现代地质 ›› 2022, Vol. 36 ›› Issue (01): 282-294.DOI: 10.19657/j.geoscience.1000-8527.2021.046
周桐1,2,3(), 孙珍军1,2(
), 于赫楠1,2, 王承洋1,2, 刘广虎1,2
收稿日期:
2020-11-20
修回日期:
2021-11-10
出版日期:
2022-02-10
发布日期:
2022-03-08
通讯作者:
孙珍军
作者简介:
孙珍军,男,副教授,1982年出生,矿物学、岩石学、矿床学专业,主要从事矿床地质学、矿床地球化学研究。Email: 306292193@qq.com。基金资助:
ZHU Tong1,2,3(), SUN Zhenjun1,2(
), YU Henan1,2, WANG Chengyang1,2, LIU Guanghu1,2
Received:
2020-11-20
Revised:
2021-11-10
Online:
2022-02-10
Published:
2022-03-08
Contact:
SUN Zhenjun
摘要:
内蒙古赤峰浩布高铅锌矿床大地构造位置位于大兴安岭地区南段,属黄岗梁—甘珠尔庙褶皱成矿带。对浩布高铅锌矿床小罕山岩体进行了详细的岩石学、年代学、岩石地球化学和Hf同位素研究。结果显示:小罕山岩体主要岩石类型为二长花岗岩,形成于(143.9±1.1) Ma,属于早白垩世;地球化学组成上表现出高硅(SiO2=66.96%~68.05%)、富碱(Na2O+K2O=9.91%~10.09%)、弱铝(Al2O3=15.69%~16.49%)、低钙(CaO=1.22%~1.41%)及低TFe2O3/MgO值(平均值为8.29)的特征,属于准铝质到过铝质花岗岩;稀土元素配分曲线呈右倾轻稀土富集,δEu(0.33~0.41)表现为明显的负异常,总体表现出富集大离子亲石元素(Rb、K等元素)和不相容元素(Th、U等元素)、亏损高场强元素(Nb、P、Nb、Ta、Ti等元素)的特征,显示出A2型花岗岩属性。样品初始176Hf/177Hf值为0.282 829~0.282 936,平均值为0.282 888;εHf(t)范围在4.4~8.4之间,平均值为6.7,表明小罕山岩体主要源于中下地壳部分熔融,且有少量地幔物质加入。综合认为小罕山岩体的形成与早白垩世古太平洋板块俯冲大陆边缘的后碰撞伸展构造环境有关。
中图分类号:
周桐, 孙珍军, 于赫楠, 王承洋, 刘广虎. 内蒙古浩布高铅锌矿床小罕山岩体年代学、Hf同位素及地球化学特征[J]. 现代地质, 2022, 36(01): 282-294.
ZHU Tong, SUN Zhenjun, YU Henan, WANG Chengyang, LIU Guanghu. Zircon U-Pb Geochronology, Hf isotope and Whole-Rock Geochemical Characteristics of Xiaohanshan Pluton in Haobugao Pb-Zn Deposit, Inner Mongolia[J]. Geoscience, 2022, 36(01): 282-294.
