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本文通过对都龙锡锌多金属矿床的铅、锶、硫同位素地球化学特征的系统研究 ,揭示该矿床成矿物质具有多来源的特点 :成矿金属主要来源于基底前寒武系变质岩和老君山花岗岩 ;硫主要来源于中寒武世热水沉积期还原的海水硫酸盐和深部岩浆房 ,同时 ,燕山期老君山花岗岩为后期叠加成矿作用提供了硫源 ,变质围岩也提供了一部分成矿物质。矿石中单矿物的铷 -锶等时线年龄为 (76 .7± 3.3)× 10 6a ,反映矿床明显受到燕山晚期岩浆热液作用的叠加。
In this paper, we systematically studied the isotope geochemical characteristics of lead, strontium and sulfur in the Du Long tin-zinc polymetallic deposit, revealing that the ore-forming materials of the deposit have multiple sources: the metallogenic metals are mainly derived from basal Precambrian metamorphic rocks and Laojunshan granite; sulfur mainly comes from the seawater sulphate and deep magma chamber reduced during the Middle Cambrian hydrothermal sedimentary period; at the same time, the Laoshanju granite in the Yanshan Period provided the sulfur source for the post-superimposition mineralization and metamorphic rocks provided Part of the mineralization. The rubidium-strontium isochron age of the single minerals in the ore is (76.7 ± 3.3) × 10 6 A, which indicates that the ore deposit is obviously superposed by the late Yanshan magmatism.