[1]陈士海,钟 文,张健仁.新疆南天山景汗花岗质岩体年代学、地球化学特征及其构造意义[J].华东地质,2020,41(02):128-141.[doi:10.16788/j.hddz.32-1865/P.2020.02.004]
 CHEN Shi-hai,ZHONG Wen,ZHANG Jian-ren.Geochronology and geochemistry of the Jinghan granitic pluton in South Tianshan, Xinjiang and their tectonic significance[J].East China Geology,2020,41(02):128-141.[doi:10.16788/j.hddz.32-1865/P.2020.02.004]
点击复制

新疆南天山景汗花岗质岩体年代学、地球化学特征及其构造意义()
分享到:

《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
41
期数:
2020年02期
页码:
128-141
栏目:
基础地质
出版日期:
2020-06-20

文章信息/Info

Title:
Geochronology and geochemistry of the Jinghan granitic pluton in South Tianshan, Xinjiang and their tectonic significance
文章编号:
2096-1871(2020)02-128-14
作者:
陈士海12钟 文2张健仁2
(1.南京大学地球科学与工程学院,南京 210093; 2.江西省地质调查研究院,南昌 330030)
Author(s):
CHEN Shi-hai12 ZHONG Wen2 ZHANG Jian-ren2
(1.School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China; 2.Jiangxi Institute of Geological Survey, Nanchang 330030, China)
关键词:
构造环境 高钾钙碱性系列 锆石U-Pb定年 新疆南天山
Keywords:
tectonic setting high-K calc-alkaline series zircon U-Pb dating South Tianshan belt Xinjiang
分类号:
P588.12
DOI:
10.16788/j.hddz.32-1865/P.2020.02.004
文献标志码:
A
摘要:
位于新疆南天山和硕县北部的景汗花岗质岩体,为研究南天山造山带构造演化提供了重要信息。岩体岩性以二长花岗岩为主,石英二长闪长岩和二云母花岗岩次之。LA-ICP-MS锆石U-Pb定年结果表明,岩体成岩年龄为(311.3±4.4)Ma~(297.2±4.2)Ma,属晚石炭世岩浆活动的产物。岩体SiO2含量为54.20%~74.22%,全碱(ALK)为5.12%~9.25%,具有高钾钙碱性系列岩石的特征。A/CNK值为0.77~1.07,属于准铝质-弱过铝质花岗岩类。∑REE为(44~288)×10-6,(La/Yb)N值为1.83~44.75,表明轻稀土元素富集较为明显。δEu值为0.54 ~0.93,整体表现为弱亏损特征。花岗质岩浆可能是地壳的部分熔融的产物,并与幔源基性岩浆发生过混合作用。该岩体形成于塔里木板块与伊犁—哈萨克斯坦板块碰撞造山作用晚期阶段,属于碰撞-后碰撞构造环境,南天山晚古生代残余海盆在晚石炭世最终闭合。
Abstract:
The Jinghan granitic pluton, located in the north of Heshuo County, Xinjiang Autonomous Region, bears important information for studying the tectonic evolution of the South Tianshan orogenic belt. This pluton consists mainly of monzonitic granite and less amounts of quartz monzodiorite and two-mica granite. LA-ICP-MS zircon U-Pb dating yields ages of(316.1±3.9)Ma~(298±4)Ma, indicating that the pluton was emplaced in Late Carboniferous. Geochemically, this pluton shows wide variation of chemical compositions, with SiO2 contents ranging from 54.20% to 74.22%, and total alkali values(ALK)from 5.12% to 9.25%, and show characteristics for rocks of high-K calc-alkaline series. Granitic rocks from this pluton have A/CNK values of 0.77~1.07, thus can be grouped into metaluminous-weakly peraluminous granitoids. Total REE contents of 29.65×10-6 to 298.50×10-6 and(La/Yb)N ratios of 1.83 to 29.16 show an obvious enrichment of light rare earth elements. Weakly negative Eu anomalies with δEu values of 0.54 to 1.04 display characteristic of weak depletion. Geochemical characteristics suggest that the granitic magmas likely originated from partial melting of crust materials, and also underwent magma mixing with mantle-derived mafic magmas during the formation process. Combined with the regional tectonic settings and the discrimination results of trace elements, it is concluded that the Jinghan pluton was generated during the late stage of the collision between the Tarim Plate and the Yili-Kazakhstan Plate under a collisional to post-collisional tectonic setting. These results also imply that the late Paleozoic residual oceanic basin in the South Tianshan Belt was finally closed in late Carboniferous.

