现代地质 ›› 2020, Vol. 34 ›› Issue (06): 1245-1260.DOI: 10.19657/j.geoscience.1000-8527.2020.029
寇少磊(), 魏立勇, 张振, 李国英, 郑鑫, 路宗悦, 杨瀚文, 孟五一
出版日期:
2020-12-22
发布日期:
2020-12-22
作者简介:
寇少磊,男,助理工程师,1990年出生,矿物学、岩石学、矿床学专业,主要从事矿产调查方面的研究工作。Email:koushaolei665511@163.com。
基金资助:
KOU Shaolei(), WEI Liyong, ZHANG Zhen, LI Guoying, ZHENG Xin, LU Zongyue, YANG Hanwen, MENG Wuyi
Online:
2020-12-22
Published:
2020-12-22
摘要:
日多玛花岗闪长岩体位于西秦岭中段美武岩体附近,对该岩体进行了岩相学、锆石U-Pb年代学和岩石地球化学方面的研究。日多玛花岗闪长岩体含有较丰富的暗色微粒包体,花岗闪长岩和暗色微粒包体LA-ICP-MS锆石U-Pb年龄分别为(236.8±3.6) Ma(MSWD=4.1)和(242.7±1.6) Ma(MSWD=1.4),属于印支早期。日多玛岩体具有富钾(2.58%~2.75%)、富碱(Na2O+K2O=5.57%~5.76%)、弱过铝质(A/CNK=1.48~1.51)特征,属于高钾钙碱性I型花岗岩类。日多玛岩体稀土元素表现为轻重稀土元素分馏较明显(LREE/HREE=10.4~11.9)、呈右倾特征,具有中等Eu负异常(δEu=0.68~0.81),岩石富集K、Rb、Ba、Th和U等大离子亲石元素,明显亏损Nb、Ta、Ti和P等高场强元素。岩石地球化学特征表明,日多玛花岗闪长岩来源于下地壳高钾玄武质岩石的部分熔融。此外,花岗闪长岩体具有较高的Mg#(57~61)、Cr(149×10-6~185×10-6)和Ni(36×10-6~47×10-6),显示有少量幔源物质加入,暗色微粒包体可能代表了这种幔源岩浆。结合区域地质背景分析,认为日多玛花岗闪长岩体形成于后碰撞构造环境,可能与俯冲洋壳的断离作用有关。
中图分类号:
寇少磊, 魏立勇, 张振, 李国英, 郑鑫, 路宗悦, 杨瀚文, 孟五一. 西秦岭中段日多玛岩体锆石U-Pb年龄、地球化学特征及其构造意义[J]. 现代地质, 2020, 34(06): 1245-1260.
KOU Shaolei, WEI Liyong, ZHANG Zhen, LI Guoying, ZHENG Xin, LU Zongyue, YANG Hanwen, MENG Wuyi. Zircon U-Pb Ages, Geochemical Characteristics and Tectonic Implications of the Riduoma Granodiorite in the Middle Section of Western Qinling Orogen[J]. Geoscience, 2020, 34(06): 1245-1260.
图1 西秦岭造山带((a),据冯益民等[7],有修改)及研究区地质简图((b),据骆必继[16],有修改)
Fig.1 Simplified geological map of the Western Qingling Orogen ((a), modified after Feng et al.[7]) and the study area ((b), modified after Luo et al.[16])
图2 日多玛花岗闪长岩、暗色微粒包体野外及镜下照片 (a)花岗闪长岩体;(b)暗色微粒包体;(c)、(e)单偏光和正交偏光镜下花岗闪长岩特征;(d)、(f)单偏光和正交偏光镜下暗色微粒包体特征;(g)外接触带附近烘烤边;(h)外接触带附近绿泥石化现象;Q. 石英;Bi. 黑云母;Pl. 斜长石;Alf. 碱性长石;Am. 角闪石
Fig.2 Photos of Riduoma granodiorite and mafic microgranular enclaves in the field and microscopic photos
图5 暗色微粒包体(样品BTTW8)锆石的阴极发光(CL)图像和其表面年龄(Ma)
Fig.5 Cathodoluminescence (CL) images and the ages (Ma) of representative zircons from mafic microgranular enclaves
图7 花岗闪长岩和暗色微粒包体的SiO2-(Na2O +K2O)图解(底图据Middlemost[21])
Fig.7 SiO2-(Na2O+K2O) plot for the Riduoma granodiorite and mafic microgranular enclaves (base map after Middlemost[21])
图8 岩体和暗色微粒包体岩石系列判别图((a)底图据Rickwood[22])和岩石铝饱和指数判别图((b)底图据Maniar等[23])
Fig.8 SiO2-K2O plot ((a) base map after Rickwood[22]) and A/CNK-A/NK plot (b) (base map after Maniar et al[23]) for the intrusion and mafic microgranular enclaves
样品编号 | SiO2 | Al2O3 | TFe2O3 | MgO | CaO | Na2O | K2O | TiO2 | MnO | P2O5 | 烧失量 | 总量 | Mg# | ALK | Na2O/K2O | δ | A/NK | A/CNK |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RD01HX1 | 62.19 | 15.71 | 5.96 | 3.53 | 4.74 | 3.04 | 2.60 | 0.59 | 0.08 | 0.11 | 0.65 | 99.19 | 58 | 5.64 | 1.17 | 1.65 | 2.79 | 1.52 |
RD01HX2 | 63.37 | 15.75 | 6.23 | 3.51 | 4.53 | 3.02 | 2.75 | 0.58 | 0.08 | 0.10 | 0.67 | 100.58 | 57 | 5.77 | 1.10 | 1.63 | 2.73 | 1.53 |
RD01HX3 | 63.85 | 15.92 | 5.58 | 3.61 | 4.72 | 3.08 | 2.68 | 0.59 | 0.08 | 0.11 | 0.51 | 100.73 | 60 | 5.77 | 1.15 | 1.59 | 2.76 | 1.52 |
RD01HX4 | 62.94 | 15.83 | 6.15 | 3.61 | 4.82 | 3.06 | 2.64 | 0.60 | 0.08 | 0.11 | 0.53 | 100.36 | 58 | 5.69 | 1.16 | 1.63 | 2.78 | 1.51 |
