现代地质 ›› 2022, Vol. 36 ›› Issue (01): 266-281.DOI: 10.19657/j.geoscience.1000-8527.2021.066
符安宗1(), 杨文鹏1, 刘渊1, 赵寒冬1, 王贵鹏1, 石国明1, 李金明1, 邓昌州2
收稿日期:
2020-09-29
修回日期:
2021-04-22
出版日期:
2022-02-10
发布日期:
2022-03-08
作者简介:
符安宗,男,工程师,硕士,1986年出生,地质工程专业,从事区域地质矿产调查与研究工作。Email: 116861157@qq.com。
基金资助:
FU Anzong1(), YANG Wenpeng1, LIU Yuan1, ZHAO Handong1, WANG Guipeng1, SHI Guoming1, LI jinming1, DENG Changzhou2
Received:
2020-09-29
Revised:
2021-04-22
Online:
2022-02-10
Published:
2022-03-08
摘要:
为加深对大兴安岭中段早中生代构造背景的认识,选取碾子山地区早中生代花岗岩开展岩石学、年代学和元素地球化学研究。结果表明,该地区早中生代花岗岩岩石组合为正长花岗岩和石英二长岩,其LA-ICP-MS锆石U-Pb年龄为225.6~228.9 Ma,形成于晚三叠世。二者的地球化学特征与埃达克岩的地球化学特征非常类似,如高Al2O3、Sr含量和Sr/Y、La/Yb比值,低Y、Yb含量,亏损重稀土,弱负铕异常等。但是二者也存在明显的差别:石英二长岩比正长花岗岩具有更高的MgO、LREE 、Cr、V、Sr含量和Sr/Y、K/Rb比值。这种差别可能反映二者成因上的不同:正长花岗岩可能由增厚下地壳的部分熔融形成,而石英二长岩可能由拆沉下地壳部分熔融形成。结合前人发表的相关资料,认为碾子山地区晚三叠世埃达克质侵入岩是在兴安地块与松嫩地块碰撞造山的挤压背景下形成的,其形成受蒙古—鄂霍次克洋板块南向俯冲的影响。拆沉下地壳部分熔融形成的埃达克质侵入岩的发现,显示碾子山及其周边地区具有寻找斑岩型铜钼矿的潜力。
中图分类号:
符安宗, 杨文鹏, 刘渊, 赵寒冬, 王贵鹏, 石国明, 李金明, 邓昌州. 大兴安岭中段碾子山地区晚三叠世埃达克质侵入岩的发现及其地质意义[J]. 现代地质, 2022, 36(01): 266-281.
FU Anzong, YANG Wenpeng, LIU Yuan, ZHAO Handong, WANG Guipeng, SHI Guoming, LI jinming, DENG Changzhou. Discovery of Late Triassic Adakitic Rocks at Nianzishan in the Central Great Xing’an Range and Its Geological Significance[J]. Geoscience, 2022, 36(01): 266-281.
图1 大兴安岭中段大地构造简图((a),据文献[22-23]修改)和碾子山地区地质简图(b)
Fig.1 Tectonic map of the central Great Xing’an Range ((a), modified after refs.[22-23]) and geological map of the Nianzishan area (b)
图2 碾子山地区晚三叠世花岗岩类的标本及显微照片 (a)—(c)中细粒正长花岗岩标本照片及显微照片(正交偏光);(d)—(f)中细粒石英二长岩标本照片及显微照片(正交偏光)。Pl.斜长石;Kf.钾长石;Q.石英;Hb.角闪石
Fig.2 Specimen and thin-section micrographs of the Late Triassic Nianzishan granites
序号 | 样品编号 | 岩性 | 取样坐标 | 主要矿物组合 |
---|---|---|---|---|
1 | U-Pb3022 Gs3022 | 中细粒正长花岗岩 | N47°38'17.2″,E122°45'46.1″ | 石英+钾长石+ 斜长石+黑云母 |
2 | ||||
3 | U-Pb2064-2 Gs2064-2 | 中细粒正长花岗岩 | N47°39'16.5″,E122°55'07.7″ | |
4 | ||||
5 | Gs3010 | 中细粒正长花岗岩 | N47°39'41.4″,E122°45'14.5″ | |
6 | Gs4056 | N47°39'22.2″,E122°54'29.4″ | ||
7 | Gs4225 | N47°33'50.9″,E122°53'53.4″ | ||
8 | U-Pb8068 Gs8068 | 中细粒石英二长岩 | N47°36'12.9″,E122°52'22.4″ | 斜长石+钾长石+石英+ 角闪石+黑云母 |
9 | ||||
10 | Gs3132 | 中细粒石英二长岩 | N47°36'58.6″,E122°54'22.8″ |
表1 碾子山地区晚三叠世侵入岩样品信息
Table 1 Sample information of Late Triassic intrusive rocks at Nianzishan
序号 | 样品编号 | 岩性 | 取样坐标 | 主要矿物组合 |
---|---|---|---|---|
1 | U-Pb3022 Gs3022 | 中细粒正长花岗岩 | N47°38'17.2″,E122°45'46.1″ | 石英+钾长石+ 斜长石+黑云母 |
2 | ||||
3 | U-Pb2064-2 Gs2064-2 | 中细粒正长花岗岩 | N47°39'16.5″,E122°55'07.7″ | |
4 | ||||
5 | Gs3010 | 中细粒正长花岗岩 | N47°39'41.4″,E122°45'14.5″ | |
6 | Gs4056 | N47°39'22.2″,E122°54'29.4″ | ||
7 | Gs4225 | N47°33'50.9″,E122°53'53.4″ | ||
8 | U-Pb8068 Gs8068 | 中细粒石英二长岩 | N47°36'12.9″,E122°52'22.4″ | 斜长石+钾长石+石英+ 角闪石+黑云母 |
9 | ||||
10 | Gs3132 | 中细粒石英二长岩 | N47°36'58.6″,E122°54'22.8″ |
编号 | 点号 | 含量/10-6 | Th/U | 同位素比值 | 同位素年龄/Ma | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pb | Th | U | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | |||
Ⅰ | 1 | 14.0 | 139.6 | 187.1 | 0.75 | 0.050 9 | 0.001 4 | 0.252 4 | 0.009 2 | 0.036 0 | 0.001 2 | 234.4 | 62.0 | 228.5 | 7.5 | 227.9 | 7.3 |
2 | 23.8 | 226.3 | 336.1 | 0.67 | 0.049 9 | 0.001 2 | 0.245 8 | 0.008 5 | 0.035 8 | 0.001 2 | 187.8 | 56.3 | 223.2 | 6.9 | 226.5 | 7.2 | |
3 | 42.7 | 400.3 | 600.7 | 0.67 | 0.049 5 | 0.001 1 | 0.246 5 | 0.008 2 | 0.036 1 | 0.001 2 | 172.8 | 50.9 | 223.8 | 6.6 | 228.6 | 7.3 | |
