宋明春, 赵庆龄. 2004: 山东省日照市官山闪长玢岩锆石SHRIMP年龄:印支期岩浆热事件及其对超高压变质岩折返历史的限定. 地质通报, 23(12): 1254-1258.
    引用本文: 宋明春, 赵庆龄. 2004: 山东省日照市官山闪长玢岩锆石SHRIMP年龄:印支期岩浆热事件及其对超高压变质岩折返历史的限定. 地质通报, 23(12): 1254-1258.
    SONG Mingchun, ZHAO Qingling. 2004: Zircon SHRIMP U-Pb dating of the Guanshan diorite-porphyrite,Rizhao, Shandong: Indosinian magmato-thermal event and its constraints on the exhumation history of UHP metamorphic rocks. Geological Bulletin of China, 23(12): 1254-1258.
    Citation: SONG Mingchun, ZHAO Qingling. 2004: Zircon SHRIMP U-Pb dating of the Guanshan diorite-porphyrite,Rizhao, Shandong: Indosinian magmato-thermal event and its constraints on the exhumation history of UHP metamorphic rocks. Geological Bulletin of China, 23(12): 1254-1258.

    山东省日照市官山闪长玢岩锆石SHRIMP年龄:印支期岩浆热事件及其对超高压变质岩折返历史的限定

    Zircon SHRIMP U-Pb dating of the Guanshan diorite-porphyrite,Rizhao, Shandong: Indosinian magmato-thermal event and its constraints on the exhumation history of UHP metamorphic rocks

    • 摘要: 对苏鲁超高压变质带日照官山地区侵入于榴辉岩中的原生块状闪长玢岩进行了锆石SHRIMP年龄分析。结果显示,数据点构成的不一致线与一致线上交点年龄为(876±62)Ma,下交点年龄为(201±20)Ma。上交点年龄为残余锆石年龄,下交点年龄大致代表了闪长玢岩的形成时代。苏鲁超高压变质带中存在较广泛的印支期岩浆热事件。假定超高压变质作用发生于228Ma,推算出闪长玢岩侵位前超高压变质岩的折返速率大致为3.63mm/a,闪长玢岩侵位后超高压变质岩的折返(剥蚀)速率大致为0.03mm/a。

       

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