Citation: | ZHANG Jinming, WANG Bingzhang, XUE Wanwen, FU Yanwen, TIAN Chengxiu, LEI Xiaoqing. 2022. Zircon U-Pb geochronology, geochemistry and Hf isotopes of Shenglikou muscovite monzogranite in northern margin of Qaidam Basin[J]. Geology in China, 49(2): 620-630. doi: 10.12029/gc20220218 |
This paper is the result of geological survey engineering.
There are a large number of early Paleozoic granites distributed in the northern margin of Qaidam Basin. However, there are few research data on the existence of magmatic activities in the stage of deep subduction and early collision with the continent, which restricts the understanding of the tectonic background evolution in the northern margin of Qaidam Basin.
Zircon U-Pb geochronology, petrochemistry and Hf isotope of muscovite monzogranite in the east of Shenglikou are studied.
LA-ICP-MS zircon U-Pb dating shows that the age of muscovite monzogranite is (433 ± 6) Ma (MSWD = 0. 026), which is the product of middle Silurian magmatism. Geochemical characteristics show that the rocks are rich in silicon (SiO2=76.33%-76.99%) and alkali (K2O+Na2O=7.28%-8.19%), high K2O, K2O / Na2O>1, low Mg (MgO=0.21%-0.29%) and Mg # (Mg #=23.29-30.17), A/CNK(1.12-1.19), belonging to the strongly peraluminous calc alkaline rock series. The rocks are relatively enriched in Rb, Th, U and other large ion lithophile elements, and depleted in Nb, Ta, Ti, P and some Ba, Sr and other large ion lithophile elements (LILE). The REE distribution curve is right dipping, showing obvious negative Eu anomaly(δEu=0.32-0.63). Hf isotope of zircon εHf(t)=–5.2-–16.0, and the corresponding Hf isotopic crustal model ages TDM2=1.86-2.20 Ga.
The study of geochemistry and isotope shows that the muscovite monzogranite is S-type granite, which originated from the remelting and reconstruction of Paleoproterozoic crust. Based on the comprehensive comparison of the formation age of muscovite monzogranite and the regional high-pressure ultra-high pressure metamorphic age, combined with the study of petrochemistry and isotope, it is considered that the muscovite monzogranite in the east of Shenglikou was formed in the collision stage of the high-pressure ultra-high pressure metamorphic belt in the northern margin of Qaidam Basin.
Anderson T. 2002. Correction of commonleadin U-Pb analyses that donotre port 204Pb[J]. Chemical Geology, 192(1/2): 59-79. |
Chen Danling, Sun Yong, Liu Liang. 2007. The metamorphic ages of the country rock of the Yukahe eclogites in the North Qaidam and its geological significance[J]. Earth Science Frontiers, 14(1): 108-116(in Chinese with English abstract). doi: 10.1016/S1872-5791(07)60005-0 |
Chen Nengsong, Gong S L, Sun M, Li X Y, Xia X P, Wang Q Y, Wu F Y, Xu P. 2009. Precambrian evolution of the Quanji Block, northeastern margin of Tibet: In sights from zircon U-Pb and Lu-Hf isotopecom positions[J]. Journal of Asian Earth Sciences, 35: 367-376. doi: 10.1016/j.jseaes.2008.10.004 |
Hu Nenggao, Wang Xiaoxia, Sun Yangui, Lin Wei. 2008. Petrography and geochemistry of the Tataleng rapakivi graniteon the northern margin of the Qaidam basin, northwestern China[J]. Geological Bulletin of China, 27(11): 1923-1932(in Chinese with English abstract). |