4 | 58.5 | 466.5 | 868.4 | 0.54 | 0.052 3 | 0.001 1 | 0.266 1 | 0.008 7 | 0.036 9 | 0.001 2 | 296.3 | 47.8 | 239.6 | 6.9 | 233.8 | 7.4 | |
5 | 111.5 | 1053.1 | 1086.0 | 0.97 | 0.049 0 | 0.001 0 | 0.266 1 | 0.008 6 | 0.039 4 | 0.001 3 | 149.9 | 48.3 | 239.6 | 6.9 | 248.8 | 7.9 | |
6 | 48.4 | 498.4 | 517.6 | 0.96 | 0.049 9 | 0.001 1 | 0.247 0 | 0.008 2 | 0.035 9 | 0.001 2 | 191.9 | 51.7 | 224.1 | 6.7 | 227.2 | 7.2 | |
7 | 43.7 | 399.6 | 609.1 | 0.66 | 0.049 9 | 0.001 1 | 0.250 3 | 0.008 3 | 0.036 4 | 0.001 2 | 188.2 | 50.7 | 226.8 | 6.7 | 230.6 | 7.3 | |
8 | 50.8 | 478.4 | 749.2 | 0.64 | 0.048 9 | 0.001 2 | 0.243 4 | 0.008 6 | 0.036 1 | 0.001 2 | 143.6 | 58.3 | 221.2 | 7.0 | 228.6 | 7.3 | |
9 | 28.1 | 246.8 | 449.4 | 0.55 | 0.048 7 | 0.001 2 | 0.242 1 | 0.008 2 | 0.036 0 | 0.001 2 | 135.5 | 54.3 | 220.1 | 6.7 | 228.1 | 7.2 | |
10 | 23.5 | 216.1 | 323.8 | 0.67 | 0.050 7 | 0.001 3 | 0.249 7 | 0.008 9 | 0.035 7 | 0.001 2 | 228.5 | 60.0 | 226.4 | 7.3 | 226.1 | 7.2 | |
11 | 25.0 | 337.0 | 304.8 | 1.11 | 0.050 6 | 0.001 2 | 0.248 0 | 0.008 5 | 0.035 5 | 0.001 1 | 224.6 | 54.5 | 225.0 | 6.9 | 225.0 | 7.1 | |
12 | 9.4 | 129.2 | 160.2 | 0.81 | 0.051 8 | 0.001 4 | 0.251 8 | 0.009 2 | 0.035 3 | 0.001 1 | 275.3 | 61.4 | 228.0 | 7.4 | 223.5 | 7.1 | |
13 | 29.7 | 381.0 | 345.9 | 1.10 | 0.049 7 | 0.001 2 | 0.255 2 | 0.008 6 | 0.037 2 | 0.001 2 | 182.8 | 53.5 | 230.8 | 7.0 | 235.6 | 7.4 | |
15 | 14.8 | 166.6 | 254.5 | 0.65 | 0.051 5 | 0.001 3 | 0.256 6 | 0.008 8 | 0.036 1 | 0.001 2 | 263.7 | 55.4 | 231.9 | 7.1 | 228.8 | 7.2 | |
16 | 11.2 | 144.5 | 174.5 | 0.83 | 0.052 2 | 0.001 8 | 0.252 6 | 0.010 6 | 0.035 1 | 0.001 2 | 295.8 | 77.8 | 228.7 | 8.6 | 222.2 | 7.2 | |
17 | 26.7 | 250.3 | 575.4 | 0.43 | 0.050 8 | 0.001 1 | 0.255 1 | 0.008 4 | 0.036 4 | 0.001 2 | 231.5 | 50.7 | 230.7 | 6.8 | 230.6 | 7.2 | |
18 | 16.1 | 167.1 | 338.5 | 0.49 | 0.052 2 | 0.001 2 | 0.254 7 | 0.008 6 | 0.035 4 | 0.001 1 | 293.3 | 52.6 | 230.4 | 6.9 | 224.3 | 7.1 | |
19 | 14.1 | 166.2 | 213.7 | 0.78 | 0.052 2 | 0.001 4 | 0.256 4 | 0.009 2 | 0.035 6 | 0.001 2 | 293.5 | 59.6 | 231.8 | 7.4 | 225.8 | 7.2 | |
20 | 40.3 | 484.5 | 542.7 | 0.89 | 0.049 9 | 0.001 2 | 0.250 3 | 0.008 4 | 0.036 4 | 0.001 2 | 190.0 | 52.9 | 226.8 | 6.8 | 230.5 | 7.2 | |
Ⅱ | 3 | 13.9 | 247.2 | 261.9 | 0.94 | 0.049 9 | 0.002 1 | 0.244 4 | 0.010 1 | 0.035 5 | 0.000 8 | 191.6 | 94.8 | 222.0 | 8.2 | 224.9 | 4.7 |
4 | 19.3 | 255.2 | 308.8 | 0.83 | 0.053 5 | 0.001 5 | 0.261 3 | 0.007 2 | 0.035 4 | 0.000 7 | 350.5 | 62.0 | 235.7 | 5.8 | 224.4 | 4.4 | |
5 | 8.2 | 108.8 | 145.1 | 0.75 | 0.051 8 | 0.001 7 | 0.251 9 | 0.008 1 | 0.035 3 | 0.000 7 | 277.0 | 73.5 | 228.1 | 6.6 | 223.4 | 4.5 | |
6 | 20.6 | 299.9 | 435.2 | 0.69 | 0.050 9 | 0.001 2 | 0.247 7 | 0.005 9 | 0.035 3 | 0.000 7 | 234.6 | 54.8 | 224.7 | 4.8 | 223.7 | 4.4 | |
7 | 33.7 | 564.1 | 714.2 | 0.79 | 0.051 6 | 0.001 2 | 0.251 6 | 0.005 8 | 0.035 3 | 0.000 7 | 269.2 | 53.2 | 227.9 | 4.7 | 223.9 | 4.4 | |
8 | 18.8 | 316.8 | 346.4 | 0.91 | 0.054 5 | 0.001 5 | 0.264 2 | 0.007 2 | 0.035 2 | 0.000 7 | 390.4 | 61.2 | 238.0 | 5.8 | 222.9 | 4.4 | |
9 | 10.6 | 178.6 | 201.7 | 0.89 | 0.051 0 | 0.001 8 | 0.261 3 | 0.009 1 | 0.037 2 | 0.000 8 | 239.7 | 79.8 | 235.7 | 7.3 | 235.3 | 4.8 | |
10 | 40.4 | 818.4 | 757.0 | 1.08 | 0.051 6 | 0.001 7 | 0.243 2 | 0.007 7 | 0.034 2 | 0.000 7 | 268.3 | 72.7 | 221.0 | 6.3 | 216.6 | 4.4 | |
