【摘要】：黃水塘地區(qū)區(qū)域構(gòu)造復(fù)雜,前人在該區(qū)域進行了大量的研究工作,對攀西裂谷的成因及構(gòu)造期次的推演有詳細敘述。然而,對于攀西裂谷的形成及消亡時代仍存在較大爭議。筆者試圖將黃水塘地區(qū)從復(fù)雜構(gòu)造史中剝離出來,重點闡述該區(qū)域內(nèi)構(gòu)造地質(zhì)形跡,對該時期的火山巖,沉積巖,變質(zhì)巖進行詳細解析,恢復(fù)該區(qū)域各期次構(gòu)造演化特征。本文依托于國家地質(zhì)調(diào)查局下屬項目,通過對巖石學(xué)、巖石地球化學(xué)、地質(zhì)年齡的研究,并收集前人的有關(guān)資料及成果,以咱里組、蘇雄組,峨眉山玄武巖組及同時代中元古代—三疊紀基性—酸性火山巖、超基性—酸性侵入巖為研究對象,通過對該區(qū)巖漿巖期次梳理,綜合厘定研究區(qū)巖漿巖序列及構(gòu)造巖漿演化,劃分呂梁-晉寧、澄江、華力西-印支3個構(gòu)造-巖漿旋回。古元古代火山巖賦存于咱里巖組中,分布上受區(qū)域構(gòu)造影響均位于安寧河斷裂帶西側(cè),主要分布于德昌縣鐵爐鄉(xiāng)財?shù)亓鹤右粠?在南華紀和三疊紀花崗巖中呈殘留體零星分散產(chǎn)出,巖石較為單一,主要為中粗粒斜長角閃巖。南華紀噴出巖主要賦存于蘇雄組。主要分布于安寧河斷裂帶以東螺髻山中部。巖石類型相對較單一。安寧河斷裂帶西側(cè)南華紀花崗巖體中見少量蘇雄組蝕變玄武巖分布。同期侵入巖分布于安寧河西岸,巖性類型較復(fù)雜,包括石英閃長巖、花崗閃長巖、二長花崗巖等。二疊紀基性巖分布于安寧河以西,沿安寧河斷裂帶西側(cè)呈零星小侵入體侵位于南華紀花崗巖體中,被三疊紀花崗巖侵吞破壞。綜合分析表明呂梁-晉寧期基性火山巖,以咱里巖組斜長角閃巖為研究對象,是在區(qū)域性匯聚構(gòu)造體制下的局部拉張環(huán)境下,由虧損地幔部分熔融形成的弱堿性—拉斑玄武巖漿噴發(fā)的產(chǎn)物。是洋陸碰撞島弧型火山作用構(gòu)造環(huán)境的產(chǎn)物。澄江期花崗巖主要應(yīng)是Rodinia超大陸裂解階段,幔源巖漿底侵/侵入導(dǎo)致地殼早存島弧巖漿巖重熔或殘留俯沖板片部分熔融形成的花崗質(zhì)巖漿上侵分異而成。二疊紀基性巖巖石地球化學(xué)特征與峨眉山玄武巖大同小異,屬大陸板內(nèi)環(huán)境產(chǎn)物,同產(chǎn)出花崗巖形成時代為三疊紀,是峨眉地幔柱活動幔源巖漿演化晚期的產(chǎn)物。
[Abstract]:The regional structure of the Huangshuitang area is complicated and the predecessors have done a lot of research work in this area. The origin of the Panxi rift and the derivation of the tectonic period are described in detail. However, there are still some controversies about the formation and extinction of Panxi rift. The author attempts to separate the Huangshuitang area from the complicated structural history, and to expound the tectonic geological features in the area, analyze the volcanic rocks, sedimentary rocks and metamorphic rocks in this period in detail, and restore the tectonic evolution characteristics of each stage in the area. This paper is based on a project under the National Geological Survey, through the study of petrology, geochemistry, geological age, and the collection of relevant information and achievements of the predecessors, to the Zanli formation, the Suxiong formation, Emeishan basalt formation and Mesoproterozoic Triassic basic-acid volcanic rocks and ultrabasic-acid intrusive rocks are studied. The magmatic sequence and tectonic magma evolution in the study area are comprehensively determined by sorting out the magmatic stages in the study area. Lv Liang-Jinning, Chengjiang, Huaxi-Indosinian 3 tectonic-magmatic cycle. Paleoproterozoic volcanic rocks occurred in Zanliyan formation. The distribution of volcanic rocks is located on the west side of the Anning River fault zone, mainly in the area of Cailiangzi, Tielou Township, Dechang County. In the South China and Triassic granites, the residual bodies are scattered and scattered, and the rocks are relatively single, mainly composed of medium-coarse amphibolite. The South China exhalation rocks mainly occurred in Suxiong formation. Mainly distributed in the middle of Luoji Mountain east of the Anning River fault zone. The rock type is relatively single. A small amount of altered basalts of Suxiong formation are found in the South China granitic body on the west side of the Anning River fault zone. The intrusive rocks are distributed in the west bank of Anning River, and their lithologic types are complicated, including quartz diorite, granodiorite, monzogranite, etc. The Permian basic rocks distributed to the west of Anning River, and the west side of the Anning River fault zone was intruded into the South China granitic body, which was misappropriated and destroyed by Triassic granite. The comprehensive analysis shows that the basic volcanic rocks of Lv Liang and Jinning period, taking the amphibolite of Zanliyan formation as the research object, are in the local extensional environment under the regional convergent tectonic system. The product of magmatic eruption of weak alkalinity-lacquer Black Tortoise formed by partial melting of depleted mantle. It is the product of the tectonic environment of oceanic collision island arc volcanism. The Chengjiang granites are mainly composed of Rodinia supercontinent pyrolysis stage, and the granitic magma transgression and differentiation of mantle derived magma underthrust / intrusions lead to the remelting of island arc magmatic rocks or partial melting of residual subduction plates in the crust. The petrogeochemical characteristics of Permian basic rocks are similar to those of Emeishan basalt and belong to the products of continental intraplate environment. The syntectogenic granites were formed in Triassic and were the products of the late evolution of mantle magma derived from the Emei mantle plume.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P588.11

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