内蒙古白音诺铅锌矿床富锰单斜辉石与矿化的关系

内蒙古白音诺铅锌矿床是我国北方一个典型矽卡岩矿床，具有大而富的特点，矿区矽卡岩广泛发育，富锰单斜辉石矽卡岩与矿化的关系最为密切。单斜辉石主要为两期形成。早期富Ｍｇ，贫Ｆｅ，Ｍｎ的透辉石形成于较高的温度、ｆＯ２和ＰＨ条件下；晚期富Ｆｅ，Ｍｎ的锰钙铁辉石形成于较低的温底、ｆＯ２和ＰＨ条件下，后者与铅锌矿化具有密切的时空关第。成矿流体自矿区南西向北东方向流运过程中物理化学条件的改变，是造成矽卡岩矿物及矿

Study on the relationship between Mn-rich Clinopyroxene and Metallization in the Baiyinnuo Pb-Zn Deposit,Inner Mongolia

The Baiyinnuo large and high-grade Pb-Zn deposit in Inner Mongolia is a representative skarn-type one. In the ore district skarns extensively developed and the Mn-clinopyroxene skarn most closely related to the metallization. The clinopy oxene mainly crystallized in two stages : the earlier one was rich in Mg and poor in Fe and Mn, with diopside formed at higher temperture, fO_2 and pH; The later one,Fe-and Mn-rich manganhedenbergite,formed under the condition of lower temper ture,fO_2 and pH and closely related to the Pb-Zn metallization. The changes of fluid flow from southeast to northwest of the ore district resulted in the zoning of skarn and metallization. The manganhedenbergite can be considered as an important ind-cator for Pb-Zn metallization.