13 | 48.3 | 1341.9 | 783.5 | 1.71 | 0.052 3 | 0.001 9 | 0.257 4 | 0.009 3 | 0.035 7 | 0.000 7 | 298.1 | 81.6 | 232.6 | 7.5 | 226.2 | 4.6 | |
14 | 9.2 | 128.2 | 195.9 | 0.65 | 0.051 6 | 0.001 5 | 0.251 7 | 0.007 3 | 0.035 4 | 0.000 7 | 265.5 | 66.5 | 228.0 | 5.9 | 224.3 | 4.5 | |
15 | 10.6 | 164.7 | 149.6 | 1.10 | 0.054 1 | 0.002 3 | 0.264 3 | 0.011 0 | 0.035 5 | 0.000 8 | 372.9 | 92.0 | 238.1 | 8.8 | 224.7 | 4.8 | |
16 | 7.8 | 149.8 | 157.7 | 0.95 | 0.052 6 | 0.001 6 | 0.256 2 | 0.007 8 | 0.035 4 | 0.000 7 | 309.7 | 68.9 | 231.6 | 6.3 | 224.0 | 4.5 | |
17 | 12.2 | 155.7 | 232.7 | 0.67 | 0.049 7 | 0.001 5 | 0.245 9 | 0.007 4 | 0.035 9 | 0.000 7 | 181.4 | 69.9 | 223.2 | 6.0 | 227.2 | 4.6 | |
18 | 8.2 | 136.0 | 156.5 | 0.87 | 0.049 7 | 0.001 6 | 0.258 5 | 0.008 0 | 0.037 7 | 0.000 8 | 180.5 | 71.4 | 233.5 | 6.4 | 238.8 | 4.8 | |
20 | 7.3 | 113.1 | 154.5 | 0.73 | 0.052 4 | 0.001 9 | 0.259 8 | 0.009 0 | 0.036 0 | 0.000 8 | 301.7 | 78.6 | 234.5 | 7.3 | 227.8 | 4.7 | |
Ⅲ | 1 | 4.3 | 74.6 | 86.0 | 0.87 | 0.049 9 | 0.002 0 | 0.247 8 | 0.009 5 | 0.036 0 | 0.000 7 | 189.0 | 88.9 | 224.8 | 7.7 | 228.2 | 4.6 |
2 | 8.9 | 115.2 | 184.5 | 0.62 | 0.048 2 | 0.001 6 | 0.243 2 | 0.007 6 | 0.036 6 | 0.000 7 | 107.1 | 74.2 | 221.1 | 6.2 | 231.9 | 4.6 | |
3 | 3.7 | 52.9 | 75.0 | 0.71 | 0.050 0 | 0.002 1 | 0.250 5 | 0.010 4 | 0.036 3 | 0.000 8 | 195.6 | 95.7 | 227.0 | 8.4 | 230.0 | 4.7 | |
4 | 3.5 | 56.5 | 70.4 | 0.80 | 0.051 0 | 0.002 7 | 0.254 6 | 0.013 2 | 0.036 3 | 0.000 8 | 238.4 | 117.6 | 230.3 | 10.7 | 229.5 | 4.9 | |
5 | 4.4 | 75.9 | 85.4 | 0.89 | 0.052 6 | 0.002 1 | 0.262 1 | 0.010 3 | 0.036 1 | 0.000 8 | 312.7 | 89.4 | 236.3 | 8.3 | 228.7 | 4.7 | |
6 | 4.2 | 67.9 | 84.3 | 0.81 | 0.049 5 | 0.002 1 | 0.242 6 | 0.009 9 | 0.035 6 | 0.000 7 | 169.6 | 94.6 | 220.6 | 8.1 | 225.4 | 4.6 | |
7 | 4.0 | 59.9 | 80.4 | 0.75 | 0.053 6 | 0.004 7 | 0.265 4 | 0.022 7 | 0.035 9 | 0.001 0 | 352.8 | 186.1 | 239.0 | 18.2 | 227.6 | 6.1 | |
编号 | 点号 | 含量/10-6 | Th/U | 同位素比值 | 同位素年龄/Ma | ||||||||||||
Pb | Th | U | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | |||
Ⅲ | 9 | 3.5 | 49.2 | 72.5 | 0.68 | 0.049 7 | 0.002 1 | 0.244 3 | 0.010 0 | 0.035 7 | 0.000 7 | 180.1 | 94.4 | 221.9 | 8.1 | 225.9 | 4.6 |
10 | 4.4 | 73.8 | 85.8 | 0.86 | 0.050 4 | 0.001 9 | 0.250 9 | 0.009 4 | 0.036 1 | 0.000 7 | 215.3 | 86.7 | 227.3 | 7.6 | 228.5 | 4.6 | |
11 | 4.0 | 57.6 | 83.8 | 0.69 | 0.051 3 | 0.002 2 | 0.252 2 | 0.010 4 | 0.035 7 | 0.000 7 | 252.3 | 94.4 | 228.3 | 8.5 | 226.0 | 4.6 | |
12 | 4.1 | 66.5 | 81.3 | 0.82 | 0.053 7 | 0.002 1 | 0.265 4 | 0.010 3 | 0.035 8 | 0.000 7 | 359.4 | 86.9 | 239.0 | 8.2 | 227.0 | 4.6 | |
13 | 3.0 | 47.1 | 58.5 | 0.80 | 0.052 8 | 0.002 5 | 0.260 8 | 0.012 0 | 0.035 8 | 0.000 8 | 319.3 | 103.2 | 235.3 | 9.6 | 227.0 | 4.8 | |
14 | 4.2 | 65.0 | 86.4 | 0.75 | 0.052 3 | 0.002 2 | 0.257 1 | 0.010 3 | 0.035 7 | 0.000 7 | 297.1 | 91.2 | 232.3 | 8.3 | 226.0 | 4.6 | |
15 | 3.4 | 49.5 | 68.7 | 0.72 | 0.050 3 | 0.002 1 | 0.252 0 | 0.010 4 | 0.036 4 | 0.000 8 | 206.7 | 95.0 | 228.2 | 8.4 | 230.3 | 4.7 | |
16 | 4.0 | 61.3 | 81.1 | 0.76 | 0.049 2 | 0.002 1 | 0.243 5 | 0.009 9 | 0.035 9 | 0.000 7 | 157.1 | 94.6 | 221.3 | 8.1 | 227.3 | 4.6 | |
17 | 3.2 | 50.5 | 64.0 | 0.79 | 0.052 5 | 0.002 3 | 0.262 1 | 0.011 2 | 0.036 2 | 0.000 8 | 305.9 | 96.4 | 236.4 | 9.0 | 229.4 | 4.7 | |