图1 研究区大地构造位置图(a)和浩布高铅锌矿地质简图(b) (分别据参考文献[12]和[28]修改)
Fig.1 Tectonic map of the study area (a) and geologic map of the Haobugao lead-zinc deposit (b) (modified after references [12] and [28], respectively)
图3 小罕山岩体手标本(a)及正交偏光镜下照片(b) Pl.斜长石;Qtz.石英;Kf.钾长石
Fig.3 Hand-specimen photo (a) and thin-section photomicrograph (crossed-polar)(b) of the Xiaohanshan pluton
分析点号 | 含量/10-6 | Th/U | 同位素比值 | 年龄/Ma | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Th | U | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | ||
XHS-02-03 | 26 | 68 | 0.39 | 0.153 36 | 0.015 17 | 0.022 59 | 0.000 66 | 144.9 | 13.4 | 144.0 | 4.2 |
XHS-02-04 | 989 | 1167 | 0.85 | 0.156 51 | 0.004 92 | 0.022 40 | 0.000 41 | 147.6 | 4.3 | 142.8 | 2.6 |
XHS-02-05 | 165 | 466 | 0.35 | 0.148 07 | 0.005 50 | 0.022 35 | 0.000 41 | 140.2 | 4.9 | 142.5 | 2.6 |
XHS-02-06 | 651 | 777 | 0.84 | 0.155 88 | 0.004 10 | 0.022 33 | 0.000 39 | 147.1 | 3.6 | 142.3 | 2.5 |
XHS-02-07 | 117 | 324 | 0.36 | 0.156 13 | 0.004 63 | 0.022 56 | 0.000 36 | 147.3 | 4.1 | 143.8 | 2.3 |
XHS-02-08 | 202 | 534 | 0.38 | 0.155 15 | 0.004 59 | 0.022 48 | 0.000 39 | 146.4 | 4.0 | 143.3 | 2.5 |
XHS-02-09 | 719 | 650 | 1.11 | 0.156 90 | 0.005 63 | 0.022 79 | 0.000 41 | 148.0 | 4.9 | 145.2 | 2.6 |
XHS-02-10 | 154 | 450 | 0.34 | 0.151 25 | 0.004 65 | 0.022 48 | 0.000 41 | 143.0 | 4.1 | 143.3 | 2.6 |
XHS-02-11 | 212 | 297 | 0.71 | 0.148 68 | 0.007 04 | 0.022 47 | 0.000 44 | 140.7 | 6.2 | 143.2 | 2.7 |
XHS-02-12 | 263 | 643 | 0.41 | 0.154 01 | 0.004 71 | 0.022 72 | 0.000 44 | 145.4 | 4.1 | 144.8 | 2.8 |
XHS-02-13 | 189 | 426 | 0.44 | 0.153 81 | 0.005 38 | 0.022 72 | 0.000 40 | 145.3 | 4.7 | 144.8 | 2.5 |
XHS-02-14 | 82 | 118 | 0.70 | 0.147 22 | 0.007 13 | 0.022 61 | 0.000 47 | 139.5 | 6.3 | 144.1 | 3.0 |
XHS-02-15 | 164 | 506 | 0.32 | 0.151 08 | 0.005 37 | 0.022 64 | 0.000 35 | 142.9 | 4.7 | 144.3 | 2.2 |
XHS-02-16 | 176 | 490 | 0.36 | 0.153 86 | 0.007 54 | 0.022 71 | 0.000 52 | 145.3 | 6.6 | 144.7 | 3.3 |
XHS-02-17 | 188 | 501 | 0.37 | 0.154 01 | 0.006 00 | 0.022 68 | 0.000 49 | 145.4 | 5.3 | 144.6 | 3.1 |
XHS-02-18 | 108 | 341 | 0.32 | 0.153 60 | 0.007 03 | 0.022 78 | 0.000 41 | 145.1 | 6.2 | 145.2 | 2.6 |
XHS-02-20 | 421 | 798 | 0.53 | 0.155 54 | 0.003 54 | 0.022 58 | 0.000 36 | 146.8 | 3.1 | 144.0 | 2.3 |
XHS-02-21 | 148 | 157 | 0.95 | 0.152 18 | 0.010 33 | 0.022 44 | 0.000 43 | 143.8 | 9.1 | 143.1 | 2.7 |
XHS-02-22 | 148 | 436 | 0.34 | 0.155 08 | 0.006 60 | 0.022 64 | 0.000 45 | 146.4 | 5.8 | 144.3 | 2.8 |