Li Huaikun, Lu Songnian, Wang Huichu. 2003. Quanji Group—the geological record of the Rodinia supercontinent break-up in the early Neoproterozoi cpreserved in the northern Qaidam margin, Qinghai, Northwest China [J]. Geological Survey and Research, 26(1): 27-37(in Chinese with English abstract). |
Li Xianhua, Li Wuxian, Li Zhengxiang. 2007. Further discussion on genetic types and tectonic significance of early Yanshanian granites in Nanling [J]. Chinese Science Bulletin, 52 (9): 981-991(in Chinese). doi: 10.1360/csb2007-52-9-981 |
Lu Songnian, Wang Huichu, Li Huaikun, Yuan Guibang, Xin Houtian, Zheng Jiankang. 2002. Redefinition of the"Dakendaban Group"on the northern margin of the Qaidam basin[J]. Geological Bulletin of China, 21(1): 19-23(in Chinese with English abstract). |
Lu Songnian, Li Huaikun, Chen Zhihong. 2004. Late Mesoproterozoic-Early Neoproterozoic evolution of the Qinling orogen[J]. Geological Bulletin of China, 23(2): 107-112(in Chinese with English abstract). |
Meng Fancun, Zhang Jianxin, Yang Jingsui. 2005. Tectono-thermal event of post HP/ UHP metamorphism in the Xitieshan area of the North Qaidam Mountains, western China: Isotopic and geochemical evidence of granite and gneiss [J]. Acta Petrologica Sinica, 21(1): 45-56(in Chinese with English abstract). |
Qinghai Institute of Geological Survey. 2003. J46E013020(Lüliangshan)range, J46E013021(Yikechaidamu)range 1: 50000 Regional Geological Survey Report(in Chinese with English abstract). |
Ren Junhu. 2010. A Study on Tectonic Evolution during the Period of Nanhua to Devonian at the North And South of Qaidam Basin[D]. Xi'an: Northwest University(in Chinese with English abstract). |
Song Shuguang, Yang Jingsui. 2001. Sanidine quartz inclusions in Dulan eclogites: Evidence for UHP met amorphism on the north margin of the Qaidam basin [J]. Acta Geologica Sinica, 75(2): 180-185(in Chinese with English abstract). |
Song Shuguang, Zhang Lifei, Niu Yaoling. 2007. Two types of peridotite in continental orogenic beltsa case study fromthe North Qaidam UHP metamorphic belt[J]. Earth Science Frontiers, 14(2): 129-138(in Chinese with English abstract). |
Song Shuguang, Zhang Cong, Li Xianhua. 2011. HP/UHP metamorphic time of eclogite in the Xitieshan terrane, North Qaidam UHPM belt, NW China[J]. Acta Petrologica Sinica, 27(4): 1191-1197(in Chinese with English abstract). |
Wu Cailai, Yang Jigsui, Wooden J L. 2004. Zircon SHRIMP dating of the Yematan granite, Dulan, North Qaidam[J]. Chinese Science Bulletin, 49(16): 1667-1672(in Chinese with English abstract). doi: 10.1007/BF03184297 |
Wu Cailai, Gao Yuanhong, Wu Suoping. 2008. Zircon SHRIMP ages and geochemistry of granite Qaidam[J]. Science in China (Ser. D), 38(8): 930-949(in Chinese with English abstract). |
Wu Cailai, Gao Yuanhong, Li Zhaoli. 2014. Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP Belt, NW China[J]. Science China: Earth Science, 57: 2945-2965(in Chinese with English abstract). doi: 10.1007/s11430-014-4958-5 |
