本文選題：流體包裹體 + 元素地球化學(xué)　； 參考：《廣西大學(xué)》2015年碩士論文

【摘要】：箭豬坡鉛鋅銻多金屬礦床是丹池成礦帶南東段五圩礦田中規(guī)模最大、特征最為典型的一個(gè)大型礦床,區(qū)內(nèi)成礦方式以充填為主,礦體主要呈陡立脈狀產(chǎn)出,產(chǎn)狀和形態(tài)嚴(yán)格受NNW向斷裂控制。此外,本次調(diào)查還新發(fā)現(xiàn)有緩傾斜似層狀礦體。本文在對(duì)箭豬坡礦床構(gòu)造特征、礦化特征等研究的基礎(chǔ)上,重點(diǎn)開(kāi)展了箭豬坡礦床7號(hào)、59號(hào)主礦脈以及新發(fā)現(xiàn)似層狀礦體流體包裹體研究,最后提出了找礦方向,圈定了找礦靶區(qū)。取得的主要成果和認(rèn)識(shí)如下：(1)箭豬坡礦區(qū)主要構(gòu)造為NNW向五圩背斜和NNW向斷裂。五圩背斜由兩個(gè)次級(jí)背斜組成,沿軸向具“S型”拐彎特點(diǎn)；NNW向斷裂是區(qū)內(nèi)脈狀礦體的主要控礦構(gòu)造,沿走向具“S型”拐彎特點(diǎn),經(jīng)歷了成礦前以擠壓為主、兼具順時(shí)針扭動(dòng)和成礦期以拉張為主、兼具反時(shí)針扭動(dòng)兩期構(gòu)造活動(dòng)。成礦期構(gòu)造運(yùn)動(dòng)特點(diǎn)導(dǎo)致的構(gòu)造拐彎部位對(duì)成礦有利。(2)根據(jù)野外觀察和室內(nèi)礦相學(xué)研究,將箭豬坡礦床的成礦作用分為三個(gè)階段：第Ⅰ階段為黃鐵礦-石英階段,該階段礦化較弱,金屬礦物以黃鐵礦為主,偶見(jiàn)有方鉛礦；第Ⅱ階段為鐵閃鋅礦-黃鐵礦-輝銻礦-脆硫銻鉛礦-石英-方解石-白云石階段,該階段為主成礦階段,出現(xiàn)大量深棕色鐵閃鋅礦、放射狀的脆硫銻鉛礦、輝銻礦以及少量的黃鐵礦；第Ⅲ階段為石英-方解石階段,石英-方解石脈中含有少量輝銻礦、脆硫銻鉛礦、鐵閃鋅礦及黃鐵礦等金屬礦物。(3)箭豬坡礦床主成礦階段流體包裹體類(lèi)型主要有H2O-NaCl-CO2型、H2O-NaCl型和純C02型等,成礦流體主要表現(xiàn)為中溫、低鹽度、富C02等特征。H2O-NaCl型包裹體完全均一溫度為113-288℃、鹽度w(NaCl)為3.53～8.27%、密度為0.799～0.996 g/cm3；H2O-NaCl-CO2型包裹體完全均一溫度為175～328℃、鹽度w(NaCl)為0.21～11.84%、密度為0.654～0.842g/cm3。出箭豬坡礦床成礦壓力主要變化范圍為70～90MPa,成礦深度主要為1.75～3.77 km。(4)成礦流體溫度、鹽度以及成礦元素的空間分布特征,提出箭豬坡礦床中部(302～304勘探線(xiàn)之間)為成礦中心所在部位。(5)依據(jù)礦脈空間產(chǎn)出特征,結(jié)合成礦期共軛節(jié)理交線(xiàn)產(chǎn)狀、成礦期構(gòu)造運(yùn)動(dòng)特征等綜合判斷,箭豬坡礦區(qū)礦液由北向南,由深到淺運(yùn)移,礦體向NE側(cè)伏。(6)依據(jù)本次研究認(rèn)識(shí),提出礦區(qū)中部(五圩背斜拐彎處)以及已知礦脈北部東側(cè)為區(qū)內(nèi)的兩個(gè)找礦靶區(qū)。
[Abstract]:The Qianliupo lead-zinc antimony polymetallic deposit is the largest and most typical large deposit in Wuwei ore field in the south eastern section of the Danchi metallogenic belt. The ore-forming mode in the area is mainly filled, and the orebody mainly occurs in steep veins. The occurrence and morphology are strictly controlled by NNW trending faults. In addition, the investigation also found a gently inclined bedded ore body. Based on the study of the structural and mineralized characteristics of the Qianliupo deposit, this paper focuses on the study of the main vein No. 7 and No. 59 of the Qianzhoupo deposit and the fluid inclusions of the newly discovered stratiform orebody, and finally puts forward the prospecting direction. The prospecting target area has been delineated. The main achievements and understandings are as follows: 1) the main structures of Qianzhubo mining area are NNW Wuwei anticline and NNW trending faults. Wuxu anticline is composed of two secondary anticlines. The NNW fault is the main ore-controlling structure of the vein orebody along the axial direction with "S-type" bend characteristics. Both clockwise writhing and metallogenic stage are mainly extensional and counterclockwise twisting tectonic activity. On the basis of field observation and indoor mineralogical study, the mineralization of Qianzhoupo deposit is divided into three stages: the first stage is the stage of pyrite-quartz, and the other is the stage of pyrite-quartz. The mineralization in this stage is relatively weak, with pyrite as the main mineral and galena occasionally found in the metal minerals, and in the second stage is the stage of marmatite, pyrite, stibnite, brittle antimony, quartz, calcite and dolomite, and the main metallogenic stage is this stage, which is mainly composed of sphalerite, pyrite, stibnite, quartz, calcite and dolomite. A large number of dark brown marmatite, radial brittle antimony lead, stibnite and a small amount of pyrite; the third stage is the quartz-calcite stage, the quartz-calcite vein contains a small amount of stibnite, brittle antimony lead, The fluid inclusions in the main metallogenic stage of Qianzhupo deposit are mainly composed of H _ 2O -NaCl-CO _ 2 type and pure type C _ (02). The ore-forming fluids are mainly of moderate temperature and low salinity. The complete homogenization temperature of the inclusions is 113-288 鈩，

本文編號(hào)：2002403