泰山地区新太古代—古元古代地壳演化研究的新进展

详细信息

NEW ADVANCES IN THE STUDY OF NEOPROTEROZOIC-PALEOPROTEROZOIC CRUSTAL EVOLUTION IN THE TAISHAN AREA

摘要: 泰山地区在中太古代末发育科马提质和拉斑玄武质绿岩，并强烈褶皱变形和变质。在新太古－古元古代则清楚地表现出５个深成岩浆侵入事件。１８００～１７００Ｍａ间该区完全刚性化，伴随刚性化地壳再次裂解和济宁沉积凹陷形成，沿断裂系统贯入平直延伸数十公里的辉绿岩脉。

Abstract: At the end of the Middle Archean there occurred komatiitic and tholejitic greenstone andstrong folding and metamorphism. The Neoproterozoic-paleoproterozoic clearly witnessed fiveintrusive events of abyssal magmas. Between 1800-1700 Ma B.P. the Taishan area was com-pletely rigidized, accompanied by an additional break-up and formation of the Jining depres-sion. In the study area a straight diabase dike is injected along the fault system and extends upto a few tens of kilorneters.