摘要
高产热花岗岩是指富含放射性产热元素U、Th和K,产热率值≥5μW/m^(3)的花岗岩类。作为潜在的地热资源——干热岩,高产热(HHP——high heat production)花岗岩研究备受各国关注,而其金属成矿效应却缺乏相应的重视与综述。高产热花岗岩通常为多期堆叠形成的杂岩体,具有富碱、低磷特征,多数呈现高分异演化特征,一般与大型—超大型热液金属矿床密切相关。笔者等明确高产热花岗岩与稀有—稀土金属矿床(尤其W—Sn矿床)和与还原性侵入体有关金矿床关系密切,而且高产热花岗岩具有持久分异与元素富集效应以及延迟加热效应,该效应可能有助于长寿命岩浆—热液成矿系统与大型金属矿床形成。
Objectives:As potential geothermal resources,high heat production(HHP)granites have attracted attention from countries around the world.However,the genetic links between HHP granites and hydrothermal metal deposits have not received the corresponding emphasis and reviews.Methods:Based on the detailed investigation and research of typical HHP granites and related metal deposits,we summarize the petrology and spatial-temporal distribution characteristics of HHP granites and discuss the ore-forming relationship between HHP granites and hydrothermal metal deposits.Results:High heat production(HHP)granites are enriched in radioactive heat producing elements---HPEs:U,Th,K and their heat production values are higher than or equal to 5μW/m3.HHP granites are closely related to the rare-and rare-earth metal deposits(especially W-Sn deposits)and some gold deposits that are associated with reduced intrusive rocks.HHP granites exhibit protracted differentiation with associated element enrichments and delayed heating effects,which may be conducive to the formation of long-lived magmatic-hydrothermal mineralization systems and large metal deposits.Conclusions:The HHP granites,usually assembled by multiple magma pulses,are accumulated complex with alkali-rich and low-phosphorus characteristics and most are characterized by high differentiation/evolution,which are generally associated with large to super-large hydrothermal metal deposits.
作者
冯军
张涛
黄泽
FENG Jun;ZHANG Tao;HUANG Ze(Guangxi Baise Industrial Investment and Development Group Co.Ltd.,Baise,Guangxi,533000;Langfang Integrated Natural Resources Survey Center,China Geological Survey,Langfang,Hebei,065000;School of Earth Resources,China University of Geosciences,Wuhan,430074)
出处
《地质论评》
北大核心
2025年第5期1613-1628,共16页
Geological Review
基金
国家自然科学基金青年科学基金资助项目(编号:42402083)的成果。
关键词
高产热花岗岩
高分异花岗岩
热液金属矿床
延迟加热效应
干热岩
high heat production granites(HHP granite)
highly evolved granites
hydrothermal metal deposits
delayed heating effect
hot dry rocks
作者简介
冯军,男,1983年生,博士,高级工程师,主要从事有色金属矿产勘查及矿业企业管理,Email:234693737@qq.com。;通讯作者:张涛,男,1989年生,博士后,主要从事金属矿产及其成矿规律研究,Email:nanyangxinzhuang@126.com。