18 | 4.0 | 51.3 | 83.8 | 0.61 | 0.050 1 | 0.002 0 | 0.250 0 | 0.009 6 | 0.036 2 | 0.000 8 | 198.3 | 88.9 | 226.5 | 7.8 | 229.3 | 4.6 | |
19 | 3.0 | 37.6 | 62.3 | 0.60 | 0.052 4 | 0.004 1 | 0.258 3 | 0.019 6 | 0.035 7 | 0.000 9 | 303.6 | 167.3 | 233.3 | 15.8 | 226.3 | 5.6 | |
20 | 4.7 | 72.6 | 94.0 | 0.77 | 0.051 0 | 0.001 9 | 0.251 8 | 0.009 2 | 0.035 8 | 0.000 7 | 240.0 | 84.0 | 228.0 | 7.5 | 226.8 | 4.6 |
表2 碾子山地区晚三叠世侵入岩锆石U-Pb年龄测试结果
Table 2 Zircon U-Pb dating results of the Late Triassic Nianzishan intrusive rocks
编号 | 点号 | 含量/10-6 | Th/U | 同位素比值 | 同位素年龄/Ma | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pb | Th | U | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | |||
Ⅰ | 1 | 14.0 | 139.6 | 187.1 | 0.75 | 0.050 9 | 0.001 4 | 0.252 4 | 0.009 2 | 0.036 0 | 0.001 2 | 234.4 | 62.0 | 228.5 | 7.5 | 227.9 | 7.3 |
2 | 23.8 | 226.3 | 336.1 | 0.67 | 0.049 9 | 0.001 2 | 0.245 8 | 0.008 5 | 0.035 8 | 0.001 2 | 187.8 | 56.3 | 223.2 | 6.9 | 226.5 | 7.2 | |
3 | 42.7 | 400.3 | 600.7 | 0.67 | 0.049 5 | 0.001 1 | 0.246 5 | 0.008 2 | 0.036 1 | 0.001 2 | 172.8 | 50.9 | 223.8 | 6.6 | 228.6 | 7.3 | |
4 | 58.5 | 466.5 | 868.4 | 0.54 | 0.052 3 | 0.001 1 | 0.266 1 | 0.008 7 | 0.036 9 | 0.001 2 | 296.3 | 47.8 | 239.6 | 6.9 | 233.8 | 7.4 | |
5 | 111.5 | 1053.1 | 1086.0 | 0.97 | 0.049 0 | 0.001 0 | 0.266 1 | 0.008 6 | 0.039 4 | 0.001 3 | 149.9 | 48.3 | 239.6 | 6.9 | 248.8 | 7.9 | |
6 | 48.4 | 498.4 | 517.6 | 0.96 | 0.049 9 | 0.001 1 | 0.247 0 | 0.008 2 | 0.035 9 | 0.001 2 | 191.9 | 51.7 | 224.1 | 6.7 | 227.2 | 7.2 | |
7 | 43.7 | 399.6 | 609.1 | 0.66 | 0.049 9 | 0.001 1 | 0.250 3 | 0.008 3 | 0.036 4 | 0.001 2 | 188.2 | 50.7 | 226.8 | 6.7 | 230.6 | 7.3 | |
8 | 50.8 | 478.4 | 749.2 | 0.64 | 0.048 9 | 0.001 2 | 0.243 4 | 0.008 6 | 0.036 1 | 0.001 2 | 143.6 | 58.3 | 221.2 | 7.0 | 228.6 | 7.3 | |
9 | 28.1 | 246.8 | 449.4 | 0.55 | 0.048 7 | 0.001 2 | 0.242 1 | 0.008 2 | 0.036 0 | 0.001 2 | 135.5 | 54.3 | 220.1 | 6.7 | 228.1 | 7.2 | |
10 | 23.5 | 216.1 | 323.8 | 0.67 | 0.050 7 | 0.001 3 | 0.249 7 | 0.008 9 | 0.035 7 | 0.001 2 | 228.5 | 60.0 | 226.4 | 7.3 | 226.1 | 7.2 | |
11 | 25.0 | 337.0 | 304.8 | 1.11 | 0.050 6 | 0.001 2 | 0.248 0 | 0.008 5 | 0.035 5 | 0.001 1 | 224.6 | 54.5 | 225.0 | 6.9 | 225.0 | 7.1 | |
12 | 9.4 | 129.2 | 160.2 | 0.81 | 0.051 8 | 0.001 4 | 0.251 8 | 0.009 2 | 0.035 3 | 0.001 1 | 275.3 | 61.4 | 228.0 | 7.4 | 223.5 | 7.1 | |
13 | 29.7 | 381.0 | 345.9 | 1.10 | 0.049 7 | 0.001 2 | 0.255 2 | 0.008 6 | 0.037 2 | 0.001 2 | 182.8 | 53.5 | 230.8 | 7.0 | 235.6 | 7.4 | |
15 | 14.8 | 166.6 | 254.5 | 0.65 | 0.051 5 | 0.001 3 | 0.256 6 | 0.008 8 | 0.036 1 | 0.001 2 | 263.7 | 55.4 | 231.9 | 7.1 | 228.8 | 7.2 | |
16 | 11.2 | 144.5 | 174.5 | 0.83 | 0.052 2 | 0.001 8 | 0.252 6 | 0.010 6 | 0.035 1 | 0.001 2 | 295.8 | 77.8 | 228.7 | 8.6 | 222.2 | 7.2 | |
17 | 26.7 | 250.3 | 575.4 | 0.43 | 0.050 8 | 0.001 1 | 0.255 1 | 0.008 4 | 0.036 4 | 0.001 2 | 231.5 | 50.7 | 230.7 | 6.8 | 230.6 | 7.2 | |
18 | 16.1 | 167.1 | 338.5 | 0.49 | 0.052 2 | 0.001 2 | 0.254 7 | 0.008 6 | 0.035 4 | 0.001 1 | 293.3 | 52.6 | 230.4 | 6.9 | 224.3 | 7.1 | |
19 | 14.1 | 166.2 | 213.7 | 0.78 | 0.052 2 | 0.001 4 | 0.256 4 | 0.009 2 | 0.035 6 | 0.001 2 | 293.5 | 59.6 | 231.8 | 7.4 | 225.8 | 7.2 | |
20 | 40.3 | 484.5 | 542.7 | 0.89 | 0.049 9 | 0.001 2 | 0.250 3 | 0.008 4 | 0.036 4 | 0.001 2 | 190.0 | 52.9 | 226.8 | 6.8 | 230.5 | 7.2 | |
