Geochronology and Geochemistry of the Uhelchulu Quartz Diorite-Granodiorite in Inner Mongolia of China: Implications for Evolution of the Hegenshan Ocean in the Early-Middle Devonian
Abstract
:1. Introduction
2. Regional Geological Background and Petrological Characteristics
3. Sampling and Analytical Methods
3.1. Sampling
3.2. Analytical Techniques
4. Results
4.1. Mineralogical Characteristics
4.1.1. Uhelchulu Quartz Diorite
4.1.2. Guiqinkundui Granodiorite
4.2. Geochronology
4.3. Whole-Rock Geochemistry
4.3.1. Major Elements
4.3.2. Trace Elements
5. Discussion
5.1. Intrusion Age
5.2. Petrogenesis
5.3. Tectonic Implications
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Spot | Content (×10−6) | Isotope Ratio | Age (Ma) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
U01 | Pb | Th | U | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 207Pb/206Pb | 1σ | 232Th/238U | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 207Pb/206Pb | 1σ |
1 | 9 | 55 | 136 | 0.0643 | 0.0007 | 0.4792 | 0.0136 | 0.0540 | 0.0015 | 0.41 | 402 | 4 | 398 | 11 | 371 | 63 |
2 | 17 | 70 | 272 | 0.0638 | 0.0005 | 0.4936 | 0.0083 | 0.0561 | 0.0009 | 0.26 | 399 | 3 | 407 | 7 | 457 | 36 |
3 | 15 | 40 | 237 | 0.0649 | 0.0007 | 0.5159 | 0.0091 | 0.0559 | 0.0010 | 0.17 | 406 | 4 | 422 | 7 | 447 | 38 |
4 | 18 | 69 | 277 | 0.0647 | 0.0006 | 0.5257 | 0.0095 | 0.0572 | 0.0010 | 0.25 | 404 | 4 | 429 | 8 | 498 | 39 |
5 | 16 | 97 | 198 | 0.0757 | 0.0008 | 0.6044 | 0.0134 | 0.0579 | 0.0013 | 0.50 | 470 | 5 | 480 | 11 | 527 | 48 |
6 | 11 | 87 | 154 | 0.0645 | 0.0006 | 0.5007 | 0.0198 | 0.0563 | 0.0021 | 0.58 | 403 | 4 | 412 | 16 | 463 | 84 |
7 | 14 | 40 | 158 | 0.0757 | 0.0008 | 0.5950 | 0.0119 | 0.1278 | 0.0024 | 0.26 | 470 | 5 | 474 | 9 | 2068 | 33 |
8 | 5 | 31 | 62 | 0.0735 | 0.0013 | 0.8845 | 0.0606 | 0.0867 | 0.0059 | 0.52 | 457 | 8 | 643 | 44 | 1355 | 131 |
9 | 19 | 104 | 281 | 0.0622 | 0.0006 | 0.6960 | 0.0111 | 0.0811 | 0.0013 | 0.38 | 389 | 4 | 536 | 9 | 1225 | 31 |
10 | 18 | 116 | 286 | 0.0610 | 0.0006 | 0.4551 | 0.0087 | 0.0541 | 0.0010 | 0.42 | 382 | 4 | 381 | 7 | 375 | 42 |
11 | 23 | 182 | 351 | 0.0621 | 0.0005 | 0.4628 | 0.0077 | 0.0541 | 0.0009 | 0.53 | 388 | 3 | 386 | 6 | 374 | 37 |
