玲珑花岗岩斜长石的费氏台研究及岩体形成时代问题的初步探讨

作者在地质调查基础上,对取自玲珑花岗岩、包体和胶东群变质岩的25个有代表性的样品,用费氏台测定了113个斜长石颗粒。本文根据测定资料的统计分析,探讨了玲珑花岗岩斜长石成分、有序度、双晶类型、演化规律及其成因意义,并将玲珑花岗岩与金喆佑、舟桥三男（1972）建立的不同时代花岗岩模式进行了对比。上述研究的初步结果认为玲珑花岗岩属于元古代交代-深熔成因。

A U-STAGE INVESTIGATION OF PLAGIOCLASE FROM LINGLONG GRANITE AND A PRELIMINARY DISCUSSION ON THE FORMING AGE OF THE MASSIF

Based on the geological investigation of that region, 113 grains of plagiocles out of 25 samples,considered to be representative for the Linglong granite, its enclaves and metamorphic rocks from Jiaodong Group, are studied with a U-stage by the author. The characteristics of chemical composition, ordering, types of twinning, rules of evolution and the petrogenetic significance of plagioclase from Linglong granite are discussed according to the statistical analysis of the data obtained. A comparison of the model of the Linglong granite is made with that of the granites of various age established by Chcul Woo Kim and Mitsuo Hunahashi ( 1972 ) . The preliminary conclusion of the research mentioned above is that Linglong granite is a Proterozoic granite of metasomatic-a,natexitic origin.