科研之友
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摘要
<正>1. Objective The Bainaimiao Arc Belt (BAB), one of the most important units of the southeastern Central Asian Orogenic Belt (CAOB), locates along the northern margin of the North China Craton (NCC). There is a lack of understanding on the existence, scale, and affinity of the crystalline basement of the BAB. Based on the recent geochronologic studies, most of the so-called Proterozoic metamorphic rocks (for example,