参考文献/References:

[1] 肖序常,汤耀庆,李锦轶,等. 古中亚复合巨型缝合带南缘构造演化[M].北京:科学技术出版社,1991.
[2] 肖序常,汤耀庆,冯益民,等. 新疆北部及邻区大地构造[M].北京:地质出版社,1992.
[3] 何国琦,李茂松,韩宝福. 中国西南天山及邻区大地构造研究[J].新疆地质,2001,19(1):7-11.
[4] 张芳荣,王会敏,滑鑫,等. 新疆东准格尔纸房东地区奥尔吐组的厘定及火山岩形成时代[J].华东地质,2017,38(3):161-167.
[5] 倪康,武彬,叶现韬. 新疆阿尔金北缘拉配泉组流纹岩的锆石U-Pb年龄及其地质意义[J].华东地质,2017,38(3):168-174.
[6] 朱志新. 新疆南天山地质组成和构造演化[D].北京:中国地质科学院,2007.
[7] 高俊,肖序常,汤耀庆,等. 新疆西南天山蓝片岩的变质作用pTDt 轨迹及构造演化[J].地质论评,1994,40(6):544-553.
[8] 王超,刘良,罗金海,等. 西南天山晚古生代后碰撞岩浆作用: 以阔克萨彦岭地区巴雷公花岗岩为例[J].岩石学报,2007,23(8):1830-1840.
[9] 张成立,周鼎武,王居里,等. 南天山库米什南黄尖石山岩体的年代学、地球化学和 Sr、 Nd同位素组成及其成因意义[J].岩石学报,2007,23(8):1821-1829.
[10] 新疆维吾尔自治区地质矿产局.新疆维吾尔自治区区域地质志[M].北京:地质出版社, 1993.
[11] 朱志新,李锦轶,董连慧,等. 新疆南天山盲起苏晚石炭世侵入岩的确定及对南天山洋盆闭合时限的限定[J].岩石学报,2008,24(12):2761-2766.
[12] 马乐天,张招崇,董书云,等. 南天山英买来花岗岩的地质、地球化学特征及其地质意义[J]. 地球科学,2010,35(6):908-920.
[13] 黄河,张招崇,张东阳,等. 中国南天山晚石炭世—早二叠世花岗质侵入岩的岩石成因与地壳增生[J].地质学报,2011,85(8):1305-1333.
[14] 陈超,吕新彪,曹晓峰,等. 新疆库米什地区晚石炭世—早二叠世花岗岩年代学、地球化学及其地质意义[J].地球科学,2013,38(2):218-232.
[15] 姜常义,穆艳梅,白开寅,等. 南天山花岗岩类的年代学、岩石学、地球化学及其构造环境[J].岩石学报,1999,15(2):298-308.
[16] 朱志新, 董连慧, 王克卓,等. 西天山造山带构造单元划分与构造演化[J]. 地质通报,2013,32(2/3):297-306.
[17] 夏林圻,张国伟,夏祖春,等. 天山古生代洋盆开启,闭合时限的岩石约束——来自震旦纪,石炭纪火山岩的证据[J]. 地质通报,2002,21(2):55-62.
[18] 李锦轶,何国琦,徐新,等.新疆北部及邻区地壳构造格架及其形成过程的初步探讨[J].地质学报,2006,80(1):940-960.
[19] 高俊,龙灵利,钱青,等. 南天山: 晚古生代还是三叠纪碰撞造山带?[J].岩石学报,2006,22(5):1049-1061.
[20] 李曰俊,宋文杰,买光荣,等. 库车和北塔里木前陆盆地与南天山造山带的耦合关系[J]. 新疆石油地质,2001,22(5):376-381.
[21] 张立飞,艾永亮,李强,等. 新疆西南天山超高压变质带的形成与演化[J].岩石学报,2005,21(4):1029-1038.
[22] 肖文交,韩春明,袁超,等. 新疆北部石炭纪—二叠纪早期独特的构造-成矿作用: 对古亚洲洋构造域南部大地构造演化的制约[J].岩石学报,2006,22(5):1062-1076.
[23] 张天宇,樊双虎,陈淑娥,等. 新疆和硕县乌什塔拉红山花岗岩岩浆起源及成因机制[J].西北地质,2013,46(2):18-29.
[24] HUANG Z Y, LONG X P, KRONER A, et al. Geochemistry, zircon U-Pb ages and Lu-Hf isotopes of early aleozoic plutons in the northwestern Chinese Tianshan: Petrogenesis and geological implications[J]. Lithos, 2013, 182/183: 48-66.
[25] 郭瑞清,秦切,木合塔尔·扎日,等. 新疆库鲁克塔格西段奥陶纪花岗岩体地质特征及构造意义[J].地学前缘, 2013,20(4):251-263.
[26] HUANG H, ZHANG Z C, SANTOSH M, et al. Early Paleozoic Tectonic Evolution of the South Tianshan Collisional Belt: Evidence from Geochemistry and Zircon U-Pb Geochronology of the Tiereke Monzonite Pluton, Northwest China[J].The Journal of Geology, 2013, 121(4): 401-424.
[27] WANG T, JAHN B M, KOVACH V P, et al. Nd-Sr isotopic mapping of the Chinese Altai and implications for continental growth in the Central Asian Orogenic Belt[J]. Lithos, 2009,110(1):359-372.
[28] LIN W, CHU Y, JI W B, et al. Geochronological and geochemical constraints for a middle Paleozoic continental arc on the northern margin of the Tarim block: Implications for the Paleozoic tectonic evolution of the South Chinese Tianshan[J]. Lithosphere, 2013, 5(4):355-381.
