采礦專業(yè)外文翻譯---西昆侖地區(qū)卡蘭古mvt型鉛鋅礦床成礦作用和成礦物質(zhì)來源探討-資料下載頁
2025-05-11 15:11本頁面
【導讀】木板塊的交接部位[1],屬庫斯拉甫-他龍鉛鋅(銅)成礦帶的一部分。本區(qū)前震旦紀末期陸殼裂解形成塔里木板塊、西昆侖地體、帕米爾板塊等。于志留紀末期拼貼為一體[2]。加里東期花崗質(zhì)巖漿侵入時代的變化趨勢佐證了這一觀。晚古生代時受古特提斯裂解作用的影響,俯沖帶遷移到康西瓦斷裂帶附近,板塊。隨著古特提斯洋的消亡,庫斯拉甫-他龍晚古生代裂谷盆地于二疊。三疊紀時期本區(qū)處于隆起剝蝕狀態(tài),缺失沉積。侏羅紀為山間盆地相與間。至白堊紀末與早第三紀早期,因受新特提斯裂谷化作用遭受一次海侵,形。成一套淺海至湖相的沉積巖系。在喜馬拉雅期造山運動的作用下,新特提斯洋閉合,青藏。力克推覆體等構(gòu)造,奠定了現(xiàn)今的構(gòu)造格局。區(qū)內(nèi)構(gòu)造線總體為北西向,斷裂構(gòu)。造較發(fā)育,變形強烈,沿斷裂構(gòu)造帶往往發(fā)育動力變質(zhì)和構(gòu)造蝕變現(xiàn)象。礦化碳酸鹽巖中,白云石平均含量40%,最高可達60%;方解石一般為5%,呈角礫狀構(gòu)造,表明構(gòu)造運動直接控制礦化作用。研究,尚有較大的找礦空間存在。
【正文】 collapse breccia. Part of the ore was brecciated structure, indicating that the tectonic movement is directly controlled mineralization. (3) the Tamu mineralization geological conditions, the main mineralization characteristics and orecontrolling factors are very similar to the Mississippi Valleytype leadzinc [7,8] 4 lead, sulfur isotopes and rare earth elements analysis In this study, the Pb isotopic ratios (Table 5): 206PbP204 Pb ~ ,207 PbP204Pb the ~ ,208 PbP204Pb to to , value of to L value of to , for ThPU ~ , the calculated surface age of 461 to 481 Ma (Early Devonian 438 to 410mA). Indicating that the mineralization process into minerals may be derived from the former Devonian strata. TMB13, 5 and 11 three parties galena sulfur isotope test, , and (Yichang Institute of Geology Mineral Resources measured test accuracy ), and oilfield brines sulfur isotopic position similar, and organic sulfur, sulfate sulfur, there are significant differences, reflecting the oilfield brines and deep brine mixing characteristics. By the rare earth element analysis of data derived rock (ore) the Stone P chondritenormalized distribution mode (Figure 2) show that the rare earth content of the surrounding rock and ore is basically the same, with a weak negative Eu anomaly and significant negative Tm exception, the light rare earth elements relative to heavy rare earth enrichmentforming materials from the formation [10]. 5 Conclusion 7 (1) Tamu leadzinc deposits into mineral Pb, Zn es mainly from the former Devonian, Devonian Carboniferous strata only play the role of leadzinc mine host rocks. (2) The sulfur isotope position reflects the oilfield brines and deep brine mixed feature largescale hot brine migration, circulation, transformation, and has played an important role in the mineralization. The trace element geochemistry of ore and rock. (3) mine breccia and brecciated ore developed, indicating the direct control of the tectonic movement of mineralization. (4) Hercynian, the Himalayan region39。s two most important mineralization stages, Himalayan thrust nappe fold [11] The role led to a largescale the hot brine migration cycle, so as minerals can be precipitated mineralization in favorable host site. (5) dolomitization can be used as important prospecting the area one of the signs. Fold structure inconsistent with the direction of the regional structures should be noted that the increase prospecting efforts. (6) Tamu deposit deep edge, has not yet been engineering controls, the late tectonic broken ore mineralization has yet to be research, there is a large prospecting there is room.
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