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| 新疆富蕴县苏普特一带片麻岩地球化学特征及锆石U-Pb SHRIMP定年 | |
| 引用本文： | 雷永孝,周刚,秦纪华,张立武,虞卫东,何立新.新疆富蕴县苏普特一带片麻岩地球化学特征及锆石U-Pb SHRIMP定年[J].西北地质,2010,43(1):44-53. |
| 作者姓名： | 雷永孝 周刚 秦纪华 张立武 虞卫东 何立新 |
| 作者单位： | 1. 西安地质矿产研究所,陕西,西安,710054 2. 新疆维吾尔自治区地质矿产勘查开发局第四地质大队,新疆,阿勒泰,836500 3. 新疆宝地矿业公司,新疆,乌鲁木齐,830000 |
| 基金项目： | 新疆富蕴县苏普特一带1:5万区域地质矿产调查 |
| 摘 要： | 苏普特片麻岩为含堇青石、矽线石及红柱石等变质矿物的眼球状、条纹条带状黑云斜长片麻岩、黑云二长片麻岩、二云母片麻岩等。其SiO2含量为63.12%~68.34%,Al2O3为13.64%~15.91%,TiO2为0.538%~0.772%,TFe2O3为6%左右,MgO含量较高,多数样品为3%左右。根据其岩石化学特征判断,原岩为泥质岩、砂岩等沉积岩。苏普特片麻岩稀土元素含量较高,ΣREE为155.21×10-6~271.93×10-6,轻稀土元素富集,具中等程度的负Eu异常;在以北美页岩(NASC)标准化的稀土配分型式图上具有较平缓的配分曲线,无明显的Ce、Eu异常。依据地球化学特征,推断其原岩的形成环境为活动大陆边缘。苏普特片麻岩中锆石具有岩浆锆石特征,其U-Pb SHRIMP年龄为282 Ma,可能代表了早二叠世的一次构造-岩浆-混合岩化事件。 |
| 关 键 词： | 苏普特片麻岩 地球化学 锆石U-Pb SH RIMP定年 |
Geochemistry and Zircon SHRIMP U-Pb Dating for Gneiss in Fuyun-Supute Belt of Xingjiang |
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| LEI Yong-xiao,ZHOU Gang,QIN Ji-hua,ZHANG Li-wu,YU Wei-dong,HE Li-xin.Geochemistry and Zircon SHRIMP U-Pb Dating for Gneiss in Fuyun-Supute Belt of Xingjiang[J].Northwestern Geology,2010,43(1):44-53. | |
| Authors: | LEI Yong-xiao ZHOU Gang QIN Ji-hua ZHANG Li-wu YU Wei-dong HE Li-xin |
| Institution: | LEI Yong-xiao1,ZHOU Gang2,QIN Ji-hua2,ZHANG Li-wu2,YU Wei-dong3,HE Li-xin2(1.Xian Institute of Geology and Mineral Resources,Xi'an 710054,China,2.No.4 Geology Pary of Xinjing Bureau of Geology and Mineral Reources,Altay,836500,3.Baodi Mining Company,Urumqi 83000,China) |
| Abstract: | The Supute gneiss complex is composed of andalusite,sillimanite,and cordierite.It contains SiO2 ranging from 63.1% to 68.3%,Al2O3 from 13.64% to 15.91%,TiO2 from 0.53% to 0.77%,and relatively high MgO(mostly ~3%).In line with their geochemical composition,they are metamorphized products of greywackes.For the trace elements,their total REE ranges from 155ppm to 272ppm and the LREE are enriched relative to the HREE with middle Eu negative anomalies.NASC normalized REE patterns of the Supute gneiss are coheren... |
| Keywords: | Supute gneiss geochemistry zircon SHRIMP U-Pb age |
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