Ⅱ | 3 | 13.9 | 247.2 | 261.9 | 0.94 | 0.049 9 | 0.002 1 | 0.244 4 | 0.010 1 | 0.035 5 | 0.000 8 | 191.6 | 94.8 | 222.0 | 8.2 | 224.9 | 4.7 |
4 | 19.3 | 255.2 | 308.8 | 0.83 | 0.053 5 | 0.001 5 | 0.261 3 | 0.007 2 | 0.035 4 | 0.000 7 | 350.5 | 62.0 | 235.7 | 5.8 | 224.4 | 4.4 | |
5 | 8.2 | 108.8 | 145.1 | 0.75 | 0.051 8 | 0.001 7 | 0.251 9 | 0.008 1 | 0.035 3 | 0.000 7 | 277.0 | 73.5 | 228.1 | 6.6 | 223.4 | 4.5 | |
6 | 20.6 | 299.9 | 435.2 | 0.69 | 0.050 9 | 0.001 2 | 0.247 7 | 0.005 9 | 0.035 3 | 0.000 7 | 234.6 | 54.8 | 224.7 | 4.8 | 223.7 | 4.4 | |
7 | 33.7 | 564.1 | 714.2 | 0.79 | 0.051 6 | 0.001 2 | 0.251 6 | 0.005 8 | 0.035 3 | 0.000 7 | 269.2 | 53.2 | 227.9 | 4.7 | 223.9 | 4.4 | |
8 | 18.8 | 316.8 | 346.4 | 0.91 | 0.054 5 | 0.001 5 | 0.264 2 | 0.007 2 | 0.035 2 | 0.000 7 | 390.4 | 61.2 | 238.0 | 5.8 | 222.9 | 4.4 | |
9 | 10.6 | 178.6 | 201.7 | 0.89 | 0.051 0 | 0.001 8 | 0.261 3 | 0.009 1 | 0.037 2 | 0.000 8 | 239.7 | 79.8 | 235.7 | 7.3 | 235.3 | 4.8 | |
10 | 40.4 | 818.4 | 757.0 | 1.08 | 0.051 6 | 0.001 7 | 0.243 2 | 0.007 7 | 0.034 2 | 0.000 7 | 268.3 | 72.7 | 221.0 | 6.3 | 216.6 | 4.4 | |
13 | 48.3 | 1341.9 | 783.5 | 1.71 | 0.052 3 | 0.001 9 | 0.257 4 | 0.009 3 | 0.035 7 | 0.000 7 | 298.1 | 81.6 | 232.6 | 7.5 | 226.2 | 4.6 | |
14 | 9.2 | 128.2 | 195.9 | 0.65 | 0.051 6 | 0.001 5 | 0.251 7 | 0.007 3 | 0.035 4 | 0.000 7 | 265.5 | 66.5 | 228.0 | 5.9 | 224.3 | 4.5 | |
15 | 10.6 | 164.7 | 149.6 | 1.10 | 0.054 1 | 0.002 3 | 0.264 3 | 0.011 0 | 0.035 5 | 0.000 8 | 372.9 | 92.0 | 238.1 | 8.8 | 224.7 | 4.8 | |
16 | 7.8 | 149.8 | 157.7 | 0.95 | 0.052 6 | 0.001 6 | 0.256 2 | 0.007 8 | 0.035 4 | 0.000 7 | 309.7 | 68.9 | 231.6 | 6.3 | 224.0 | 4.5 | |
17 | 12.2 | 155.7 | 232.7 | 0.67 | 0.049 7 | 0.001 5 | 0.245 9 | 0.007 4 | 0.035 9 | 0.000 7 | 181.4 | 69.9 | 223.2 | 6.0 | 227.2 | 4.6 | |
18 | 8.2 | 136.0 | 156.5 | 0.87 | 0.049 7 | 0.001 6 | 0.258 5 | 0.008 0 | 0.037 7 | 0.000 8 | 180.5 | 71.4 | 233.5 | 6.4 | 238.8 | 4.8 | |
20 | 7.3 | 113.1 | 154.5 | 0.73 | 0.052 4 | 0.001 9 | 0.259 8 | 0.009 0 | 0.036 0 | 0.000 8 | 301.7 | 78.6 | 234.5 | 7.3 | 227.8 | 4.7 | |
Ⅲ | 1 | 4.3 | 74.6 | 86.0 | 0.87 | 0.049 9 | 0.002 0 | 0.247 8 | 0.009 5 | 0.036 0 | 0.000 7 | 189.0 | 88.9 | 224.8 | 7.7 | 228.2 | 4.6 |
2 | 8.9 | 115.2 | 184.5 | 0.62 | 0.048 2 | 0.001 6 | 0.243 2 | 0.007 6 | 0.036 6 | 0.000 7 | 107.1 | 74.2 | 221.1 | 6.2 | 231.9 | 4.6 | |
3 | 3.7 | 52.9 | 75.0 | 0.71 | 0.050 0 | 0.002 1 | 0.250 5 | 0.010 4 | 0.036 3 | 0.000 8 | 195.6 | 95.7 | 227.0 | 8.4 | 230.0 | 4.7 | |
4 | 3.5 | 56.5 | 70.4 | 0.80 | 0.051 0 | 0.002 7 | 0.254 6 | 0.013 2 | 0.036 3 | 0.000 8 | 238.4 | 117.6 | 230.3 | 10.7 | 229.5 | 4.9 | |
5 | 4.4 | 75.9 | 85.4 | 0.89 | 0.052 6 | 0.002 1 | 0.262 1 | 0.010 3 | 0.036 1 | 0.000 8 | 312.7 | 89.4 | 236.3 | 8.3 | 228.7 | 4.7 | |
6 | 4.2 | 67.9 | 84.3 | 0.81 | 0.049 5 | 0.002 1 | 0.242 6 | 0.009 9 | 0.035 6 | 0.000 7 | 169.6 | 94.6 | 220.6 | 8.1 | 225.4 | 4.6 | |
7 | 4.0 | 59.9 | 80.4 | 0.75 | 0.053 6 | 0.004 7 | 0.265 4 | 0.022 7 | 0.035 9 | 0.001 0 | 352.8 | 186.1 | 239.0 | 18.2 | 227.6 | 6.1 | |
编号 | 点号 | 含量/10-6 | Th/U | 同位素比值 | 同位素年龄/Ma | ||||||||||||
Pb | Th | U | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | 207Pb/206Pb | 1σ | 207Pb/235U | 1σ | 206Pb/238U | 1σ | |||
Ⅲ | 9 | 3.5 | 49.2 | 72.5 | 0.68 | 0.049 7 | 0.002 1 | 0.244 3 | 0.010 0 | 0.035 7 | 0.000 7 | 180.1 | 94.4 | 221.9 | 8.1 | 225.9 | 4.6 |
