Geochemical Characteristics and Geological Significance of Gabbro from the South Tianshan Hongliugou in Xinjiang

ZHANG Qi; LI Shangqi; LIU Yuan; SHEN Rui; CHANG Hao; HUO Xingkai; CHAO Wendi

doi:10.12401/j.nwg.2024056

2024 Vol. 57, No. 5

Article Contents

Article navigation > Northwestern Geology > 2024 > 57(5): 248-258

Next Article Previous Article

ZHANG Qi, LI Shangqi, LIU Yuan, SHEN Rui, CHANG Hao, HUO Xingkai, CHAO Wendi. 2024. Geochemical Characteristics and Geological Significance of Gabbro from the South Tianshan Hongliugou in Xinjiang. Northwestern Geology, 57(5): 248-258. doi: 10.12401/j.nwg.2024056

Citation:

ZHANG Qi, LI Shangqi, LIU Yuan, SHEN Rui, CHANG Hao, HUO Xingkai, CHAO Wendi. 2024. Geochemical Characteristics and Geological Significance of Gabbro from the South Tianshan Hongliugou in Xinjiang. Northwestern Geology, 57(5): 248-258. doi: 10.12401/j.nwg.2024056

Geochemical Characteristics and Geological Significance of Gabbro from the South Tianshan Hongliugou in Xinjiang

Northwest Geological Exploration Institute of China Metallurgical Geology Administration, Xi’an 710119, Shaanxi, China

More Information

Corresponding author: LI Shangqi, 349966977@qq.com

Received Date: 07 June 2023

Revised Date: 21 March 2024

Accepted Date: 05 June 2024

Publish Date: 20 October 2024

Abstract

Abstract

The Hongliugou gabbro is located in the eastern part of the Halke Saarming Late Paleozoic arc belt on the northern edge of the South Tianshan Mountains. It is one of the few intrusive rock masses exposed in the Early Paleozoic arc magmatic belt on the northern edge of the South Tianshan Mountains and the southern edge of the Central Tianshan Mountains. Gabbro is mainly composed of plagioclase (±48%), common pyroxene (±42%), biotite (±5%), and hornblende (±5%). The chemical composition of the rock shows that the Na₂O content of gabbro ranges from 2.49% to 3.08%, with an average of 2.83%; The K₂O content ranges from 1.6% to 2.4%, with an average of 2.02%. The Rittman index is 1.78 to 2.09, both of which are less than 3.3%; The differentiation index ranges from 50.3 to 57.06, and the main trace diagram shows that it belongs to the plaque calcium alkaline series; The standardized distribution pattern of rare earth elements in gabbro chondrite meteorites is similar to that of E-MORB, with enrichment of light rare earth elements and depletion of heavy rare earth elements, and no significant difference observed δ Eu anomaly, trace elements with enrichment of large ion lithophilic elements such as Rb, Ba, Th, U, and depletion of high field strength elements such as Ta, Nb, Ti; Zircon in-situ the εHf (t) value ranges from 1.27 to 8.75, indicating that the gabbro originated from the depleted mantle and was significantly contaminated by the crust during its ascent. The w (Na₂O+K₂O)/w (TiO₂) discrimination diagram of the basic rocks shows partial melting of carbonated peridotite in the Hongliugou gabbro source area. The zircon U-Pb dating shows that the age of gabbro formation is (410.4±2.3)Ma (MSWD=0.51, n=25). This study supplemented the dating and geochemical evidence of gabbro in the South Tianshan tectonic belt, and combined with regional geological data, we proposed that in the Early Devonian, there was oceanic continental subduction in the South Tianshan Ocean, accompanied by the intrusion of basic rocks.
- Hongliugou area /
- South Tianshan /
- gabbro /
- geochemistry /
- chronology

FullText(HTML)

