摘要
应用部分提取技术研究湘西地区新元古界—寒武系中锑和砷元素的存在相态表明,岩石中以可交换离子、与碳酸盐有关、与硫化物有关和赋存于硅酸盐矿物晶格中4种形式存在的锑元素分别占岩石中锑总量的18.65%、0.85%、31.41%和43.81%;砷则分别为7.05%、4.29%、56.11%和29.18%。呈易迁移相态存在的锑和砷分别为55.91%和67.45%。在含硫开放体系中,岩石中元素的淋滤率与其中易迁移相态所占百分数值呈正相关关系。这为该区存在锑、砷矿源层的认识提供了实验证据。
The speciations of antimony and arsenic in the Neoproterozoic-Cambrian strata in western Hunan have been studied with partial dissolution techniques. In rocks, Sb and As have four modes of occurrence: exchangeable, bound to sulfides, bound to carbonates and in silicate mineral lattice. The average percentages of the four fractions of antimony are 18. 65% , 0. 85% , 31. 41% and 43. 81%, respectively, and the average percentages of the four fractions of arsenic are 7. 05%, 4. 29%, 56. 11% and 29. 18%, respectively. The movable fractions of antimony and arsenic are 55. 91% and 67. 45%, respectively. The leaching rates of elements in the open sulfur-bearing system are approximately proportional to the percentages of movable fractions, which furnishes experimental evidence for the existence of source beds of antimony and arsenic in the region.
出处
《地质论评》
CAS
CSCD
北大核心
1998年第1期77-82,共6页
Geological Review
基金
国家自然科学基金
国家教委跨世纪优秀人才基金联合资助
关键词
矿源层
新元古界
寒武系
锑
砷
存在相态
speciations of elements
source bed
experimental geochemistry
western Hu-