NIGPAS OpenIR
Fluid inclusion Ar-40/Ar-39 geochronology of andalusite from syntectonic quartz veins: New perspectives on dating deformation and metamorphism in low-pressure metamorphic belts
Xiao, Ming1,2,3; Jiang, Yingde1,2; Zhao, Guochun3,4; Qiu, Huaning5,6; Cai, Yue7,8; Bai, Xiujuan5,6; Yuan, Chao1,2; Zhang, Wanfeng1,2; Kong, Lingzhu1,2,9; Wang, Sheng10
2022-04-15
发表期刊GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
卷号323页码:141-163
摘要

Syn-tectonic quartz veins are widely present in low- to medium-grade metapelitic belts, however, dating these veins is challenging due to the lack of suitable target minerals for most geochronological methods. Andalusite is a common K-poor aluminosilicate mineral in these quartz veins. In this study, we demonstrate the feasibility of dating fluid inclusions in andalusite using the Ar-40/Ar-39 gentle stepwise crushing technique. Three andalusite samples in syn-tectonic quartz veins from the Chinese Altai, Central Asia yielded similar gas release patterns. The first crushing steps generated significant excess Ar-40 which likely originated from secondary gas inclusions. These steps gave anomalously old and quickly declining apparent ages. The following crushing steps generated less significant excess Ar-40 and yielded concordant and well-defined Early Permian ages of 282-277 Ma. These steps were likely dominated by the degassing of intra-crystal liquid-rich fluid inclusion planes. Two of the crushed powder samples from the stepwise crushing experiments were selected for additional Ar-40/Ar-39 stepwise heating using a furnace and yielded a much younger age of 216 Ma. Laser stepwise heating of muscovite flakes in two of the investigated andalusite samples and one chloridized biotite sample from a different andalusite-bearing quartz vein yielded Ar-40/Ar-39 ages of 243-241 Ma and 214 Ma, respectively. Compared with gases released from the crushing experiments, gases extracted from the heating experiments showed distinct Cl-K-Ca compositional characteristics and younger ages with near atmospheric initial Ar-40/Ar-36 value. These observations suggest that 1) contrary to common wisdom, excess Ar-40 in K-poor nesosilicates are preferably preserved in fluid inclusions rather than mineral lattices, and 2) K (Ar) contamination from K-bearing solid phases is negligible during gentle stepwise crushing. As such, the 282-277 Ma fluid inclusion Ar-40/Ar-39 ages could be considered as the timing of andalusite growth in the quartz veins. The younger muscovite Ar-40/Ar-39 ages likely record more recent cooling events. The youngest Ar-40/Ar-39 ages of the crushed andalusite powder and the biotite sample could reflect the timing of sericitization and chloritization of the samples, which is evidenced by petrologic observations and x-ray K mapping results. Furthermore, andalusite Ar-40/Ar-39 ages agree with the monazite/zircon U-Pb ages (280-273 Ma) of syn-tectonic leucogranite and pegmatite dykes and metamorphic ages (299-262 Ma) for the low-pressure metamorphic rocks of the region. These results suggest that fluid inclusion Ar-40/Ar-39 geochronology of andalusite can be used to constrain the timing of deformation and associated metamorphism in low-pressure metapelitic terranes, which can also provide more complete pictures of the tectono-thermal evolution in combination with traditional 40Ar/39Ar stepwise heating geochronology. (C) 2022 Elsevier Ltd. All rights reserved.

关键词Andalusite Syn-tectonic quartz veins Ar-40/Ar-39 stepwise crushing Tectono-thermal evolution Metapelitic terranes
DOI10.1016/j.gca.2022.01.025
收录类别SCI
语种英语
关键词[WOS]ASIAN OROGENIC BELT ; PALEOZOIC TECTONIC EVOLUTION ; NW CHINA IMPLICATIONS ; U-PB AGE ; EXCESS AR-40 ; CONTINENTAL-CRUST ; ALTAI OROGEN ; RETROGRADE METAMORPHISM ; ACCRETIONARY WEDGE ; NORTHWESTERN CHINA
资助项目Guangdong Basic and Applied Basic Research Foundation[2019A1515012190] ; National Natural Science Foundation of China[42022017] ; National Natural Science Foundation of China[41630315] ; National Natural Science Foundation of China[41688103] ; International Partnership Program of Chinese Academy of Sciences[132744KYSB20190039] ; China Postdoctoral Science Foundation[2019M663133] ; Director?s Fund of Guangzhou Insti-tute of Geochemistry, CAS[2019SZJJ-06] ; NSF[EAR-1714892] ; GIGCAS
WOS研究方向Geochemistry & Geophysics
WOS类目Geochemistry & Geophysics
WOS记录号WOS:000831742200002
项目资助者Guangdong Basic and Applied Basic Research Foundation ; National Natural Science Foundation of China ; International Partnership Program of Chinese Academy of Sciences ; China Postdoctoral Science Foundation ; Director?s Fund of Guangzhou Insti-tute of Geochemistry, CAS ; NSF ; GIGCAS
出版者PERGAMON-ELSEVIER SCIENCE LTD
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/41083
专题中国科学院南京地质古生物研究所
通讯作者Jiang, Yingde
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
3.Univ Hong Kong, Dept Earth Sci, Pokfulam Rd, Hong Kong, Peoples R China
4.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Northern Taibai St 229, Xi'an 710069, Peoples R China
5.China Univ Geosci Wuhan, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China
6.China Univ Geosci, Sch Earth Resources, Wuhan 430074, Peoples R China
7.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
8.Lamont Doherty Earth Observ Columbia Univ, 61 Rt 9W, Palisades, NY 10964 USA
9.Univ Chinese Acad Sci, Beijing, Peoples R China
10.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Hefei 230601, Peoples R China
推荐引用方式
GB/T 7714
Xiao, Ming,Jiang, Yingde,Zhao, Guochun,et al. Fluid inclusion Ar-40/Ar-39 geochronology of andalusite from syntectonic quartz veins: New perspectives on dating deformation and metamorphism in low-pressure metamorphic belts[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2022,323:141-163.
APA Xiao, Ming.,Jiang, Yingde.,Zhao, Guochun.,Qiu, Huaning.,Cai, Yue.,...&Wang, Sheng.(2022).Fluid inclusion Ar-40/Ar-39 geochronology of andalusite from syntectonic quartz veins: New perspectives on dating deformation and metamorphism in low-pressure metamorphic belts.GEOCHIMICA ET COSMOCHIMICA ACTA,323,141-163.
MLA Xiao, Ming,et al."Fluid inclusion Ar-40/Ar-39 geochronology of andalusite from syntectonic quartz veins: New perspectives on dating deformation and metamorphism in low-pressure metamorphic belts".GEOCHIMICA ET COSMOCHIMICA ACTA 323(2022):141-163.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
1-s2.0-S001670372200(7550KB)期刊论文作者接受稿开放获取CC BY-NC-SA请求全文
个性服务
查看访问统计
谷歌学术
谷歌学术中相似的文章
[Xiao, Ming]的文章
[Jiang, Yingde]的文章
[Zhao, Guochun]的文章
百度学术
百度学术中相似的文章
[Xiao, Ming]的文章
[Jiang, Yingde]的文章
[Zhao, Guochun]的文章
必应学术
必应学术中相似的文章
[Xiao, Ming]的文章
[Jiang, Yingde]的文章
[Zhao, Guochun]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。