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南乌拉尔与大别高压超高压变质地体的对比与启示

COMPARISON OF HIGHPRESSURE AND ULTRAHIGHPRESSURE METAMORPHISM IN MAKSYUTOV COMPLEX OF SOUTH URALS AND IN DABIE MOUNTAINS AND ITS ENLIGHTENMENT
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摘要 通过对俄罗斯南乌拉尔造山带Maksyutov杂岩的野外考察及资料分析,并与大别HP-UHP变质地体进行对比后认为,两个高压超高压变质产物有着很大的相似性,如:皆处在起源于微陆、微洋、多岛海环境的俯冲碰撞带、缺乏与超高压变质作用同期的岩浆作用和洋壳消亡证据等。进一步探讨二者形成机制的共性,有利于揭示陆壳俯冲及折返过程中物质的运动特性,查明俯冲带内构造热演化与岩浆作用关系等重要地质问题。Maksyutov杂岩中的块状石墨可能源于金刚石,这一认识值得重视和深入研究。 Based on the field investigation on the Maksyutov complex of South Urals and the literatural research materials,the highpressure and ultrahighpressure metamorphisms in Maksyutov complex and Dabie mountains are compared.They are similar in many respects.Principal analogies relate to that both are distributed along the subductioncollision orogenic belt developed from a paleogeographical landscape of small ocean basin,microcontinent and archipelago,which resulted from the plate separation,and to the absence of subductionrelated magmatism events and the relics of coeval ophiolite.Farther investigation on the similarities of the two HP and UHP metamophic belts is valuable to reveal the kinetic characteristics of crustal materials during subduction and uplift,and to the discovery of the relationship of the magmatism and the heat transfer.In addition,the possibility of the blocky graphite derived from diamond points out a new direction for seeking diamond deposit.
作者 刘嵘 桑隆康
出处 《地质科技情报》 CAS CSCD 北大核心 1998年第2期13-17,共5页 Geological Science and Technology Information
基金 国家自然科学基金 地矿部重点科技项目 国家教委博士点基金
关键词 杂岩 大别山 高压超高压 变质地体 变质岩 Maksyutov complex,Dabie mountains,highpressure and ultrahighpressure metamorphic complex,blocky graphite
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