Geochronology, Petrogeochemical Characteristics and Tectonic Significance of Gabbro Dike from Western Quruqtagh in Xinjiang
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摘要: 库鲁克塔格位于塔里木克拉通与南天山构造带结合部位。笔者报道了其西段辉长岩脉，岩脉主体岩性为辉长岩，使用LA-ICP-MS法测得锆石U-Pb定年龄为（411±5） Ma，为岩体的成岩年龄，属早泥盆世幔源岩浆活动产物。岩石化学特征显示，辉长岩SiO2含量为48.60%~50.61%，MgO含量为5.51%~7.96%，Mg#值为51~59，属钙碱性玄武岩系列；稀土元素特征显示，轻稀土元素相对富集，具Eu弱负异常；在微量元素原始地幔标准化蛛网图上，该辉长岩富集K、Rb等大离子亲石元素，亏损Nb、Ta、P、Ti等高场强元素。结合区域地质资料及地球化学特征，笔者认为辉长岩源自被俯冲流体改造过的亏损地幔楔的部分熔融，这为南天山南缘古生代中期主动大陆边缘性质提供了有益信息。
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关键词:
- 辉长岩 /
- LA-ICP-MS锆石U-Pb定年 /
- 库鲁克塔格 /
- 南天山
Abstract: The Quruqtagh is located at the junction part between Tarim Craton and Southern Tianshan tectonic zone. The gabbro dike has been found in the western section of Quruqtagh area, which is composed mainly of gabbro. Zircon LA-ICP-MS U-Pb dating yields an age of (411±5)Ma, implying that the magmatic crystallization epoch of the gabbro is lower Devonian. Geochemical characteristics show that SiO2 contents range from 48.60% to 50.61%, while MgO contents range from 5.51% to 7.96% with Mg# values of 51~59. This gabbro is characterized by calk-alkaline basaltic series, with relative LREE enrichment and weakly Eu anomaly in the chondrite-normalized REE patterns. In the primitive mantle-normalized trace elements patterns, this gabbro is enriched in LILEs such as K and Rb, while it's depleted in HFSEs, such as Nb, Ta, P and Ti. According to the comprehensive synthesis on regional geology and geochemical characteristics, the gabbro magma is considered to have been derived from partial melting of depleted mantle wedge that previously metasomatized by slab-derived aqueous fluids. This contribution provides helpful information for understanding the middle Paleozoic tectonic features of southern margin of south Tianshan served as an active continental margin.-
Key words:
- gabbro dike /
- LA-ICP-MS zircons U-Pb dating /
- Quruqtagh /
- southern Tianshan
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蔡志慧,许志琴,唐哲民,等. 塔里木盆地东北缘库鲁克塔格地区的早古生代地壳变形以及造山时限[J]. 中国地质,2011, 38(4):855-867.
CAI Zhihui, XU Zhiqin, TANG Zhemin, et al. The crustal deformation during the Early Paleozoic period and the timing oforogeny in Kuruktag area on the northeast margin of Tarim Basin[J]. Geology in China, 2011, 38(4):855-867.
郭瑞清,尼加提·阿布都逊,秦切,等. 新疆塔里木北缘志留纪花岗岩类侵入岩的地质特征及构造意义[J]. 地质通报,2013a, 32(Z1):220-238.
GUO Ringqing, NIJAT Abdursul, QIN Qie, et al. Geological characteristics and tectonic significance of Sil-urian granitic intrusions in the northern Tarim craton, Xinjiang[J]. Geological Bulletin of China, 2013a, 32(Z1):220-238.
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,2013b, 20(4):251-263.
GUO Ruiqing, QIN Qie, MUHETAER Zari, et al. Geological characteristics and tectonic significance of Ordovician granite intru-sions in the western segment of Quruqtagh,Xinjiang[J]. Earth Science Frontiers, 2013b, 20(4):251-263.
高俊,张立飞,刘圣伟,等. 西天山蓝片岩榴辉岩形成和抬升的40Ar/39Ar年龄记录[J]. 科学通报,2000, 45(1):89-94.