References

[1]	鲍庆中, 王宏, 沙德铭, 等. 新疆和静县大山口金矿床成矿流体地球化学特征研究[J]. 西北地质, 2006, 36（2）: 43−49. Google Scholar BAO Qingzhong, WANG Hong, SHA Deming, et al. Study on the geochemical characteristics of ore-forming fluid inclusion of Dashankou gold deposit in Xinjiang[J]. Northwestern Geology,2006,36(2):43−49. Google Scholar
[2]	董丰新, 薛春纪, 石福品. 新疆西天山大山口金矿地质及成矿流体包裹体地球化学[J]. 地学前缘, 2011, 18（5）: 172−181. Google Scholar DONG Fengxin, XUE Chunji, SHI Fupin. Geological characteristics and the geochemistry of ore-forming fluid inclusions in Dashankou gold deposit, Western Tian Shan, Xinjiang[J]. Earth Science Frontiers,2011,18(5):172−181. Google Scholar
[3]	郭春涛, 高剑, 李忠. 塔里木盆地西北缘四石厂地区下二叠统沉积与物源记录及其反映的构造演化[J]. 地球科学, 2018, 43（11）: 4149−4168. Google Scholar GUO Chuntao, GAO Jian, LI Zhong. Depositional and provenance records of Lower Permian sandstones from Sishichang area, northwestern Tarim Basin: implications for tectonic evolution[J]. Earth Science,2018,43(11):4149−4168. Google Scholar
[4]	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, 2013, 32（21）: 220−238. Google Scholar GUO Ruiqing, Nijiat. Abdursul, QIN Qie, et al. Geological characteristics and tectonic significance of sil-uriangranitic intrusions in the northern Tarim craton, Xinjiang[J]. Geological Bulletin of China,2013,32(21):220−238. Google Scholar
[5]	郭瑞清, 秦切, 邹明煜, 等. 新疆库鲁克塔格西段辉长岩脉年代学、岩石地球化学特征及构造意义[J]. 西北地质, 2018, 51（4）: 70−81. doi: 10.3969/j.issn.1009-6248.2018.04.009 CrossRef Google Scholar GUO Rinqing, QIN Qie, ZOU Mingyu, et al. Geochronology, petrogeochemical characteristics and tectonic significance of gabbro dike from western quruqtagh in xinjiang[J]. Northwestern Geology,2018,51(4):70−81. doi: 10.3969/j.issn.1009-6248.2018.04.009 CrossRef Google Scholar
[6]	刘传朋, 邓俊, 刘同, 等. 南天山东段乌祖尔恩布拉格花岗岩锆石U-Pb年龄、地球化学特征及地质意义[J]. 地质论评, 2022, 68（4）: 1481−1500. Google Scholar LIU Chuanpeng, DENG Jun, LIU Tong, et al. Zircon U-Pb age, geochemical characteristics, and geological significance of the Wuzur’ enbulage intrusion in the eastern section of South Tianshan Mountains[J]. Geological Review,2022,68(4):1481−1500. Google Scholar
[7]	刘桂萍, 郭瑞清, 魏震, 等. 新疆库鲁克塔格地区古生代花岗质侵入岩全岩Sr-Nd和锆石Hf同位素地球化学特征及其意义[J]. 西北地质, 2021, 54（3）: 39−50. Google Scholar LIU Guiping, GUO Ruiqing, WEI Zhen, et al. Geochemical Characteristics and Significance of the Whole Rock Sr Nd and Zircon Hf Isotopic in the Paleozoic Granite-plutons in Kuruktag, Xinjiang[J]. Northwestern Geology,2021,54(3):39−50. Google Scholar
[8]	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. doi: 10.3321/j.issn:1000-0569.2006.01.007 CrossRef Google Scholar LONG Lingli, GAO Jun, XIONG Xianming, et al. The geochemical characteristics and the age of the Kule Lake ophiolite in the Sourthern Tianshan[J]. Acta Petrological Sinica,2006,22(1):65−73. doi: 10.3321/j.issn:1000-0569.2006.01.007 CrossRef Google Scholar
[9]	田亚洲, 杨经绥, 刘飞, 等. 新疆布鲁斯台辉长岩岩石学特征及对南天山洋俯冲时限的制约[J]. 岩石学报, 2014, 30（8）: 2363−2380. Google Scholar TIAN Yazhou, YANG Jingsui, LIU Fei, et al. Petrological characteristics of Bulusitai gabbro and its constraint to the time of South Tianshan ocean subduction[J]. Acta Petrologica Sinica,2014,30(8):2363−2380. Google Scholar
[10]	魏强, 张成立, 何贤英, 等. 南天山巴音布鲁克花岗岩岩体成因: 锆石U-Pb定年、Hf同位素及其地球化学证据[J]. 地质学报, 2017, 91（7）: 1443−1453. Google Scholar WEI Qiang, ZHANG Chengli, HE Xianying, et al. Origin of Bayinbuluk Pluton in Southern Tianshan: Evidences from Zircon U-Pb dating, Hf isotope and geochemistry[J]. Acta Geological Sinica,2017,91(7):1443−1453. Google Scholar
[11]	肖文交, 韩春明, 袁超, 等. 新疆北部石炭纪-二叠纪独特的构造-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. doi: 10.3321/j.issn:1000-0569.2006.05.002 CrossRef Google Scholar XIAO Wenjiao, HAN Chunming, YUAN Chao, et al. Unique Carboniferous-Permian tectonic-metallogenic framework of North Xinjiang (NW China): Constraints for the tectonics of the southern Paleoasian Domain[J]. Acta Petrologica Sinica,2006,22(5):1062−1076. doi: 10.3321/j.issn:1000-0569.2006.05.002 CrossRef Google Scholar
