| 朱朝晖,张建芳,刘远栋,蔡晓亮,王振,龚瑞君,张琨仑.浙江仙霞—安吉地区晚中生代成矿类型、控矿要素及时空分布规律[J].矿产勘查,2025,16(4):725-740 |
| 浙江仙霞—安吉地区晚中生代成矿类型、控矿要素及时空分布规律 |
| Late Mesozoic metallogenic types, ore-controlling elements and temporal and spatial distribution patterns in Xianxia-Anji Area, Zhejiang |
| 投稿时间：2024-05-11 |
| DOI：10.20008/j.kckc.202504005 |
| 中文关键词: 成矿类型 控矿要素 分布规律 晚中生代 仙霞—安吉 浙江 |
| 英文关键词: metallogenic types ore-controlling factors distribution rule Late Mesozoic Xianxia-Anji Zhejiang |
| 基金项目:本文受中国地质调查局项目(12120115030001)和浙江省级基础性公益性战略性地质资金专项项目(﹝省资﹞2023019)联合资助。 |
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| 中文摘要: |
| 浙江仙霞—安吉地区位于钦杭成矿带北东缘，近年来新发现萤石、钨钼、银铅锌等大中型矿床 5处，是重要的找矿远景区。本文通过 1∶5万区调、矿调等工作，研究该地区与晚中生代岩浆作用有关的成矿类型，总结关键控矿要素和时空分布规律，为区域找矿进一步指明方向。研究认为区内成矿类型主要有接触交代型、石英(细)脉型、岩浆热液脉型、构造角砾蚀变岩型等；与接触交代型成矿有关的沉积建造主要为南华系、震旦系、寒武系等碳酸盐岩建造岩性或岩性组合；侵入建造主要为早白垩世中粒花岗闪长岩、中粗粒—粗中粒正长花岗岩、细粒正长花岗岩等；含矿构造主要为背斜褶皱、北东向和北西向断裂、层间破碎带、侵入岩内外接触带等。区内不同沉积建造、侵入建造、构造等成矿要素组合控制不同成矿类型，从岩体内接触带往外具有石英(细)脉型钨钼矿→接触交代型钨钼、铁、铅锌银矿→岩浆热液脉型萤石、锑、铅锌矿和构造角砾蚀变岩型银多金属矿演变的特征，同属于一个早白垩世岩浆多期次复合侵入成矿系统，野外应加强综合找矿。 |
| 英文摘要: |
| The Xianxia-Anji area in Zhejiang Province is located in the northeastern margin of the Qinzhou-Hangzhou metallogenic belt. In recent years, five large and medium-sized deposits such as fluorite, tungsten andmolybdenum, silver-lead-zinc have been discovered, which is important favourable prospecting region. Through 1∶ 50000 regional geological survey and mineralization survey, we are going to identify the metallogenic types relatedto late Mesozoic magmatism, and summary the key ore-controlling factors and distribution rules in this area, whichfurther points out the directions for regional prospecting. The study shows that the metallogenic types in this areamainly include quartz (fine) vein type, contact metasomatic type, magmatic hydrothermal vein type, structure brecciatype and altered rock type, etc. The intrusions are mainly early Cretaceous medium-grained granodiorite, medium-coarse & coarse-mediumgrained syenogranite, fine-grained syenogranite, etc. The ore-bearing structures aremainly anticline folds, NE trending and NW trending faults, interlayer fracture zones, and internal and external con-tact zones of intrusive rocks. Different combinations of metallogenic elements such as sedimentary formation, intru-sive formation and structure control different metallogenic types. From the contact zone inside the rock mass to theoutside, there are quartz (fine) vein type tungsten molybdenum ore → contact metasomatic tungsten molybdenum,iron, lead zinc silver ore → magmatic hydrothermal vein type fluorite, antimony, lead zinc ore and structural alteredbreccia rock type silver polymetallic ore. The evolution characteristics belong to an Early Cretaceous magmatic andmulti-stage intrusive metallogenic system. Comprehensive prospecting should be strengthened in the field. |
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