10 | 4.4 | 73.8 | 85.8 | 0.86 | 0.050 4 | 0.001 9 | 0.250 9 | 0.009 4 | 0.036 1 | 0.000 7 | 215.3 | 86.7 | 227.3 | 7.6 | 228.5 | 4.6 | |
11 | 4.0 | 57.6 | 83.8 | 0.69 | 0.051 3 | 0.002 2 | 0.252 2 | 0.010 4 | 0.035 7 | 0.000 7 | 252.3 | 94.4 | 228.3 | 8.5 | 226.0 | 4.6 | |
12 | 4.1 | 66.5 | 81.3 | 0.82 | 0.053 7 | 0.002 1 | 0.265 4 | 0.010 3 | 0.035 8 | 0.000 7 | 359.4 | 86.9 | 239.0 | 8.2 | 227.0 | 4.6 | |
13 | 3.0 | 47.1 | 58.5 | 0.80 | 0.052 8 | 0.002 5 | 0.260 8 | 0.012 0 | 0.035 8 | 0.000 8 | 319.3 | 103.2 | 235.3 | 9.6 | 227.0 | 4.8 | |
14 | 4.2 | 65.0 | 86.4 | 0.75 | 0.052 3 | 0.002 2 | 0.257 1 | 0.010 3 | 0.035 7 | 0.000 7 | 297.1 | 91.2 | 232.3 | 8.3 | 226.0 | 4.6 | |
15 | 3.4 | 49.5 | 68.7 | 0.72 | 0.050 3 | 0.002 1 | 0.252 0 | 0.010 4 | 0.036 4 | 0.000 8 | 206.7 | 95.0 | 228.2 | 8.4 | 230.3 | 4.7 | |
16 | 4.0 | 61.3 | 81.1 | 0.76 | 0.049 2 | 0.002 1 | 0.243 5 | 0.009 9 | 0.035 9 | 0.000 7 | 157.1 | 94.6 | 221.3 | 8.1 | 227.3 | 4.6 | |
17 | 3.2 | 50.5 | 64.0 | 0.79 | 0.052 5 | 0.002 3 | 0.262 1 | 0.011 2 | 0.036 2 | 0.000 8 | 305.9 | 96.4 | 236.4 | 9.0 | 229.4 | 4.7 | |
18 | 4.0 | 51.3 | 83.8 | 0.61 | 0.050 1 | 0.002 0 | 0.250 0 | 0.009 6 | 0.036 2 | 0.000 8 | 198.3 | 88.9 | 226.5 | 7.8 | 229.3 | 4.6 | |
19 | 3.0 | 37.6 | 62.3 | 0.60 | 0.052 4 | 0.004 1 | 0.258 3 | 0.019 6 | 0.035 7 | 0.000 9 | 303.6 | 167.3 | 233.3 | 15.8 | 226.3 | 5.6 | |
20 | 4.7 | 72.6 | 94.0 | 0.77 | 0.051 0 | 0.001 9 | 0.251 8 | 0.009 2 | 0.035 8 | 0.000 7 | 240.0 | 84.0 | 228.0 | 7.5 | 226.8 | 4.6 |
样品编号 | 岩性 | SiO2 | TiO2 | Al2O3 | Fe2O3 | FeO | MnO | MgO | CaO | Na2O | K2O | P2O5 | 烧失量 | 总量 | A/CNK |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Gs3022 | 正长花岗岩 | 71.12 | 0.28 | 14.69 | 1.72 | 0.53 | 0.04 | 0.41 | 0.89 | 4.48 | 3.98 | 0.09 | 1.18 | 99.41 | 1.10 |
Gs3010 | 正长花岗岩 | 71.34 | 0.26 | 15.11 | 1.82 | 0.43 | 0.04 | 0.35 | 0.47 | 4.05 | 4.00 | 0.09 | 1.48 | 99.44 | 1.28 |
Gs2064-2 | 正长花岗岩 | 70.78 | 0.29 | 14.42 | 1.37 | 0.95 | 0.04 | 0.60 | 1.16 | 3.84 | 3.91 | 0.08 | 1.76 | 99.20 | 1.14 |
Gs4056 | 正长花岗岩 | 71.76 | 0.30 | 14.33 | 1.71 | 0.71 | 0.05 | 0.60 | 0.67 | 4.25 | 4.06 | 0.09 | 1.12 | 99.65 | 1.14 |
Gs4225 | 正长花岗岩 | 72.24 | 0.31 | 13.14 | 1.67 | 0.72 | 0.07 | 0.43 | 1.86 | 3.86 | 3.93 | 0.09 | 1.42 | 99.74 | 0.94 |
Gs3132 | 石英二长岩 | 64.84 | 0.60 | 15.54 | 3.38 | 0.53 | 0.06 | 1.77 | 2.43 | 4.71 | 3.15 | 0.18 | 2.46 | 99.65 | 1.00 |
Gs8068 | 石英二长岩 | 62.68 | 0.66 | 15.65 | 1.54 | 2.95 | 0.07 | 2.72 | 3.33 | 4.51 | 3.09 | 0.2 | 2.22 | 99.62 | 0.93 |
样品编号 | 岩性 | Na2O/K2O | Mg# | Sc | V | Cr | Ga | Rb | Sr | Y | Nb | Cs | Ba | La | Ce |
Gs3022 | 正长花岗岩 | 1.13 | 29.26 | 4.28 | 28.6 | 4.50 | 16.50 | 111 | 410.0 | 09.6 | 08.9 | 1.87 | 857 | 23.20 | 43.50 |
Gs3010 | 正长花岗岩 | 1.01 | 26.18 | 4.47 | 28.5 | 6.80 | 18.60 | 130 | 239.0 | 11.3 | 10.3 | 5.25 | 729 | 23.10 | 46.30 |
Gs2064-2 | 正长花岗岩 | 0.98 | 36.53 | 4.24 | 25.9 | 6.90 | 17.30 | 132 | 269.0 | 10.7 | 10.5 | 5.39 | 687 | 29.40 | 54.80 |
Gs4056 | 正长花岗岩 | 1.05 | 35.96 | 3.77 | 33.5 | 7.46 | 16.84 | 121 | 426.2 | 13.0 | 09.7 | 1.87 | 916 | 18.75 | 47.08 |
Gs4225 | 正长花岗岩 | 0.98 | 28.86 | 3.47 | 28.3 | 7.36 | 15.59 | 067 | 248.6 | 14.4 | 12.8 | 0.80 | 764 | 14.91 | 38.39 |
Gs3132 | 石英二长岩 | 1.50 | 50.89 | 9.52 | 87.0 | 70.38 | 20.09 | 074 | 827.9 | 14.20 | 07.9 | 2.26 | 908 | 26.54 | 62.67 |
Gs8068 | 石英二长岩 | 1.46 | 56.81 | 9.48 | 96.2 | 79.84 | 18.98 | 059 | 823.0 | 15.3 | 08.2 | 1.68 | 888 | 24.62 | 57.62 |