GAO Jun, ZHANG Lifei, LIU Shengwei, et al.West tianshan blueschist and eclogite formation and uplift of 40Ar/39Ar record[J], Chinese Science Bulletin, 2000,45(1):89-94.
黄岗,张占武,董志辉,等. 南天山铜花山蛇绿混杂岩中斜长花岗岩锆石LA-ICP-MS微区U-Pb定年及其地质意义[J]. 中国地质,2011, 38(1):94-102.
HUANG Gang, ZHANG Zhanwu, DONG Zhihui, et al. Zircon LA-ICP-MS U-Pb age of plagiogranite from Tonghuashan ophiolite in Southern Tianshan Mountains and its geological implications[J].Geology in China, 2011, 38(1):94-102.
贾晓亮,郭瑞清,柴凤梅,等. 新疆库鲁克塔格西段泥盆纪二长花岗岩年龄、地球化学特征及其构造意义[J]. 地质通报,2013, 32(Z1):239-250.
JIA Xiaoliang, GUO Ruiqing, CHAI Fengmei, et al. Geochemistry and geochronology of monzogranites in Kuruktag of Xinjiang and their tectonic implications[J]. Geological Bulletin of China, 2013, 32(Z1):239-250.
龙灵利,高俊,熊贤明,等. 南天山库勒湖蛇绿岩地球化学特征及其年龄[J]. 岩石学报,2006, 22(1):65-73.
LONG Lingli,GAO Jun,XIONG Xianming, et al. The geochemical characteristics and the age of the Kule Lake ophiolite in the southern Tianshan[J]. Acta Petrologica Sinica, 2006, 22(1):65-73.
李锦轶,王克卓,李亚萍,等. 天山山脉地貌特征、地壳组成与地质演化[J]. 地质通报,2006, 25(8):895-909.
LI Jinyi, WANG Kezhuo, LI Yaping, et al. Geomorphological features, crustal composition and geological evolotion of the Tianshan Mountains[J]. Geological Bulletin of China, 2006, 25(8):895-909.
李日俊,张洪安,钱一雄,等. 关于南天山碰撞造山时代的讨论[J]. 地质科学,2010, 45(1):57-65.
LI Yuejun, ZHANG Hongan, QIAN Yixiong, et al. The collision time of south Tianshan orogeny, NW China[J]. Chinese Journal of Geology, 2010, 45(1):57-65.
马中平,夏林圻,徐学义,等. 南天山库勒湖蛇绿岩锆石年龄及其地质意义[J]. 西北大学学报 (自然科学版),2007, 37(1):107-110.
MA Zhongping, XIA Linqi, XU Xueyi, et al. Dating for zircons of gabbro from Kulehu ophiolite, southern Tianshan, and its geological implication[J]. Journal of Northwest University (Natural Science Edition), 2007, 37(1):107-110.
马昌前,杨坤光,唐仲华,等. 花岗岩类岩浆动力学-理论方法及鄂东花岗岩类例析[M]. 武汉:中国地质大学出版社, 1994, 38-48.
MA Changqian, YANG Kunguang, TANG Zhonghua, et al. Granite magma dynamics[M]. Wuhan:China University of Geosciences Press,1994, 38-48.
尼加提·阿布都逊,郭瑞清,帕拉提·阿布都卡迪尔,等. 新疆库鲁克塔格阿訇开里得南石炭纪花岗岩LA-ICP-MS锆石U-Pb定年及其地质意义[J]. 地质通报,2013, 32(Z1):251-259.
NIJAT Abdursul, GUO Ruiqing, PALATI A, et al. Zircon LA-ICP-MS U-Pb dating of South Ahongkailide Carbonifereous granite in Kuruktag of Xinjiang and its geological implications[J]. Geological Bulletin of China, 2013, 32(Z1):251-259.
夏林圻,徐学义,夏祖春,等. 天山石炭纪碰撞后裂谷火山作用[J]. 地质学报,2003, 77(3):358.
XIA Linqi, XU Xueyi, XIA Zuchun, et al. Tianshan carboniferous post-collision volcanism[J]. Acta Geologica Sinica, 2003, 77(3):358.
