摘要
在系统总结独玉岩石学、矿物学特征的基础上,进一步研究了独玉的成因,提出了独山玉矿的成岩成玉模式。独山玉矿属斜长岩浆期后高中温热液矿床,独玉形成温度355～430℃,最高可达500℃。独玉形成具多期多阶段性,在主要成玉阶段,从早到晚,依次形成透水白玉→干白玉→绿白玉→紫独玉→天蓝玉,斜长石牌号从An97→An98→An98→An99→An100。利用Lark和Naldret等的深度—温度图所建立的成岩成玉模式,明确显示了独山不同时代海洋地热的关系、不同温度—深度地幔物质局部熔融的程度及不同岩体和玉石的形成过程。
On the basis of the systematic summarization of petrological and mineralogicalcharacteristics of Dushan jade, the genesis of Dushan jade has been further studied and thegenetic model for rocks and jade and the range of reconnaissance in Dushan have beenproposed. The Dushan jade deposit is a plagioclase rock-postmagmatic hydrothermal onewith high and middle temparature. The temparature of the formation of the jade ranges from355～430℃ with in the reach of maximum 500℃. In the jade-forming stage,from the earlyperiod to the late one,pervious jade→dry white jade→green jade→pruple jade→azure jadewere successively formed and the plagioclase An in jade increased gradually, from An97→An98→An99→An100. Based on the genetic model for rocks and jade in Dushan set up byusing the Lark's and Naldret's depth-temperature diagram,geotherm relations between oceansof different ages,local meltability of mantle-drived substances of different temperatures anddepths and the processes of the formation of different rock bodies and jades.
出处
《桂林理工大学学报》
CAS
1991年第S1期8-16,共9页
Journal of Guilin University of Technology
关键词
独玉
玉石
斜长石
岩石成因
矿床成因论
南阳
独山
Dushan jade
jade
plagioclase
petrogenesis
genetic model of rock
metallogeny
Nanyang
Dushan
