摘要
柴达木盆地北缘东端沙柳河一带榴辉岩呈布丁构造赋存在新元古代末期花岗质片麻岩中,榴辉岩主要由石榴子石、绿辉石和金红石等矿物组成。通过对该地榴辉岩的岩石化学和变质条件研究,发现其峰期变质条件为492.12 ℃~653.48 ℃和1.008~1.625 GPa,未达到超高压的环境,在岩石中也未发现明显的超高压证据,与柴达木盆地北缘其他地区(鱼卡河、锡铁山、野马滩)榴辉岩有所区别。
The eclogite was found in the Neoproterozoic granitic gneiss in Shaliuhe, the north margin of the Qaidam Basin. It occurs in shape of lens or boundins, and mainly composed of garnet, omphacite and rutile etc. Based on the reseach into petrochemistry and metamorphic condition of the eclogites here, we found its peak metamorphic conditions is 492.12 ℃^(653.48 ℃) and 1.008~1.625 GPa , not achieve the UHP environment, and no evident UHP evidence was found in eclogites here, it is distinct from the other eclogite outcrop places(Yuqiahe, Xitieshan, Yematan)in the north Qaidam Basin.
出处
《地球科学与环境学报》
CAS
2005年第1期14-18,共5页
Journal of Earth Sciences and Environment
基金
中国地质调查局地质调查项目(200113000062)