样品编号 | 岩性 | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Zr | Hf |
Gs3022 | 正长花岗岩 | 4.75 | 17.60 | 3.12 | 0.74 | 2.27 | 0.37 | 1.82 | 0.36 | 0.92 | 0.17 | 0.94 | 0.18 | 122 | 5.7 |
Gs3010 | 正长花岗岩 | 5.04 | 18.70 | 3.21 | 0.70 | 2.39 | 0.35 | 1.98 | 0.40 | 1.18 | 0.19 | 1.25 | 0.21 | 153 | 6.0 |
Gs2064-2 | 正长花岗岩 | 5.62 | 20.50 | 3.47 | 0.76 | 2.50 | 0.37 | 2.04 | 0.38 | 1.04 | 0.17 | 1.08 | 0.17 | 130 | 5.1 |
Gs4056 | 正长花岗岩 | 4.76 | 17.79 | 2.98 | 0.64 | 2.44 | 0.35 | 1.90 | 0.39 | 0.97 | 0.14 | 1.03 | 0.15 | 150 | 5.2 |
Gs4225 | 正长花岗岩 | 4.93 | 18.96 | 3.37 | 0.70 | 2.77 | 0.42 | 2.41 | 0.50 | 1.30 | 0.20 | 1.46 | 0.21 | 168 | 4.1 |
Gs3132 | 石英二长岩 | 7.48 | 29.71 | 5.06 | 1.19 | 3.96 | 0.51 | 2.65 | 0.53 | 1.31 | 0.19 | 1.36 | 0.20 | 179 | 5.2 |
Gs8068 | 石英二长岩 | 6.86 | 27.98 | 4.87 | 1.17 | 3.90 | 0.52 | 2.75 | 0.56 | 1.41 | 0.21 | 1.49 | 0.22 | 184 | 5.5 |
样品编号 | 岩性 | Ta | Th | U | δEu | LREE | HREE | LREE/HREE | REE | Sr/Y | La/Yb | K/Rb | (La/Yb)N | ||
Gs3022 | 正长花岗岩 | 0.87 | 14.19 | 1.24 | 0.81 | 092.9 | 07.03 | 13.21 | 109.49 | 42.93 | 24.68 | 297.66 | 16.63 | ||
Gs3010 | 正长花岗岩 | 0.94 | 15.37 | 1.56 | 0.74 | 097.1 | 07.95 | 12.21 | 116.30 | 21.15 | 18.48 | 255.43 | 12.46 | ||
Gs2064-2 | 正长花岗岩 | 0.90 | 16.32 | 1.65 | 0.75 | 115.0 | 07.75 | 14.84 | 133.00 | 25.14 | 27.22 | 245.90 | 18.34 | ||
Gs4056 | 正长花岗岩 | 1.36 | 14.77 | 2.08 | 0.70 | 092.0 | 07.37 | 12.48 | 112.37 | 32.78 | 18.20 | 278.55 | 12.27 | ||
Gs4225 | 正长花岗岩 | 1.04 | 07.05 | 2.41 | 0.68 | 081.3 | 09.27 | 08.77 | 104.93 | 17.26 | 10.21 | 486.94 | 06.88 | ||
Gs3132 | 石英二长岩 | 0.49 | 11.90 | 3.01 | 0.79 | 133.0 | 10.70 | 12.43 | 157.56 | 58.30 | 19.51 | 353.38 | 13.15 | ||
Gs8068 | 石英二长岩 | 0.59 | 8.12 | 2.55 | 0.80 | 123.0 | 11.10 | 11.08 | 149.48 | 53.79 | 16.52 | 434.78 | 11.14 |
表3 碾子山地区晚三叠世侵入岩主量元素(%)、微量元素和稀土元素(10-6)分析结果
Table 3 Compositions of major elements (%), trace elements and REEs (10-6) of the Late Triassic Nianzishan intrusive rocks
样品编号 | 岩性 | SiO2 | TiO2 | Al2O3 | Fe2O3 | FeO | MnO | MgO | CaO | Na2O | K2O | P2O5 | 烧失量 | 总量 | A/CNK |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Gs3022 | 正长花岗岩 | 71.12 | 0.28 | 14.69 | 1.72 | 0.53 | 0.04 | 0.41 | 0.89 | 4.48 | 3.98 | 0.09 | 1.18 | 99.41 | 1.10 |
Gs3010 | 正长花岗岩 | 71.34 | 0.26 | 15.11 | 1.82 | 0.43 | 0.04 | 0.35 | 0.47 | 4.05 | 4.00 | 0.09 | 1.48 | 99.44 | 1.28 |
Gs2064-2 | 正长花岗岩 | 70.78 | 0.29 | 14.42 | 1.37 | 0.95 | 0.04 | 0.60 | 1.16 | 3.84 | 3.91 | 0.08 | 1.76 | 99.20 | 1.14 |
Gs4056 | 正长花岗岩 | 71.76 | 0.30 | 14.33 | 1.71 | 0.71 | 0.05 | 0.60 | 0.67 | 4.25 | 4.06 | 0.09 | 1.12 | 99.65 | 1.14 |
Gs4225 | 正长花岗岩 | 72.24 | 0.31 | 13.14 | 1.67 | 0.72 | 0.07 | 0.43 | 1.86 | 3.86 | 3.93 | 0.09 | 1.42 | 99.74 | 0.94 |
Gs3132 | 石英二长岩 | 64.84 | 0.60 | 15.54 | 3.38 | 0.53 | 0.06 | 1.77 | 2.43 | 4.71 | 3.15 | 0.18 | 2.46 | 99.65 | 1.00 |
Gs8068 | 石英二长岩 | 62.68 | 0.66 | 15.65 | 1.54 | 2.95 | 0.07 | 2.72 | 3.33 | 4.51 | 3.09 | 0.2 | 2.22 | 99.62 | 0.93 |
样品编号 | 岩性 | Na2O/K2O | Mg# | Sc | V | Cr | Ga | Rb | Sr | Y | Nb | Cs | Ba | La | Ce |
Gs3022 | 正长花岗岩 | 1.13 | 29.26 | 4.28 | 28.6 | 4.50 | 16.50 | 111 | 410.0 | 09.6 | 08.9 | 1.87 | 857 | 23.20 | 43.50 |
Gs3010 | 正长花岗岩 | 1.01 | 26.18 | 4.47 | 28.5 | 6.80 | 18.60 | 130 | 239.0 | 11.3 | 10.3 | 5.25 | 729 | 23.10 | 46.30 |
Gs2064-2 | 正长花岗岩 | 0.98 | 36.53 | 4.24 | 25.9 | 6.90 | 17.30 | 132 | 269.0 | 10.7 | 10.5 | 5.39 | 687 | 29.40 | 54.80 |
