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碲在官田黄铁矿矿床中的聚集及地球化学

引用本文：黄富荣.1998.碲在官田黄铁矿矿床中的聚集及地球化学[J].地球学报,19(1):50-58.

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作者	单位
黄富荣	化学工业部化学矿产地质研究院

中文摘要:碲是官田黄铁矿矿床中的重要伴生组分，高度聚集在寄主矿物黄铁矿中，含碲矿物是楚碲铋矿、赫碲铋矿和碲铋矿。成碲和聚碲的物理化学条件是：压力低于１０ＭＰａ，温度１４０～２２０℃，含碲流体的盐度低于１２ω（ＮａＣｌ），离子类型为ＳＯ２－４－Ｋ＋－Ｃａ２＋型，ｐＨ值为４．４～５．８，Ｅｈ值为－０．５Ｖ，ｆＯ２＜１０－２５×１０５Ｐａ，ｆＣＯ２＜１０１．８×１０５Ｐａ，ｆＳ２为（１０－２１．３４～１０－１５．７２）×１０５Ｐａ，ｆＴｅ２为（１０－１１．９３～１０－８．７２）×１０５Ｐａ。含碲热液具多来源，成碲和聚碲时期以天水为主导。碲的可能迁移形式是［ＴｅＳ３］２－和［ＡｕＴｅＳ３］－。文章最后与大水沟独立碲矿床进行了综合对比。

中文关键词:碲赋存状态含碲流体成碲聚碲

Concentration and Geochemical Behaviour of Tellurium in Guantian Pyrite Deposit

Abstract:Tellurium represent ,an important associated element,intensively concentrating in pyrite mineral as tsumoite、hedleyite and tellurobismuthite.This geochemical process can take place under such prerequisites as:pressure<10 MPa;temperatures=140～220 ℃;salinity of Te-bearing hydrothermal solution<12ω(NaCl) eq %;ionic type as SO 2- 4-K +-Ca 2+ ;pH=4.4～5.8; E h=-0.5V; f O 2 <10 -25 ×10 5 Pa; f CO 2 <10 1.8 ×10 5 Pa; f S 2 =(10 -11.93 ～10 -8.72 )×10 5 Pa Te_carrying hydrothermal solutions came from many sources,but predominantly from meteoric water during Te concentration.Tellurium migrated possibly in a form of 2- or -.Finally,the study correlated the Guantian Te_accompanying mineralization with the independant Dashuigou Te deposit.

keywords:Te-geochemical behaviour Te-bearing hydrothermal solution Te concentration

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