12 | 23 | 135 | 307 | 0.0707 | 0.0006 | 0.5431 | 0.0090 | 0.0557 | 0.0009 | 0.45 | 440 | 3 | 440 | 7 | 442 | 36 |
13 | 12 | 73 | 183 | 0.0622 | 0.0007 | 0.4835 | 0.0153 | 0.0563 | 0.0017 | 0.41 | 389 | 4 | 400 | 13 | 466 | 68 |
Spot | Content (×10−6) | Isotope Ratio | Age (Ma) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
U02 | Pb | Th | U | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 207Pb/206Pb | 1σ | 232Th/238U | 206Pb/238U | 1σ | 207Pb/235U | 1σ | 207Pb/206Pb | 1σ |
1 | 33 | 204 | 516 | 0.0624 | 0.0006 | 0.5424 | 0.0163 | 0.0630 | 0.0018 | 0.41 | 390 | 4 | 440 | 13 | 709 | 62 |
2 | 29 | 55 | 462 | 0.0654 | 0.0009 | 0.5113 | 0.0128 | 0.0567 | 0.0015 | 0.12 | 408 | 5 | 419 | 11 | 481 | 59 |
3 | 15 | 45 | 248 | 0.0610 | 0.0007 | 0.5133 | 0.0236 | 0.0610 | 0.0027 | 0.19 | 382 | 4 | 421 | 19 | 640 | 96 |
4 | 48 | 128 | 778 | 0.0629 | 0.0006 | 0.5356 | 0.0103 | 0.0618 | 0.0011 | 0.17 | 393 | 4 | 436 | 8 | 667 | 38 |
5 | 31 | 186 | 449 | 0.0634 | 0.0006 | 0.5654 | 0.0116 | 0.0647 | 0.0013 | 0.42 | 396 | 4 | 455 | 9 | 764 | 42 |
6 | 28 | 122 | 472 | 0.0599 | 0.0005 | 0.4604 | 0.0112 | 0.0557 | 0.0013 | 0.27 | 375 | 3 | 385 | 9 | 440 | 54 |
7 | 24 | 162 | 329 | 0.0678 | 0.0007 | 0.5284 | 0.0182 | 0.0565 | 0.0019 | 0.51 | 423 | 4 | 431 | 15 | 472 | 76 |
8 | 23 | 117 | 365 | 0.0605 | 0.0006 | 0.5041 | 0.0136 | 0.0604 | 0.0017 | 0.33 | 379 | 4 | 414 | 11 | 618 | 60 |
9 | 19 | 61 | 303 | 0.0600 | 0.0012 | 0.5227 | 0.0403 | 0.0632 | 0.0043 | 0.21 | 376 | 8 | 427 | 33 | 714 | 143 |
10 | 30 | 100 | 481 | 0.0636 | 0.0006 | 0.5001 | 0.0174 | 0.0570 | 0.0019 | 0.21 | 397 | 4 | 412 | 14 | 493 | 75 |
11 | 59 | 834 | 888 | 0.0640 | 0.0008 | 0.5034 | 0.0082 | 0.0571 | 0.0010 | 0.96 | 400 | 5 | 414 | 7 | 495 | 39 |
12 | 49 | 212 | 827 | 0.0593 | 0.0007 | 0.4424 | 0.0080 | 0.0541 | 0.0010 | 0.26 | 371 | 4 | 372 | 7 | 376 | 43 |
13 | 20 | 138 | 321 | 0.0598 | 0.0006 | 0.4556 | 0.0167 | 0.0552 | 0.0020 | 0.44 | 375 | 4 | 381 | 14 | 421 | 81 |
14 | 19 | 118 | 297 | 0.0608 | 0.0006 | 0.4560 | 0.0178 | 0.0544 | 0.0020 | 0.41 | 381 | 4 | 382 | 15 | 386 | 84 |
15 | 32 | 245 | 410 | 0.0692 | 0.0007 | 0.5485 | 0.0176 | 0.0575 | 0.0019 | 0.61 | 432 | 5 | 444 | 14 | 509 | 74 |
