| Citation: |
ZHANG Xinyuan, LI Wufu, OUYANG Guangwen, WANG Chuntao, CHEN Haiqing. The discovery of Early Triassic volcanic rocks in Zhanhongshan area of Qinghai Province in the eastern section of East Kunlun Mountain and its geological significance[J]. Geological Bulletin of China, 2020, 39(5): 631-641.
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The discovery of Early Triassic volcanic rocks in Zhanhongshan area of Qinghai Province in the eastern section of East Kunlun Mountain and its geological significance
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Abstract
During 1:25000 regional geological and mineral resources survey in Zhanhongshan area of Gouli Township, Dulan Country, Eastern Kunlun Mountain, conducted by the authors, a set of Early Triassic volcanic rocks was mapped.The rocks consist mainly of a set of acidic volcanic rocks with local limestone assemblage, characterized by marine eruption.The main elements of volcanic rocks suggest weakly peraluminous rocks such as medium-K to high-K calc-alkaline series, assuming LREE-enriched pattern.The REE distribution pattern shows medium Eu anomaly, enrichment of LILE K, Rb, Ba and Th and depletion of HFSE Ti, Nb and Ta.The tectonic environment shows characteristics of island arc volcanic rocks.The zircon LA-ICP-MS U-Pb age of rhyolite is 244.1±1.8 Ma.It is believed that the volcanic rocks were formed in the Early Triassic.Combined with regional tectonic evolution of East Kunlun, it is considered that the acidic volcanic rocks in the Zhanhongshan area were associated with large-scale island-arc granites in the eastern part of East Kunlun, and they were formed by magmatic activity during the northward subduction of the Early Triassic in Animaqin of Paleo-Tethys Ocean.It seems to be a fine example of volcanic activity during the Late Permian to Early Triassic in the East Kunlun area after the discovery and establishment of the Late Permian Dazaohuo Formation in the middle part of the East Kunlun Mountain.
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References
[1] 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. doi: 10.3969/j.issn.1006-7493.2007.03.010 [2] Yu M, Feng C Y, Santosh M, et al.The Qiman Tagh Orogen as a window to the crustal evolution in northern Qinghai-Tibet Plateau[J].Earth-Science Reviews, 2017, 167:103-123. doi: 10.1016/j.earscirev.2017.02.008 [3] 王秉璋, 罗照华, 李怀毅, 等.东昆仑祁漫塔格走廊域晚古生代-早中生代侵入岩岩石组合及时空格架[J].中国地质, 2009, 36(4):769-782. doi: 10.3969/j.issn.1000-3657.2009.04.003 [4] 潘桂棠, 李兴振, 王立全, 等.青藏高原及邻区大地构造单元初步划分[J].地质通报, 2002, 21(11):701-707. doi: 10.3969/j.issn.1671-2552.2002.11.002 [5] 潘桂棠, 肖庆辉, 陆松年, 等.中国大地构造单元划分[J].中国地质, 2009, 36(1):2-28. [6] 青海省地质矿产局.青海省岩石地层[M].武汉:中国地质大学出版社, 1997:1-340. [7] 肖序常, 李廷栋.青藏高原的构造演化与隆升机制[M].广州:广东科技出版社, 2000:1-240. [8] 许志琴, 杨经绥, 李海兵, 等.青藏高原与大陆动力学——地体拼合、碰撞造山及高原隆升的深部驱动力[J].中国地质, 2006, 33(2):221-238. [9] 殷鸿福, 张克信.东昆仑造山带的一些特点[J].地球科学, 1997, 22(4):339-342. doi: 10.3321/j.issn:1000-2383.1997.04.001 [10] 史连昌, 常革红, 祁生胜, 等.东昆仑大灶火沟-万宝沟晚二叠世陆缘弧火山岩的发现及意义[J].地质通报, 2016, 35(7):1115-1122. doi: 10.3969/j.issn.1671-2552.2016.07.007 [11] 李碧乐, 孙丰月, 于晓飞, 等.东昆中隆起带东段闪长岩U-Pb年代学和岩石地球化学研究[J].岩石学报, 2011, 28(4):1163-1172. [12] 马昌前, 熊富浩, 尹烁, 等.