RD01HX5 | 62.51 | 15.67 | 5.32 | 3.54 | 4.55 | 2.91 | 2.66 | 0.60 | 0.07 | 0.11 | 0.84 | 98.78 | 61 | 5.57 | 1.09 | 1.59 | 2.81 | 1.55 |
RD01HX6 | 63.26 | 15.87 | 5.47 | 3.60 | 4.67 | 3.04 | 2.66 | 0.60 | 0.08 | 0.11 | 0.60 | 99.96 | 61 | 5.70 | 1.14 | 1.60 | 2.79 | 1.53 |
RD01HX7 | 62.61 | 15.60 | 5.61 | 3.66 | 4.84 | 2.99 | 2.69 | 0.59 | 0.08 | 0.10 | 0.68 | 99.46 | 60 | 5.69 | 1.11 | 1.65 | 2.74 | 1.48 |
RD01HX8 | 62.68 | 15.80 | 5.42 | 3.58 | 4.81 | 3.03 | 2.71 | 0.59 | 0.08 | 0.11 | 0.65 | 99.45 | 61 | 5.74 | 1.12 | 1.67 | 2.76 | 1.50 |
RD02HX5 | 61.64 | 16.04 | 5.66 | 3.71 | 4.99 | 3.15 | 2.60 | 0.61 | 0.08 | 0.11 | 0.50 | 99.10 | 60 | 5.75 | 1.21 | 1.78 | 2.79 | 1.49 |
RD02HX6 | 61.45 | 15.99 | 6.20 | 3.69 | 5.04 | 3.09 | 2.61 | 0.61 | 0.08 | 0.11 | 0.48 | 99.36 | 58 | 5.70 | 1.19 | 1.76 | 2.81 | 1.49 |
RD02HX7 | 61.03 | 15.78 | 6.19 | 3.70 | 4.92 | 3.04 | 2.58 | 0.62 | 0.08 | 0.11 | 0.47 | 98.51 | 58 | 5.62 | 1.18 | 1.75 | 2.81 | 1.50 |
RD02HX8 | 61.09 | 15.99 | 6.10 | 3.73 | 4.99 | 3.11 | 2.59 | 0.62 | 0.08 | 0.11 | 0.53 | 98.94 | 59 | 5.70 | 1.20 | 1.80 | 2.81 | 1.50 |
BTHX1 | 54.52 | 15.71 | 7.82 | 7.21 | 7.23 | 3.42 | 1.78 | 0.64 | 0.11 | 0.11 | 1.67 | 100.20 | 68 | 5.20 | 1.93 | 2.35 | 3.02 | 1.26 |
BTHX2 | 55.38 | 15.46 | 7.96 | 6.51 | 6.00 | 3.43 | 2.70 | 0.72 | 0.11 | 0.12 | 1.65 | 100.00 | 66 | 6.13 | 1.27 | 3.04 | 2.52 | 1.27 |
BTHX3 | 54.47 | 14.91 | 8.60 | 7.39 | 7.37 | 3.25 | 1.57 | 0.70 | 0.14 | 0.11 | 1.11 | 99.60 | 67 | 4.82 | 2.07 | 2.03 | 3.09 | 1.22 |
BTHX4 | 55.71 | 15.94 | 7.68 | 6.58 | 6.72 | 3.66 | 1.85 | 0.70 | 0.11 | 0.15 | 1.22 | 100.30 | 67 | 5.51 | 1.98 | 2.38 | 2.90 | 1.30 |
BTHX5 | 56.67 | 15.50 | 7.98 | 6.76 | 6.93 | 3.14 | 1.95 | 0.65 | 0.13 | 0.14 | 0.86 | 100.70 | 67 | 5.09 | 1.61 | 1.89 | 3.05 | 1.29 |
BTHX6 | 57.48 | 15.99 | 6.96 | 5.77 | 6.64 | 3.37 | 1.93 | 0.72 | 0.12 | 0.10 | 0.96 | 100.00 | 66 | 5.30 | 1.75 | 1.94 | 3.02 | 1.34 |
表2 日多玛花岗闪长岩和暗色微粒包体主量元素(wB/%)元素分析结果
Table 2 Contents of major elements (wt.%) of the Riduoma granodiorite and mafic microgranular enclaves
样品编号 | SiO2 | Al2O3 | TFe2O3 | MgO | CaO | Na2O | K2O | TiO2 | MnO | P2O5 | 烧失量 | 总量 | Mg# | ALK | Na2O/K2O | δ | A/NK | A/CNK |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RD01HX1 | 62.19 | 15.71 | 5.96 | 3.53 | 4.74 | 3.04 | 2.60 | 0.59 | 0.08 | 0.11 | 0.65 | 99.19 | 58 | 5.64 | 1.17 | 1.65 | 2.79 | 1.52 |
RD01HX2 | 63.37 | 15.75 | 6.23 | 3.51 | 4.53 | 3.02 | 2.75 | 0.58 | 0.08 | 0.10 | 0.67 | 100.58 | 57 | 5.77 | 1.10 | 1.63 | 2.73 | 1.53 |
RD01HX3 | 63.85 | 15.92 | 5.58 | 3.61 | 4.72 | 3.08 | 2.68 | 0.59 | 0.08 | 0.11 | 0.51 | 100.73 | 60 | 5.77 | 1.15 | 1.59 | 2.76 | 1.52 |
RD01HX4 | 62.94 | 15.83 | 6.15 | 3.61 | 4.82 | 3.06 | 2.64 | 0.60 | 0.08 | 0.11 | 0.53 | 100.36 | 58 | 5.69 | 1.16 | 1.63 | 2.78 | 1.51 |
RD01HX5 | 62.51 | 15.67 | 5.32 | 3.54 | 4.55 | 2.91 | 2.66 | 0.60 | 0.07 | 0.11 | 0.84 | 98.78 | 61 | 5.57 | 1.09 | 1.59 | 2.81 | 1.55 |
RD01HX6 | 63.26 | 15.87 | 5.47 | 3.60 | 4.67 | 3.04 | 2.66 | 0.60 | 0.08 | 0.11 | 0.60 | 99.96 | 61 | 5.70 | 1.14 | 1.60 | 2.79 | 1.53 |
