本文選題：片麻巖穹隆 + 花崗片麻巖�。� 參考：《地球?qū)W報(bào)》2017年05期

【摘要】：錯(cuò)那洞片麻巖穹隆位于特提斯喜馬拉雅南側(cè),靠近藏南拆離系,是北喜馬拉雅片麻巖穹隆帶(NHGD)中最新發(fā)現(xiàn)的新成員。本文在詳實(shí)的野外地質(zhì)調(diào)查基礎(chǔ)上,首次全面介紹了錯(cuò)那洞片麻巖穹隆的結(jié)構(gòu)組成,同時(shí)進(jìn)行了片麻巖的年代學(xué)研究。結(jié)果表明,錯(cuò)那洞片麻巖穹隆由核-幔-邊三部分組成,核部由花崗片麻巖及淡色花崗巖組成,并可見(jiàn)大量偉晶巖脈穿插;幔部為一套強(qiáng)變質(zhì)變形的二云母片巖,從內(nèi)至外具有夕線石+石榴石→藍(lán)晶石+石榴石→十字石+石榴石→石榴石+十字石+堇青石→堇青石+石榴石的變質(zhì)分帶特征;邊部主要為淺變質(zhì)沉積巖系,可見(jiàn)較多因穹隆隆升而形成的A型褶皺�；◢徠閹rLA-ICP-MS鋯石U-Pb年齡為(499.7±3.4)Ma(MSWD=0.025),與NHGD其它穹隆核部片麻巖時(shí)代基本一致,均為泛非—早古生代造山活動(dòng)的產(chǎn)物。在本次野外地質(zhì)調(diào)查過(guò)程中,在錯(cuò)那洞片麻巖穹隆中發(fā)現(xiàn)了矽卡巖型鎢錫鈹工業(yè)礦體以及銅金礦化體,同時(shí)在偉晶巖中還存在著大量的綠柱石等寶石礦產(chǎn),這樣的成礦作用與礦化組合在NHGD中尚屬首次發(fā)現(xiàn),基于此本文提出了北喜馬拉雅片麻巖穹隆控礦新命題。
[Abstract]:The Dinaodong gneiss dome, located in the south of Tethys Himalaya, is a newly discovered member of the Northern Himalayan Gneiss Dome (NHGD). On the basis of detailed field geological survey, the structural composition of the dome of the gneiss in Dina cave is introduced for the first time, and the geochronology of the gneiss is also studied. The results show that the dome is composed of three parts: core, mantle and edge, the core is composed of granitic gneiss and pale granite, and a large number of pegmatite veins can be seen in the dome, and the mantle is a set of strongly metamorphic dimica schist. It has the metamorphic zonation characteristics from the inside to the outside of the sillimanite garnet, cordierite, and cordierite garnet. It can be seen that more A-type folds formed by dome uplift. The LA-ICP-MS zircon U-Pb age of the granitic gneiss is 499.7 鹵3.4 Ma-MSWDU 0.025, which is basically consistent with the gneiss age of the other dome of NHGD, and is the product of the Pan-African early Paleozoic orogenic activity. In the course of this field geological survey, skarn type tungsten, tin, beryllium industrial ore bodies and copper-gold mineralization bodies were found in the dome of the gneiss in Dhonaodong, and there are also a large number of gemstone minerals such as Beryl in pegmatite. This combination of mineralization and mineralization is first discovered in NHGD. Based on this, a new proposition of controlling ore deposits in the dome of the northern Himalayan gneiss is proposed.
【作者單位】： 中國(guó)地質(zhì)調(diào)查局成都地質(zhì)調(diào)查中心;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃深地資源開(kāi)采項(xiàng)目(編號(hào):2016YFC0600308) 中國(guó)地質(zhì)調(diào)查局地質(zhì)調(diào)查項(xiàng)目(編號(hào):DD20160015)聯(lián)合資助~~
【分類號(hào)】：P588.345;P612

【相似文獻(xiàn)】

相關(guān)期刊論文 前6條

1 胡明城;國(guó)際地學(xué)界對(duì)喜馬拉雅-喀喇昆倫-青藏地區(qū)的研究[J];測(cè)繪科技動(dòng)態(tài);1997年01期

2 董泰;美國(guó)研究人員預(yù)言:喜馬拉雅山脈可能發(fā)生大地震[J];國(guó)際地震動(dòng)態(tài);2002年01期

3 張之孟;;喜馬拉雅構(gòu)造[J];青藏高原地質(zhì)文集;1982年03期

4 陳國(guó)達(dá);南喜馬拉雅地洼區(qū)[J];大地構(gòu)造與成礦學(xué);1985年01期

5 ;高喜馬拉雅板塊的槽流和韌性噴出:以錫金喜馬拉雅Kangchenjunga-Darjeeling剖面為例[J];沉積與特提斯地質(zhì);2006年01期

6 朱偉元;喜馬拉雅東端基底巖系及其建造特征[J];甘肅地質(zhì)學(xué)報(bào);1996年02期

相關(guān)會(huì)議論文 前1條

1 張之孟;;喜馬拉雅構(gòu)造[A];青藏高原地質(zhì)文集（1）——構(gòu)造地質(zhì)·地質(zhì)力學(xué)[C];1979年

，

本文編號(hào)：1924024