The inherent link between precipitation mechanism and mineralogy (invisible gold, cinnabar, stibnite and fluorite) in the Southern Kyrgyzstan Hg-Sb belt

吉尔吉斯坦锑汞带西南部约有10个大型和小型Sb-Hg矿床，其中一些是国际上重要的Sb或Hg矿床，具有一定的矿物学和地球化学性质。例如，有的只有辉锑矿作为主要矿石矿物，有的只有或主要是朱砂，还有的两者兼而有之。这是一种“伸缩”效应，还是不同的降水机制导致了这一观察结果，目前尚不清楚。一些矿床具有复杂的汞-锑-(铅-铜)硫酸盐，甚至作为主要的矿石矿物。这些复杂的矿石可能是后期热液与早期形成的矿石相互作用的产物，因此是再活化的产物。有些矿石含有大量的古老矿物，另一些则没有，最后，吉尔吉斯斯坦西南部的矿床除了石英外，还含有作为一种重要的脉石矿物的萤石--这是非常罕见的，据我们所知，这种类型的矿床在国际上是独一无二的。本提案针对所有这些特点，将研究矿物结构和矿物组成，以建立热液事件的矿物序列/序列及其形成条件，将分析流体包裹体，以揭示所涉及的热液的组成和物理化学条件，将试图掌握氟的来源和对这些矿床形成的重要性，将试图在区域尺度上(即，在几个矿床中)试图对降水机制进行地球化学模拟，并将试图从所有这些数据和模拟结果中得出这类矿床的成因模式。该项目与瓦格纳教授(亚琛)的兄弟项目紧密相连。

The SW Kyrgysztan Sb-Hg belt comprises about 10 major and minor Sb-Hg deposits some of which are internationally important Sb- or Hg-deposits which show some mineralogical and geochemical peculiarities. For example, some of them have only Stibnite as main ore mineral, some only or mostly cinnabarite, and some both. If this is an effect of "telescoping" or if different precipitation mechanisms are responsible for this observation, is unclear. Some of the deposits show complex Hg-Sb-(Pb-Cu) sulfosalts, even as main ore minerals. Possibly, these complex ores are products of interaction of later hydrothermal solutions with earlier formed ores, hence products of remobilisation. Some of the ores contain significant amounts of old, others not, and, finally, the SW Kyrgyz deposits contain besides quartz also fluorite as an important gangue mineral - which is very unusual and, as far as we know, internationally unique for this type of deposit. The present proposal addresses all these peculiarities and will investigate mineral textures and mineral compositions to establish a mineral succession/sequence of hydrothermal events and their conditions of formation, will analyse fluid inclusions to unravel the composition and physico-chemical conditions of the hydrothermal solutions involved, will try to get a hold on the source and importance of fluorine for the formation of these deposits, will on a district scale (i. e., in several deposits) try to geochemically model the precipitation mechanisms and will try to derive a genetic model for this type of deposits from all these data and modelling results. The project is neatly tied to the sibling project of Prof. Wagner (Aachen).