Gs4056 | 正长花岗岩 | 1.05 | 35.96 | 3.77 | 33.5 | 7.46 | 16.84 | 121 | 426.2 | 13.0 | 09.7 | 1.87 | 916 | 18.75 | 47.08 |
Gs4225 | 正长花岗岩 | 0.98 | 28.86 | 3.47 | 28.3 | 7.36 | 15.59 | 067 | 248.6 | 14.4 | 12.8 | 0.80 | 764 | 14.91 | 38.39 |
Gs3132 | 石英二长岩 | 1.50 | 50.89 | 9.52 | 87.0 | 70.38 | 20.09 | 074 | 827.9 | 14.20 | 07.9 | 2.26 | 908 | 26.54 | 62.67 |
Gs8068 | 石英二长岩 | 1.46 | 56.81 | 9.48 | 96.2 | 79.84 | 18.98 | 059 | 823.0 | 15.3 | 08.2 | 1.68 | 888 | 24.62 | 57.62 |
样品编号 | 岩性 | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | Lu | Zr | Hf |
Gs3022 | 正长花岗岩 | 4.75 | 17.60 | 3.12 | 0.74 | 2.27 | 0.37 | 1.82 | 0.36 | 0.92 | 0.17 | 0.94 | 0.18 | 122 | 5.7 |
Gs3010 | 正长花岗岩 | 5.04 | 18.70 | 3.21 | 0.70 | 2.39 | 0.35 | 1.98 | 0.40 | 1.18 | 0.19 | 1.25 | 0.21 | 153 | 6.0 |
Gs2064-2 | 正长花岗岩 | 5.62 | 20.50 | 3.47 | 0.76 | 2.50 | 0.37 | 2.04 | 0.38 | 1.04 | 0.17 | 1.08 | 0.17 | 130 | 5.1 |
Gs4056 | 正长花岗岩 | 4.76 | 17.79 | 2.98 | 0.64 | 2.44 | 0.35 | 1.90 | 0.39 | 0.97 | 0.14 | 1.03 | 0.15 | 150 | 5.2 |
Gs4225 | 正长花岗岩 | 4.93 | 18.96 | 3.37 | 0.70 | 2.77 | 0.42 | 2.41 | 0.50 | 1.30 | 0.20 | 1.46 | 0.21 | 168 | 4.1 |
Gs3132 | 石英二长岩 | 7.48 | 29.71 | 5.06 | 1.19 | 3.96 | 0.51 | 2.65 | 0.53 | 1.31 | 0.19 | 1.36 | 0.20 | 179 | 5.2 |
Gs8068 | 石英二长岩 | 6.86 | 27.98 | 4.87 | 1.17 | 3.90 | 0.52 | 2.75 | 0.56 | 1.41 | 0.21 | 1.49 | 0.22 | 184 | 5.5 |
样品编号 | 岩性 | Ta | Th | U | δEu | LREE | HREE | LREE/HREE | REE | Sr/Y | La/Yb | K/Rb | (La/Yb)N | ||
Gs3022 | 正长花岗岩 | 0.87 | 14.19 | 1.24 | 0.81 | 092.9 | 07.03 | 13.21 | 109.49 | 42.93 | 24.68 | 297.66 | 16.63 | ||
Gs3010 | 正长花岗岩 | 0.94 | 15.37 | 1.56 | 0.74 | 097.1 | 07.95 | 12.21 | 116.30 | 21.15 | 18.48 | 255.43 | 12.46 | ||
Gs2064-2 | 正长花岗岩 | 0.90 | 16.32 | 1.65 | 0.75 | 115.0 | 07.75 | 14.84 | 133.00 | 25.14 | 27.22 | 245.90 | 18.34 | ||
Gs4056 | 正长花岗岩 | 1.36 | 14.77 | 2.08 | 0.70 | 092.0 | 07.37 | 12.48 | 112.37 | 32.78 | 18.20 | 278.55 | 12.27 | ||
Gs4225 | 正长花岗岩 | 1.04 | 07.05 | 2.41 | 0.68 | 081.3 | 09.27 | 08.77 | 104.93 | 17.26 | 10.21 | 486.94 | 06.88 | ||
Gs3132 | 石英二长岩 | 0.49 | 11.90 | 3.01 | 0.79 | 133.0 | 10.70 | 12.43 | 157.56 | 58.30 | 19.51 | 353.38 | 13.15 | ||
Gs8068 | 石英二长岩 | 0.59 | 8.12 | 2.55 | 0.80 | 123.0 | 11.10 | 11.08 | 149.48 | 53.79 | 16.52 | 434.78 | 11.14 |
图6 碾子山地区晚三叠世侵入岩TAS图解(a)和SiO2-K2O图解(b)(底图分别据文献[27]和[28]) Ir.Irvine分界线,上方为碱性,下方为亚碱性[29];雅尔根楚侵入岩数据引自文献[10],扎兰屯侵入岩数据引自文献[6,18],成吉思汗镇侵入岩数据据沈阳地质调查中心①(① 沈阳地质调查中心.内蒙古1:5万徐地营子幅(L51E001012)、朱林村幅(L51E001013)、成吉思汗幅(L51E002012)、于家窝堡幅(L51E002013)区域地质矿产调查.沈阳:沈阳地质调查中心,2017.)
Fig.6 TAS (a) and SiO2 vs.K2O (b) diagrams for the Late Triassic Nianzishan intrusive rocks (base map after refs.[27] and [28], respectively)
图7 碾子山地区晚三叠世侵入岩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)(球粒陨石标准化值和原始地幔标准化值据文献[30])
Fig.7 Chondrite-normalized REE patterns (a) and primitive mantle-normalized multi-element patterns (b) for the Late Triassic Nianzishan intrusive rocks(normalized data after ref.[30])
图8 碾子山地区晚三叠世侵入岩Y-Sr/Y(a)及YbN-(La/Yb)N图解(b)(底图分别据文献[32]和[43])
Fig.8 Y vs.Sr/Y (a) and YbN vs. (La/Yb)N (b) diagrams for the Late Triassic Nianzishan intrusive rocks (base map after refs.[32] and [43],respectively)
图10 碾子山地区晚三叠世侵入岩哈克图解(不同埃达克岩不同成因区域划分据文献[46],雅尔根楚埃达克质侵入岩数据引自文献[10],成吉思汗镇埃达克质侵入岩数据据沈阳地质调查中心①)
Fig.10 Harker diagrams for the Late Triassic Nianzishan intrusive rocks
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