造山带岩浆作用的强度和旋回性:以东昆仑古特提斯花岗岩类岩基为例[J].岩石学报, 2015, 31(12):3555-3568. [13] 祁晓鹏, 范显刚, 杨杰, 等.东昆仑东段浪木日上游早古生代榴辉岩的发现及其意义[J].地质通报, 2016, 35(11):1771-1783. doi: 10.3969/j.issn.1671-2552.2016.11.002 [14] 魏博.东昆中构造带(东段)蛇绿岩与岛弧型侵入岩地质特征及构造属性研究[D].长安大学硕士学位论文, 2015: 1-132. http://cdmd.cnki.com.cn/Article/CDMD-10710-1015802561.htm [15] 祁晓鹏, 杨杰, 范显刚, 等.东昆仑东段东昆中构造混杂岩带长石山蛇绿岩年代学、地球化学特征及其构造意义[J].中国地质, 2016, 43(3):797-816. [16] Middlemost EAK.Naming materials in the magma/igneous rock system[J].Earth Science Reviews, 1994, 37:215-224. doi: 10.1016/0012-8252(94)90029-9 [17] LeMartre R W, Bateman P, Dudek A, et al.A classification of igneous rocks and glossary of terms[C]//Recommendation of the IUGS subcommission on the systematics of igneous rocks.Oxford: Blackwell, 1989. https://www.researchgate.net/publication/284411510_A_classification_of_igneous_rocks_and_glossary_of_terms [18] Irvine T N, Baragar W R A.A guide to the chemical classification of the common volcanic rocks[J].Canadian Journal of Earth Sciences, 1971, 8(5):523-548. doi: 10.1139/e71-055 [19] Peccerillo R, Taylor R S R.Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey[J].Contributions to Mineralogy & Petrology, 1976, 58(1):63-81. [20] Maniar P D, Piccoli P M.Tectonic discrimination of granitoids[J].Geological Society of America Bulletin, 1989, 101(5):635-643. doi: 10.1130/0016-7606(1989)101<0635:TDOG>2.3.CO;2 [21] Boyonton W V.Cosmochemistry of the rare earth elements:Meteoric studies[J].Rare Earth Element Geochemistry, 1984, 2:63-114. doi: 10.1016/B978-0-444-42148-7.50008-3 [22] Sun S S, Mcdonough W F.Chemical and isotopic systematics of oceanic basalts:Implications for Mantle composition and processes[J].Geological Society London Special Publications, 1989, 42(1):313-345. doi: 10.1144/GSL.SP.1989.042.01.19 [23] Liu Y S, Gao S, Hu Z C, et al.Continental and oceanic crustrecy-cling-incluced melt-peridoite interactions in the Trans-North China Orogen:U-Pb dating, Hf isotopes and trace element in zir-con from mantle xenoliths[J].Journal of Petrology, 2010, 51(1/2):537-571. [24] Ludwig K R.Isoplot/Ex version 2.49.A Geochronological Toolkit for Microsoft Excel[M].Berkeley:Berkeley Geochronology Center Special Publication No.1a, 2003:1-56. [25] 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, 29(s1):600-601. [26] 闫义, 林舸, 李自安.利用锆石形态、成分组成及年龄分析进行沉积物源区示踪的综合研究[J].大地构造与成矿学, 2003, 27(2):184-190. doi: 10.3969/j.issn.1001-1552.2003.02.012 [27] 吴元保, 郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报, 2004, 49(16):1589-1604. doi: 10.3321/j.issn:0023-074X.2004.16.002 [28] Pearce J A, Harris N B W, Tindle A G.Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J].Journal of Petrology, 1984, 25:956-983. doi: 10.1093/petrology/25.4.956 [29] 姜春发, 杨经绥, 冯秉贵.昆仑开合构造[M].北京:地质出版社, 1992. [30] 殷鸿福, 张克信.中央造山带的演化及其特点[J].地球科学, 1998, 23(5):437-442. [31] 罗照华, 邓晋福, 曹永清, 等.青海省东昆仑地区晚古生代-早中生代火山活动与区域构造演化[J].现代地质, 1999, (1):51-56. [32] 郭正府, 邓晋福, 许志琴, 等.青藏东昆仑晚古生代末-中生代中酸性火成岩与陆内造山过程[J].现代地质, 1998, (3):344-352. [33] Yang J S, Robinson P T, Jiang C F, et al.Ophiolites of the Kunlun Mountains, China and their tectonic implications[J].Tectonophysics, 1996, 258(1/4):1-231. [34] 杨经绥, 许志琴, 李海兵, 等.