16 | 38 | 158 | 614 | 0.0612 | 0.0006 | 0.4543 | 0.0132 | 0.0538 | 0.0015 | 0.26 | 383 | 4 | 380 | 11 | 364 | 63 |
17 | 15 | 87 | 242 | 0.0633 | 0.0009 | 0.4780 | 0.0153 | 0.0547 | 0.0017 | 0.37 | 396 | 6 | 397 | 13 | 401 | 70 |
18 | 42 | 227 | 700 | 0.0597 | 0.0007 | 0.4470 | 0.0080 | 0.0543 | 0.0009 | 0.33 | 374 | 4 | 375 | 7 | 383 | 39 |
19 | 24 | 67 | 387 | 0.0643 | 0.0008 | 0.5039 | 0.0113 | 0.0569 | 0.0013 | 0.18 | 401 | 5 | 414 | 9 | 487 | 49 |
20 | 45 | 246 | 745 | 0.0599 | 0.0007 | 0.4543 | 0.0088 | 0.0550 | 0.0010 | 0.34 | 375 | 4 | 380 | 7 | 411 | 43 |
Sample | Uhelchulu Quartz Diorite | Guiqinkundui Granodiorite | ||||||
---|---|---|---|---|---|---|---|---|
A01 | A02 | A03 | A04 | A05 | A06 | A07 | A08 | |
SiO2 | 60.44 | 55.71 | 55.39 | 60.53 | 73.01 | 70.48 | 72.27 | 71.04 |
TiO2 | 0.73 | 0.99 | 0.96 | 0.81 | 0.64 | 0.67 | 0.61 | 0.69 |
Al2O3 | 14.66 | 15.15 | 15.43 | 14.33 | 11.70 | 12.89 | 13.24 | 12.53 |
Fe2O3 | 1.76 | 2.55 | 2.50 | 2.01 | 0.88 | 0.59 | 0.93 | 0.83 |
FeO | 4.67 | 6.27 | 6.32 | 5.56 | 2.84 | 3.71 | 1.56 | 3.03 |
MnO | 0.13 | 0.17 | 0.18 | 0.16 | 0.06 | 0.07 | 0.04 | 0.05 |
MgO | 3.73 | 5.23 | 5.62 | 4.58 | 1.71 | 2.12 | 1.44 | 2.24 |
CaO | 5.59 | 6.76 | 6.01 | 5.11 | 1.27 | 1.75 | 1.30 | 1.51 |
Na2O | 2.48 | 2.47 | 2.63 | 2.18 | 2.15 | 2.29 | 2.23 | 2.16 |
K2O | 2.39 | 1.72 | 1.87 | 1.77 | 3.94 | 3.10 | 3.75 | 3.47 |
P2O5 | 0.15 | 0.20 | 0.20 | 0.17 | 0.11 | 0.08 | 0.11 | 0.12 |
LOI | 3.08 | 2.60 | 2.75 | 2.68 | 1.55 | 2.16 | 1.50 | 1.68 |
Total | 99.81 | 99.81 | 99.84 | 99.86 | 99.85 | 99.91 | 99.88 | 99.95 |
FeOt | 6.25 | 8.56 | 8.57 | 7.37 | 3.63 | 4.24 | 2.40 | 3.78 |
FeO*/MgO | 1.68 | 1.64 | 1.53 | 1.61 | 2.13 | 2.00 | 1.66 | 1.69 |
Na2O/K2O | 1.04 | 1.44 | 1.41 | 1.23 | 0.55 | 0.74 | 0.59 | 0.62 |
A/CNK | 0.87 | 0.83 | 0.89 | 0.97 | 1.16 | 1.25 | 1.31 | 1.24 |
A/NK | 2.20 | 2.56 | 2.43 | 2.61 | 1.50 | 1.81 | 1.71 | 1.71 |
Ti | 4359 | 5918 | 5744 | 4833 | 3813 | 4029 | 3064 | 3726 |
Y | 28.2 | 43.3 | 36.3 | 31.0 | 34.1 | 45.9 | 34.5 | 37.3 |
V | 170 | 184 | 199 | 162 | 76 | 94 | 72 | 74 |
Cr | 119 | 117 | 154 | 116 | 50 | 63 | 49 | 59 |
Co | 24.8 | 29.9 | 31.5 | 23.5 | 11.0 | 12.5 | 10.8 | 11.9 |
Ga | 20.05 | 19.99 | 19.66 | 16.78 | 16.06 | 19.03 | 16.90 | 17.12 |
