| 引用本文: | 王天瑞, 侯林, 林方成, 熊富浩, 郭阳, 郭林楠, 徐思维, 曾祥婷, 施美凤, 丛峰.老挝-越南长山成矿带古特提斯构造岩浆演化与成矿作用[J].沉积与特提斯地质,2022,42(2):212-227.[点击复制] |
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| 老挝-越南长山成矿带古特提斯构造岩浆演化与成矿作用 |
| 王天瑞,侯林,林方成,熊富浩,郭阳,郭林楠,徐思维,曾祥婷,施美凤,丛峰 |
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(1. 中国地质调查局成都地质调查中心, 四川 成都 610081;
2. 成都理工大学地球科学学院, 四川 成都 610059) |
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| 摘要: |
| 老挝-越南长山成矿带位于特提斯构造成矿域东南段，发育大量古特提斯旋回岩浆岩和铜-金-铁-锡等多金属矿床，是研究东特提斯构造岩浆演化与成矿作用的天然实验室。本文系统梳理了长山成矿带的成岩成矿时代、矿床组合和岩石地球化学研究成果，揭示了长山成矿带古特提斯时期的岩浆岩时空格架，构建了晚石炭—中二叠世(317~264 Ma)哀牢山-马江洋的俯冲、中二叠—晚三叠世(263~235 Ma)华南地体与印支地体的碰撞以及晚三叠世(234~202 Ma)碰撞后伸展等构造演化过程。初步建立了长山成矿带各阶段的成矿模式，包括俯冲期斑岩-矽卡岩型Fe-Cu-Au和浅成低温热液型Cu-Au-Ag成矿(305~279 Ma)、碰撞期斑岩-矽卡岩型Sn和矽卡岩型Fe-Au成矿(249~236 Ma)、伸展期热液脉型Au矿化(212~204 Ma)。受限于晚三叠世晚期岩浆活动和成矿作用研究资料的缺乏，碰撞后伸展阶段的成矿作用仍有待进一步研究。 |
| 关键词: 古特提斯 长山成矿带 构造岩浆演化 成矿作用 |
| DOI：10.19826/j.cnki.1009-3850.2022.04014 |
| 附件 |
| 投稿时间：2022-04-14修订日期：2022-04-20 |
| 基金项目:国家自然科学重点基金课题“东南亚长山带锡多金属成矿作用研究”(92162215-1)、中国地质调查局二级项目“柬埔寨-老挝-越南铝土矿资源调查”(DD20201160) |
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| Paleo-Tethys tectonic-magmatic evolution and mineralization in the Truong Son metallogenic belt, Laos-Vietnam |
| WANG Tianrui, HOU Lin, LIN Fangcheng, XIONG Fuhao, GUO Yang, GUO Linnan, XU Siwei, ZENG Xiangting, SHI Meifeng, CONG Feng |
(1. Chengdu Center，China Geological Survey, Chengdu 610081, China;
2. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China) |
| Abstract: |
| The Truong Son metallogenic belt which spans Laos and Vietnam is located in the southeast part of the Tethys tectonic-metallogenic domain. It develops a large number of Paleo-Tethys igneous rocks and Cu-Au-Fe-Sn polymetallic deposits, which makes the Truong Son belt a natural laboratory for studying the tectonic-magmatic evolution and mineralization of the Eastern Tethys. This paper systematically combs the research findings of diagenetic and metallogenic age, deposit assemblage and whole-rock geochemistry in the Truong Son metallogenic belt, and reveals the temporal and spatial framework of igneous rocks in the Paleo-Tethys period of the Truong Son metallogenic belt, and establishes the tectonic evolution processes, including the subduction of Ailaoshan-Song Ma ocean plate in the Late Carboniferous to Middle Permian (317~264 Ma), the collision between the South China block and the Indochina block in the middle Permian to Late Triassic (263~235 Ma), and the post-collision extension process in the Late Triassic (234~202 Ma). The metallogenic model of the Truong Son belt is preliminary established, including porphyry-skarn type Fe-Cu-Au and epithermal type Cu-Au-Ag mineralization (305~279 Ma) in subduction period, porphyry-skarn type Sn and skarn type Fe-Au mineralization (249~236 Ma) in collision period and hydrothermal vein type Au mineralization (212~204 Ma) in extension period. Since there are few reports on magmatism and mineralization in the Late Triassic, the mineralization of extensional period still needs to be further studied. |
| Key words: Paleo-Tethys Truong Son metallogenic belt tectonic-magmatic evolution mineralization |