成主要經歷:(1)沉積成巖時鈾預富集;(2)后期地質作用形成運移通道和儲鈾空間;(3)熱液疊加改造成礦。
[Abstract]:The Guang Zidan uranium deposit was discovered by Guangxi S310 nuclear geological team in 1972. The total amount of drilling work was 125198.60m and the pit exploration work was 2362.97m. the detailed investigation of Guang Zi Tian uranium deposit in Guanzhou County, Guangxi was submitted in December 1994. The scale of the deposit is medium, The deposit type is carbonate rock type. From October 2006 to November 2011, Guangxi Sany 10 nuclear geological team completed the drilling work of 18170.98 m, which enlarged the size of the Guangzidan uranium deposit to a large scale. The occurrence and spatial morphology of ore bodies are strictly controlled by tectonic belts, which mainly occur in the F _ 1 interlayer fracture zone and its upper and lower subzones, and the main orebodies are layered, and the small ones are mostly lenticular. The highest controlled elevation of orebody is 400m, the lowest controlled elevation is -640m, and the vertical range of mineralization is 1000 mm. The degree of geological work within the scope of resources verification is above the level of detailed investigation, and the deposit belongs to a large scale and medium grade carbonate type complex uranium deposit. Through the feasibility study, it is found that the internal and external conditions of mining area development are good, the exploitation and utilization of ore deposits are technically feasible and economically feasible, and the economic benefits of exploitation are good. The Guangzitian deposit is located in Guangzitang Village and its vicinity in the city of Quanzhou County at the direction of 334 擄25km. It is under the jurisdiction of Daxijiang Town and Longshui Town in Quanzhou County. The ore of Guangzidan deposit is analyzed and studied by means of modern technical test experiments, so as to find out the technological mineralogical characteristics of ore and the existence form of uranium, and to probe into the metallogenic mechanism of the deposit. The main conclusions are as follows: (1) the ore area is located in the eastern margin of the Yuechengling fault fold belt and the western part of the mining area is exposed to Caledonian and Yanshanian granites. The fault zone of the west wing of the Daxijiang-Longshui syncline basin is the main ore-bearing structure in the whole exploration area. (2) the ore types and mineral components are divided into three natural types according to the characteristics of ore-bearing rocks. (1) broken dolomite ore: due to the difference of hematite and carbonaceous content, it presents different colors, such as gray and white, gray and black, brick red and so on. The network vein fissures, scratches, graphitization specular surface are often seen in the ore. Uranium mainly exists in asphaltene uranium deposit, and it is veinlike. The metal minerals symbiosis with uranium ore include pyrite, hematite, limonite, etc. (2) structural mud ore: the ore is bluish gray. Grayish green, pig liver and other miscellaneous colors. Uranium mainly exists in the structural mud ore in the form of dispersion adsorption. (3) the crushed muddy siltstone ore, occurring in the lower part of F1 main belt, is turquoise grayish green and has a patchy structure. Uranium mainly exists in asphaltene uranium deposits and uranium black. The metal minerals associated with uranium deposits include pyrite, hematite, limonite and so on. (3) most of the carbon-siliceous mudstone type uranium deposits in Guangzidan are multi-source, multi-period and multi-genetic uranium deposits. And the hydrothermal solution (hot water) was transformed into ore-forming because of the main, superimposed precipitation and enriched. (4) according to the research summary, The main formation experiences of the Guangzidan deposit are as follows: (1) uranium preenrichment during sedimentary diagenesis; (2) late geological processes forming migration channels and uranium storage spaces; (3) hydrothermal superposition transformation to mineralization.
【學位授予單位】：東華理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P619.14

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1 唐斌;廣子田礦床鈾礦化與礦物學特征及成礦機制探討[D];東華理工大學;2017年

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本文編號：2052596