| 黑龙江黄松群的地球化学特征及形成环境分析 |
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| 引用本文： | 李想,于泓超,许俸源,窦鲁文.黑龙江黄松群的地球化学特征及形成环境分析[J].世界地质,2016,35(3):697-707. |
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| 作者姓名： | 李想 于泓超 许俸源 窦鲁文 |
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| 作者单位： | 1. 吉林大学 古生物学与地层学研究中心，长春 130026; 2. 吉林大学 地球科学学院，长春 130061; 3. 山东省第七地质矿产勘查院，山东 临沂 276006; 4. 中国冶金地质总局 山东正元地质勘查院，济南 250101 |
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| 摘 要： | 对佳木斯—兴凯地块西南缘的黄松群进行其物源区特点、古风化条件和构造背景等分析结果显示,该套变质碎屑岩源岩为泥砂质沉积岩,源区母岩以中酸性火成岩为主。风化作用相关指数CIA、CIW及PIA,由杨木组到阎王殿组逐渐增高,而ICV值则呈递减趋势,体现了风化作用由弱到强,成分成熟度逐渐升高的特点。主量元素特征值SiO_2=69.95%、TiO_2=0.58%、TFe_2O_3+MgO=5.34%、Al_2O_3/SiO_2=0.21,微量元素特征值La=37.54×10~(-6)、Ce=72.83×10~(-6)、δEu=0.60、ΣREE=182.29×10~(-6)。REE配分模式与活动大陆边缘碎屑沉积物类似,并且在不同构造环境判别图解中,绝大多数样品投影点落入活动大陆边缘区。地球化学特征表明,黄松群碎屑岩可能沉积于活动大陆边缘环境。
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| 关 键 词： | 佳木斯—兴凯地块 黄松群 变质岩 地球化学特征 构造环境 黑龙江 |
Geochemical characteristics of Huangsong Group in Heilongjiang and its tectonic environments |
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| LI Xiang,YU Hong-Chao,XU Feng-Yuan,DOU Lu-Wen.Geochemical characteristics of Huangsong Group in Heilongjiang and its tectonic environments[J].World Geology,2016,35(3):697-707. |
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| Authors: | LI Xiang YU Hong-Chao XU Feng-Yuan DOU Lu-Wen |
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| Institution: | 1. Research Center of Paleontology and Stratigraphy，Jilin University，Changchun 130026，China; 2. College of Earth Sciences，Jilin University，Changchun 130061，China; 3. The Seventh Institute of Geology and Mineral Exploration of Shandong Province，Linyin 276006，Shandong，China; 4. Zhenyuan Geological Exploration Institute of Shandong，China Metallurgical Geology Bureau，Jinan 250101，China |
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| Abstract: | The provenance characters，weathering conditions and tectonic setting of Huangsong Group in southwestern margin of Jiamusi- - Khanka massifs in eastern Heilongjiang were discussed． The results show that the source rocks of metamophic rocks are dominated by argillaceous sandstone and arenaceous mudstone，and the par- ent rocks are mainly intermediate- acid igneous rocks． The chemical index of alteration (CIA)，chemical index of weathering (CIW) and plagioclase index of alteration (PIA) show an obvious increasing from the Yangmu Forma- tion to the Yanwangdian Formation， while the index of compositional variabitlity (ICV) is decreased， which reflects the weathering was getting strong and the compositional maturity was increasing gradually from Yangmu Formation to Yanwangdian Formation． The contents and ratios of some major elements (SiO 2 = 69. 95%，TiO 2 = 0. 58%， TFe 2 O 3 + MgO =5. 34% and Al 2 O 3 /SiO 2 =0. 21) and trace elements (La = 37. 54 × 10 －6 ，Ce = 72. 83 × 10 －6 ， δEu =0. 60 and ΣREE =182. 29 ×10 －6 )，and the REE distribution patterns，are similar to those of clastic rocks deposited in the active continental margin． This is supported by ploting of the geochemical values of samples in dif- ferent tectonic discrimination diagrams． All these indicate that the Huangsong Group was deposited in the active continental margin． |
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| Keywords: | Jiamusi- - Khanka massif Huangsong Group metamophic rock geochemical characteristics tec- tonic environment Heilongjiang |
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