摘要
东秦岭超大型钼矿带是世界上重要的钼矿带之一，带内分布着几个大型至超大型钼矿床。与这些大型－ 超大型钼矿床有关的岩体顶部都发育了钾长石石英条纹岩。钾长石石英条纹岩中钾长石富Ｓｉ，Ｋ，贫Ｎａ；其三斜度、有序度低。石英包裹体中Ｆ－ ，Ｋ＋高，ＣＯ／ＣＯ２ 低，缺少ＣＨ４，形成温度为４００℃～５００℃。氢氧同位素分析表明：δ１８ Ｏ＝ ９．０６×１０－ ３ ～１０．０３×１０－ ３ ，δＤ＝ － ５７．２２×１０－ ３ ～－ ７５．１０×１０－ ３ ，证明钾长石石英条纹岩的物质来自晚期岩浆热液。
The eastern Qinling is one of the most important molybdenum metallogenetic belts in the world. Several ultra large scale molybdenum deposits occur in the belt. Potash feldspar quartz crenulate often appears on the top of rock masses which are related to the molybdenum deposits. The potash feldspar is rich in Si and K and poor in Na. Texture analysis shows that potash fedspar is of low triclinicity and ordering index. The inclusiond of quartz are rich in F - and K + and poor in CH 4, with relatively low CO/CO 2 ratio. Homogeneous temperature revealed by quartz inclusions ranges from 400℃～500℃. Ther analysis of isotopic compositions of H and O shows that δ 18O ranges from 9.06×10 -3 to 10.03×10 -3 and δD from -57.22×10 -3 to 75.10×10 -3 , indicating that the rock forming materials are originated from late stage magmatic solution.
出处
《矿物岩石》
CAS
CSCD
北大核心
1999年第3期11-15,共5页
Mineralogy and Petrology
基金
国家自然科学基金
关键词
超大型
钼矿床
钾长石
石英
条纹岩
东秦岭
ultra large molybdenum deposit potash feldspar quartz crenulate Eastern Qinling