XHS-02-24 | 269 | 458 | 0.59 | 0.155 02 | 0.004 63 | 0.022 51 | 0.000 35 | 146.3 | 4.1 | 143.5 | 2.2 |
表1 小罕山岩体(样品XHS-02)LA-ICP-MS锆石U-Pb定年数据
Table 1 LA-ICP-MS zircon U-Pb data for the Xiaohanshan pluton (Sample XHS-02)
分析点号 | 含量/10-6 | Th/U | 同位素比值 | 年龄/Ma | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Th | U | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | ||
XHS-02-03 | 26 | 68 | 0.39 | 0.153 36 | 0.015 17 | 0.022 59 | 0.000 66 | 144.9 | 13.4 | 144.0 | 4.2 |
XHS-02-04 | 989 | 1167 | 0.85 | 0.156 51 | 0.004 92 | 0.022 40 | 0.000 41 | 147.6 | 4.3 | 142.8 | 2.6 |
XHS-02-05 | 165 | 466 | 0.35 | 0.148 07 | 0.005 50 | 0.022 35 | 0.000 41 | 140.2 | 4.9 | 142.5 | 2.6 |
XHS-02-06 | 651 | 777 | 0.84 | 0.155 88 | 0.004 10 | 0.022 33 | 0.000 39 | 147.1 | 3.6 | 142.3 | 2.5 |
XHS-02-07 | 117 | 324 | 0.36 | 0.156 13 | 0.004 63 | 0.022 56 | 0.000 36 | 147.3 | 4.1 | 143.8 | 2.3 |
XHS-02-08 | 202 | 534 | 0.38 | 0.155 15 | 0.004 59 | 0.022 48 | 0.000 39 | 146.4 | 4.0 | 143.3 | 2.5 |
XHS-02-09 | 719 | 650 | 1.11 | 0.156 90 | 0.005 63 | 0.022 79 | 0.000 41 | 148.0 | 4.9 | 145.2 | 2.6 |
XHS-02-10 | 154 | 450 | 0.34 | 0.151 25 | 0.004 65 | 0.022 48 | 0.000 41 | 143.0 | 4.1 | 143.3 | 2.6 |
XHS-02-11 | 212 | 297 | 0.71 | 0.148 68 | 0.007 04 | 0.022 47 | 0.000 44 | 140.7 | 6.2 | 143.2 | 2.7 |
XHS-02-12 | 263 | 643 | 0.41 | 0.154 01 | 0.004 71 | 0.022 72 | 0.000 44 | 145.4 | 4.1 | 144.8 | 2.8 |
XHS-02-13 | 189 | 426 | 0.44 | 0.153 81 | 0.005 38 | 0.022 72 | 0.000 40 | 145.3 | 4.7 | 144.8 | 2.5 |
XHS-02-14 | 82 | 118 | 0.70 | 0.147 22 | 0.007 13 | 0.022 61 | 0.000 47 | 139.5 | 6.3 | 144.1 | 3.0 |
XHS-02-15 | 164 | 506 | 0.32 | 0.151 08 | 0.005 37 | 0.022 64 | 0.000 35 | 142.9 | 4.7 | 144.3 | 2.2 |
XHS-02-16 | 176 | 490 | 0.36 | 0.153 86 | 0.007 54 | 0.022 71 | 0.000 52 | 145.3 | 6.6 | 144.7 | 3.3 |
XHS-02-17 | 188 | 501 | 0.37 | 0.154 01 | 0.006 00 | 0.022 68 | 0.000 49 | 145.4 | 5.3 | 144.6 | 3.1 |
XHS-02-18 | 108 | 341 | 0.32 | 0.153 60 | 0.007 03 | 0.022 78 | 0.000 41 | 145.1 | 6.2 | 145.2 | 2.6 |
XHS-02-20 | 421 | 798 | 0.53 | 0.155 54 | 0.003 54 | 0.022 58 | 0.000 36 | 146.8 | 3.1 | 144.0 | 2.3 |
XHS-02-21 | 148 | 157 | 0.95 | 0.152 18 | 0.010 33 | 0.022 44 | 0.000 43 | 143.8 | 9.1 | 143.1 | 2.7 |
XHS-02-22 | 148 | 436 | 0.34 | 0.155 08 | 0.006 60 | 0.022 64 | 0.000 45 | 146.4 | 5.8 | 144.3 | 2.8 |
XHS-02-24 | 269 | 458 | 0.59 | 0.155 02 | 0.004 63 | 0.022 51 | 0.000 35 | 146.3 | 4.1 | 143.5 | 2.2 |
