现代地质 ›› 2022, Vol. 36 ›› Issue (03): 898-910.DOI: 10.19657/j.geoscience.1000-8527.2021.052
朱德全1(), 唐名鹰2,3,4(
), 丁正江2,5,6, 朱海波3,4, 王炜晓3,4, 张宇7, 何宗围3,4, 吴洪彬3,4
收稿日期:
2021-03-15
修回日期:
2022-04-14
出版日期:
2022-06-10
发布日期:
2022-07-19
通讯作者:
唐名鹰
作者简介:
唐名鹰,男,工程师,1990年出生,地质学专业,主要从事区域地质调查与矿产勘查工作。Email: 353635085@qq.com。基金资助:
ZHU Dequan1(), TANG Mingying2,3,4(
), DING Zhengjiang2,5,6, ZHU Haibo3,4, WANG Weixiao3,4, ZHANG Yu7, HE Zongwei3,4, WU Hongbin3,4
Received:
2021-03-15
Revised:
2022-04-14
Online:
2022-06-10
Published:
2022-07-19
Contact:
TANG Mingying
摘要:
青海乌兰县赛坝沟金矿床位于柴北缘结合带东部,为一中型石英脉型金矿。为进一步确定该矿床形成年龄和成因,对矿区内与成矿关系密切的花岗斑岩脉进行锆石U-Pb年代学和岩石地球化学研究。花岗斑岩LA-ICP-MS锆石U-Pb年龄为(372.4±4.1) Ma,是晚泥盆世岩浆活动的产物。花岗斑岩具高硅、富碱的特征,分异指数(DI)为81.40~84.54,固结指数(SI)为3.56~8.17,表明岩石结晶分异程度较高;微量元素原始地幔标准化图解显示La、Hf、Rb、Th相对富集,而Nb、Ta、P、Ti、Ba、Sr相对亏损;稀土元素球粒陨石标准化配分曲线呈右倾的轻稀土元素富集型,且具轻微Eu元素负异常。综合判别图解分析,认为花岗斑岩属过铝质钙碱性的I型花岗岩。赛坝沟金矿床花岗斑岩形成时间与柴北缘中晚泥盆世陆内伸展时间一致,整体形成于柴北缘中晚泥盆世陆内伸展阶段的后造山构造环境中。脉岩紧邻矿体产出并充填在构造裂隙中,其形成与成矿年龄相接近,因此可将赛坝沟金矿形成时间上限限定在372.4 Ma。后期找矿勘查工作应重点围绕花岗斑岩脉展开。
中图分类号:
朱德全, 唐名鹰, 丁正江, 朱海波, 王炜晓, 张宇, 何宗围, 吴洪彬. 柴北缘赛坝沟金矿床花岗斑岩脉的成因及动力学背景: 来自年代学和地球化学的证据[J]. 现代地质, 2022, 36(03): 898-910.
ZHU Dequan, TANG Mingying, DING Zhengjiang, ZHU Haibo, WANG Weixiao, ZHANG Yu, HE Zongwei, WU Hongbin. Petrogenesis and Geodynamic Setting of Granite Porphyry Dike in Saibagou Gold Deposit,Northern Margin of Qaidam: Evidence from Geochronology and Geochemistry[J]. Geoscience, 2022, 36(03): 898-910.
