CAJ | 학술논문

小龙河锡矿床近矿绿泥石化蚀变显著，与锡矿的矿化关系密切。绿泥石的矿相学特征显示小龙河锡矿床绿泥石蚀变可分为明显的强弱两种绿泥石化类型。利用电子探针化学成分分析数据，计算了绿泥石的 AlIV 、AlVI 、Fe2＋/（Mg2＋＋Fe2＋）和 Mg2＋/（Mg2＋＋Fe2＋）等相关参数，并推算出绿泥石形成时的温度、氧逸度和硫逸度。结果表明：随着蚀变的增强，绿泥石中Mg 和 Si 元素含量减少，Al、Mn 和 Fe 元素含量增加；绿泥石主要为富铁的鲕绿泥石，指示绿泥石形成于还原环境。绿泥石的形成温度在196～229℃之间，平均为213℃，lgf O2在-43．4～-48．0之间，平均为-44．6，lgf S2在-15．9～-18．3之间，平均为-16．6。绿泥石形成机制主要为交代-结晶和迁移-结晶2种。绿泥石为锡矿化晚阶段产物，一定程度上反映了锡矿形成条件的变化。
소룡하석광상근광록니석화식변현저，여석광적광화관계밀절。록니석적광상학특정현시소룡하석광상록니석식변가분위명현적강약량충록니석화류형。이용전자탐침화학성분분석수거，계산료록니석적 AlIV 、AlVI 、Fe2＋/（Mg2＋＋Fe2＋）화 Mg2＋/（Mg2＋＋Fe2＋）등상관삼수，병추산출록니석형성시적온도、양일도화류일도。결과표명：수착식변적증강，록니석중Mg 화 Si 원소함량감소，Al、Mn 화 Fe 원소함량증가；록니석주요위부철적이록니석，지시록니석형성우환원배경。록니석적형성온도재196～229℃지간，평균위213℃，lgf O2재-43．4～-48．0지간，평균위-44．6，lgf S2재-15．9～-18．3지간，평균위-16．6。록니석형성궤제주요위교대-결정화천이-결정2충。록니석위석광화만계단산물，일정정도상반영료석광형성조건적변화。
Chloritization is obvious near the Xiaolonghe tin deposit.It is closely related to the tin mineralization.Mineragraphy study shows that the chloritization there can be divided into two types, that is,weak chloritization and strong chloritization.The relative parameters of chlorite such as AlIV , AlVI ,Fe2 +/(Mg2 + +Fe2 + ),Mg2 +/(Mg2 + +Fe2 + ),forming temperature,oxygen fugacity and sulfur fugacity are calculated based on the electron microprobe data.The results show that the contents of Mg and Si increase and the contents of Al,Mn,Fe decrease with the increase of chloritization degree. The chlorite is mainly composed of chamosite which is rich in Fe,indicating that the chlorite forms in a reduced environment.The formation temperature is 196 ~229℃ (averaging 213℃).The lgf O 2 is-43.4~-48.0 (averaging -44.6)and the lgf S 2 is -15.9~-18.6 (averaging -16.5).The main formation mechanisms are metasomatism-crystallization and migration-crystallization.This indicates that the chlorites are the products at the late stage of tin mineralization and reflects the change of the conditions when the tin deposit forms.