摘要
本文报道了我国山东蒙阴金伯利岩中蒙山矿的一些研究成果。作者在该区采集的蒙山矿与锶钛铁矿-镧铀钛铁矿族(Crichtonite-davite group)矿物等结构和成分介于钡蒙山矿(lindsleyite)与蒙山矿(mathiasite)之间,其BaO含量为2.13—2.89wt％,K_2O含量为0.75—1.27wt％,K/Ba原子比为0.898—1.938;特别富Cr_2O_3、ZrO_2和LREE_2O_3。本文还阐述了山东蒙山矿的类质同象和晶体结构特点,讨论其对地幔交代作用研究的启示。
Some results of the study on mathiasite present in kimberlite at Mengyin, Shandong, China are reported in this paper.Samples of mathiasite collected by the present authors are the same in structure as the crichtonite-davite group minerals. Their compositions are intermediate between lindsleyite and mathiasite, with BaO ranging from 2.13 to 2.89 wt. %, K_2O 0.75 to 1.27 wt. %, K/Ba (atomic ratio) 0.898—1.938. The mineral is particularly rich in Cr_2O_3, ZrO_2 and LREE. Also described and discussed in this paper are the features of isomorphism and crystal structure and some clues to the study of metasomatism in the mantle.
出处
《矿物学报》
CAS
CSCD
北大核心
1990年第3期221-226,共6页
Acta Mineralogica Sinica
关键词
蒙山矿
金伯利岩
类质同象
mathiasite
isomorphism
kimberlite
Shandong
