摘要
硅质岩为矿床的主要合矿岩石，其产状与矿体产状一致，矿体厚度与硅质岩厚度密切相关。含矿硅质岩的化学成分以富Ｆｅ，Ｍｎ，Ｋ２Ｏ而贫Ａｌ２Ｏ３，Ｎａ２Ｏ为特征，铅同位素组成稳定，以壳源铅为主，稀土总量较低，轻稀土含量大于重稀土，δＥｕ，δＣｅ表现为弱亏损．矿石中发育同生沉积成矿组构．硅质岩与锑矿均为热水沉积成因，并在后期构造作用中遭受改造，使矿化进一步富集于倒转背斜核部和正常翼。
Silicalite is the host rock of Muli Sb deposit.Orebodies. and silicalite are of the same occurrence.The thickness of orebodies is closely related to that of the silicalite.The silicalite is rich inSiO2, Fe, Mn and K2O,but poor in Na2O and Al2O3. The composition of pb isotope is stablewith mostly lead from the earth crust. The characteristic of REE of ore-bearing silicalite isLREE-rich type. The anomaly parameters of Eu and Ce are weak-depleted.The total amountsof REE are relatively low.There are many syndiagenesis fabrics in the Ores. It is believed thatthe silicalite and antimony ores are formed as a result of hydrothermal-sedimentation. and reformation by the later tectonic processes.The ore is further rich in the core and normal limbs ofoverturned anticline.
关键词
锑矿床
矿床成因论
热水沉积
硅质岩
Sb deposit
metallogeny
hydrothermal-sedimentation
tectonic reformation
silicalite
Yunnan