图2 赛坝沟金矿床地质略图(据文献[32]) 1.第四系;2.赛坝沟蛇绿混杂岩带斜长角闪片岩;3.英云闪长岩;4.石英闪长岩;5.花岗斑岩脉;6.二长闪长玢岩脉;7.闪长岩脉;8.地质界线;9.断层及推测断层;10.逆断层;11.碎裂岩化构造蚀变破碎带;12.金矿体
Fig.2 Geologic map of the Saibagou gold deposit (after reference [32])
图3 赛坝沟金矿床花岗斑岩野外照片(a)及镜下照片(b) SBGWL4.样品SBGWL4采样点位;Kfs.钾长石;Pl.斜长石
Fig.3 Field photo(a) and thin-section micrograph (b) of the granite porphyry from the Saibagou gold deposit
图5 赛坝沟金矿床花岗斑岩样品(SBGWL04)锆石U-Pb谐和图(a)及206Pb/238U年龄结果(b)(c)
Fig.5 Zircon U-Pb concordia diagrams(a) and weighted average 206Pb/238U age (b)(c) of the granite porphyry(sample SBGWL04) from the Saibagou gold deposit
测点 号 | 含量/10-6 | Th/U | 同位素比值 | 年龄/Ma | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pb总量 | 232Th | 238U | 207Pb/206Pb ±1σ | 207Pb/235U ±1σ | 206Pb/238U ±1σ | 208Pb/232Th ±1σ | 207Pb/ 206Pb | 207Pb/ 235U | 206Pb/ 238U | 208Pb/ 232Th | |||
1 | 47 | 353 | 266 | 1.324 | 0.056±0.002 | 0.461±0.018 | 0.059±0.001 | 0.017±0.001 | 472 | 385 | 372.43 | 337 | |
2 | 65 | 451 | 378 | 1.193 | 0.057±0.002 | 0.468±0.018 | 0.059±0.002 | 0.018±0.001 | 502 | 390 | 372.38 | 356 | |
3 | 26 | 171 | 153 | 1.118 | 0.050±0.002 | 0.411±0.014 | 0.060±0.001 | 0.018±0.001 | 209 | 350 | 372.66 | 362 | |
4 | 30 | 111 | 354 | 0.314 | 0.058±0.003 | 0.484±0.040 | 0.059±0.002 | 0.018±0.003 | 520 | 401 | 372.18 | 365 | |
5 | 47 | 359 | 274 | 1.311 | 0.054±0.002 | 0.449±0.021 | 0.059±0.001 | 0.018±0.001 | 372 | 377 | 372.12 | 351 | |
6 | 451 | 4 852 | 4 505 | 1.077 | 0.054±0.001 | 0.448±0.014 | 0.059±0.002 | 0.013±0.001 | 383 | 376 | 372.34 | 259 | |
7 | 96 | 749 | 531 | 1.409 | 0.055±0.001 | 0.456±0.014 | 0.059±0.001 | 0.014±0.001 | 432 | 382 | 372.34 | 286 | |
8 | 70 | 392 | 626 | 0.625 | 0.052±0.001 | 0.427±0.013 | 0.059±0.001 | 0.015±0.001 | 272 | 361 | 372.47 | 302 | |
9 | 222 | 1 987 | 771 | 2.578 | 0.054±0.001 | 0.443±0.014 | 0.060±0.001 | 0.016±0.001 | 365 | 372 | 373.14 | 315 | |
10 | 73 | 601 | 388 | 1.549 | 0.053±0.002 | 0.433±0.015 | 0.060±0.002 | 0.016±0.001 | 317 | 365 | 372.37 | 311 | |
11 | 18 | 108 | 138 | 0.782 | 0.053±0.003 | 0.427±0.025 | 0.059±0.002 | 0.017±0.001 | 328 | 361 | 372.35 | 347 | |
12 | 136 | 233 | 2 227 | 0.105 | 0.052±0.001 | 0.429±0.012 | 0.059±0.001 | 0.019±0.001 | 295 | 363 | 372.46 | 377 | |