样品号 | SiO2 | Al2O3 | TFe2O3 | MgO | CaO | Na2O | K2O | MnO | TiO2 | P2O5 | 烧失量 | 总量 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
XHS-1 | 67.42 | 15.87 | 3.11 | 0.38 | 1.36 | 4.71 | 5.38 | 0.07 | 0.36 | 0.10 | 0.62 | 98.99 |
XHS-2 | 67.12 | 15.69 | 3.31 | 0.41 | 1.22 | 4.64 | 5.30 | 0.08 | 0.38 | 0.10 | 0.95 | 98.78 |
XHS-3 | 67.20 | 15.86 | 3.46 | 0.42 | 1.41 | 4.65 | 5.37 | 0.08 | 0.39 | 0.10 | 0.63 | 99.16 |
XHS-4 | 68.05 | 16.49 | 3.31 | 0.39 | 1.32 | 4.64 | 5.32 | 0.07 | 0.38 | 0.11 | 0.62 | 100.30 |
XHS-5 | 66.97 | 15.71 | 3.31 | 0.39 | 1.39 | 4.72 | 5.20 | 0.08 | 0.38 | 0.11 | 1.07 | 98.93 |
样品号 | Sc | V | Co | Ni | Zn | Ga | Rb | Sr | Zr | Nb | Cs | Ba |
XHS-1 | 7.62 | 14.18 | 1.92 | 6.72 | 61.94 | 22.12 | 110.98 | 139.42 | 439.91 | 9.06 | 5.98 | 779.80 |
XHS-2 | 8.13 | 16.43 | 3.22 | 37.37 | 111.11 | 23.41 | 121.61 | 139.72 | 452.24 | 10.26 | 6.91 | 733.44 |
XHS-3 | 8.47 | 17.33 | 2.65 | 9.55 | 85.91 | 22.63 | 110.99 | 135.20 | 451.93 | 9.66 | 7.89 | 811.02 |
XHS-4 | 7.99 | 16.24 | 2.78 | 12.97 | 94.63 | 23.84 | 110.94 | 152.48 | 468.80 | 9.80 | 6.01 | 810.71 |
XHS-5 | 7.68 | 16.44 | 2.37 | 7.16 | 79.53 | 22.41 | 105.54 | 141.22 | 452.39 | 9.56 | 5.68 | 736.50 |
样品号 | Hf | Ta | Pb | Th | U | Y | La | Ce | Pr | Nd | Sm | Eu |
XHS-1 | 9.78 | 0.75 | 16.19 | 10.07 | 2.17 | 27.22 | 54.90 | 113.38 | 11.89 | 43.39 | 7.20 | 0.85 |
XHS-2 | 10.03 | 0.83 | 21.86 | 10.99 | 2.79 | 29.92 | 58.34 | 122.85 | 12.85 | 46.04 | 7.55 | 0.80 |
XHS-3 | 10.05 | 0.77 | 18.13 | 11.16 | 2.25 | 29.09 | 57.11 | 116.25 | 12.55 | 46.42 | 8.16 | 0.92 |
XHS-4 | 10.18 | 0.78 | 19.71 | 9.69 | 2.38 | 28.64 | 48.84 | 100.66 | 11.23 | 41.11 | 7.25 | 0.93 |
XHS-5 | 10.02 | 0.77 | 16.30 | 9.88 | 2.60 | 27.73 | 49.09 | 102.75 | 11.26 | 40.98 | 7.06 | 0.82 |
样品号 | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | REE | δEu | (La/Yb)N | (Ce/Yb)N |
XHS-1 | 0.30 | 0.96 | 5.31 | 1.05 | 3.08 | 0.44 | 3.02 | 0.44 | 252.55 | 0.38 | 13.03 | 10.42 |
XHS-2 | 0.60 | 1.05 | 5.72 | 1.15 | 3.40 | 0.47 | 3.20 | 0.48 | 271.00 | 0.33 | 13.08 | 10.66 |
XHS-3 | 0.30 | 1.07 | 5.89 | 1.16 | 3.28 | 0.46 | 3.17 | 0.47 | 264.09 | 0.37 | 12.91 | 10.18 |
XHS-4 | 0.30 | 1.01 | 5.52 | 1.13 | 3.23 | 0.45 | 3.10 | 0.46 | 231.45 | 0.41 | 11.32 | 9.03 |
XHS-5 | 0.21 | 0.96 | 5.32 | 1.06 | 3.04 | 0.43 | 3.01 | 0.45 | 232.63 | 0.37 | 11.70 | 9.48 |
表2 小罕山岩体样品主量(%)、微量(10-6)及稀土元素分析数据