东昆仑阿尼玛卿地区古特提斯火山作用和板块构造体系[J].岩石矿物学杂志, 2005, 24(5):369-380. doi: 10.3969/j.issn.1000-6524.2005.05.004 [35] 孙雨, 裴先治, 丁仨平, 等.东昆仑哈拉尕吐岩浆混合花岗岩:来自锆石U-Pb年代学的证据[J].地质学报, 2009, 83(7):1000-1010. doi: 10.3321/j.issn:0001-5717.2009.07.008 [36] 熊富浩, 马昌前, 张金阳, 等.东昆仑造山带早中生代镁铁质岩墙群LA-ICP-MS锆石U-Pb定年、元素和Sr-Nd-Hf同位素地球化学[J].岩石学报, 2011, 27(11):3350-3364. [37] 熊富浩, 马昌前, 张金阳, 等.东昆仑造山带白日其利辉长岩体LA-ICP-MS锆石U-Pb年龄及地质意义[J].地质通报, 2011, 30(8):1196-1202. doi: 10.3969/j.issn.1671-2552.2011.08.003 [38] 许志琴, 杨经绥, 李海兵, 等.造山的高原——青藏高原的地体拼合、碰撞造山及隆升机制[M].北京:地质出版社, 2007. [39] 王学良.东昆仑东段香加南山花岗岩体地质特征及其形成年代研究[D].长安大学硕士学位论文, 2012: 1-86. http://cdmd.cnki.com.cn/Article/CDMD-10710-1013018790.htm [40] 陈国超.东昆仑造山带(东段)晚古生代-早中生代花岗质岩石特征、成因及地质意义[D].长安大学博士学位论文, 2014: 1-182. http://cdmd.cnki.com.cn/Article/CDMD-10710-1014070097.htm [41] 熊富浩.东昆仑造山带东段古特提斯域花岗岩类时空分布、岩石成因及其地质意义[D].中国地质大学博士学位论文, 2014: 1-191. http://cdmd.cnki.com.cn/Article/CDMD-10491-1014340842.htm [42] 李金超, 贾群子, 杜玮, 等.东昆仑东段阿斯哈矿床石英闪长岩LA-ICP-MS锆石U-Pb定年及岩石地球化学特征[J].吉林大学学报(地球科学版), 2014, 44(4):1188-1199. [43] 岳维好, 周家喜.青海都兰县阿斯哈石英闪长岩岩石地球化学、锆石U-Pb年龄与Hf同位素特征[J].地质通报, 2019, 38(2/3):328-338. [44] 南卡俄吾, 贾群子, 李文渊, 等.青海东昆仑哈西亚图铁多金属矿区石英闪长岩LA-ICP-MS锆石U-Pb年龄和岩石地球化学特征[J].地质通报, 2014, 33(6):841-849. doi: 10.3969/j.issn.1671-2552.2014.06.007 [45] 南卡俄吾, 贾群子, 唐玲, 等.青海东昆仑哈西亚图矿区花岗闪长岩锆石U-Pb年龄与岩石地球化学特征[J].中国地质, 2016, 42(3):702-712. [46] 罗明非, 莫宣学, 喻学惠, 等.东昆仑五龙沟晚二叠世花岗闪长岩LA-ICP-MS锆石U-Pb定年、岩石成因及意义[J].地学前缘, 2015, 22(5):182-195. [47] 国显正, 贾群子, 孔会磊, 等.东昆仑东段哈日扎石英闪长岩时代、成因及其地质意义[J].地质科技情报, 2016, (5):18-26. [48] 孔会磊, 李金超, 栗亚芝, 等.青海东昆仑东段加当辉长岩LA-ICP-MS锆石U-Pb测年及其地质意义[J].地质与勘探, 2017, (5):889-902. [49] 孔会磊, 李金超, 栗亚芝, 等.青海东昆仑东段加当橄榄辉长岩锆石U-Pb年代学、地球化学及地质意义[J].地质学报, 2018, 92(5):80-94. [50] 李瑞保.东昆仑造山带(东段)晚古生代-早中生代造山作用研究[D].长安大学博士学位论文, 2012: 1-150. http://cdmd.cnki.com.cn/Article/CDMD-10710-1013017279.htm [51] 李瑞保, 裴先治, 李佐臣, 等.东昆仑东段古特提斯洋俯冲作用——乌妥花岗岩体锆石U-Pb年代学和地球化学证据[J].岩石学报, 2018, 34(11):235-257. -
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ZHANG Xinyuan, LI Wufu, OUYANG Guangwen, WANG Chuntao, CHEN Haiqing. The discovery of Early Triassic volcanic rocks in Zhanhongshan area of Qinghai Province in the eastern section of East Kunlun Mountain and its geological significance[J]. Geological Bulletin of China, 2020, 39(5): 631-641.
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Figure 1.
Simplified geological map of Zhanhongshan area
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Figure 2.
Classification diagrams of volcanic rocks in Zhanhongshan area
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Figure 3.
SiO2-K2O(a)and A/CNK-A/NK(b)diagrams for volcanic rocks of Zhanhongshan area
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Figure 4.
Chondrite-normalized REE patterns(a)and primitive mantle-normalized trace element spider diagrams (b)for volcanic rocks of Zhanhongshan area
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Figure 5.
CL images of zircons from rhyolite
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Figure 6.
Zircon U-Pb concordia diagram(a)and weighted age diagram(b)of rhyolite
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Figure 7.
Y-Nb(a)and Yb-Ta(b)diagrams for volcanic rocks of Zhanhongshan area