Blueschists and Eclogites of the World and Their Exhumation
Blueschists and Eclogites of the World and Their Exhumation
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DOI：
10.1080/00206819709465347
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发表时间：
1996-06
影响因子：
2.6
通讯作者：
S. Maruyama;J. Liou;M. Terabayashi
中科院分区：
文献类型：
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作者：
S. Maruyama;J. Liou;M. Terabayashi
高P/T变质带按原岩类型分为A型和B型。A型（碰撞型）蓝片岩具有被动边缘原岩，其特征为台地型碳酸盐岩、双峰式火山岩和过铝质沉积物。B型（科迪勒拉型）蓝片岩由增生杂岩中的活动大陆边缘原岩组成，其特征为层状硅质岩、MORB和洋岛玄武岩、礁灰岩和杂砂岩。整理了世界蓝片岩和榴辉岩的时空分布，在已确认的250条高P/T带中，约20%属于A型，其余为B型。大多数A型带位于欧洲和特提斯域，包括超高压变质火山岩，变质压力高达45 kbar。B型带主要出现在环太平洋造山带和亚洲陆内造山带中，在P <12 kbar时重结晶。伴生橄榄岩包括A型石榴橄榄岩和强蛇纹橄榄岩。
High-P/T metamorphic belts were classified into types A and B according to their protoliths. The A-type (collision-type) blueschists possess passive-margin protoliths characterized by platform-type carbonates, bimodal volcanics, and peraluminous sediments. B-type (Cordilleran-type) blueschists consist of active continental-margin protoliths in an accretionary complex characterized by bedded chert, MORB and ocean-island basalts, reef limestones, and graywackes. The spatiotemporal distribution of blueschists and eclogites of the world was compiled; among 250 recognized high-P/T belts, about 20% belong to the A type and the rest to the B type. Most A-type zones lie in Europe and the Tethyan domain, include ultrahigh-pressure metamorphic terranes, and have metamorphic pressure up to 45 kbar. B-type zones occur mainly in the circum-Pacific orogenic belts and intracontinental orogens in Asia, and were recrystallized at P <12 kbar. Associated peridotites include garnet peridotite in the A type and strongly serpe...