Table 2 Major(%), trace(10-6), and rare earth element(10-6) compositions of samples from the Xiaohanshan pluton
样品号 | SiO2 | Al2O3 | TFe2O3 | MgO | CaO | Na2O | K2O | MnO | TiO2 | P2O5 | 烧失量 | 总量 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
XHS-1 | 67.42 | 15.87 | 3.11 | 0.38 | 1.36 | 4.71 | 5.38 | 0.07 | 0.36 | 0.10 | 0.62 | 98.99 |
XHS-2 | 67.12 | 15.69 | 3.31 | 0.41 | 1.22 | 4.64 | 5.30 | 0.08 | 0.38 | 0.10 | 0.95 | 98.78 |
XHS-3 | 67.20 | 15.86 | 3.46 | 0.42 | 1.41 | 4.65 | 5.37 | 0.08 | 0.39 | 0.10 | 0.63 | 99.16 |
XHS-4 | 68.05 | 16.49 | 3.31 | 0.39 | 1.32 | 4.64 | 5.32 | 0.07 | 0.38 | 0.11 | 0.62 | 100.30 |
XHS-5 | 66.97 | 15.71 | 3.31 | 0.39 | 1.39 | 4.72 | 5.20 | 0.08 | 0.38 | 0.11 | 1.07 | 98.93 |
样品号 | Sc | V | Co | Ni | Zn | Ga | Rb | Sr | Zr | Nb | Cs | Ba |
XHS-1 | 7.62 | 14.18 | 1.92 | 6.72 | 61.94 | 22.12 | 110.98 | 139.42 | 439.91 | 9.06 | 5.98 | 779.80 |
XHS-2 | 8.13 | 16.43 | 3.22 | 37.37 | 111.11 | 23.41 | 121.61 | 139.72 | 452.24 | 10.26 | 6.91 | 733.44 |
XHS-3 | 8.47 | 17.33 | 2.65 | 9.55 | 85.91 | 22.63 | 110.99 | 135.20 | 451.93 | 9.66 | 7.89 | 811.02 |
XHS-4 | 7.99 | 16.24 | 2.78 | 12.97 | 94.63 | 23.84 | 110.94 | 152.48 | 468.80 | 9.80 | 6.01 | 810.71 |
XHS-5 | 7.68 | 16.44 | 2.37 | 7.16 | 79.53 | 22.41 | 105.54 | 141.22 | 452.39 | 9.56 | 5.68 | 736.50 |
样品号 | Hf | Ta | Pb | Th | U | Y | La | Ce | Pr | Nd | Sm | Eu |
XHS-1 | 9.78 | 0.75 | 16.19 | 10.07 | 2.17 | 27.22 | 54.90 | 113.38 | 11.89 | 43.39 | 7.20 | 0.85 |
XHS-2 | 10.03 | 0.83 | 21.86 | 10.99 | 2.79 | 29.92 | 58.34 | 122.85 | 12.85 | 46.04 | 7.55 | 0.80 |
XHS-3 | 10.05 | 0.77 | 18.13 | 11.16 | 2.25 | 29.09 | 57.11 | 116.25 | 12.55 | 46.42 | 8.16 | 0.92 |
XHS-4 | 10.18 | 0.78 | 19.71 | 9.69 | 2.38 | 28.64 | 48.84 | 100.66 | 11.23 | 41.11 | 7.25 | 0.93 |
XHS-5 | 10.02 | 0.77 | 16.30 | 9.88 | 2.60 | 27.73 | 49.09 | 102.75 | 11.26 | 40.98 | 7.06 | 0.82 |
样品号 | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | REE | δEu | (La/Yb)N | (Ce/Yb)N |
XHS-1 | 0.30 | 0.96 | 5.31 | 1.05 | 3.08 | 0.44 | 3.02 | 0.44 | 252.55 | 0.38 | 13.03 | 10.42 |
XHS-2 | 0.60 | 1.05 | 5.72 | 1.15 | 3.40 | 0.47 | 3.20 | 0.48 | 271.00 | 0.33 | 13.08 | 10.66 |
XHS-3 | 0.30 | 1.07 | 5.89 | 1.16 | 3.28 | 0.46 | 3.17 | 0.47 | 264.09 | 0.37 | 12.91 | 10.18 |
XHS-4 | 0.30 | 1.01 | 5.52 | 1.13 | 3.23 | 0.45 | 3.10 | 0.46 | 231.45 | 0.41 | 11.32 | 9.03 |
XHS-5 | 0.21 | 0.96 | 5.32 | 1.06 | 3.04 | 0.43 | 3.01 | 0.45 | 232.63 | 0.37 | 11.70 | 9.48 |