Wu Fuyuan, Li Xianhua, Zheng Yongfei. 2007. Lu-Hf isotopic systematics and their applications in petrology[J]. Acta Petrologica Sinica, 23(2): 185-220(in Chinese with English abstract). |
Yang Jinsui, Xu Zhiqing, Li Haibin. 1998. Discovery of eclogite at northern margin of Qaidam basin, NW China[J]. Chinese Science Bulletin, 43: 1544-1549(in Chinese) |
Yang Jingsui, Xu Zhiqin, Song Shuguang. 2000. Discovery of eclogite in Dulan, Qinghai Province and its significance for studying the HP-UHP metamorphic belt along the central orogenic belt of China[J]. Acta Geologica Sinica, 74(2): 156-168(in Chinese with English abstract). |
Yang Jinsui, Song Shuguang, Xu Zhiqing. 2001. Discovery of coesite in the north Qaidam Early Paleozoic ultrahighpressure(UHP-HP) metamorphic belt, NW China[J]. Acta Geologica Sinica, 75(2): 175-179(in Chinese with English abstract) |
Yang Jinsui, Zhang Jianxin, Meng Fancun. 2003. Ult rahigh pressure eclogites of the North Qaidam and Altun mountains, NW China and their protoliths [J]. Earth Science Frontiers, 10(3): 291-314(in Chinese with English abstract). |
Zhang Guibin, Zhang Lifei, Song Shuguang. 2012 An overview of the tectonic evolution of North Qaidam UHPM Belt: From oceanic subduction to continental collision[J]. Geological Journal of China Universities, 18(1): 28-40(in Chinese with English abstract). |
Zhang Jianxin, Yang Jinsui, Meng Fancun. 2005. Twocon trasting eclogites cooling histories, North Qaidam HP/UHP terrane, western China: Petrological and isotopic constraints[J]. Lithos, 84: 51-57. doi: 10.1016/j.lithos.2005.02.002 |
Zhang Linfen, Lu Zhong, Zhang Guibin. 2008. The geological charateristics of oceanic-type UHP metamorphic belts and their tectonic implications: Case studies from Southwest Tianshan and North Qaidam in NW China [J]. Chinese Science Bulletin, 53(20): 3120-3130. |
Zhang Yanjun, Sun Fengyue, Xu Chenghan, Yu Lu. 2016. Geochronology, geochemistry and zircon Hf isotopes of the Tanjianshan granite porphyry intrusion in Dachaidan Area of the North Margin of Qaidam Basin[J]. Earth Science, 41(11): 1830-1844(in Chinese with English abstract). |
Zhong Jun, Hu Chaonan, Fan Honghai, Cai Yuqi, Chen Qing, Chen Jinyong, MengYanning. 2019. A new type U-Th-REE-Nb mineralization related to albitite: A case study from the Chachaxiangka deposit in the northeastern Qaidam Basin of China[J]. China Geology, 2: 422-438. |
Zhou Bin, Zheng Youye, Xu Rongke, Wang Yongkai, Zhang Xiaopen, Wu Liang. 2013. LA-ICP-MS zircon U-Pb dating and Hf isotope geochemical characteristics of Qaidamshan intrusive body[J]. Geological Bulletin of China, 32(7): 1027-1034(in Chinese with English abstract). |
Zhu Xiaohui, Chen Danling, Liu Liang, Wang Chao, Yang Wenqiang, Cao Yuting, Kang Lei. 2013. Geochemistry geochronology and Hf isotopic compositions of the Tuanyushan pluton from the western segment of the northern Qaidam[J]. Geological Journal of China Universities, 19(2): 233-244(in Chinese with English abstract). |
陈丹玲, 孙勇, 刘良. 2007. 柴北缘鱼卡河榴辉岩围岩的变质时代及其地质意义[J]. 地学前缘, 14(1): 108-116 doi: 10.3321/j.issn:1005-2321.2007.01.010 |