13 | 29 | 208 | 214 | 0.971 | 0.049±0.002 | 0.400±0.015 | 0.059±0.001 | 0.013±0.001 | 128 | 341 | 372.37 | 260 | |
14 | 56 | 449 | 275 | 1.633 | 0.052±0.002 | 0.426±0.015 | 0.059±0.001 | 0.015±0.001 | 280 | 361 | 372.74 | 300 | |
15 | 51 | 412 | 259 | 1.594 | 0.054±0.002 | 0.443±0.019 | 0.059±0.002 | 0.016±0.001 | 372 | 372 | 372.85 | 318 | |
16 | 15 | 103 | 96 | 1.073 | 0.050±0.003 | 0.409±0.024 | 0.059±0.002 | 0.015±0.001 | 217 | 348 | 371.35 | 303 | |
17 | 42 | 330 | 258 | 1.280 | 0.053±0.002 | 0.436±0.013 | 0.059±0.001 | 0.014±0.001 | 339 | 367 | 372.50 | 282 | |
18 | 19 | 126 | 137 | 0.919 | 0.055±0.003 | 0.448±0.024 | 0.059±0.001 | 0.015±0.001 | 398 | 376 | 372.38 | 307 | |
19 | 28 | 181 | 178 | 1.015 | 0.054±0.002 | 0.443±0.019 | 0.059±0.001 | 0.020±0.001 | 376 | 373 | 372.55 | 394 | |
20 | 55 | 394 | 352 | 1.119 | 0.051±0.002 | 0.420±0.012 | 0.059±0.001 | 0.017±0.001 | 257 | 356 | 372.46 | 333 | |
21 | 30 | 207 | 230 | 0.901 | 0.051±0.002 | 0.399±0.016 | 0.057±0.001 | 0.014±0.001 | 250 | 341 | 355.38 | 272 | |
22 | 25 | 159 | 162 | 0.981 | 0.056±0.003 | 0.438±0.025 | 0.057±0.001 | 0.020±0.002 | 435 | 369 | 355.72 | 394 | |
23 | 41 | 286 | 256 | 1.117 | 0.053±0.002 | 0.411±0.016 | 0.057±0.001 | 0.016±0.002 | 320 | 349 | 355.91 | 312 | |
24 | 61 | 429 | 388 | 1.104 | 0.054±0.002 | 0.423±0.014 | 0.057±0.001 | 0.015±0.002 | 361 | 358 | 355.51 | 302 | |
25 | 39 | 239 | 299 | 0.800 | 0.053±0.002 | 0.481±0.017 | 0.066±0.002 | 0.015±0.001 | 328 | 399 | 409.85 | 310 | |
26 | 118 | 620 | 723 | 0.857 | 0.053±0.001 | 0.546±0.029 | 0.076±0.005 | 0.021±0.001 | 339 | 443 | 471.77 | 418 | |
27 | 87 | 389 | 600 | 0.648 | 0.050±0.001 | 0.534±0.019 | 0.077±0.002 | 0.021±0.001 | 198 | 434 | 476.50 | 424 |
表1 赛坝沟金矿床花岗斑岩(样品SBGWL4)LA-ICP-MS锆石U-Pb定年结果
Table 1 LA-ICP-MS zircon U-Pb dating results of the granite porphyry (sample SBGWL4) from the Saibagou gold deposit
测点 号 | 含量/10-6 | Th/U | 同位素比值 | 年龄/Ma | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pb总量 | 232Th | 238U | 207Pb/206Pb ±1σ | 207Pb/235U ±1σ | 206Pb/238U ±1σ | 208Pb/232Th ±1σ | 207Pb/ 206Pb | 207Pb/ 235U | 206Pb/ 238U | 208Pb/ 232Th | |||
1 | 47 | 353 | 266 | 1.324 | 0.056±0.002 | 0.461±0.018 | 0.059±0.001 | 0.017±0.001 | 472 | 385 | 372.43 | 337 | |
2 | 65 | 451 | 378 | 1.193 | 0.057±0.002 | 0.468±0.018 | 0.059±0.002 | 0.018±0.001 | 502 | 390 | 372.38 | 356 | |
