阿尔泰山南缘克兰盆地主要铅锌矿地质及成矿流体特征

Geological and metallogenic fluid characteristics of the lead-zinc deposits in the Kelan Basin in the southern margin of the Altai Mountains

克兰盆地是阿尔泰山南缘最大的火山沉积盆地,位于阿尔泰南部增生造山带的弧后盆地内。该盆地内矿床多为喷流沉积改造型铅锌矿床,它们具有相似的成因,且形成于同一时期,研究表明这些矿床也具有相似的流体包裹体特征、均一温度及组成。成矿流体物理化学条件的改变对成矿有重要意义。

Located in a rift of the Devonian island arc in the central Asian orogenic belt, the Kelan Basin is the largest basin of the southern Ahai Mountains, north Xinjiang. According to our research,the ore deposits in Kelan Basin are of volcanic-sedimentary-exhalative type. Most of the deposits have a similar genesis and formed at the same stage. The deposits show similar features, including similar homogenization temperature and composition of fluid inclusions. The changes in physiochemical conditions were important for ore formation.