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科学通报  2013 

苏鲁造山带的构造格局与演化:来自苏鲁超高压带浅变质岩的制约

DOI: 10.1360/972013-561, PP. 2338-2343

Keywords: 浅变质岩,新元古界,锆石年龄谱,大陆碰撞,苏鲁造山带

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Abstract:

苏鲁超高压带内部及其北缘广泛发育以绿片岩相为代表的新元古界浅变质岩系,如超高压带内部石桥浅变质岩,超高压带南部的海州群和超高压带北部的五莲群、蓬莱群以及鲁西地区的土门群等.其中五莲群和海州群具有扬子型新元古界岩石组合特征,以发育含磷、冰碛砾岩和双峰式火山岩为特征,碎屑锆石在这些地层中也记录了丰富的新元古代年龄信息;而鲁西土门群和胶北蓬莱群华北型新元古界在苏鲁地区以碎屑岩-碳酸盐岩为代表,其碎屑锆石在这些地层中记录了与华北基底变质岩相似的年代学信息.根据这些浅变质岩系的地质学和同位素年代学特征,我们对苏鲁造山带的构造格局,板块缝合线位置和大陆碰撞过程中的构造推覆提出了新的认识.

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