文献类型：期刊文献

英文题名：Jurassic granitoid dike in Luodian, Guizhou Province: discovery and geological significance

作者：Zhu, Mingjin Nie, Aiguo Tian, Yazhou Wang, Xinsong Sun, Jun

第一作者：Zhu, Mingjin

通信作者：Nie, AG[1]

机构：[1]Guizhou Univ, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Guiyang 550003, Peoples R China;[3]Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China

第一机构：Guizhou Univ, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2019

卷号：38

期号：1

起止页码：159-172

外文期刊名：ACTA GEOCHIMICA

收录：EI(收录号：20185206286132);Scopus(收录号：2-s2.0-85058842359);WOS:【ESCI(收录号:WOS:000455437600011)】；

基金：We sincerely thank Prof. Zhang Zhuru, Prof. Zhang Xinchun and Prof. Su Wenchao for insightful suggestions, Prof. Li Mingqin, Prof. Xie Hong and Dr. Gao Junbo for lab assistance and Dr. Huang Zhiyong and Engineer Hao Jiaxu for the fieldwork. This research was funded by grants from the National Natural Science Foundation of China (No. 41262005), high-level personnel of Guizhou Institute of Technology (No. XJGC20140702) and Talent introduction project of Guizhou University (No. 702400163301).

语种：英文

外文关键词：Jurassic granitoid dike; Geochemical characteristics; Geochronology; Luodian; Guizhou province

摘要：In this paper, the Jurassic granitoid dike that intrudes into Permian diabase was reported in Luokun, Luodian County, south Guizhou. Zircon LA-ICP-MS U-Pb dating of the granitoid dike yielded an age of 164.3 +/- 2.4Ma with the epsilon Hf(t) range from +7.8 to +12.1. The high contents of SiO2 (65.2%-66.8%) and total alkali (Na2O+K2O: 9.01%-9.95%), and low contents of Mg, Fe, Ca, P and Ti show the characteristics of alkali-rich granite. The total contents of rare earth elements range from 289.90 to 394.23ppm. The Rb, Ba, K, Th, U and other LILE, Ta, Sr, P, Ti are enriched, and heavy rare earth elements are depleted. Petrogeochemical characteristics show that the dike was derived from a partial melting of newly-grown basaltic crust, and contaminated by crustal materials before experiencing strong fractional crystallization. The dike was formed in the intraplate post-orogenic extension stage and indicates that parental magma rose to the shallow crust through a fault. This provides new evidence of tectonic and mantle-crust magmatic activities and may contribute to regional Au mineralization in southern Guizhou and neighboring areas.