| Citation: |
Zhao Hongju, Chen Jing, Wang Bingzhang, Chen Fabin, Wang Guoliang, Song Taizhong. 2017: LA-ICP-MS zircon U-Pb dating of the Late Triassic-Early Jurassic granites in the eastern part of Qimantag area and its geological significance. Geological Bulletin of China, 36(6): 1001-1009.
|
The Late Triassic-Early Jurassic granitic assemblage in the eastern part of Qimantag area has high SiO2 content (72.18%~76.55%), high K2O content (4.08%~5.32%) and obvious negative Eu anomaly (average σEu value being 0.28).The granitic assem-blage is composed of monzogranite and syenogranite, whose ages were precisely redefined by the LA-ICP-MS zircon U-Pb meth-od, being 205.1±1.0 Ma and 199.5±1.2 Ma respectively.This granitic assemblage has close relationship with skarn-type polymetallic deposits in Lalinggaoli area.Therefore, the authors preliminarily hold that the Late Triassic-Early Jurassic granitic assemblage is proba-bly an important ore-forming magmatic formation in the eastern part of Qimantag area.
|
莫宣学, 罗照华, 邓晋福, 等.东昆仑造山带花岗岩及地壳生长[J].高校地质学报, 2007, 13 (3): 403-414. http://www.cnki.com.cn/Article/CJFDTOTAL-GXDX200703005.htm
|
|
王秉璋, 罗照华, 吴正寿, 等.祁漫塔格地质走廊域古生代—中生代火成岩岩石构造组合研究[M].北京:地质出版社, 2014:1-230.
|
|
丰成友, 王松, 李国臣, 等.青海祁漫塔格中晚三叠世花岗岩:年代学、地球化学及成矿意义[J].岩石学报, 2012, 28(2): 665-678. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201202025.htm
|
|
张爱奎, 刘光莲, 莫宣学, 等.青海祁漫塔格晚古生代—早中生代侵入岩构造背景与成矿关系[J].西北地质, 2012, 45(1):9-19. http://www.cnki.com.cn/Article/CJFDTOTAL-XBDI201201005.htm
|
|
丰成友, 李东生, 吴正寿, 等.东昆仑祁漫塔格成矿带矿床类型、时空分布及多金属成矿作用[J].西北地质, 2010, 43(4):10-17. http://www.cnki.com.cn/Article/CJFDTOTAL-XBDI201004004.htm
|
|
李怀坤, 耿建珍, 郝爽, 等.用激光烧蚀多接收器等离子体质谱仪(LA-MC-ICPMS)测定锆石U-Pb同位素年龄的研究[J].矿物学报, 2009, 28(增刊):600-601. http://www.cnki.com.cn/Article/CJFDTOTAL-KWXB2009S1311.htm
|
|
Middlemost E A K. Naming Materials in the magma/igneous rock system[J]. Earth Science Reviews, 1994, 37 (3/4): 215-224.
|
|
Rollison H R.Using geochemical data: Evalution, presentation, inter-pretation[M]. New York:Longman Scientific & Technical, 1993: 102-213.
|
|
Wright J B. A simple alkalinity ratio and its application to questions of non-orogenic granite genesis[J]. Geological Magazine, 1969, 106 (4): 370-384. doi: 10.1017/S0016756800058222
|
|
Collins W J, Beams S D, White A J R, et al. Nature and origin of A type granites with paticular reference to Southeastern Australia[J]. Contrib. Miner. Petro., 1982, 80:189-200. doi: 10.1007/BF00374895
|
|
Boynton W V. Geochemistry of the rare earth elements: meteorit-estudies[C]//Henderson P. Rare earth element geochemistry. Elser-vier, 1984:63-114.
|
|
宋忠宝, 张雨莲, 贾群子, 等.青海祁漫塔格地区野马泉花岗闪长岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J].地质通报, 2016, 35(12):2006-2013. doi: 10.3969/j.issn.1671-2552.2016.12.008
|
|
刘云华, 莫宣学, 喻学惠, 等, 东昆仑野马泉地区景忍花岗岩锆石SHRIMP U-Pb定年及其地质意义[J].岩石学报, 2006, 22(10): 2457-2463. doi: 10.3969/j.issn.1000-0569.2006.10.006
|
|
王秉璋, 王涛. 青海省东昆仑祁漫塔格火成岩类成矿作用及找矿靶区优选. 青海省地质调查院, 2011.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: