[1]刘道荣,杨海翔.浙西北岩前岩体与芙蓉岩体同源性分析及萤石找矿意义[J].华东地质,2018,39(01):18-25.[doi:10.16788/j.hddz.32-1865/P.2018.01.003]
　LIU Dao-rong,YANG Hai-xiang.Comagmatic relation between the Yanqian and Furong granites in northwestern Zhejiang Province and its significance to prospecting fluorite deposits[J].East China Geology,2018,39(01):18-25.[doi:10.16788/j.hddz.32-1865/P.2018.01.003]
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浙西北岩前岩体与芙蓉岩体同源性分析及萤石找矿意义()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
39
期数:
2018年01期
页码:
18-25
栏目:
基础地质
出版日期:
2018-03-15

文章信息/Info

Title:
Comagmatic relation between the Yanqian and Furong granites in northwestern Zhejiang Province and its significance to prospecting fluorite deposits
文章编号:
2096-1871(2018)01-018-08
作者:
刘道荣1; 杨海翔2
(1. 中化地质矿山总局浙江地质勘查院,杭州 310002; 2. 浙江省地球物理地球化学勘查院,杭州 310005)
Author(s):
LIU Dao-rong1; YANG Hai-xiang2
(1. Zhejiang Geological Prospecting Institute of China Chemical Geology and Mineral Bureau,Hangzhou 310002,China; 2. Geophysical and Geochemical Exploration Institution of Zhejiang Province,Hangzhou 310005,China)
关键词:
同源性;  “常山式”萤石矿床;  芙蓉岩体;  岩前岩体;  浙西北
Keywords:
co-genesis;  “Changshan-type” fluorite deposit;  Furong granite;  Yanqian granite;  northwestern Zhejiang Province
分类号:
中图分类号:P591
DOI:
10.16788/j.hddz.32-1865/P.2018.01.003
文献标志码:
A
摘要:
浙西北八面山一带寒武系碳酸盐岩中广泛发育燕山期中、酸性岩体,其中岩前岩体为重要的萤石矿成矿岩体。研究表明,岩前岩体与芙蓉岩体均为二长花岗岩,它们的岩石地球化学特征具有相似性,F含量较高(≥0.36%),球粒陨石标准化稀土元素配分曲线基本一致,Eu亏损明显(δEu为0.01～0.07),表明二者为同源岩浆活动的产物。地球物理特征表明,岩前岩体与芙蓉岩体在深部相连,为同一岩体。利用RGIS软件,采用2.5D人机交互反演法计算岩前岩体与芙蓉岩体的顶面埋深,结果表明两岩体间的隐伏部分顶面埋深约900～1 200 m。目前,已在岩前岩体南侧外接触带碳酸盐岩中发现数个“常山式”大、中型萤石矿床,但在岩前岩体东侧及芙蓉岩体北侧尚未有重大突破。岩前岩体与芙蓉岩体具有同源性的认识,对于指导该地区萤石找矿工作具有重要意义。
Abstract:
The Yanshanian intermediate-acidic intrusive rocks are distributed widely in Cambrian carbonate strata in the Bamianshan area, northwestern Zhejiang Province. Yanqian granite is one of the most important fluorite-forming intrusions. The study shows that the Yanqian granite and adjacent Furong granite are monzonitic granite, both of which have similar petrogeochemical features, such as higher F contents(more than 0.36%). The similar chondrite-normalized REE distribution patterns and obvious negative Eu anomalies(δEu=0.01～0.07)suggest that they were the products of cognate magmatic activity. Geophysical survey displays that they are connected in the deep and should be derived from the same intrusion. 2.5D computer interaction inversion calculation by RGIS software shows that the hidden superface depths of the Yanqian and Furong granites range from 900 to 1 200 m. Currently, several large-to medium-sized “Changshan-type” fluorite deposits have been found along the outer contact zones of carbonate strata around the southern Yanqian granite, but there have been no major prospecting discoveries made on the northern side of the Furong granite and the eastern side of the Yanqian granite. The understanding of co-magmatic relation between the Yanqian granite and Furong granite is of important significance to prospecting fluorite deposits in the study area.

参考文献/References:

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备注/Memo

备注/Memo:
*收稿日期:2017-04-27 修订日期:2017-06-09 责任编辑:谭桂丽
基金项目:浙江省地质勘查资金“浙江省常山县芳村地区铅、锌多金属矿资源调查评价(编号:[省资]2010003)”和“常山里山岭—衢江仙洞地区区域物化探调查(编号:[省资]2012003)”项目联合资助。
第一作者简介:刘道荣,1982年生,男,高级工程师,主要从事矿产地质勘查研究。
更新日期/Last Update: 2018-03-28