The Geochemical Characteristics and Significance of the Magmatic Rocks in Beizhan Iron Mine Zone, Hejing, Xingjiang
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摘要: 新疆和静备战铁矿地处新疆西天山阿吾拉勒山东段，矿区晚古生代岩浆岩发育，出露有钾长花岗岩和钾长花岗斑岩。地球化学特征表明，SiO2=74.24%～75.88%，里特曼指数σ=2.11~2.3，全碱含量(Na2O+K2O)为8.32～8.65，A/CNK=0.868～1.009，属准铝质岩类，属高钾钙碱性系列，I型花岗岩。微量元素特征显示其岩浆源区组成比较复杂，显示了地壳组分参与的影响。ΣREE=96.38×10-6～158.02×10-6，LREE富集，具明显的δEu负异常，δEu=0.07～0.29，δCe=0.54～1.17，LREE/HREE=3.897～12.02。其产出环境为后碰撞构造环境，其花岗岩源区为下部地壳。Abstract: Beizhan iron ore is located in the eastern Awulale of Western Tianshan. The magmatic rocks of late Paleozoic are main intrusive rock in this area, which includes moyite and potash feldspar granite porphyry. The geochemical characteristics show that the content of SiO2 is about 74.24% to 75.88%, the value of σ is from 2.11 to 2.3, the total alkali content (Na2O+K2O) is among 8.32 to 8.65, the value of A/CNK ranges from 0.868 to 1.009, the magmatic rock is Type I granite of metaluminous rock and belongs to high K calc-alkaline series. The trace element characteristics indicate that the composition of magma source region is complex, showing the effects of the components in the crust. The value of ΣREE falls between 96.38 and 158.02×10-6, signifying LREE enrichment, with obvious Eu negative anomaly; δEu changes from 0.07 to 0.29, and δCe varies from 0.54 to 1.17, the value of LREE/HREE is from 3.897 to 12.02. It is concluded that the magmatic rock occurred in the post collision tectonic environment, the granite source region is the lower crust.
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Keywords:
- Hejing /
- Beizhan iron mine /
- magmatic rocks /
- geochemical characteristics
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王庆明, 林卓斌, 黄诚, 等. 西天山查岗诺尔地区矿床成矿系列和找矿方向 [J]. 新疆地质, 2001, 19(04): 263-267. Wang Q M, Lin Z B, Huang C, et al. Meetallogenic series and prospecting target of ore deposits at chagannur region of the western Tianshan [J]. XinJiang Geology, 2001, 19(04): 263-267.
朱永峰, 何国琦, 安芳. 中亚成矿域核心地区地质演化与成矿规律 [J]. 地质通报, 2007, 26(9): 1167-1177. Zhu Y F, He G Q, An F. Geological evolution and metallogeny in the core part of the Central Asian metallogenic domani [J]. Geological Bulletin of China, 2007, 26(9): 1167-1177.
董连慧, 冯京, 刘德权, 等. 新疆成矿单元划分方案研究 [J]. 新疆地质, 2010, 28(01): 1-15. Dong L H, Feng J, Lin D Q, et al. Research for classification of metalogenic unit of Xinjiang[J]. Xinjiang Geology. 2010, 28(01): 1-15.
陈毓川, 刘德权, 唐延龄, 等. 中国天山矿产及成矿体系 [M]. 北京: 地质出版社, 2008: 72-88. 董连慧, 李卫东, 张良臣. 新疆大地构造单元划分及其特征 [A]. 李恒海, 王元孝, 王贵全等. 第六届天山地质矿产资源学术讨论会论文集 [C]. 新疆: 新疆青少年出版社, 2008: 27-32. 左国朝, 张作衡, 王志良, 等. 新疆西天山地区构造单元划分、地层系统及其构造演化 [J]. 地质论评, 2008, 54(6): 748-769. Zuo G C, Zhang Z H, W ang Z L, et al. Tectonic Division, Stratigraphical Stystem and the Evolution of Westen Tianshan Mountains, Xinjiang [J]. Geological Review, 2008, 54(6): 748-769.