RD01HX7 | 62.61 | 15.60 | 5.61 | 3.66 | 4.84 | 2.99 | 2.69 | 0.59 | 0.08 | 0.10 | 0.68 | 99.46 | 60 | 5.69 | 1.11 | 1.65 | 2.74 | 1.48 |
RD01HX8 | 62.68 | 15.80 | 5.42 | 3.58 | 4.81 | 3.03 | 2.71 | 0.59 | 0.08 | 0.11 | 0.65 | 99.45 | 61 | 5.74 | 1.12 | 1.67 | 2.76 | 1.50 |
RD02HX5 | 61.64 | 16.04 | 5.66 | 3.71 | 4.99 | 3.15 | 2.60 | 0.61 | 0.08 | 0.11 | 0.50 | 99.10 | 60 | 5.75 | 1.21 | 1.78 | 2.79 | 1.49 |
RD02HX6 | 61.45 | 15.99 | 6.20 | 3.69 | 5.04 | 3.09 | 2.61 | 0.61 | 0.08 | 0.11 | 0.48 | 99.36 | 58 | 5.70 | 1.19 | 1.76 | 2.81 | 1.49 |
RD02HX7 | 61.03 | 15.78 | 6.19 | 3.70 | 4.92 | 3.04 | 2.58 | 0.62 | 0.08 | 0.11 | 0.47 | 98.51 | 58 | 5.62 | 1.18 | 1.75 | 2.81 | 1.50 |
RD02HX8 | 61.09 | 15.99 | 6.10 | 3.73 | 4.99 | 3.11 | 2.59 | 0.62 | 0.08 | 0.11 | 0.53 | 98.94 | 59 | 5.70 | 1.20 | 1.80 | 2.81 | 1.50 |
BTHX1 | 54.52 | 15.71 | 7.82 | 7.21 | 7.23 | 3.42 | 1.78 | 0.64 | 0.11 | 0.11 | 1.67 | 100.20 | 68 | 5.20 | 1.93 | 2.35 | 3.02 | 1.26 |
BTHX2 | 55.38 | 15.46 | 7.96 | 6.51 | 6.00 | 3.43 | 2.70 | 0.72 | 0.11 | 0.12 | 1.65 | 100.00 | 66 | 6.13 | 1.27 | 3.04 | 2.52 | 1.27 |
BTHX3 | 54.47 | 14.91 | 8.60 | 7.39 | 7.37 | 3.25 | 1.57 | 0.70 | 0.14 | 0.11 | 1.11 | 99.60 | 67 | 4.82 | 2.07 | 2.03 | 3.09 | 1.22 |
BTHX4 | 55.71 | 15.94 | 7.68 | 6.58 | 6.72 | 3.66 | 1.85 | 0.70 | 0.11 | 0.15 | 1.22 | 100.30 | 67 | 5.51 | 1.98 | 2.38 | 2.90 | 1.30 |
BTHX5 | 56.67 | 15.50 | 7.98 | 6.76 | 6.93 | 3.14 | 1.95 | 0.65 | 0.13 | 0.14 | 0.86 | 100.70 | 67 | 5.09 | 1.61 | 1.89 | 3.05 | 1.29 |
BTHX6 | 57.48 | 15.99 | 6.96 | 5.77 | 6.64 | 3.37 | 1.93 | 0.72 | 0.12 | 0.10 | 0.96 | 100.00 | 66 | 5.30 | 1.75 | 1.94 | 3.02 | 1.34 |
样品编号 | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Y | LREE | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RD01HX1 | 31.90 | 63.50 | 6.78 | 25.25 | 4.79 | 1.02 | 4.18 | 0.63 | 3.26 | 0.65 | 1.81 | 0.28 | 1.75 | 0.25 | 16.60 | 133.24 | |||||||||||||||
RD01HX2 | 31.90 | 63.00 | 7.04 | 25.05 | 4.36 | 1.03 | 3.94 | 0.59 | 3.14 | 0.61 | 1.68 | 0.26 | 1.69 | 0.25 | 15.40 | 132.38 | |||||||||||||||
RD01HX3 | 33.60 | 66.40 | 7.45 | 27.89 | 4.91 | 1.11 | 3.90 | 0.60 | 3.19 | 0.62 | 1.77 | 0.28 | 1.76 | 0.27 | 15.80 | 141.36 | |||||||||||||||
RD01HX4 | 32.00 | 63.60 | 7.13 | 27.16 | 4.89 | 1.12 | 4.19 | 0.62 | 3.23 | 0.58 | 1.57 | 0.25 | 1.60 | 0.25 | 15.90 | 135.90 | |||||||||||||||
RD01HX5 | 32.10 | 63.40 | 7.02 | 26.80 | 4.71 | 1.10 | 4.05 | 0.60 | 2.91 | 0.56 | 1.60 | 0.25 | 1.62 | 0.25 | 15.80 | 135.13 | |||||||||||||||
RD01HX6 | 33.90 | 67.20 | 7.43 | 28.39 | 4.89 | 1.11 | 4.24 | 0.61 | 3.03 | 0.58 | 1.65 | 0.26 | 1.67 | 0.26 | 16.40 | 142.92 | |||||||||||||||
RD01HX7 | 36.20 | 71.70 | 7.87 | 30.22 | 5.36 | 1.22 | 4.25 | 0.63 | 3.38 | 0.65 | 1.83 | 0.29 | 1.88 | 0.28 | 16.90 | 152.57 | |||||||||||||||
RD01HX8 | 35.00 | 68.50 | 7.69 | 28.45 | 4.75 | 1.01 | 4.12 | 0.61 | 3.29 | 0.65 | 1.79 | 0.28 | 1.80 | 0.27 | 15.80 | 145.40 | |||||||||||||||
RD02HX5 | 32.70 | 62.80 | 6.99 | 26.20 | 4.52 | 1.08 | 4.06 | 0.59 | 3.11 | 0.60 | 1.63 | 0.24 | 1.51 | 0.23 | 14.90 | 134.29 | |||||||||||||||