[29] 张艳,孙晓猛. 新疆库鲁克塔格地区晚泥盆世火山岩40Ar/39Ar 年代学及其地质意义[J].岩石学报,2010,26(1):302-308.
[30] HU Z C, GAO S, LIU Y S, et al. Signal enhancement in laser ablation ICP-MS by addition of nitrogen in the central channel gas [J].Journal of Analytical Atomic Spectrometry, 2008, 23(8): 1093-1101.
[31] LIU Y S, HU Z C, GAO S, et al. In situ analysis of major and trace elements of anhydrousminerals by LA-ICP-MS without applying an internal standard [J].Chemical Geology, 2008,257(1/2): 34-43.
[32] LIU Y S, GAO S, HU Z C, et al. Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen: U-Pb dating, Hf isotopes and trace elements in zircons from mantle xenoliths [J]. Journal of Petrology, 2010, 51(1/2):537-571.
[33] LIU Y S, HU Z C, ZONG K Q, et al. Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS [J]. Chinese Science Bulletin, 2010, 55(15):1535-1546.
[34] 全国国土资源标准化技术委员会地质矿产实验测试分析技术委员会. DZ/T 0130—2006地质矿产实验室测试质量管理规范[S].2006.
[35] PECCERILLO A, TAYLOR S R. Geochemistry of Eocene calc-alkaline volcanic rocks from the kastomonon area, Northern Turkey [J]. Contributions to Mineralogy and Petrology,1976,58(1):63-81.
[36] 迟清华,鄢明才. 应用地球化学元素丰度数据手册[M].北京:科学出版社,2007.
[37] SHI C G, YAN M C, CHI Q H. Abundances of chemical elements of the granitoids in different geotectonic units of China and their characteristics[J]. Acta Geological Sinica, 2007,1(3):309-321.
[38] MCDONOUGH W F, SUN S S. The composition of the Eaeth[J]. Chemical Geology, 1995, 120(3/4):223-253.
[39] WHALEN J B,CURRIE K L, CHAPPELL B W. A-type granites:Geochemical characteristics, discrimination and petrogenesis[J]. Contributions to Mineralogy and Petrology, 1987,95(4):407-419.
[40] 肖庆辉. 花岗岩研究思维与方法:中国地质调查局《中国花岗岩重大基础研究》项目成果[M].北京:地质出版社, 2002.
[41] 莫宣学, 邓晋福, 董方浏,等. 西南三江造山带火山岩-构造组合及其意义[J].高校地质学报, 2001,7(2):121-138.
[42] 王德滋, 舒良树. 花岗岩构造岩浆组合[J].高校地质学报,2007,13(3):362-370.
[43] 张旗, 王元龙, 金惟俊,等. 造山前、造山和造山后花岗岩的识别[J].地质通报,2008,27(1):1-18.
[44] PEARCE J A, HARRIS N B, TINDLE A G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J]. Journal of Petrology, 1984, 25(4): 956-983.
[45] 邓晋福,赵海玲,赖绍聪,等. 白云母/二云母花岗岩形成与陆内俯冲作用[J].地球科学:中国地质大学学报,1994,19(2):139-147.
[46] BATCHELOR R A, BOWDEN P. Petrogenetic interpretation of granitoid rock series using multicationic parameters[J]. Chemical Geology, 1985(48):43-55.
[47] 朱志新,董连慧, 王克卓,等. 西天山造山带构造单元划分与构造演化[J].地质通报,2013, 32(2/3):297-306.

备注/Memo

备注/Memo:
*收稿日期:2019-06-24 修订日期:2019-11-01 责任编辑:叶海敏
基金项目:新疆地勘基金中心“新疆西天山克尔古提一带1:5万三幅区域地质调查( 编号:T14-1-LQ07)”项目资助。
第一作者简介:陈士海, 1986年生,男,硕士研究生,矿物学、矿床学、岩石学专业。
更新日期/Last Update: 2020-06-23