张斌,陈文,喻顺,等. 南天山洋古生代期间俯冲作用过程探讨[J]. 岩石学报,2014, 30(08):2351-2362.
ZHANG Bin, CHEN Wen, YU Shun, et al. Subduction process of South Tianshan Oceanduring Paleozoic[J]. Acta Petrologica Sinica, 2014, 30(8):2351-2362.
朱志新,王克卓,郑玉洁,等. 新疆伊犁地块南缘志留纪和泥盆纪花岗质侵入体锆石SHRIMP定年及其形成时构造背景的初步探讨[J]. 岩石学报,2006, 22(5):1193-1200.
ZHU Zhixin, WANG Kezhuo, ZHENG Yujie, et al. Zircon SHRIMP dating of Silurian and Devonian granitic intrusions in the southern Yili block, Xinjiang and preliminary discussion on their tectonic setting[J]. Acta Petrologica Sinica, 2006, 22(5):1193-1200.
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,2008a, 24(12):2761-2766.
ZHU Zhixin, LI Jinyi, DONG Lianhui, et al. The age determination of Late Caboniferous intrusions in Mangqisu region and its constraints to the closure of oceanic basin in South Tianshan,Xinjiang[J]. Acta Petrologica Sinica, 2008a, 24(12):2761-2766.
朱志新,李锦轶,董连慧,等. 新疆塔里木北缘色日牙克依拉克一带泥盆纪花岗质侵入体的确定及其地质意义[J]. 岩石学报,2008b, 24(5):971-976.
ZHU Zhixin, LI Jinyi, DONG Lianhui, et al. Age determination and geological significance of Devonian granitic intrusions in Seriyakeyilake region, northern margin of Tarim basin, Xinjiang[J]. Acta Petrologica Sinica, 2008b, 24(5):971-976.
左国朝,刘义科,张招崇,等. 中亚地区中、南天山造山带构造演化及成矿背景分析[J]. 现代地质,2011, 25(1):1-14.
ZOU Guochao, LIU Yike, ZHANG Zhaochong, et al. Tection evolution of central and South Tianshan or ogenic belts in the central Asia and mineralization background[J]. Geoscience, 2011, 25(1):1-14.
周鼎武,苏犁,简平,等. 南天山榆树沟蛇绿岩地体中高压麻粒岩SHRIMP锆石U-Pb年龄及构造意义[J]. 科学通报,2004, 49(14):1411-1415.
ZHOU Dingwu, SU Li, JIAN Ping, et al. Ophiolite of the high pressure granulite SHRIMP zircon U-Pb age and tectonic significancefrom Yushugou area, South Tianshan[J]. Chinese Science Bulletin, 2004, 49(14):1411-1415.
赵振华. 微量元素地球化学原理[M]. 北京:科学出版社, 1997, 1-238.
ZHAO Zhenhua.Trace element geochemical principle[M]. Beijing:Science Press, 1997, 1-238.
ANDERSEN T. Correction of common lead in U-Pb analyses that do not report 204Pb[J]. Chemical Geology, 2002, 192(1-2):59-79.
GE R F, ZHU W B, WILDE S A, et al. Neoproterozoic to Paleozoic long-lived accretionary orogeny in the northern Tarim Craton[J]. Tectonics, 2014a, 33(3):302-329.
GE R F, ZHU W B, WILDE S A, et al. Archean magmatism and crustal evolution in the northern Tarim Craton:Insights from zircon U-Pb-Hf-O isotopes and geochemistry of~2.7Ga orthogneiss and amphibolite in the Korla Complex[J]. Precambrian Research, 2014b, 252:145-165.
HAWKESWORTH C J, GALLAGHER K, HERGT J M, et al. Mantle and Slab Contribution in Arc Magmas[J]. Annual Review of Earth And Planetary Sciences, 1993, 21:175-204.
HAN B F, HE G Q, WANG X C, et al. Late Carboniferous collision between the Tarim and Kazakhstan-Yili terranes in the western segment of the South Tian Shan Orogen, Central Asia, and implications for the Northern Xinjiang, western China[J]. Earth-Science Reviews, 2011, 109(3-4):74-93.