胡能高, 王晓霞, 孙延贵, 林伟, 申文环, 陈运杰. 2008. 柴达木盆地北缘塔塔楞环斑花岗岩的岩相学和地球化学特征[J]. 地质通报, 27(11): 1923-1932. doi: 10.3969/j.issn.1671-2552.2008.11.023 |
李怀坤, 陆松年, 王惠初, 相振群, 郑建康. 2003. 青海柴北缘新元古代超大陆裂解的地质记录——全吉群[J]. 地质调查与研究, 26(1): 27-37. doi: 10.3969/j.issn.1672-4135.2003.01.006 |
李献华, 李武显, 李正祥. 2007. 再论南岭燕山早期花岗岩的成因类型与构造意义[J]. 科学通报, 52(9): 981-991. doi: 10.3321/j.issn:0023-074X.2007.09.001 |
陆松年, 王惠初, 李怀坤, 袁桂邦, 辛后田, 郑健康. 2002. 柴达木盆地北缘"达肯大坂群"的再厘定[J]. 地质通报, (21): 19-23. |
陆松年, 陈志宏, 李怀坤. 2004. 秦岭造山带中—新元古代(早期)地质演化[J]. 地质通报, (2): 107-112 doi: 10.3969/j.issn.1671-2552.2004.02.002 |
孟繁聪, 张建新, 杨经绥. 2005. 柴北缘锡铁山早古生代HP/UHP变质作用后的构造热事件——花岗岩和片麻岩的同位素与岩石地球化学证据[J]. 岩石学报, 21(1): 45-56. |
青海省地质调查院. 2003. J46E013020(绿梁山)幅、J46E013021(依克柴达木湖)幅1: 5万区域地质调查报告. |
任军虎. 2010. 柴达木盆地南、北缘南华—泥盆纪构造演化: 博士学位论文[D]. 西安: 西北大学. |
宋述光, 杨经绥. 2001. 柴达木盆地北缘都兰地区榴辉岩中透长石+石英包裹体: 超高压变质作用的证据[J]. 地质学报, 75(2): 180-185. doi: 10.3321/j.issn:0001-5717.2001.02.006 |
宋述光, 张立飞, 牛耀龄, 张贵宾. 2007. 大陆碰撞造山带的两类橄榄岩——以柴北缘超高压变质带为例[J]. 地学前缘14(2): 129-138. doi: 10.3321/j.issn:1005-2321.2007.02.010 |
宋述光, 张聪, 李献华, 张立飞. 2011. 柴北缘超高压带中锡铁山榴辉岩的变质时代[J]. 岩石学报, 27(4): 1191-1197. |
吴才来, 杨经绥, Wooden J L, Shi R D, Chen S Y, Meibom A, Mattinson C G. 2004. 柴达木北缘都兰野马滩花岗岩锆石SHRIMP定年[J]. 科学通报, 49(16): 1667-1672 doi: 10.3321/j.issn:0023-074X.2004.16.014 |
吴才来, 郜源红, 吴锁平, 陈其龙. 2008. 柴北缘西段花岗岩锆石SHRIMP U-Pb定年及其岩石地球化学特征[J]. 中国科学: 地球科学, 38(8): 930-949. |
吴才来, 郜源红, 李兆丽, 雷敏, 秦海鹏, 李名则, 刘春花. 2014. 都兰花岗岩锆石SHRIMP定年及柴北缘超高压带花岗岩年代学格架[J]. 中国科学: 地球科学, 44(10): 2142-2159. |
吴福元, 李献华, 郑永飞, 高山. 2007. Lu-Hf同位素体系及其岩石学应用[J]. 岩石学报, 23(2): 185-220. |
杨经绥, 许志琴, 李海兵. 1998. 柴北缘地区榴辉岩的发现及潜在的地质意义[J]. 科学通报, 43(14): 1544-1549. doi: 10.3321/j.issn:0023-074X.1998.14.023 |
杨经绥, 许志琴, 宋述光, 吴才来, 史仁灯, 张建新, 万渝生, 李海兵, 金小赤. 2000. 青海都兰榴辉岩的发现及对中国中央造山带内高压—超高压变质带研究的意义[J]. 地质学报, 74(2): 156-168. |
杨经绥, 宋述光, 许志琴, 吴才来, 史仁灯, 张建新, 李海兵, 万渝生, 刘焰, 邱海峻, 刘福来. 2001. 柴北缘早古生代高压—超高压变质带中发现典型的超高压矿物——柯石英[J]. 地质学报, 75(2): 175-179. |
杨经绥, 张建新, 孟繁聪, 史仁灯, 吴才来, 许志琴, 李海兵, 陈松永. 2003. 中国西部柴北缘—阿尔金的超高压变质榴辉岩及其原岩性质探讨[J]. 地学前缘, 10(3): 291-314. doi: 10.3321/j.issn:1005-2321.2003.03.026 |
张贵宾, 张立飞, 宋述光. 2012. 柴北缘超高压变质带: 从大洋到大陆的深俯冲过程[J]. 高校地质学报, 18(1): 28-40. doi: 10.3969/j.issn.1006-7493.2012.01.003 |
张延军, 孙丰月, 许成瀚, 禹禄. 2016. 柴北缘大柴旦滩间山花岗斑岩体锆石U-Pb年代学、地球化学及Hf同位素[J]. 地球科学, 41(11): 1830-1844. |
周宾, 郑有业, 许荣科, 王永开, 张小鹏, 吴亮. 2013. 青海柴达木山岩体LA-ICPMS锆石U-Pb定年及Hf同位素特征[J]. 地质通报, 32(7): 1027-1034. doi: 10.3969/j.issn.1671-2552.2013.07.008 |
朱小辉, 陈丹玲, 刘良, 王超, 杨文强, 曹玉亭, 康磊. 2013. 柴北缘西段团鱼山岩体的地球化学、年代学及Hf同位素示踪[J]. 高校地质学报, 19(2): 233-244. doi: 10.3969/j.issn.1006-7493.2013.02.008 |
Tectonic map (a) and geological map of Shenglikoudong area (b) (after Qinghai Institute of Geological Survey, 2003)
Outcrop (a) and microscopic characteristics (b) of muscovite monzogranite in Shenglikoudong area
CL images of muscovite monzogranite in Shenglikoudong area
U-Pb concordia diagrams and weighted plot of muscovite monzogranite in Shenglikoudong area
SiO2-K2O diagramd(after Le Maitre, 2002)
Chondrite-normalized REE patterns (normalized data after Sun and McDonough, 1989)
Webdiagram of metamorphic intrusive rock (normalized data after Sun and McDonough, 1989)
Hf-Ta-Rb diagram (after Peace, 1984)
R1-R2 diagram (after Batchelor, 1985)