本文選題：中咱地塊 + 中酸性巖漿巖�。� 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：研究發(fā)現(xiàn)中咱地塊是在晚古生代時(shí)期從揚(yáng)子陸塊西緣裂解而形成,同時(shí)伴隨甘孜—理塘洋盆的逐漸發(fā)育;并在晚三疊世中期(227Ma)甘孜-理塘洋開始閉合,逐漸向中咱地塊之下俯沖消減,形成中咱地塊與甘孜—理塘縫合帶之間的義敦島弧褶皺帶。甘孜—理塘洋盆向西俯沖消減于中咱地塊的過(guò)程中,必然導(dǎo)致中咱地塊發(fā)生相應(yīng)的巖漿活動(dòng)與之響應(yīng)。本文選取中咱地塊內(nèi)的黃草坪黑云母閃長(zhǎng)巖巖體、扎瓦拉復(fù)式巖體、亞日貢石英二長(zhǎng)巖巖體、納交系花崗巖巖體四個(gè)代表性的花崗質(zhì)巖體進(jìn)行詳細(xì)的巖相學(xué)、巖石地球化學(xué)、LA-ICPMS U-Pb年代學(xué)研究。研究結(jié)果顯示這些花崗質(zhì)巖石為俯沖島弧環(huán)境下形成的高鉀鈣堿性I型花崗巖,并且主要屬于鈦鐵礦系列的還原型花崗質(zhì)巖體;成巖年齡分別為:黃草坪黑云母閃長(zhǎng)巖巖體—227.4±1.8 Ma;扎瓦拉石英二長(zhǎng)巖巖體—225.15±0.96Ma,扎瓦拉鉀長(zhǎng)花崗巖巖體—218.0±1.1 Ma;亞日貢石英二長(zhǎng)巖巖體—224.94±0.93Ma;納交系花崗巖巖體—222.6±2.5Ma。本文所研究的四個(gè)花崗質(zhì)巖體基本相同的成巖年齡預(yù)示甘孜—理塘洋盆很可能在晚三疊世早期之前(227Ma)便開始向西俯沖消減于中咱地塊之下,從而引發(fā)了中咱地塊內(nèi)218~227Ma左右的花崗質(zhì)巖漿活動(dòng)。研究表明中咱地塊巖漿巖與義敦島弧帶巖漿巖的形成時(shí)代和環(huán)境基本一致,都屬于印支期花崗巖,并且通過(guò)對(duì)中咱地塊內(nèi)扎瓦拉銅金多金屬礦床的研究表明,中咱地塊與巖漿巖活動(dòng)有關(guān)的礦床,其形成是在中咱地塊從揚(yáng)子地臺(tái)分離以后,因此中咱地塊內(nèi)的找礦思路可以參照義敦島弧帶的找礦模式。
[Abstract]:It is found that the Zhongzan block was formed during the late Paleozoic from the western margin of the Yangtze block with the gradual development of the Ganzi-Litang ocean basin, and began to close in the middle of the late Triassic. It gradually subducts and subducts under the Zhongzan massif to form the Yidun island arc fold zone between the Zhongzan massif and the Ganzi-Litang suture belt. The process of subducting and subducting westward from Ganzi-Litang oceanic basin to Zhongzan block will inevitably lead to the corresponding magmatic activity and response of Zhongzan block. In this paper, four representative granitic rocks, including Huangzhuangbiotite diorite, Zawala complex, Yarigon quartz monzonite, Nanaoguitic granitoids, are selected for detailed petrographic study. A geochemistry study of LA-ICPMS U-Pb chronology. The results show that these granitic rocks are high-potassium calc-alkaline I-type granites formed in the subducted island arc environment, and mainly belong to the reduced granitic rocks of ilmenite series. The diagenetic ages are: Huangzhang biotite diorite rock body -227.4 鹵1.8 Ma-225.15 鹵0.96 Ma, zawala potassium feldspar granitic body -218.0 鹵1.1 Ma. Yarigon quartz monosite rock body -224.94 鹵0.93Ma. The diagenetic ages of the four granitic rocks studied in this paper indicate that the Ganzi-Litang ocean basin probably began to submerge westward under the Zhongzan block before the early late Triassic. Thus, the granitic magmatism of 218m 227Ma in Zhongzan block was initiated. The results show that the magmatic rocks of the Zhongzan block and the Yidun island arc belt are formed in the same age and environment and belong to the Indosinian granites. The study on the Zawala copper and gold polymetallic deposits in the Zhongzan massif shows that the formation time and environment of the magmatic rocks are basically the same as those in the Yidun island arc belt. The ore deposits related to magmatic activities in the Zhongzan massif were formed after the Zhongzan massif was separated from the Yangtze platform, so the prospecting ideas in the Zhongzan massif can refer to the prospecting model of the Yidun island arc belt.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P597.3;P588.12

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 宋昊;張成江;黃小東;李家慶;陳實(shí)識(shí);;川西地區(qū)Cu-Au礦床成礦規(guī)律研究——以鄉(xiāng)城—稻城—得榮等地區(qū)為例[J];礦物學(xué)報(bào);2009年S1期

2 侯可軍;李延河;田有榮;;LA-MC-ICP-MS鋯石微區(qū)原位U-Pb定年技術(shù)[J];礦床地質(zhì);2009年04期

3 侯可軍;李延河;鄒天人;曲曉明;石玉若;謝桂青;;LA-MC-ICP-MS鋯石Hf同位素的分析方法及地質(zhì)應(yīng)用[J];巖石學(xué)報(bào);2007年10期

4 李文昌;曾普勝;;云南普朗超大型斑巖銅礦特征及成礦模型[J];成都理工大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年04期

5 黎彤;化學(xué)元素的地球豐度[J];地球化學(xué);1976年03期

相關(guān)博士學(xué)位論文 前2條

1 鐘文麗;三江成礦帶中段中咱—得榮地區(qū)銅多金屬礦成礦規(guī)律研究[D];成都理工大學(xué);2012年

2 李文昌;義敦島弧構(gòu)造演化與普朗超大型斑巖銅礦成礦模型[D];中國(guó)地質(zhì)大學(xué)（北京）;2007年

，

本文編號(hào)：2004761