额尔古纳地块新元古代—早古生代构造演化及块体属性：碎屑锆石U-Pb年代学与火成岩组合记录
发布时间：2018-08-13 16:03
【摘要】：本文以额尔古纳地块新元古代佳疙疸组和新元古代 早古生代侵入岩为研究对象,通过对变沉积岩和火山岩中碎屑锆石和岩浆锆石LA-ICP-MS和SIMS U-Pb年代学研究,确定了佳疙疸组的形成时代,并讨论了佳疙疸组中新元古代地层的沉积物源及其构造属性;通过对侵入岩中锆石LA-ICP-MS U-Pb定年,辅以榍石LA-ICP-MS U-Pb定年,确定了额尔古纳地块新元古代 早古生代岩浆事件的年代学格架,并基于全岩主、微量元素和Sr-Nd同位素以及锆石Hf同位素的地球化学研究,讨论了研究区新元古代 早古生代不同期次侵入岩的岩石组合和岩浆源区性质及其形成的构造背景。最终结合区域地质资料及前人研究成果,探讨了额尔古纳地块新元古代 早古生代区域构造演化历史及其块体属性。
[Abstract]:In this paper, the Neoproterozoic Jiagi formation and Neoproterozoic early Paleozoic intrusive rocks in the Erguna block were studied. The LA-ICP-MS and SIMS U-Pb chronology of detrital zircon and magmatic zircon from metamorphic sedimentary rocks and volcanic rocks were studied. The formation age of Jiakuni formation is determined, and the sediment source and tectonic attributes of Neoproterozoic strata in Jiakuangi formation are discussed. The zircon LA-ICP-MS U-Pb dating in intrusive rocks is supplemented by sphene LA-ICP-MS U-Pb dating. The chronological framework of Neoproterozoic early Paleozoic magmatic events in the Erguna massif has been determined, and geochemistry of the main rock, trace elements and Sr-Nd isotopes, as well as zircon HF isotopes has been studied. The rock assemblages and magmatic origin of Neoproterozoic early Paleozoic intrusive rocks and their tectonic setting are discussed. Finally, based on the regional geological data and previous research results, the history and block properties of the Neoproterozoic early Paleozoic regional tectonic evolution in the Erguna massif are discussed.
【学位授予单位】：吉林大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：P597.3;P588.1
，
本文编号：2181484
[Abstract]:In this paper, the Neoproterozoic Jiagi formation and Neoproterozoic early Paleozoic intrusive rocks in the Erguna block were studied. The LA-ICP-MS and SIMS U-Pb chronology of detrital zircon and magmatic zircon from metamorphic sedimentary rocks and volcanic rocks were studied. The formation age of Jiakuni formation is determined, and the sediment source and tectonic attributes of Neoproterozoic strata in Jiakuangi formation are discussed. The zircon LA-ICP-MS U-Pb dating in intrusive rocks is supplemented by sphene LA-ICP-MS U-Pb dating. The chronological framework of Neoproterozoic early Paleozoic magmatic events in the Erguna massif has been determined, and geochemistry of the main rock, trace elements and Sr-Nd isotopes, as well as zircon HF isotopes has been studied. The rock assemblages and magmatic origin of Neoproterozoic early Paleozoic intrusive rocks and their tectonic setting are discussed. Finally, based on the regional geological data and previous research results, the history and block properties of the Neoproterozoic early Paleozoic regional tectonic evolution in the Erguna massif are discussed.
【学位授予单位】：吉林大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：P597.3;P588.1
，
本文编号：2181484
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