江西赣南新元古代沙坝黄组火山活动记录：岩石学、岩石地球化学、锆石U-Pb年代学证据
Evidences on Petrology, Lithogeochemistry and Zircon U-Pb Chronology: Volcanism Records in Neoproterozoic Shabahuang Formation in Southern Jiangxi
摘要: 1:5万仙下幅区域地质调查在江西于都县沙坝黄组底部发现一套似层状或透镜状的变流纹质熔结凝灰岩，其为造山晚期陆相裂隙式火山喷发，浅海陆棚边缘斜坡水下结晶形成。通过采集变流纹质熔结凝灰岩同位素年龄样，采用锆石(LA-ICPMS) U-Pb定年法获得加权平均年龄值为744 ± 5 Ma，显示沙坝黄组地层形成时代为南华纪早世，改变了以往普遍认为沙坝黄组地层形成时代为南华纪中–晚世的认识。
Abstract: A set of stratoid or lenticular metamorphosed rhyolitic welded tuff was identified out in the re-gional geology survey of 1:50,000 Xianxiao Sheet, which was formed from continental fissure type volcanic eruption of late-orogenic and underwater crystallization on a marginal slope of neritic shelf. A 744 ± 5 Ma weighted mean age of isotopic age samples collected from the me-tamorphosed rhyolitic welded tuff, obtained by zircon (LA-ICPMS) U-Pb method dating, shows Shabahuang Formation was in Early Epoch of Nanhua Period, having changed the recognition that Shabahuang Formation was widely believed to be formed in Middle-Late Epoch of Nanhua Period.
文章引用：张永忠, 刘高峰. 江西赣南新元古代沙坝黄组火山活动记录：岩石学、岩石地球化学、锆石U-Pb年代学证据[J]. 地球科学前沿, 2019, 9(3): 138-147. https://doi.org/10.12677/AG.2019.93017

参考文献

[1] 张芳荣, 吴富江, 黄新曙. 赣中南新元古代潭头群变质沉积岩物源及构造背景[J]. 东华理工大学学报(自然科学版), 2009, 32(2): 134-140.
[2] 周博文, 曾国丰, 徐文坦, 等. 赣南地区早南华世钾质斑脱岩的发现及其大地构造意义[J]. 地质学刊, 2018, 42(1): 95-107.
[3] 李献华, 兰中伍. 新元古代—寒武纪高精度同位素地质年代学[J]. 科技创新导报, 2016(23): 183-186.
[4] 霍海龙, 张达, 吴淦国, 等. 赣东北景德镇双桥山群火山碎屑凝灰岩锆石U-Pb年龄及Hf同位素特征[J]. 矿物岩石地球化学通报, 2018(1): 103-110.
[5] 王涛, 王宗起, 王东升, 等. 江西武功山地区老虎塘组碎屑锆石U-Pb年龄和Hf同位素: 沉积时代厘定及其源区特征[J]. 地球学报, 2018, 39(2): 167-178.
[6] 孙建东, 张雪辉, 吕劲松, 等. 江西金山矿田罗家墩金矿地球化学、锆石U-Pb年龄及地质意义[J]. 矿产勘查, 2018, 9(3): 293-304.
[7] 高林志, 丁孝忠, 庞维华, 等. 中国中一新元古代地层年表的修正——锆石U—Pb年龄对年代地层的制约[J]. 地层学杂志, 2011, 35(1): 1-7.
[8] 杨明桂, 刘亚光, 黄志忠,等. 江西中新元古代地层的划分及其与邻区对比[J]. 中国地质, 2012, 39(1): 43-53.
[9] 张建梅, 吴富江, 王迪文, 等. 西武夷山地区变质地层的划分与构造环境研究[C]. 华东地区地质调查项目成果集(2006-2010).
[10] 江西省地质矿产厅. 江西省岩石地层[M]. 武汉: 中国地质大学出版社, 1997.
[11] Yuan, H.L., Gao, S., Liu, X.M., et al. (2004) Accurate U-Pb Age and Traceelement Determinations of Zircon by Laser Ablation-Inductively Coupledplasma Mass Spectrometry. Geoanalytical and Geostandard Research, 28, 353-370. [Google Scholar] [CrossRef] 
[12] Wedepohl, K.H. (1995) The Composition of the Continental Crust. Geochim et Cosmochim Acta, 59, 1217-1232. [Google Scholar] [CrossRef] 
[13] Sun, S.S. and Mcdonough, W.F. (1989) Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Composition and Processes. Geological Society of London Special Publications, 42, 313-345. [Google Scholar] [CrossRef] 
[14] Pearce, J.A. (1996) Sources and Setting of Granitic Rocks. Episodes, 19, 120-125.