RD02HX6 | 34.40 | 67.70 | 7.65 | 28.51 | 4.91 | 1.16 | 3.99 | 0.57 | 3.05 | 0.60 | 1.65 | 0.26 | 1.67 | 0.25 | 15.10 | 144.33 | |||||||||||||||
RD02HX7 | 26.50 | 52.90 | 6.12 | 23.01 | 4.12 | 1.04 | 3.62 | 0.53 | 2.70 | 0.51 | 1.35 | 0.20 | 1.32 | 0.20 | 13.00 | 113.69 | |||||||||||||||
RD02HX8 | 31.90 | 62.60 | 7.17 | 27.04 | 4.84 | 1.21 | 4.29 | 0.62 | 3.25 | 0.62 | 1.63 | 0.24 | 1.53 | 0.24 | 15.50 | 134.76 | |||||||||||||||
BTHX1 | 19.25 | 44.78 | 6.10 | 24.61 | 5.92 | 1.10 | 5.26 | 0.93 | 5.24 | 1.02 | 2.79 | 0.44 | 2.69 | 0.41 | 26.97 | 101.76 | |||||||||||||||
BTHX2 | 29.84 | 70.70 | 8.76 | 33.75 | 6.74 | 0.92 | 5.86 | 0.96 | 5.30 | 1.05 | 2.88 | 0.46 | 2.96 | 0.45 | 28.69 | 150.70 | |||||||||||||||
BTHX3 | 22.71 | 54.82 | 7.47 | 28.94 | 6.38 | 1.11 | 5.47 | 0.92 | 4.92 | 0.95 | 2.53 | 0.40 | 2.40 | 0.36 | 24.80 | 121.43 | |||||||||||||||
BTHX4 | 27.30 | 66.40 | 8.15 | 30.47 | 6.29 | 1.00 | 5.53 | 0.88 | 4.71 | 0.92 | 2.54 | 0.40 | 2.53 | 0.40 | 25.08 | 139.61 | |||||||||||||||
BTHX5 | 25.75 | 64.96 | 8.20 | 30.70 | 6.34 | 1.14 | 5.45 | 0.87 | 4.71 | 0.91 | 2.50 | 0.40 | 2.49 | 0.38 | 24.47 | 137.10 | |||||||||||||||
BTHX6 | 27.85 | 71.69 | 9.17 | 36.19 | 7.65 | 1.28 | 6.34 | 1.02 | 5.17 | 1.04 | 2.84 | 0.44 | 2.58 | 0.38 | 28.49 | 153.84 | |||||||||||||||
样品编号 | HREE | LREE/ HREE | ∑REE | (La/ Yb)N | (La/ Sm)N | (Gd/ Yb)N | δEu | δCe | Ba | Be | Co | Cr | Cs | Cu | Ga | ||||||||||||||||
RD01HX1 | 12.81 | 10.40 | 146.05 | 13.08 | 4.30 | 1.98 | 0.68 | 1.01 | 629.00 | 2.98 | 16.70 | 158.00 | 9.78 | 10.30 | 21.20 | ||||||||||||||||
RD01HX2 | 12.16 | 10.89 | 144.54 | 13.54 | 4.72 | 1.93 | 0.75 | 0.99 | 598.00 | 2.89 | 15.60 | 156.00 | 9.31 | 10.90 | 19.40 | ||||||||||||||||
RD01HX3 | 12.39 | 11.41 | 153.75 | 13.69 | 4.30 | 1.83 | 0.75 | 0.99 | 595.00 | 2.36 | 14.10 | 152.00 | 12.00 | 10.50 | 19.20 | ||||||||||||||||
RD01HX4 | 12.29 | 11.06 | 148.19 | 14.35 | 4.22 | 2.17 | 0.74 | 0.99 | 593.00 | 2.69 | 16.00 | 175.00 | 13.50 | 12.90 | 20.30 | ||||||||||||||||
RD01HX5 | 11.84 | 11.41 | 146.97 | 14.21 | 4.40 | 2.07 | 0.75 | 0.99 | 587.00 | 2.39 | 16.50 | 164.00 | 9.16 | 11.30 | 19.50 | ||||||||||||||||
RD01HX6 | 12.30 | 11.62 | 155.22 | 14.56 | 4.30 | 2.10 | 0.73 | 0.99 | 626.00 | 2.67 | 14.40 | 168.00 | 12.60 | 25.50 | 20.30 | ||||||||||||||||
RD01HX7 | 13.19 | 11.57 | 165.76 | 13.81 | 4.36 | 1.87 | 0.76 | 0.99 | 665.00 | 2.58 | 16.10 | 185.00 | 10.90 | 12.50 | 21.10 | ||||||||||||||||
RD01HX8 | 12.81 | 11.35 | 158.21 | 13.95 | 4.30 | 1.89 | 0.68 | 0.98 | 591.00 | 2.54 | 16.10 | 176.00 | 9.48 | 24.90 | 18.80 | ||||||||||||||||
RD02HX5 | 11.97 | 11.22 | 146.26 | 15.53 | 4.67 | 2.22 | 0.76 | 0.97 | 594.00 | 2.57 | 14.30 | 158.00 | 10.30 | 12.70 | 19.10 | ||||||||||||||||
RD02HX6 | 12.04 | 11.99 | 156.37 | 14.78 | 4.30 | 1.98 | 0.78 | 0.98 | 601.00 | 2.42 | 15.90 | 167.00 | 10.50 | 42.40 | 20.30 | ||||||||||||||||
RD02HX7 | 10.43 | 10.90 | 124.12 | 14.40 | 4.15 | 2.27 | 0.81 | 0.98 | 539.00 | 2.35 | 13.80 | 149.00 | 9.71 | 27.50 | 18.60 | ||||||||||||||||
RD02HX8 | 12.42 | 10.85 | 147.18 | 14.96 | 4.25 | 2.32 | 0.79 | 0.97 | 642.00 | 2.64 | 16.10 | 172.00 | 11.20 | 38.20 | 21.60 | ||||||||||||||||
