下庄铀矿田~(40)Ar-~(39)Ar法热液蚀变年代研究
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- 英文论文题名：Study on hydrothermal alteration ages of Xiazhuang uranium ore-field in ~(40)Ar-~(39)Ar dating method
- 论文作者：张佳 ; 刘汉彬 ; 李军杰 ; 金贵善 ; 张建峰 ; 韩娟
- 英文论文作者：ZHANG Jia ; LIU Han-bin ; LI Jun-jie ; JIN Gui-shan ; ZHANG Jian-feng ; HAN Juan ; Beijing Research Institute of Uranium Geology
- 年：2015
- 作者机构：核工业北京地质研究院;
- 论文关键词：下庄铀矿田 ; ~(40)Ar-~(39)Ar法定年 ; 热液蚀变 ; 年龄
- 英文论文关键词：Xiazhuang uranium ore-field ; ~(40)Ar-~(39)Ar dating ; hydrothermal alteration ; age
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第1册（铀矿地质分卷、铀矿冶分卷）
- 语种：中文
- 分类号：P619.14
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：256k
- 原文格式：O
- 会议级别：全国
摘要
下庄铀矿田位于粤北贵东花岗岩体内,是我国重要的花岗岩型铀矿田之一。前人已对该地区贵东岩体进行了成岩年代以及铀成矿年代研究,而对蚀变年代的研究,直接的数据结果则较少。本次工作以~(40)Ar-~(39)Ar同位素定年方法为理论基础,运用阶段升温测试技术,选择矿田内蚀变作用所形成的钾长石和白云母作为研究对象,进行了下庄铀矿田的蚀变年代特征研究。其中石土岭矿床碱交代作用所形成的蚀变矿物钾长石的~(40)Ar-~(39)Ar年龄为(144.09±0.82)Ma,太平庵断裂带断层泥中的蚀变矿物白云母~(40)Ar-~(39)Ar年龄为(140.53±1.17)Ma,此结果与基性岩脉侵入时间、成矿作用时间十分接近,为成矿作用和基性岩脉侵入密切相关研究提供了较好的时间证据。
Xiazhuang uranium ore-field is located in the Guidong granite complex in northern Guangdong province,which is one of the important granite uranium ore-fields in China.There are a great number of isotope chronology research results,which are included of many diagenetic ages and ore-forming ages,but rare alteration ages.With ~(40)Ar-~(39) Ar isotopic dating method as the theoretical basis,we have chosen alteration potash feldspars which is formed in Shituling deposit and alteration muscovite which is formed in Taipingan fault,then applied step heating technology to ensure the character of alteration ages in Xiazhuang ore-field.Through the study,we get the results that the alteration age of potash feldspars is(144.09 ± 0.82)Ma and the alteration age of muscovite is(140.53 ±1.17)Ma,which are near to basic rocks invading age and ore-forming age,this results also give a fairly good evidence for ore-forming and basic rocks invading study.
Xiazhuang uranium ore-field is located in the Guidong granite complex in northern Guangdong province,which is one of the important granite uranium ore-fields in China.There are a great number of isotope chronology research results,which are included of many diagenetic ages and ore-forming ages,but rare alteration ages.With ~(40)Ar-~(39) Ar isotopic dating method as the theoretical basis,we have chosen alteration potash feldspars which is formed in Shituling deposit and alteration muscovite which is formed in Taipingan fault,then applied step heating technology to ensure the character of alteration ages in Xiazhuang ore-field.Through the study,we get the results that the alteration age of potash feldspars is(144.09 ± 0.82)Ma and the alteration age of muscovite is(140.53 ±1.17)Ma,which are near to basic rocks invading age and ore-forming age,this results also give a fairly good evidence for ore-forming and basic rocks invading study.
引文
[1]Sun Z.X,Zhang W,Gao B.~(40)Ar/~(39)Ar dating of muscovite from the Maofeng Granite,North Guangdong Province,China[C].Goldschmidt Conference Abstract,2007.A987.
[2]张佳.下庄铀矿田成岩成矿及蚀变年代特征研究[D].北京:核工业北京地质研究院,2014.
[3]张凡,邱华宁,贺怀宇,等.~(40)Ar/~(39)Ar年代学数据处理软件ArArCALC简介[J].地球化学,2009,38(1):53-56.
[4]陈文.~(39)Ar-~(40)Ar定年技术及其在青藏高原多期地质时间年代学中的应用研究[D].北京:中国地质大学,2002.
[5]吴烈勤,谭正中,刘汝洲,等.粤北下庄矿田铀矿成矿时代探讨[J].铀矿地质,2003,19(1):28-33.
[6]李献华,胡瑞忠,饶冰.粤北白垩纪基性岩脉的年代学和地球化学[J].地球化学,1997,26(2):14-31.
[7]张展适.下庄铀矿田岩浆作用及其与铀成矿关系研究[M].北京:中国原子能出版社,2013.
[2]张佳.下庄铀矿田成岩成矿及蚀变年代特征研究[D].北京:核工业北京地质研究院,2014.
[3]张凡,邱华宁,贺怀宇,等.~(40)Ar/~(39)Ar年代学数据处理软件ArArCALC简介[J].地球化学,2009,38(1):53-56.
[4]陈文.~(39)Ar-~(40)Ar定年技术及其在青藏高原多期地质时间年代学中的应用研究[D].北京:中国地质大学,2002.
[5]吴烈勤,谭正中,刘汝洲,等.粤北下庄矿田铀矿成矿时代探讨[J].铀矿地质,2003,19(1):28-33.
[6]李献华,胡瑞忠,饶冰.粤北白垩纪基性岩脉的年代学和地球化学[J].地球化学,1997,26(2):14-31.
[7]张展适.下庄铀矿田岩浆作用及其与铀成矿关系研究[M].北京:中国原子能出版社,2013.