JOHNSON K T M, DICK H J B, SHIMIZU N, et al. Melting in the oceanic upper mantle:An ion microprobe study of diopsides in abyssal peridotite[J]. Journal of Geophysical Research, 1990, 95(B3):2661-2678.
JACKSON S E, PEARSON N J, GRIFFIN W L, et al. The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U-Pb zircon geochronology[J]. Chemical Geology, 2004, 211(1-2):47-69.
KIEFFER B, ARNDT N, LAPIERRE H, et al. Flood and shield basalts from Ethiopia:magmas from the Africa Superswel[J]. Journal of Petrology, 2004, 45(4):793-834.
KOSCHEK G. Origin and significance of the SEM cathodoluminescence from zircon[J]. Journal of Microscopy, 1993, 171(3):223-232.
LIN W, CHU Y, JI W, 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.
LASSITER J, DEPAOLO D. Plume/lithosphere interaction in the generation of continental and oceanic flood basalts:Chemical and isotope constraints[M]. USA:American Geophysical Union:Geophysical Monography, 1997, 335-355.
LONG X P, YUAN C, SUN M, et al. Reworking of the Tarim Craton by underplating of mantle plume-derived magmas:Evidence from Neoproterozoic granitoids in the Kuluketage area, NW China[J]. Precambrian Research, 2011, 187(1-2):1-14.
LU S N, LI H K, ZHANG C L, et al. Geological and geochronological evidence for the Precambrian evolution of the Tarim Craton and surrounding continental fragments[J]. Precambrian Research, 2008, 160(1-2):94-107.
MA C, LI Z, CARL E, et al. A post-collisional magmatic plumbing system; Mesozoic granitoid plutons from the Dabieshan high-pressure and ultrahigh-pressure metamorphic zone, east-central China[J]. Lithos, 1998, 45(1-4):431-456.
PLANK T, LANGMUIR C H. The chemical composition of subducting sediment and its consequences for the crust and mantle[J]. Chemical Geology, 1998, 145(3-4):325-394.
QIN Q, HUANG H, WANG T, et al. Relationship of the Tarim Craton to the Central Asian Orogenic Belt:insights from Devonian intrusions in the northern margin of Tarim Craton, China[J]. International Geology Review, 2016, 58(16):2007-2028.
RUDNICK R L, GAO S. 3.01-Composition of the Continental Crust[J]. Treatise on Geochemistry, 2003, 3:1-64.
SHU L S, DENG X L, ZHU W B, et al. Precambrian tectonic evolution of the Tarim Block, NW China:New geochronological insights from the Quruqtagh domain[J]. Journal of Asian Earth Sciences, 2011, 42(5):774-790.
SUN S, MCDONOUGH W. Chemical and isotopic systematics of oceanic basalts implications for mantle composition and processes[M]. Magmatism in the Ocean Basins, Geological Society. ed; Sounders A D, Norry M J, London:Special Pubication, 1989:42(1), 313-345.
SAUNDERS A, STOREY M, KENT R, et al. Consequences of plume-lithosphere interaction(in Magmatism and the causes of continental break-up)[J]. Geological Society Special Publications, 1992, 68(1):41-60.
WOODHEAD J D, EGGINS S M, JOHNSON R W, et al. Magma Genesis in the New Britain Island Arc:Further Insights into Melting and Mass Transfer Processes[J]. Journal of Petrology, 1998, 39(9):1641-1668.
WANG B, SHU L, FAURE M, et al. Paleozoic tectonics of the southern Chinese Tianshan:Insights from structural, chronological and geochemical studies of the Heiyingshan ophiolitic mélange (NW China)[J]. Tectonophysics, 2011, 497(1-4):85-104.
ZHANG C L, ZOU H B, WANG H Y, et al. Multiple phases of the Neoproterozoic igneous activity in Quruqtagh of the northeastern Tarim Block, NW China:Interaction between plate subduction and mantle plume?[J]. Precambrian Research, 2012, 222-223:488-502.
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