BTHX1 | 18.79 | 5.42 | 120.55 | 5.13 | 2.10 | 1.62 | 0.59 | 1.01 | 356.49 | 2.69 | 22.11 | 410.50 | 21.85 | 9.85 | 19.58 | ||||||||||||||||
BTHX2 | 19.92 | 7.57 | 170.62 | 7.24 | 2.86 | 1.64 | 0.44 | 1.06 | 544.59 | 3.21 | 22.03 | 293.55 | 16.25 | 32.75 | 18.55 | ||||||||||||||||
BTHX3 | 17.96 | 6.76 | 139.39 | 6.80 | 2.30 | 1.89 | 0.56 | 1.03 | 335.88 | 2.69 | 26.93 | 452.49 | 18.41 | 91.59 | 19.79 | ||||||||||||||||
BTHX4 | 17.91 | 7.80 | 157.51 | 7.73 | 2.80 | 1.80 | 0.51 | 1.08 | 475.83 | 3.26 | 24.65 | 280.73 | 17.09 | 39.18 | 20.94 | ||||||||||||||||
BTHX5 | 17.72 | 7.74 | 154.82 | 7.41 | 2.62 | 1.81 | 0.58 | 1.09 | 491.49 | 3.00 | 23.45 | 349.70 | 13.67 | 59.41 | 19.92 | ||||||||||||||||
BTHX6 | 19.81 | 7.76 | 173.66 | 7.75 | 2.35 | 2.03 | 0.55 | 1.09 | 461.79 | 3.24 | 21.97 | 287.66 | 13.12 | 29.43 | 21.95 | ||||||||||||||||
样品编号 | Hf | Li | Nb | Ni | Pb | Rb | Sc | Sr | Ta | Th | U | V | Zn | Zr | Sr/Y | ||||||||||||||||
RD01HX1 | 4.64 | 50.00 | 12.10 | 40.10 | 20.70 | 108.00 | 14.40 | 399.00 | 0.80 | 11.10 | 1.36 | 75.00 | 65.60 | 155.00 | 24.04 | ||||||||||||||||
RD01HX2 | 4.46 | 48.30 | 10.80 | 38.90 | 21.20 | 115.00 | 13.00 | 375.00 | 0.74 | 11.90 | 1.30 | 72.00 | 62.60 | 159.00 | 24.35 | ||||||||||||||||
RD01HX3 | 4.96 | 49.60 | 11.00 | 35.40 | 17.70 | 117.00 | 12.70 | 395.00 | 0.85 | 12.30 | 1.52 | 71.20 | 49.20 | 161.00 | 25.00 | ||||||||||||||||
RD01HX4 | 4.89 | 50.10 | 11.70 | 46.60 | 18.60 | 121.00 | 12.50 | 359.00 | 0.83 | 11.30 | 1.91 | 74.20 | 56.80 | 176.00 | 22.58 | ||||||||||||||||
RD01HX5 | 5.13 | 50.30 | 11.30 | 40.40 | 18.20 | 113.00 | 12.20 | 381.00 | 0.80 | 12.20 | 2.40 | 74.20 | 57.00 | 185.00 | 24.11 | ||||||||||||||||
RD01HX6 | 5.44 | 54.90 | 11.60 | 39.10 | 14.90 | 122.00 | 12.80 | 400.00 | 0.82 | 12.50 | 1.93 | 76.40 | 49.40 | 197.00 | 24.39 | ||||||||||||||||
样品编号 | Hf | Li | Nb | Ni | Pb | Rb | Sc | Sr | Ta | Th | U | V | Zn | Zr | Sr/Y | ||||||||||||||||
RD01HX7 | 5.34 | 53.00 | 11.80 | 44.30 | 21.40 | 124.00 | 14.10 | 418.00 | 0.89 | 13.40 | 1.62 | 80.50 | 58.50 | 180.00 | 24.73 | ||||||||||||||||
RD01HX8 | 5.30 | 47.60 | 10.80 | 41.10 | 20.20 | 123.00 | 13.10 | 376.00 | 0.79 | 13.20 | 1.91 | 75.60 | 55.10 | 180.00 | 23.80 | ||||||||||||||||
RD02HX5 | 4.37 | 46.90 | 10.60 | 38.00 | 20.00 | 119.00 | 12.20 | 380.00 | 0.76 | 13.00 | 1.57 | 72.80 | 52.40 | 157.00 | 25.50 | ||||||||||||||||
RD02HX6 | 4.97 | 41.90 | 10.70 | 39.30 | 17.40 | 110.00 | 13.60 | 393.00 | 0.76 | 12.40 | 1.56 | 80.30 | 51.60 | 170.00 | 26.03 | ||||||||||||||||
RD02HX7 | 4.18 | 38.60 | 9.93 | 36.40 | 14.90 | 101.00 | 11.40 | 345.00 | 0.65 | 9.28 | 1.18 | 71.70 | 48.90 | 151.00 | 26.54 | ||||||||||||||||
RD02HX8 | 5.05 | 43.30 | 11.30 | 41.50 | 17.60 | 116.00 | 13.90 | 403.00 | 0.76 | 11.30 | 1.33 | 83.20 | 56.50 | 184.00 | 26.00 | ||||||||||||||||
BTHX1 | 3.85 | 47.00 | 10.58 | 87.27 | 16.79 | 108.67 | 19.07 | 321.29 | 0.61 | 4.92 | 1.19 | 108.72 | 65.80 | 130.24 | 11.91 | ||||||||||||||||
BTHX2 | 4.18 | 52.48 | 11.77 | 59.48 | 13.07 | 135.07 | 19.57 | 264.58 | 0.79 | 5.61 | 1.34 | 110.52 | 55.71 | 140.34 | 9.22 | ||||||||||||||||