3 | 26 | 171 | 153 | 1.118 | 0.050±0.002 | 0.411±0.014 | 0.060±0.001 | 0.018±0.001 | 209 | 350 | 372.66 | 362 | |
4 | 30 | 111 | 354 | 0.314 | 0.058±0.003 | 0.484±0.040 | 0.059±0.002 | 0.018±0.003 | 520 | 401 | 372.18 | 365 | |
5 | 47 | 359 | 274 | 1.311 | 0.054±0.002 | 0.449±0.021 | 0.059±0.001 | 0.018±0.001 | 372 | 377 | 372.12 | 351 | |
6 | 451 | 4 852 | 4 505 | 1.077 | 0.054±0.001 | 0.448±0.014 | 0.059±0.002 | 0.013±0.001 | 383 | 376 | 372.34 | 259 | |
7 | 96 | 749 | 531 | 1.409 | 0.055±0.001 | 0.456±0.014 | 0.059±0.001 | 0.014±0.001 | 432 | 382 | 372.34 | 286 | |
8 | 70 | 392 | 626 | 0.625 | 0.052±0.001 | 0.427±0.013 | 0.059±0.001 | 0.015±0.001 | 272 | 361 | 372.47 | 302 | |
9 | 222 | 1 987 | 771 | 2.578 | 0.054±0.001 | 0.443±0.014 | 0.060±0.001 | 0.016±0.001 | 365 | 372 | 373.14 | 315 | |
10 | 73 | 601 | 388 | 1.549 | 0.053±0.002 | 0.433±0.015 | 0.060±0.002 | 0.016±0.001 | 317 | 365 | 372.37 | 311 | |
11 | 18 | 108 | 138 | 0.782 | 0.053±0.003 | 0.427±0.025 | 0.059±0.002 | 0.017±0.001 | 328 | 361 | 372.35 | 347 | |
12 | 136 | 233 | 2 227 | 0.105 | 0.052±0.001 | 0.429±0.012 | 0.059±0.001 | 0.019±0.001 | 295 | 363 | 372.46 | 377 | |
13 | 29 | 208 | 214 | 0.971 | 0.049±0.002 | 0.400±0.015 | 0.059±0.001 | 0.013±0.001 | 128 | 341 | 372.37 | 260 | |
14 | 56 | 449 | 275 | 1.633 | 0.052±0.002 | 0.426±0.015 | 0.059±0.001 | 0.015±0.001 | 280 | 361 | 372.74 | 300 | |
15 | 51 | 412 | 259 | 1.594 | 0.054±0.002 | 0.443±0.019 | 0.059±0.002 | 0.016±0.001 | 372 | 372 | 372.85 | 318 | |
16 | 15 | 103 | 96 | 1.073 | 0.050±0.003 | 0.409±0.024 | 0.059±0.002 | 0.015±0.001 | 217 | 348 | 371.35 | 303 | |
17 | 42 | 330 | 258 | 1.280 | 0.053±0.002 | 0.436±0.013 | 0.059±0.001 | 0.014±0.001 | 339 | 367 | 372.50 | 282 | |
18 | 19 | 126 | 137 | 0.919 | 0.055±0.003 | 0.448±0.024 | 0.059±0.001 | 0.015±0.001 | 398 | 376 | 372.38 | 307 | |
19 | 28 | 181 | 178 | 1.015 | 0.054±0.002 | 0.443±0.019 | 0.059±0.001 | 0.020±0.001 | 376 | 373 | 372.55 | 394 | |
20 | 55 | 394 | 352 | 1.119 | 0.051±0.002 | 0.420±0.012 | 0.059±0.001 | 0.017±0.001 | 257 | 356 | 372.46 | 333 | |
21 | 30 | 207 | 230 | 0.901 | 0.051±0.002 | 0.399±0.016 | 0.057±0.001 | 0.014±0.001 | 250 | 341 | 355.38 | 272 | |
