| 小兴安岭—张广才岭成矿带铅锌多金属矿成矿规律和区域成矿模式 |
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| 关键词:Lesser Xing’an Range–Zhangguangcai Range metallogenic belt lead-zinc deposits genetic types superimposed reformation type skarn type |
| 基金项目:本文由中国矿产地质志项目(编号: DD20221695)资助。 |
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| Metallogenic Regularity and Regional Metallogenic Model of Lead-zinc Polymetallic Deposits in the Lesser Xing’an Range–Zhangguangcai Range Metallogenic Belt |
| The Lesser Xing’an Range–Zhangguangcai Range metallogenic belt, located within the Jilin–Heilongjiang metallogenic province, is one of the most significant metal metallogenic belts in Heilongjiang province. It hosts 72% of the lead-zinc mineral occurrences and 80% of the lead-zinc resource reserves in the province. In this study, data on lead-zinc polymetallic deposits within the belt were compiled, and their metallogenic characteristics were summarized. The lead-zinc deposits are primarily hosted in the Lower–Middle Cambrian Qianshan Formation and Middle Permian Tumenling Formation, both of which belong to marine volcanic-sedimentary sequences dominated by Paleozoic normal sedimentary rocks. The main metallogenic epochs were the Early–Middle Cambrian and the Late Triassic–Early Jurassic, which formed marine volcanic-sedimentary-type lead-zinc deposits and skarn-type lead-zinc polymetallic deposits, respectively. The marine volcanic-sedimentary lead-zinc deposits were subsequently overprinted by Late Triassic–Early Jurassic magmatic-hydrothermal fluids, forming superimposed reformation-type deposits. The superimposed reformation-type deposits exhibit relatively simple metallogenic elements that predominantly form independent lead-zinc deposits, whereas skarn-type deposits display complex elemental associations that often coexist with high-temperature elements such as iron, tungsten, molybdenum, and copper. The nature of coexisting minerals provides critical genetic insights: the superimposed reformation-type reflects primary sedimentary mineralization, whereas the skarn-type indicates formation through magmatic-hydrothermal processes. Integrating the metallogenic features of the belt, this study proposes a two-stage composite metallogenic model involving early volcanic-sedimentary material accumulation followed by late magmatic re-enrichment. This model effectively explains the complex coexistence of high-, medium-, and low-temperature metallogenic elements in the Lesser Xing’an Range–Zhangguangcai Range metallogenic belt. |
| LÜ Changlu,HAO Zhengping,ZHANG Wenlong,HUANG Fan.2026.Metallogenic Regularity and Regional Metallogenic Model of Lead-zinc Polymetallic Deposits in the Lesser Xing’an Range–Zhangguangcai Range Metallogenic Belt[J].Acta Geoscientica Sinica,47(4):837-852. |
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