点号 | t/Ma | 176Lu/177Hf | 176Yb/177Hf | 176Hf/177Hf | 1σ | εHf(t) | TDM1/Ma | TDM2/Ma |
---|---|---|---|---|---|---|---|---|
XHS-02-03 | 144.0 | 0.001 562 | 0.060 470 | 0.282 897 | 0.000 019 | 7.02 | 510.45 | 723.57 |
XHS-02-04 | 142.8 | 0.002 278 | 0.090 737 | 0.282 882 | 0.000 016 | 6.40 | 542.38 | 762.29 |
XHS-02-05 | 142.5 | 0.001 236 | 0.047 621 | 0.282 894 | 0.000 017 | 6.90 | 510.89 | 730.21 |
XHS-02-06 | 142.3 | 0.001 776 | 0.067 297 | 0.282 829 | 0.000 019 | 4.54 | 612.77 | 881.02 |
XHS-02-07 | 143.8 | 0.002 251 | 0.088 018 | 0.282 861 | 0.000 021 | 5.68 | 572.94 | 809.34 |
XHS-02-08 | 143.3 | 0.002 070 | 0.085 905 | 0.282 923 | 0.000 021 | 7.88 | 479.62 | 668.22 |
XHS-02-10 | 143.3 | 0.001 053 | 0.040 029 | 0.282 870 | 0.000 017 | 6.09 | 542.17 | 782.46 |
XHS-02-11 | 143.2 | 0.002 322 | 0.089 539 | 0.282 889 | 0.000 021 | 6.63 | 533.63 | 747.85 |
XHS-02-14 | 144.1 | 0.000 649 | 0.023 870 | 0.282 884 | 0.000 017 | 6.63 | 517.26 | 748.71 |
XHS-02-15 | 144.3 | 0.000 978 | 0.034 827 | 0.282 916 | 0.000 020 | 7.76 | 475.49 | 676.66 |
XHS-02-17 | 144.6 | 0.000 989 | 0.039 083 | 0.282 874 | 0.000 015 | 6.28 | 534.95 | 771.27 |
XHS-02-20 | 144 | 0.001 411 | 0.055 054 | 0.282 870 | 0.000 017 | 6.09 | 546.86 | 783.39 |
XHS-02-21 | 143.1 | 0.001 360 | 0.052 966 | 0.282 936 | 0.000 019 | 8.40 | 451.72 | 634.36 |
XHS-02-22 | 144.3 | 0.002 057 | 0.083 746 | 0.282 892 | 0.000 018 | 6.80 | 524.89 | 738.10 |
XHS-02-24 | 143.5 | 0.001 578 | 0.060 935 | 0.282 914 | 0.000 016 | 7.58 | 487.24 | 687.12 |
表3 小罕山岩体(样品XHS-02)锆石Hf同位素数据
Table 3 Zircon Hf isotopic data of the Xiaohanshan pluton (sample XHS-02)
点号 | t/Ma | 176Lu/177Hf | 176Yb/177Hf | 176Hf/177Hf | 1σ | εHf(t) | TDM1/Ma | TDM2/Ma |
---|---|---|---|---|---|---|---|---|
XHS-02-03 | 144.0 | 0.001 562 | 0.060 470 | 0.282 897 | 0.000 019 | 7.02 | 510.45 | 723.57 |
XHS-02-04 | 142.8 | 0.002 278 | 0.090 737 | 0.282 882 | 0.000 016 | 6.40 | 542.38 | 762.29 |
XHS-02-05 | 142.5 | 0.001 236 | 0.047 621 | 0.282 894 | 0.000 017 | 6.90 | 510.89 | 730.21 |
XHS-02-06 | 142.3 | 0.001 776 | 0.067 297 | 0.282 829 | 0.000 019 | 4.54 | 612.77 | 881.02 |
XHS-02-07 | 143.8 | 0.002 251 | 0.088 018 | 0.282 861 | 0.000 021 | 5.68 | 572.94 | 809.34 |
XHS-02-08 | 143.3 | 0.002 070 | 0.085 905 | 0.282 923 | 0.000 021 | 7.88 | 479.62 | 668.22 |
XHS-02-10 | 143.3 | 0.001 053 | 0.040 029 | 0.282 870 | 0.000 017 | 6.09 | 542.17 | 782.46 |