22 | 25 | 159 | 162 | 0.981 | 0.056±0.003 | 0.438±0.025 | 0.057±0.001 | 0.020±0.002 | 435 | 369 | 355.72 | 394 | |
23 | 41 | 286 | 256 | 1.117 | 0.053±0.002 | 0.411±0.016 | 0.057±0.001 | 0.016±0.002 | 320 | 349 | 355.91 | 312 | |
24 | 61 | 429 | 388 | 1.104 | 0.054±0.002 | 0.423±0.014 | 0.057±0.001 | 0.015±0.002 | 361 | 358 | 355.51 | 302 | |
25 | 39 | 239 | 299 | 0.800 | 0.053±0.002 | 0.481±0.017 | 0.066±0.002 | 0.015±0.001 | 328 | 399 | 409.85 | 310 | |
26 | 118 | 620 | 723 | 0.857 | 0.053±0.001 | 0.546±0.029 | 0.076±0.005 | 0.021±0.001 | 339 | 443 | 471.77 | 418 | |
27 | 87 | 389 | 600 | 0.648 | 0.050±0.001 | 0.534±0.019 | 0.077±0.002 | 0.021±0.001 | 198 | 434 | 476.50 | 424 |
序号 | 样品号 | SiO2 | Al2O3 | Fe2O3 | FeO | MgO | CaO | K2O | H2O+ | TiO2 | P2O5 | MnO | CO2 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | GSX01 | 71.83 | 13.64 | 2.49 | 1.50 | 0.81 | 1.72 | 1.64 | 0.32 | 0.17 | 0.05 | 0.05 | 0.24 |
2 | GSX04 | 72.92 | 13.25 | 2.60 | 0.85 | 0.35 | 1.39 | 1.52 | 0.34 | 0.14 | 0.05 | 0.03 | 0.14 |
3 | 19021 | 74.84 | 13.12 | 2.21 | 1.32 | 0.32 | 1.67 | 1.59 | 0.48 | 0.15 | 0.04 | 0.06 | 0.12 |
4 | 19022 | 73.23 | 13.70 | 2.45 | 0.98 | 0.57 | 1.18 | 1.48 | 0.21 | 0.17 | 0.05 | 0.04 | 0.16 |
序号 | 样品号 | Na2O | LOI (烧失量) | 合计 | Qtz (石英) | An (钙长石) | Ab (钠长石) | Or (钾长石) | σ (里特曼指数) | DI (分异指数) | Na2O/ K2O | SI (固结指数) | AR (碱度率) |
1 | GSX01 | 3.47 | 1.66 | 99.58 | 41.38 | 6.85 | 30.09 | 9.93 | 0.91 | 81.40 | 2.12 | 8.17 | 2.65 |
2 | GSX04 | 3.74 | 2.42 | 99.73 | 42.53 | 5.85 | 32.59 | 9.25 | 0.92 | 84.38 | 2.46 | 3.86 | 3.09 |
3 | 19021 | 3.56 | 2.32 | 101.81 | 44.01 | 7.32 | 30.34 | 9.46 | 0.83 | 83.82 | 2.24 | 3.56 | 2.86 |
4 | 19022 | 3.67 | 2.94 | 100.83 | 43.77 | 4.63 | 31.81 | 8.96 | 0.88 | 84.54 | 2.48 | 6.23 | 2.95 |
序号 | 样品号 | A/CNK (铝饱和指数) | Sc | Cr | Zn | U | Rb | Zr | Nb | Hf | Ta | Th | Ba |
1 | GSX01 | 1.30 | 7.07 | 11.37 | 80.93 | 1.13 | 37.24 | 96.58 | 2.72 | 4.10 | 0.43 | 6.22 | 220.67 |
2 | GSX04 | 1.30 | 2.13 | 7.88 | 44.45 | 1.20 | 37.98 | 100.35 | 1.97 | 3.70 | 0.21 | 5.80 | 195.55 |
3 | 19021 | 1.20 | 6.54 | 10.88 | 32.65 | 1.17 | 37.34 | 98.54 | 2.05 | 3.80 | 0.34 | 6.87 | 200.43 |
4 | 19022 | 1.40 | 3.68 | 9.65 | 19.54 | 1.23 | 37.11 | 102.76 | 2.54 | 4.00 | 0.29 | 6.12 | 211.65 |
