收稿日期: 1998-11-20
修回日期: 1999-03-22
网络出版日期: 1999-10-01
基金资助
高等学校博士点专项科研基金项目“胶东半岛地缝合带两侧变质相及蛇绿岩研究”(编号:96000121)及国家自然科学基金项目“胶东地区古大陆边缘地体地质学与岩石大地构造学研究”(编号:49272130)资助。
DISCUSSION ON PROBLEMS CONCERNING THE PROTEROZOIC OPHIOLITE STUDY
Received date: 1998-11-20
Revised date: 1999-03-22
Online published: 1999-10-01
倪志耀,王仁民,袁建平
. 元古宙蛇绿岩研究中有关问题的讨论
The Proterozoic ophiolite research has achieved gigantic progress in the recent two decades.Some critical problems such as preservation,diversity,high-pressure metamorphism,geochronology and methodology for the Proterozoic ophiolite need to be further explored. The Proterozoic ophiolite has diversity characteristics in time-space distribution ,type of end-members, metamorphism, geotectonic setting and constraint of magmatic reservior. The high-ultrahigh pressure metamorphic rock that its primitive rock is the Proterozoic ophiolite may be another preservation form of the Proterozoic ophiolite.The discrimination of the Proterozoic ophiolite must be on the basis of systematical study for tectonic mapping, isotopic geochronology and geological-geochemical characteristics. Therefore, the Proterozoic ophiolite research in China should strengthen the synthetical study of tectonic mapping-petrographic analysis,and acquires the dependable information about ophiolite genesis through isotopic dating and geochemical study.The geochemical particularity of Proterozoic oceanic crust and influence of later stage deformation-metamorphism have evident constraint for the formation and evolution of the Proterozoic ophiolite,so we can not apply the discriminative figures and research methods about Phanerozoic ophiolite mechanically to the study of the Proterozoic ophiolite.
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