摘要
本文在系统查阅国内外文献的基础上,结合对我国部分地区电气石的研究,讨论了电气石在不同成岩成矿环境中的鉴别特征及应用条件。在以火山岩和以沉积岩为含矿岩石的块状硫化物矿床中,电气石通常为富镁的镁电气石—黑电气石固溶体系列。在花岗岩、伟晶岩和细晶岩中,电气石有镁电气石—黑电气石固溶体系列→黑电气石—锂电气石固溶体系列→锂电气石和镁电气石—黑电气石固溶体系列→黑电气石电两个方向。此外,还提出了应用电气石指示成岩成矿环境的一些限制因素。
The tracer of tourmaline for rock-forming and metallogenic environments hasbeen studied for a short time, but a series of significant results have been achieved,especially in the study of syngenetic massive sulfide deposits. Based on previousdata in conjunction with the study on several deposits, the diagnostic character-istics of tourmalines in different rock-forming and metallogonic environments andtheir applied conditions are systematically discussed in the paper. Tourmalines tendto be marked by Mg-enriched dravite-schorl solid-solution series in the massivesulfide deposits hosted in sedimentary rocks and volcanic rocks,and have two evo-lutional trends, i. e. dravite-schorl solid solution series→schorl-elbaite solutionseries→elbaite and dravite-schorl solid solution series→schorl in granitoids,pegma-tite and aplite. The microprobe analyses of tourmalines from the Baotan Sn-Cudeposit, Shizhuyuan W-Sn-Mo-Bi deposit, Zongjialong Sn-Cu deposit,Dachang pol-ymetallic tin deposit, Lianhuashan copper deposit and Aoyoute copper deposit showthat the tourmalines in hydrothermal deposits associated with granite are Fe-enrichedschorl-dravite solid solution and/or schorl. The tourmaline composition shows reg- ular changes outward from the contact zones of the granite intrusions. The changesdepend on the chemical composition of the country rocks.
出处
《地质论评》
CAS
CSCD
北大核心
1993年第6期497-507,共11页
Geological Review
基金
国家自然科学基金(项目编号:49273162)
关键词
电气石
成岩环境
成矿环境
示踪剂
tourmaline
rock--forming environment
metallogenic environment indicator