序号 | 样品号 | Sr | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er |
1 | GSX01 | 181.83 | 17.20 | 28.50 | 3.74 | 13.97 | 2.60 | 0.75 | 2.22 | 0.34 | 1.85 | 0.33 | 0.96 |
2 | GSX04 | 156.11 | 17.32 | 30.53 | 3.64 | 12.75 | 2.34 | 0.66 | 1.83 | 0.26 | 1.18 | 0.19 | 0.53 |
3 | 19021 | 165.98 | 17.43 | 29.08 | 3.87 | 12.87 | 2.45 | 0.71 | 1.94 | 0.32 | 1.65 | 0.43 | 0.88 |
4 | 19022 | 179.22 | 17.39 | 31.54 | 3.63 | 13.54 | 2.58 | 0.64 | 2.43 | 0.28 | 1.19 | 0.32 | 0.79 |
序号 | 样品号 | Tm | Yb | Lu | Y | REE | LREE | HREE | LREE/HREE | (La/Yb)N | δEu | δCe | |
1 | GSX01 | 0.14 | 0.92 | 0.15 | 8.99 | 73.67 | 66.76 | 6.91 | 9.66 | 12.60 | 0.93 | 0.82 | |
2 | GSX04 | 0.07 | 0.42 | 0.08 | 5.46 | 71.80 | 67.24 | 4.56 | 14.75 | 27.80 | 0.94 | 0.88 | |
3 | 19021 | 0.13 | 0.76 | 0.11 | 6.86 | 72.63 | 66.41 | 6.22 | 10.68 | 15.46 | 0.96 | 0.82 | |
4 | 19022 | 0.10 | 0.64 | 0.14 | 7.24 | 75.21 | 69.32 | 5.89 | 11.77 | 18.32 | 0.77 | 0.91 |
表2 赛坝沟金矿床花岗斑岩样品主量(%)、 微量(10-6)和稀土元素(10-6)分析结果
Table 2 Compositions of major elements (%), trace elements (10-6) and REEs (10-6) of the granite porphyry samples from the Saibagou gold deposit
序号 | 样品号 | SiO2 | Al2O3 | Fe2O3 | FeO | MgO | CaO | K2O | H2O+ | TiO2 | P2O5 | MnO | CO2 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | GSX01 | 71.83 | 13.64 | 2.49 | 1.50 | 0.81 | 1.72 | 1.64 | 0.32 | 0.17 | 0.05 | 0.05 | 0.24 |
2 | GSX04 | 72.92 | 13.25 | 2.60 | 0.85 | 0.35 | 1.39 | 1.52 | 0.34 | 0.14 | 0.05 | 0.03 | 0.14 |
3 | 19021 | 74.84 | 13.12 | 2.21 | 1.32 | 0.32 | 1.67 | 1.59 | 0.48 | 0.15 | 0.04 | 0.06 | 0.12 |
4 | 19022 | 73.23 | 13.70 | 2.45 | 0.98 | 0.57 | 1.18 | 1.48 | 0.21 | 0.17 | 0.05 | 0.04 | 0.16 |
序号 | 样品号 | Na2O | LOI (烧失量) | 合计 | Qtz (石英) | An (钙长石) | Ab (钠长石) | Or (钾长石) | σ (里特曼指数) | DI (分异指数) | Na2O/ K2O | SI (固结指数) | AR (碱度率) |
1 | GSX01 | 3.47 | 1.66 | 99.58 | 41.38 | 6.85 | 30.09 | 9.93 | 0.91 | 81.40 | 2.12 | 8.17 | 2.65 |
2 | GSX04 | 3.74 | 2.42 | 99.73 | 42.53 | 5.85 | 32.59 | 9.25 | 0.92 | 84.38 | 2.46 | 3.86 | 3.09 |
3 | 19021 | 3.56 | 2.32 | 101.81 | 44.01 | 7.32 | 30.34 | 9.46 | 0.83 | 83.82 | 2.24 | 3.56 | 2.86 |
4 | 19022 | 3.67 | 2.94 | 100.83 | 43.77 | 4.63 | 31.81 | 8.96 | 0.88 | 84.54 | 2.48 | 6.23 | 2.95 |
序号 | 样品号 | A/CNK (铝饱和指数) | Sc | Cr | Zn | U | Rb | Zr | Nb | Hf | Ta | Th | Ba |
