Baddeleyite U-Pb age and whole-rock geochemical characteristics of-1670 Ma diabase dyke in the Shennongjia area: Implications for the tectonic setting of northern Yangtze Craton during the late Paleoproterozoic
文献类型：期刊论文
| 作者 | Jia, Chaoyuan4,5; Zhu, Xiyan4,5; Su, Wenbo1; Liu, Shuqi1,4; Xu, Ting1; Wang, Shiyan2; Zhao, Taiping3
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| 刊名 | PRECAMBRIAN RESEARCH
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 407页码:10 |
| 关键词 | Baddeleyite Diabase dyke Shennongjia Paleoproterozoic Yangtze Craton |
| ISSN号 | 0301-9268 |
| DOI | 10.1016/j.precamres.2024.107401 |
| 英文摘要 | The Shennongjia Group in the northern margin of the Yangtze Craton consists mainly of thick carbonate rocks interlayered with some intervals of volcanic and terrigenous clastic rocks. With the geochronological achievements in recent years, the depositional age of this group can be constrained into the time span of 1400 -1000 Ma at present, belonging to the Mesoproterozoic Ectasian period. It is also a potential candidate interval for the "Undefined System/Period " in the Regional Chronostratigraphic Chart of China. According to the 1:200,000scale conventional regional geological survey in the '1960 -1970 s ', at the northwest side of the dominant peak of the Mt. Shennongding, it shows a ring-shaped gabbro-diabase dyke intruded in these Ectasian formations. However, due to the lack of comprehensive studies, there are lots of controversy both about the intrusion time and the tectonic setting of the mafic dyke. In this study, by means of the LA-ICP-MS and SHRIMP method successfully, the baddeleyite from the Banbiyan gabbro-diabase dyke yielded gained the weighted average 207 Pb/ 206 Pb age 1668.3 +/- 5 Ma (MSWD = 1, N = 53) and 1667.8 +/- 7 Ma (MSWD = 0.7, N = 23), respectively. It represents an unambiguous late Paleoproterozoic Statherian Period magmatic event in northern Yangtze Craton. Further, for the first time, it indicates the existence of the geological records prior to - 1.67 Ga in the Shennongjia area. In addition, Banbiyan gabbro-diabase samples have relatively concentrated SiO 2 (48.33 % to 49.65 %) and high whole iron content (10.25 % to 12.78 %). They show Na 2 O + K 2 O ranging from 2.9 % to 4.64 % and TiO 2 from 1.36 % to 1.62 %. All samples are enriched in LILE, e.g., Rb, K, and Ba. The REE pattern shows a moderately right-inclined curve between E-MORB and OIB. These geochemiacal characteristics are agreed with contemporaneous magmatic event in the southwestern Yangtze Craton, indicating a within-plate rifting background and should correspond to the rifting of the Columbia Supercontinent. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001235881000001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/78540]  |
| 专题 | 中国科学院矿物学与成矿学重点实验室 |
| 通讯作者 | Zhu, Xiyan |
| 作者单位 | 1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.Henan Acad Geol, Zhengzhou 450016, Peoples R China 3.Chinese Acad Sci, Key Lab Mineral & Metallogeny, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources Res, Beijing 100029, Peoples R China 5.Univ Chinese Acad Sci, Sch Earth & Planetary Sci, Beijing 101408, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Chaoyuan,Zhu, Xiyan,Su, Wenbo,et al. Baddeleyite U-Pb age and whole-rock geochemical characteristics of-1670 Ma diabase dyke in the Shennongjia area: Implications for the tectonic setting of northern Yangtze Craton during the late Paleoproterozoic[J]. PRECAMBRIAN RESEARCH,2024,407:10. |
| APA | Jia, Chaoyuan.,Zhu, Xiyan.,Su, Wenbo.,Liu, Shuqi.,Xu, Ting.,...&Zhao, Taiping.(2024).Baddeleyite U-Pb age and whole-rock geochemical characteristics of-1670 Ma diabase dyke in the Shennongjia area: Implications for the tectonic setting of northern Yangtze Craton during the late Paleoproterozoic.PRECAMBRIAN RESEARCH,407,10. |
| MLA | Jia, Chaoyuan,et al."Baddeleyite U-Pb age and whole-rock geochemical characteristics of-1670 Ma diabase dyke in the Shennongjia area: Implications for the tectonic setting of northern Yangtze Craton during the late Paleoproterozoic".PRECAMBRIAN RESEARCH 407(2024):10. |
入库方式： OAI收割
来源：广州地球化学研究所
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