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本文对清水泉复式杂岩体进行SHRIMP锆石U-Pb测年,获得二长花岗岩形成时代为314.4±4.7 Ma,含黑云母花岗岩形成时代为311.7±4.1 Ma,英云闪长岩形成时代为314.0±4.0 Ma,加之前人在该地区花岗闪长岩中获得Rb-Sr全岩等时线年龄(277.71±13.5 Ma),限定清水泉复式杂岩体的主要侵位时代为晚石炭世至早二叠世,且至少存在两期岩浆;清水泉复式杂岩体微量元素与稀土元素特征表明岩体具有地壳重熔型花岗岩特征,为I型与A型过渡岩浆,形成于活动陆缘的后造山/火山弧环境,从而揭示在晚石炭世时,古红石山洋消减碰撞,之后进入后造山阶段。
In this paper, SHRIMP zircon U-Pb dating of Qingshuiquan complex complex body is obtained, with the age of 314.4 ± 4.7 Ma, the formation age of biotite granite as 311.7 ± 4.1 Ma, the age of formation of the English-type diorite as 314.0 ± 4.0 Ma. In addition, the previous Rb-Sr whole-rock isochron age (277.71 ± 13.5 Ma) was obtained from granodiorite in this area, and the main emplacement period of Qingshuiquan complex complex is Late Carboniferous To Early Permian with at least two stages of magma. The trace elements and rare earth elements of Qingshuiquan complex complex indicate that the crust is characterized by crustal remelting granite, which is type I and type A transitional magma formed in the active margin Of the post-orogenic / volcanic arc environment, thus revealing the late Carboniferous, the ancient Redstone ocean collision reduction, and then into the post-orogenic phase.