BTHX3 | 4.11 | 50.36 | 10.15 | 87.13 | 20.97 | 87.07 | 19.31 | 303.24 | 0.56 | 4.87 | 1.18 | 123.66 | 86.48 | 145.24 | 12.23 | ||||||||||||||||
BTHX4 | 3.76 | 68.18 | 11.88 | 80.60 | 18.00 | 111.07 | 20.94 | 335.64 | 0.79 | 5.40 | 1.34 | 106.83 | 65.88 | 135.63 | 13.38 | ||||||||||||||||
BTHX5 | 3.79 | 58.76 | 10.46 | 71.59 | 23.53 | 88.54 | 20.47 | 351.88 | 0.96 | 4.15 | 1.10 | 102.51 | 87.08 | 125.24 | 14.38 | ||||||||||||||||
BTHX6 | 4.31 | 55.26 | 13.17 | 56.70 | 28.46 | 88.49 | 24.36 | 428.26 | 0.90 | 5.32 | 1.05 | 115.11 | 81.74 | 147.49 | 15.03 |
表3 日多玛花岗闪长岩和暗色微粒包体微量元素和稀土元素分析结果(wB/10-6)
Table 3 Contents of trace elements and REE of the Riduoma granodiorite and mafic microgranular enclaves(10-6)
样品编号 | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Y | LREE | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RD01HX1 | 31.90 | 63.50 | 6.78 | 25.25 | 4.79 | 1.02 | 4.18 | 0.63 | 3.26 | 0.65 | 1.81 | 0.28 | 1.75 | 0.25 | 16.60 | 133.24 | |||||||||||||||
RD01HX2 | 31.90 | 63.00 | 7.04 | 25.05 | 4.36 | 1.03 | 3.94 | 0.59 | 3.14 | 0.61 | 1.68 | 0.26 | 1.69 | 0.25 | 15.40 | 132.38 | |||||||||||||||
RD01HX3 | 33.60 | 66.40 | 7.45 | 27.89 | 4.91 | 1.11 | 3.90 | 0.60 | 3.19 | 0.62 | 1.77 | 0.28 | 1.76 | 0.27 | 15.80 | 141.36 | |||||||||||||||
RD01HX4 | 32.00 | 63.60 | 7.13 | 27.16 | 4.89 | 1.12 | 4.19 | 0.62 | 3.23 | 0.58 | 1.57 | 0.25 | 1.60 | 0.25 | 15.90 | 135.90 | |||||||||||||||
RD01HX5 | 32.10 | 63.40 | 7.02 | 26.80 | 4.71 | 1.10 | 4.05 | 0.60 | 2.91 | 0.56 | 1.60 | 0.25 | 1.62 | 0.25 | 15.80 | 135.13 | |||||||||||||||
RD01HX6 | 33.90 | 67.20 | 7.43 | 28.39 | 4.89 | 1.11 | 4.24 | 0.61 | 3.03 | 0.58 | 1.65 | 0.26 | 1.67 | 0.26 | 16.40 | 142.92 | |||||||||||||||
RD01HX7 | 36.20 | 71.70 | 7.87 | 30.22 | 5.36 | 1.22 | 4.25 | 0.63 | 3.38 | 0.65 | 1.83 | 0.29 | 1.88 | 0.28 | 16.90 | 152.57 | |||||||||||||||
RD01HX8 | 35.00 | 68.50 | 7.69 | 28.45 | 4.75 | 1.01 | 4.12 | 0.61 | 3.29 | 0.65 | 1.79 | 0.28 | 1.80 | 0.27 | 15.80 | 145.40 | |||||||||||||||
RD02HX5 | 32.70 | 62.80 | 6.99 | 26.20 | 4.52 | 1.08 | 4.06 | 0.59 | 3.11 | 0.60 | 1.63 | 0.24 | 1.51 | 0.23 | 14.90 | 134.29 | |||||||||||||||
RD02HX6 | 34.40 | 67.70 | 7.65 | 28.51 | 4.91 | 1.16 | 3.99 | 0.57 | 3.05 | 0.60 | 1.65 | 0.26 | 1.67 | 0.25 | 15.10 | 144.33 | |||||||||||||||
RD02HX7 | 26.50 | 52.90 | 6.12 | 23.01 | 4.12 | 1.04 | 3.62 | 0.53 | 2.70 | 0.51 | 1.35 | 0.20 | 1.32 | 0.20 | 13.00 | 113.69 | |||||||||||||||
RD02HX8 | 31.90 | 62.60 | 7.17 | 27.04 | 4.84 | 1.21 | 4.29 | 0.62 | 3.25 | 0.62 | 1.63 | 0.24 | 1.53 | 0.24 | 15.50 | 134.76 | |||||||||||||||
BTHX1 | 19.25 | 44.78 | 6.10 | 24.61 | 5.92 | 1.10 | 5.26 | 0.93 | 5.24 | 1.02 | 2.79 | 0.44 | 2.69 | 0.41 | 26.97 | 101.76 | |||||||||||||||
BTHX2 | 29.84 | 70.70 | 8.76 | 33.75 | 6.74 | 0.92 | 5.86 | 0.96 | 5.30 | 1.05 | 2.88 | 0.46 | 2.96 | 0.45 | 28.69 | 150.70 | |||||||||||||||
BTHX3 | 22.71 | 54.82 | 7.47 | 28.94 | 6.38 | 1.11 | 5.47 | 0.92 | 4.92 | 0.95 | 2.53 | 0.40 | 2.40 | 0.36 | 24.80 | 121.43 | |||||||||||||||
BTHX4 | 27.30 | 66.40 | 8.15 | 30.47 | 6.29 | 1.00 | 5.53 | 0.88 | 4.71 | 0.92 | 2.54 | 0.40 | 2.53 | 0.40 | 25.08 | 139.61 | |||||||||||||||
