| 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 |
| 投稿时间：2025-04-08 修订日期：2025-07-11 点此下载全文 |
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| 中文摘要:小兴安岭—张广才岭成矿带位于吉黑成矿省，是黑龙江省重要的金属成矿带之一，赋存了黑龙江省72%的铅锌矿产地和80%的铅锌矿资源储量。本文通过对小兴安岭—张广才岭成矿带铅锌多金属矿资料的整理，总结了铅锌多金属矿的成矿特征，认为铅锌矿的赋存地层主要为下-中寒武统铅山组和中二叠统土门岭组，是一套以古生界正常沉积岩为主的海相火山—沉积建造；成矿时代主要是早-中寒武世和晚三叠-早侏罗世，分别形成海相火山-沉积型铅锌矿床和矽卡岩型铅锌多金属矿床，海相火山-沉积型铅锌矿床遭受晚三叠-早侏罗世岩浆热液的改造形成叠加改造型矿床。其中，叠加改造型矿床的成矿元素种类比较简单，以铅锌独立矿床为主，而矽卡岩型矿床的成矿元素种类比较复杂，常与铁、钨、钼、铜等高温元素共生。共生矿产种类对矿床成因具有重要的指示意义，叠加改造型主要反映原始沉积成矿特征，而矽卡岩型主要反映了岩浆热液成矿特征。综合小兴安岭—张广才岭成矿带铅锌多金属矿成矿特征，提出了早期火山-沉积作用成矿物质聚集和晚期岩浆作用成矿物质再富集的二阶段复合成矿模式，较合理地解释了小兴安岭—张广才岭成矿带高中低温成矿元素复杂共生的成矿现象。 |
| 中文关键词:小兴安岭-张广才岭成矿带 铅锌矿床 成因类型 叠加改造型 矽卡岩型 |
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| Metallogenic Regularity and Regional Metallogenic Model of Lead-Zinc Polymetallic Deposits in the Lesser Xing’ an Range- Zhangguangcai Range Metallogenic BeltLu Changlu1),Hao Zhengping1),Zhang Wenlong1),Huang Fan2) |
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| Abstract:Lesser Xing’ an Range - Zhangguangcai Range metallogenic belt, situated 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. By compiling data on lead-zinc polymetallic deposits in this belt, this study summarizes their metallogenic characteristics. It concludes that lead-zinc deposits are primarily hosted in the Lower-Middle Cambrian Qianshan Formation and the Middle Permian Tumenling Formation, both belonging 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 respectively formed marine volcanic-sedimentary type lead-zinc deposits and skarn-type lead-zinc polymetallic deposits. The marine volcanic-sedimentary lead-zinc deposits were subsequently overprinted by Late Triassic-Early Jurassic magmatic-hydrothermal fluids, forming superimposed-reformation deposit types.The superimposed-reformation type deposits exhibit relatively simple metallogenic elements, predominantly forming independent lead-zinc deposits, whereas skarn-type deposits display complex elemental associations, often coexisting with high-temperature elements such as iron, tungsten, molybdenum, and copper. The types of coexisting minerals provide critical genetic insights: the superimposed-reformation type reflects primary sedimentary mineralization, while the skarn-type signifies 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 and 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 Metallogenic Belt. |
| keywords:Lesser Xing’ an Range - Zhangguangcai Range metallogenic belt Lead-zinc deposits Genetic types superimposed-reformation type Skarn type |
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