XHS-02-11 | 143.2 | 0.002 322 | 0.089 539 | 0.282 889 | 0.000 021 | 6.63 | 533.63 | 747.85 |
XHS-02-14 | 144.1 | 0.000 649 | 0.023 870 | 0.282 884 | 0.000 017 | 6.63 | 517.26 | 748.71 |
XHS-02-15 | 144.3 | 0.000 978 | 0.034 827 | 0.282 916 | 0.000 020 | 7.76 | 475.49 | 676.66 |
XHS-02-17 | 144.6 | 0.000 989 | 0.039 083 | 0.282 874 | 0.000 015 | 6.28 | 534.95 | 771.27 |
XHS-02-20 | 144 | 0.001 411 | 0.055 054 | 0.282 870 | 0.000 017 | 6.09 | 546.86 | 783.39 |
XHS-02-21 | 143.1 | 0.001 360 | 0.052 966 | 0.282 936 | 0.000 019 | 8.40 | 451.72 | 634.36 |
XHS-02-22 | 144.3 | 0.002 057 | 0.083 746 | 0.282 892 | 0.000 018 | 6.80 | 524.89 | 738.10 |
XHS-02-24 | 143.5 | 0.001 578 | 0.060 935 | 0.282 914 | 0.000 016 | 7.58 | 487.24 | 687.12 |
图4 小罕山岩体(样品XHS-02)锆石阴极发光(CL)图像(a)及年龄谐和图(b) (图4(a)中实线为U-Pb同位素测试点,虚线为Hf同位素测试点)
Fig.4 Zircon CL image (a) and concordia diagram (b) for the Xiaohanshan pluton (sample XHS-02)
图5 小罕山岩体样品TAS图解(a)和A/CNK-A/NK图解(b) (底图分别据文献[41]和[42]) 1.橄榄辉长岩;2a.碱性辉长岩;2b.亚碱性辉长岩;3.辉长闪长岩;4.闪长岩;5.花岗闪长岩;6.花岗岩;7.硅英岩;8.二长辉长岩;9.二长闪长岩;10.二长岩;11.石英二长岩;12.正长岩;13.副长石辉长岩;14.副长石二长闪长岩;15.副长石二长正长岩;16.副长正长岩;17.副长深成岩;18.霓方钠岩/磷霞岩/粗白榴岩
Fig. 5 TAS (a) and A/CNK-A/NK (b) diagrams of samples from the Xiaohanshan pluton (Base map after references [41] and [42], respectively)
图6 小罕山岩体样品稀土元素球粒陨石标准化配分图(a)和微量元素原始地幔标准化蛛网图(b)(标准化数据据文献[44])
Fig.6 Chondrite-normalized REE (a) and primitive-mantle normalized trace element spider diagrams (b) for samples from the Xiaohanshan pluton (Normalized data after reference [44])
图7 小罕山岩体样品εHf(t)-t和176Hf/177Hf-t图解(底图据文献[46]) εHf(t)-t和176Hf/177Hf-t (b) diagrams of samples from the Xiaohanshan pluton (base map after reference [46])
Fig.7
图8 小罕山岩体样品10000Ga/Al - Zr(a)和(Zr+Nb+Ce+Y)-(FeO+Fe2O3)/MgO图解(底图分别据文献[54]和[60]) FG.长英质花岗岩;OGT.末分馏的M型、I型和S型花岗岩
Fig.8 10000Ga/Al (a) -Zr and (Zr+Nb+Ce+Y) -(FeO+Fe2O3)/MgO(b) diagrams of samples from the Xiaohanshan pluton (base map after references [54] and [60], respectively)
图9 小罕山岩体样品δEu-(La/Yb)N (a) 和MgO-TFeO (b)图解(底图分别据文献[62]和[63])
Fig.9 δEu-(La/Yb)N (a) and MgO-TFeO (b) diagrams of samples from the Xiaohanshan pluton (base map after references [62] and [63], respectively)
图10 小罕山岩体样品Rb-(Y+Nb) (a)和Nb-Y-Ce (b)图解(底图分别据文献[53]和[60]) syn-COLG.同碰撞花岗岩;VAG.火山弧花岗岩;WPG.板内花岗岩;ORG.洋中脊花岗岩;A1.非造山A型花岗岩;A2.造山后A型花岗岩
Fig. 10 Rb-(Y+Nb) (a) and Nb-Y-Ce (b) diagrams of samples from the Xiaohanshan pluton (base map after references [53] and [60], respectively)
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