[12]	杨莉, 陈文, 张斌, 等. 新疆额尔宾山花岗岩侵位年龄和成因及其对南天山洋闭合时代的限定[J]. 地质通报, 2016, 35（1）: 152−166. doi: 10.3969/j.issn.1671-2552.2016.01.014 CrossRef Google Scholar YANG Li, CHEN Wen, ZHANG Bin, et al. Ages and geochemistry of the Erbeng granite in southern Tianshan orogenic belt, Xinjiang: New constraints on the tectonic evolution of the southern Tianshan Ocean[J]. Geological Bulletin of China,2016,35(1):152−166. doi: 10.3969/j.issn.1671-2552.2016.01.014 CrossRef Google Scholar
[13]	于新慧, 秦切, 黄河, 等. 南天山盲起苏花岗岩体的成因及构造意义: 来自年代学、地球化学及Nd-Hf同位素证据[J]. 地质学报, 2020, 94（10）: 2893−2918. doi: 10.3969/j.issn.0001-5717.2020.10.009 CrossRef Google Scholar YU Xinhui, QIN Qie, HUANG He, et al. Genesis and tectonic significance of the Mangqisu pluton in the South Tianshan: evidence from geochronology, geochemistry, and Nd-Hf isotopes[J]. Acta Geologica Sinica,2020,94(10):2893−2918. doi: 10.3969/j.issn.0001-5717.2020.10.009 CrossRef Google Scholar
[14]	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（8）: 2351−2362. Google Scholar ZHANG Bin, CHEN Wen, YU Shun, et al. Subduction process of South Tianshan Ocean during Paleozoic[J]. Acta Petrologica Sinica,2014,30(8):2351−2362. Google Scholar
[15]	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. doi: 10.3969/j.issn.1000-8527.2011.01.001 CrossRef Google Scholar ZUO Guochao, LIU Yike, ZHANG Zhaochong, et al. Tection evoliution of central and South Tianshan or ogenic belts in the central Asia and mineralization background[J]. Geoscience,2011,25(1):1−14. doi: 10.3969/j.issn.1000-8527.2011.01.001 CrossRef Google Scholar
[16]	Chen B, Long X P, Yuan C, et al. Geochronology and geochemistry of Late Ordovician-Early Devonian gneissic granites in the Kumishi area, northern margin of the South Tianshan Belt: Constraints on subduction process of the South Tianshan Ocean[J]. Journal of Asian Earth Sciences,2015,113(1):293−309. Google Scholar
[17]	Han Baofu, He Guoqi, Wu Tairan, et al. Zircon U-Pb dating and geochemical fratures of early Paleozoic granites from Tianshan, Xinjiang: Implications for tectonic evolution[J]. Xinjiang Geology,2004,22(1):4−11. Google Scholar
[18]	Huang Yiming, Hawkesworth Chris, Smith Ian, et al. Geochemistry of Late Cenozoic basaltic volcanism in Northland and Coromandei New Zealand: implications for mantel enrichment processes[J]. Chemical Geology,2000,164(3−4):219−238. Google Scholar
[19]	Xiao Wenjiao, Han Chunming, Yuan Chao, et al. Middle Cambrian to Permian subduction-related accretionary orogenesis of Northern Xinjiang, NW China: Implications for the tectonic evolution of central Asia[J]. Journal of Asian Earth Sciences,2008,32(2−4):102−117. Google Scholar
[20]	Yang Jingsui, Xu Xiangzhen, Li Tianfu, et al. U-Pb ages of zircons from ophiolite and related rocks In the Kumishi region at the southern margin of Middle Tianshan, Xinjiang: Evidence of Early Paleozoic oceanic basin[J]. Acta Petrologica Sinica,2011,27(1):77−95. Google Scholar
[21]	Yang Shenghong, Zhou Meifu. Geochemistry of the-430 Ma Jingbulake mafic-ultramafic intrusion in Western Xinjiang, NW China: Implications for subduction related magmatism in The South Tianshan orogenic belt.[J]. Lithos,2009,113:259−273. doi: 10.1016/j.lithos.2009.07.005 CrossRef Google Scholar
[22]	Zhang Chengli, Zhou Dingwu, Wang Juli, et al. Geochronology, geochemistry and Sr-Nd isotopic composition and genesis implications of Hangjianshishan granite Kumishi area of southern Tianshan[J]. Acta Petrologica Sinica,2007,23(8):1821−1829. Google Scholar
[23]	Zhong Linglin, Wang Bo, Shu Liangshu, et al. Structural overprints of early Paleozoic arc-related intrusive rocks in the Chinese Central Tianshan: Implications for Paleozoic accretionary tectonics in SW Central Asian Orogenic Belts[J]. Journal of Asian Earth Sciences,2015,113(1):194−217. Google Scholar