高俊, 钱青, 龙灵利, 等. 西天山的增生造山过程 [J]. 地质通报, 2009, 28(12): 1804-1816. Gao J, Qian Q, Long L L, et al. Accretionary orogenic process of Western Tianshan, China [J]. Geological Bulletin of China, 2009, 28(12): 1804-1816.
张作衡, 洪为, 蒋宗胜, 等. 新疆西天山晚古生代铁矿床的地质特征、矿化类型及形成环境 [J]. 矿床地质, 2012, 31(5): 941-964. Zhang Z H, Hong W, Jiang Z S, et al. Geological features, mineralization types and metallogenic setting of Late Paleozoic iron deposits in western Tianshan Mountains of Xinj iang [J]. Mineral Deposits, 2012, 31(5): 941-964.
朱志新, 李锦轶, 董连慧, 等. 新疆西天山古生代侵入岩的地质特征及构造意义 [J]. 地学前缘, 2011, 18(2): 170-179. Zhu Z X, Li J Y, Dong L H, et al. Geological characteristics and tectonic significance of Palcozoic intrusive rocks in Western Tianshan of Xinjiang Province [J]. Earth Science Frontiers, 2011, 18(2): 170-179.
孙吉明, 马中平, 徐学义, 等. 新疆西天山备战铁矿流纹岩的形成时代及其地质意义 [J]. 地质通报, 2012, 31(12): 1973-1982. Sun J M, Ma Z P, Xu X Y, et al. The formation epoch of the host wall rock of the Beizhan iron de posit in West Tianshan Mountains of Xinjiang and its geological significance [J]. Geological Bulletin of China, 2012, 31(12): 1973-1982.
汪帮耀, 姜常义. 西天山查岗诺尔铁矿石炭纪火山岩地球化学特征及岩石成因 [J]. 地质科技情报, 2011, 30(06): 18-27. Wang B Y, Jiang C Y. Petrogenesis and Geochemical Characteristics of Carboniferous Volcanic Rocks of Chagannur Iron Deposit Area in Western Tianshan, Xinjiang [J]. Geological Science and Technology Information, 2011, 30(06): 18-27.
龙灵利, 高俊, 钱青, 等. 西天山伊犁地区石炭纪火山岩地球化学特征及构造环境 [J]. 岩石学报, 2008, 24(4): 699-710. Long Lingli, Gao Jun, Qian Qing, et al. Geochemical Characteristics and Tectonic Seting of Carboniferous Volcanic Rocks from Yili Region, Western Tianshan Mountains [J]. Acta Petrologica Sinica, 2008, 24(4): 699-710.
李大鹏, 杜杨松, 庞振山, 等. 西天山阿吾拉勒石炭纪火山岩年代学和地球化学研究 [J]. 地球学报, 2013, 34(2): 176-192. Li Dapeng, Du Yangsong, Pang Zhenshan, et al. Zircon U-Pb Chronology and Geochemistry of Carboniferous Volcanic Rocks in Awulale Area, Western Tianshan Mountains. Acta Geoscientica Sinica, 2013, 34(2): 176-192.
于海峰, 王福君, 潘明臣, 等. 西天山造山带区域构造演化及其大陆动力学解析 [J]. 西北地质, 2011, 44(2): 25-40. Yu Haifeng, Wang Fujun, Pan Mingchen, et al. Regional Tectonic Evolution and Continental Dynamic characteristics of Western Tianshan Orogenic Belt [J]. Northwest Geology, 2011, 44(2): 25-40.
Allen M B, Windley B F and Zhang C. Plalaeozoic collisional tectonics and magrnatism of the Chinese Tian Shan, central Asia [J]. Tectonophysics, 1992, 220: 89-115.
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