干旱地区硫化矿床风化过程的穆斯堡尔谱特征--以青海锡铁山铅锌矿为例

测定了青海锡铁山硫化矿床氧化带矿物的室温穆斯堡尔谱，结果表明氧化带硫酸盐矿物的穆斯堡尔谱具较小的同质异能移、四级矩分裂值分布范围较大、无磁超精细分裂等特征。在已有工作的基础上，根据氧化带垂向不同位置矿物的穆斯堡尔谱特征划分出铁锰帽亚带、高铁矾类亚带（进一步划分出单峰型、双峰型和三峰型三个次亚带）、低铁矾类亚带及原生硫化物带等垂向分带，每一亚带代表特定的物化条件，反映了干旱地区硫化矿床风化过程的阶段性。

The Mssbauer Spectra Characteristics in Weathering of Sulfide Deposits in Drought District-A Case Study of Xitieshan Lead Zinc Deposit, Qinghai Province

The 57 Fe Mssbauer spectra of sulphate minerals from oxiydationzone of sulfide deposit in drought district have been determined at normal temperature in the paper. The results show that their Mssbauer spectra arecharacterized by the smaller isomer shifts, a wider distribution range of quadrupole splittings, and no magnetic hyperfine splitting, etc.. Based on the research results obtained previously, the oxidation zone of sulfide deposit with clear zonality have been divided into Fe-Mn gossan subzone, ferric vitriol subzone (subdivided into single peak type, double peak type, and triple peak type etc.),ferriferous vitriol subzone and primary sulfide zone etc. vertical zones, according to their Mssbauer spectra at different vertical position, every subzone imply a certain physicochemical condition and oxidation stage of sulfide deposit.