[1]孙建东,骆学全,张雪辉,等.江西省铅山县二叠纪海相火山岩锆石U-Pb年龄及Lu-Hf同位素组成[J].华东地质,2016,37(04):246.[doi:10.16788/j.hddz.32-1865/P.2016.04.002]
 SUN Jian-dong,LUO Xue-quan,ZHANG Xue-hui,et al.Zircon U-Pb age and Lu-Hf isotopic compositions of the Permian marine volcanic rocks in Qianshan County, Jiangxi Province[J].East China Geology,2016,37(04):246.[doi:10.16788/j.hddz.32-1865/P.2016.04.002]
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江西省铅山县二叠纪海相火山岩锆石U-Pb年龄及Lu-Hf同位素组成()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
37
期数:
2016年04期
页码:
246
栏目:
基础地质
出版日期:
2016-12-15

文章信息/Info

Title:
Zircon U-Pb age and Lu-Hf isotopic compositions of the Permian marine volcanic rocks in Qianshan County, Jiangxi Province
文章编号:
2096-1871(2016)04-246-06
作者:
孙建东1骆学全1张雪辉1李 胤2吕劲松1康丛轩1骆 丁2
(1 南京地质矿产研究所 南京 210016)(2 江苏省地质调查研究院 南京 210018)
Author(s):
SUN Jian-dong1 LUO Xue-quan1ZHANG Xue-hui1 LI Yin2Lü Jin-song1 KANG Cong-xuan1LUO Ding2
(1 Nanjing Institute of Geology and Mineral Resources,Nanjing 210016,China)(2 Geologoical survey of Jiangsu Province,Nanjing 210018,China)
关键词:
海相火山岩 锆石U-Pb年龄 Lu-Hf同位素 二叠纪
Keywords:
Marine volcanic rocks zircon U-Pb age Lu-Hf isotope Permian
分类号:
P534.46; P588.1
DOI:
10.16788/j.hddz.32-1865/P.2016.04.002
文献标志码:
A
摘要:
江西省铅山县中二叠统车头组硅质岩内见夹多层凝灰岩。通过研究该凝灰岩锆石U-Pb年龄及Lu-Hf同位素组成特征,探讨该区海底火山喷流活动的时间、成岩环境及成岩物源。凝灰岩的LA-ICP-MS锆石U-Pb加权平均年龄为264.8±4.4 Ma,表明其形成环境为大陆边缘拉张性台盆环境,作为直接地质证据说明这一时期存在海底火山喷发活动。凝灰岩的Lu-Hf同位素二阶段模式年龄为1170~1670Ma(平均值1320 Ma),为中元古代,代表了成岩物源可能与区域性地壳重熔增生有关。
Abstract:
Siliceousrocks of the Middle Permian Chetou Formation in Qianshan County, Jiangxi Province, are found to host several layers of tuff. By studying the zircon U-Pb age andLu-Hf isotopic compositions of tuff, this paper discussed the time of submarinevolcanic eruption, and diagenetic environment and diagenetic provenance. LA-ICP-MS zircon U-Pb weighted average age of tuff is 264.8±4.4Ma, indicating thatitformed in the extensional platform-basin environment of continental margin. This can serve as the direct proof to illustrate the occurrence of submarine volcanic eruption during this period. Two-phase Lu-Hf isotopic model age of tuff is1170~1670 Ma(average 1320 Ma), suggesting the Proterozoic age and representing that the diagenetic source may be associated with regional crustal remelting hyperplasia.

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备注/Memo

备注/Memo:
收稿日期:2016-05-09 改回日期:2016-06-17 责任编辑:谭桂丽
基金项目:中国地质调查局项目“萍乡—绍兴结合带铜多金属成矿规律研究”(项目编码:12120113065500)和“钦杭成矿带东段重点勘区攻关示范”(项目编码:1212011120846)资助。
第一作者简介:孙建东,1987年生,男,助理研究员,从事矿床地质研究工作。
更新日期/Last Update: 2016-12-21