BTHX5 | 25.75 | 64.96 | 8.20 | 30.70 | 6.34 | 1.14 | 5.45 | 0.87 | 4.71 | 0.91 | 2.50 | 0.40 | 2.49 | 0.38 | 24.47 | 137.10 | |||||||||||||||
BTHX6 | 27.85 | 71.69 | 9.17 | 36.19 | 7.65 | 1.28 | 6.34 | 1.02 | 5.17 | 1.04 | 2.84 | 0.44 | 2.58 | 0.38 | 28.49 | 153.84 | |||||||||||||||
样品编号 | HREE | LREE/ HREE | ∑REE | (La/ Yb)N | (La/ Sm)N | (Gd/ Yb)N | δEu | δCe | Ba | Be | Co | Cr | Cs | Cu | Ga | ||||||||||||||||
RD01HX1 | 12.81 | 10.40 | 146.05 | 13.08 | 4.30 | 1.98 | 0.68 | 1.01 | 629.00 | 2.98 | 16.70 | 158.00 | 9.78 | 10.30 | 21.20 | ||||||||||||||||
RD01HX2 | 12.16 | 10.89 | 144.54 | 13.54 | 4.72 | 1.93 | 0.75 | 0.99 | 598.00 | 2.89 | 15.60 | 156.00 | 9.31 | 10.90 | 19.40 | ||||||||||||||||
RD01HX3 | 12.39 | 11.41 | 153.75 | 13.69 | 4.30 | 1.83 | 0.75 | 0.99 | 595.00 | 2.36 | 14.10 | 152.00 | 12.00 | 10.50 | 19.20 | ||||||||||||||||
RD01HX4 | 12.29 | 11.06 | 148.19 | 14.35 | 4.22 | 2.17 | 0.74 | 0.99 | 593.00 | 2.69 | 16.00 | 175.00 | 13.50 | 12.90 | 20.30 | ||||||||||||||||
RD01HX5 | 11.84 | 11.41 | 146.97 | 14.21 | 4.40 | 2.07 | 0.75 | 0.99 | 587.00 | 2.39 | 16.50 | 164.00 | 9.16 | 11.30 | 19.50 | ||||||||||||||||
RD01HX6 | 12.30 | 11.62 | 155.22 | 14.56 | 4.30 | 2.10 | 0.73 | 0.99 | 626.00 | 2.67 | 14.40 | 168.00 | 12.60 | 25.50 | 20.30 | ||||||||||||||||
RD01HX7 | 13.19 | 11.57 | 165.76 | 13.81 | 4.36 | 1.87 | 0.76 | 0.99 | 665.00 | 2.58 | 16.10 | 185.00 | 10.90 | 12.50 | 21.10 | ||||||||||||||||
RD01HX8 | 12.81 | 11.35 | 158.21 | 13.95 | 4.30 | 1.89 | 0.68 | 0.98 | 591.00 | 2.54 | 16.10 | 176.00 | 9.48 | 24.90 | 18.80 | ||||||||||||||||
RD02HX5 | 11.97 | 11.22 | 146.26 | 15.53 | 4.67 | 2.22 | 0.76 | 0.97 | 594.00 | 2.57 | 14.30 | 158.00 | 10.30 | 12.70 | 19.10 | ||||||||||||||||
RD02HX6 | 12.04 | 11.99 | 156.37 | 14.78 | 4.30 | 1.98 | 0.78 | 0.98 | 601.00 | 2.42 | 15.90 | 167.00 | 10.50 | 42.40 | 20.30 | ||||||||||||||||
RD02HX7 | 10.43 | 10.90 | 124.12 | 14.40 | 4.15 | 2.27 | 0.81 | 0.98 | 539.00 | 2.35 | 13.80 | 149.00 | 9.71 | 27.50 | 18.60 | ||||||||||||||||
RD02HX8 | 12.42 | 10.85 | 147.18 | 14.96 | 4.25 | 2.32 | 0.79 | 0.97 | 642.00 | 2.64 | 16.10 | 172.00 | 11.20 | 38.20 | 21.60 | ||||||||||||||||
BTHX1 | 18.79 | 5.42 | 120.55 | 5.13 | 2.10 | 1.62 | 0.59 | 1.01 | 356.49 | 2.69 | 22.11 | 410.50 | 21.85 | 9.85 | 19.58 | ||||||||||||||||
BTHX2 | 19.92 | 7.57 | 170.62 | 7.24 | 2.86 | 1.64 | 0.44 | 1.06 | 544.59 | 3.21 | 22.03 | 293.55 | 16.25 | 32.75 | 18.55 | ||||||||||||||||
BTHX3 | 17.96 | 6.76 | 139.39 | 6.80 | 2.30 | 1.89 | 0.56 | 1.03 | 335.88 | 2.69 | 26.93 | 452.49 | 18.41 | 91.59 | 19.79 | ||||||||||||||||
BTHX4 | 17.91 | 7.80 | 157.51 | 7.73 | 2.80 | 1.80 | 0.51 | 1.08 | 475.83 | 3.26 | 24.65 | 280.73 | 17.09 | 39.18 | 20.94 | ||||||||||||||||
BTHX5 | 17.72 | 7.74 | 154.82 | 7.41 | 2.62 | 1.81 | 0.58 | 1.09 | 491.49 | 3.00 | 23.45 | 349.70 | 13.67 | 59.41 | 19.92 | ||||||||||||||||
BTHX6 | 19.81 | 7.76 | 173.66 | 7.75 | 2.35 | 2.03 | 0.55 | 1.09 | 461.79 | 3.24 | 21.97 | 287.66 | 13.12 | 29.43 | 21.95 | ||||||||||||||||
样品编号 | Hf | Li | Nb | Ni | Pb | Rb | Sc | Sr | Ta | Th | U | V | Zn | Zr | Sr/Y | ||||||||||||||||