1 | GSX01 | 1.30 | 7.07 | 11.37 | 80.93 | 1.13 | 37.24 | 96.58 | 2.72 | 4.10 | 0.43 | 6.22 | 220.67 |
2 | GSX04 | 1.30 | 2.13 | 7.88 | 44.45 | 1.20 | 37.98 | 100.35 | 1.97 | 3.70 | 0.21 | 5.80 | 195.55 |
3 | 19021 | 1.20 | 6.54 | 10.88 | 32.65 | 1.17 | 37.34 | 98.54 | 2.05 | 3.80 | 0.34 | 6.87 | 200.43 |
4 | 19022 | 1.40 | 3.68 | 9.65 | 19.54 | 1.23 | 37.11 | 102.76 | 2.54 | 4.00 | 0.29 | 6.12 | 211.65 |
序号 | 样品号 | Sr | La | Ce | Pr | Nd | Sm | Eu | Gd | Tb | Dy | Ho | Er |
1 | GSX01 | 181.83 | 17.20 | 28.50 | 3.74 | 13.97 | 2.60 | 0.75 | 2.22 | 0.34 | 1.85 | 0.33 | 0.96 |
2 | GSX04 | 156.11 | 17.32 | 30.53 | 3.64 | 12.75 | 2.34 | 0.66 | 1.83 | 0.26 | 1.18 | 0.19 | 0.53 |
3 | 19021 | 165.98 | 17.43 | 29.08 | 3.87 | 12.87 | 2.45 | 0.71 | 1.94 | 0.32 | 1.65 | 0.43 | 0.88 |
4 | 19022 | 179.22 | 17.39 | 31.54 | 3.63 | 13.54 | 2.58 | 0.64 | 2.43 | 0.28 | 1.19 | 0.32 | 0.79 |
序号 | 样品号 | Tm | Yb | Lu | Y | REE | LREE | HREE | LREE/HREE | (La/Yb)N | δEu | δCe | |
1 | GSX01 | 0.14 | 0.92 | 0.15 | 8.99 | 73.67 | 66.76 | 6.91 | 9.66 | 12.60 | 0.93 | 0.82 | |
2 | GSX04 | 0.07 | 0.42 | 0.08 | 5.46 | 71.80 | 67.24 | 4.56 | 14.75 | 27.80 | 0.94 | 0.88 | |
3 | 19021 | 0.13 | 0.76 | 0.11 | 6.86 | 72.63 | 66.41 | 6.22 | 10.68 | 15.46 | 0.96 | 0.82 | |
4 | 19022 | 0.10 | 0.64 | 0.14 | 7.24 | 75.21 | 69.32 | 5.89 | 11.77 | 18.32 | 0.77 | 0.91 |
图6 赛坝沟金矿床花岗斑岩主量元素相关图解 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.6 Correlation diagrams of major elements of the granite porphyry samples from the Saibagou gold deposit
图8 赛坝沟金矿床花岗斑岩微量元素原始地幔标准化蛛网图(a)和稀土元素球粒陨石标准化配分模式(b)
Fig.8 Primitive mantle-normalized trace element(a) and chondrite-normalized REE(b) plots of the granite porphyry samples from the Saibagou gold deposit
图9 赛坝沟金矿床花岗斑岩分类判别图解(底图据文献[34]) (a)Ce与10000Ga/Al判别图;(b)Nb与10000Ga/Al判别图;(c)(Zr+Nb+Ce+Y)与(TFeO+MgO)判别图;(d)TiO2与Zr判别图
Fig.9 Discrimination diagrams of the granite porphyry samples from the Saibagou gold deposit (base map after reference[34])
图10 赛坝沟金矿床花岗斑岩SiO2-Al2O3(a)和SiO2-(Fe2O3+FeO)/(Fe2O3+FeO+MgO) (b)判别图解(底图据文献[35])
Fig.10 SiO2-Al2O3(a) and SiO2-(Fe2O3+FeO)/(Fe2O3+FeO+MgO) (b)diagrams of the granite porphyry from the Saibagou gold deposit (base map after reference[35])
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