RD01HX1 | 4.64 | 50.00 | 12.10 | 40.10 | 20.70 | 108.00 | 14.40 | 399.00 | 0.80 | 11.10 | 1.36 | 75.00 | 65.60 | 155.00 | 24.04 | ||||||||||||||||
RD01HX2 | 4.46 | 48.30 | 10.80 | 38.90 | 21.20 | 115.00 | 13.00 | 375.00 | 0.74 | 11.90 | 1.30 | 72.00 | 62.60 | 159.00 | 24.35 | ||||||||||||||||
RD01HX3 | 4.96 | 49.60 | 11.00 | 35.40 | 17.70 | 117.00 | 12.70 | 395.00 | 0.85 | 12.30 | 1.52 | 71.20 | 49.20 | 161.00 | 25.00 | ||||||||||||||||
RD01HX4 | 4.89 | 50.10 | 11.70 | 46.60 | 18.60 | 121.00 | 12.50 | 359.00 | 0.83 | 11.30 | 1.91 | 74.20 | 56.80 | 176.00 | 22.58 | ||||||||||||||||
RD01HX5 | 5.13 | 50.30 | 11.30 | 40.40 | 18.20 | 113.00 | 12.20 | 381.00 | 0.80 | 12.20 | 2.40 | 74.20 | 57.00 | 185.00 | 24.11 | ||||||||||||||||
RD01HX6 | 5.44 | 54.90 | 11.60 | 39.10 | 14.90 | 122.00 | 12.80 | 400.00 | 0.82 | 12.50 | 1.93 | 76.40 | 49.40 | 197.00 | 24.39 | ||||||||||||||||
样品编号 | Hf | Li | Nb | Ni | Pb | Rb | Sc | Sr | Ta | Th | U | V | Zn | Zr | Sr/Y | ||||||||||||||||
RD01HX7 | 5.34 | 53.00 | 11.80 | 44.30 | 21.40 | 124.00 | 14.10 | 418.00 | 0.89 | 13.40 | 1.62 | 80.50 | 58.50 | 180.00 | 24.73 | ||||||||||||||||
RD01HX8 | 5.30 | 47.60 | 10.80 | 41.10 | 20.20 | 123.00 | 13.10 | 376.00 | 0.79 | 13.20 | 1.91 | 75.60 | 55.10 | 180.00 | 23.80 | ||||||||||||||||
RD02HX5 | 4.37 | 46.90 | 10.60 | 38.00 | 20.00 | 119.00 | 12.20 | 380.00 | 0.76 | 13.00 | 1.57 | 72.80 | 52.40 | 157.00 | 25.50 | ||||||||||||||||
RD02HX6 | 4.97 | 41.90 | 10.70 | 39.30 | 17.40 | 110.00 | 13.60 | 393.00 | 0.76 | 12.40 | 1.56 | 80.30 | 51.60 | 170.00 | 26.03 | ||||||||||||||||
RD02HX7 | 4.18 | 38.60 | 9.93 | 36.40 | 14.90 | 101.00 | 11.40 | 345.00 | 0.65 | 9.28 | 1.18 | 71.70 | 48.90 | 151.00 | 26.54 | ||||||||||||||||
RD02HX8 | 5.05 | 43.30 | 11.30 | 41.50 | 17.60 | 116.00 | 13.90 | 403.00 | 0.76 | 11.30 | 1.33 | 83.20 | 56.50 | 184.00 | 26.00 | ||||||||||||||||
BTHX1 | 3.85 | 47.00 | 10.58 | 87.27 | 16.79 | 108.67 | 19.07 | 321.29 | 0.61 | 4.92 | 1.19 | 108.72 | 65.80 | 130.24 | 11.91 | ||||||||||||||||
BTHX2 | 4.18 | 52.48 | 11.77 | 59.48 | 13.07 | 135.07 | 19.57 | 264.58 | 0.79 | 5.61 | 1.34 | 110.52 | 55.71 | 140.34 | 9.22 | ||||||||||||||||
BTHX3 | 4.11 | 50.36 | 10.15 | 87.13 | 20.97 | 87.07 | 19.31 | 303.24 | 0.56 | 4.87 | 1.18 | 123.66 | 86.48 | 145.24 | 12.23 | ||||||||||||||||
BTHX4 | 3.76 | 68.18 | 11.88 | 80.60 | 18.00 | 111.07 | 20.94 | 335.64 | 0.79 | 5.40 | 1.34 | 106.83 | 65.88 | 135.63 | 13.38 | ||||||||||||||||
BTHX5 | 3.79 | 58.76 | 10.46 | 71.59 | 23.53 | 88.54 | 20.47 | 351.88 | 0.96 | 4.15 | 1.10 | 102.51 | 87.08 | 125.24 | 14.38 | ||||||||||||||||
BTHX6 | 4.31 | 55.26 | 13.17 | 56.70 | 28.46 | 88.49 | 24.36 | 428.26 | 0.90 | 5.32 | 1.05 | 115.11 | 81.74 | 147.49 | 15.03 |
图10 日多玛花岗闪长岩和暗色微粒包体稀土元素配分模式图(a)和微量元素蛛网图(b)(球粒陨石、原始地幔数据来自文献[24])
Fig.10 Chondrite-normalized REE pattern (a) and primitive mantle-normalized multi-element spidergram (b) for the Ri-duoma granodiorite and mafic microgranular enclaves (primitive-mantle and chondrite normalizing data after reference [24])
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