Rb | 82.8 | 70.3 | 74.1 | 66.1 | 212.0 | 194.5 | 205.7 | 208.5 |
Sr | 257 | 298 | 321 | 242 | 89 | 134 | 143 | 158 |
Ba | 683 | 340 | 350 | 224 | 481 | 377 | 592 | 483 |
Zr | 163 | 174 | 168 | 165 | 195 | 234 | 187 | 197 |
Nb | 11.3 | 11.2 | 11.1 | 10.4 | 16.3 | 20.0 | 18.6 | 18.5 |
Hf | 10.20 | 11.40 | 9.85 | 9.55 | 7.07 | 8.61 | 6.28 | 7.13 |
Ta | 0.76 | 0.65 | 0.71 | 0.85 | 1.50 | 1.85 | 1.78 | 1.55 |
Pb | 10.3 | 6.3 | 7.7 | 9.4 | 20.0 | 22.0 | 22.7 | 20.3 |
Th | 5.16 | 2.94 | 3.96 | 13.81 | 22.01 | 41.22 | 30.88 | 38.17 |
U | 0.87 | 0.56 | 0.76 | 0.94 | 3.07 | 2.90 | 2.79 | 3.05 |
La | 17.97 | 25.47 | 23.72 | 20.05 | 33.02 | 67.62 | 46.37 | 37.49 |
Ce | 46.51 | 64.36 | 54.91 | 54.14 | 72.66 | 127.08 | 72.3 | 81.4 |
Pr | 6.08 | 8.89 | 7.28 | 6.06 | 8.12 | 15.97 | 6.21 | 10.17 |
Nd | 25.38 | 37.91 | 31.07 | 25.48 | 31.36 | 57.60 | 43.11 | 51.22 |
Sm | 5.53 | 8.49 | 6.97 | 5.87 | 6.65 | 10.86 | 7.85 | 8.91 |
Eu | 1.46 | 2.01 | 1.75 | 1.42 | 1.03 | 1.19 | 0.88 | 1.07 |
Gd | 4.88 | 7.48 | 6.28 | 5.15 | 5.98 | 9.09 | 7.98 | 6.72 |
Tb | 0.89 | 1.37 | 1.16 | 0.96 | 1.11 | 1.51 | 1.32 | 1.36 |
Dy | 5.82 | 8.98 | 7.53 | 6.34 | 7.17 | 9.13 | 5.21 | 7.15 |
Ho | 1.14 | 1.74 | 1.49 | 1.22 | 1.35 | 1.83 | 1.40 | 1.53 |
Er | 3.29 | 5.09 | 4.33 | 3.60 | 3.95 | 5.31 | 3.09 | 4.61 |
Tm | 0.55 | 0.82 | 0.71 | 0.58 | 0.66 | 0.85 | 0.54 | 0.74 |
Yb | 3.30 | 4.89 | 4.15 | 3.42 | 4.00 | 5.10 | 3.09 | 4.16 |
Lu | 0.42 | 0.64 | 0.54 | 0.46 | 0.56 | 0.73 | 0.53 | 0.68 |
δEu | 0.84 | 0.75 | 0.80 | 0.77 | 0.49 | 0.36 | 0.34 | 0.41 |
(La/Yb)N | 3.67 | 3.51 | 3.85 | 3.96 | 5.57 | 8.94 | 10.12 | 6.08 |
ΣLREE | 103 | 147 | 126 | 113 | 153 | 280 | 177 | 190 |
ΣHREE | 20 | 31 | 26 | 22 | 25 | 34 | 23 | 27 |
ΣLREE/ΣHREE | 5.07 | 4.75 | 4.80 | 5.20 | 6.17 | 8.36 | 7.63 | 7.06 |
ΣREE | 123 | 178 | 152 | 135 | 178 | 314 | 2008 | 217 |
TZr (℃) | 748 | 734 | 740 | 762 | 817 | 839 | 808 | 813 |
10,000 × Ga/Al | 1.58 | 1.49 | 1.41 | 1.21 | 1.59 | 1.79 | 1.41 | 1.58 |
Zr +Nb + Ce + Y | 249 | 293 | 270 | 260 | 318 | 427 | 270 | 260 |
Quartz(Q) | 18.63 | 11.23 | 9.56 | 21.03 | 39.53 | 37.02 | 34.50 | 34.32 |
Anorthite(An) | 22.54 | 25.93 | 25.52 | 24.81 | 5.64 | 8.34 | 5.82 | 6.83 |
albite(Ab) | 21.7 | 21.46 | 22.91 | 18.94 | 18.53 | 19.82 | 27.75 | 23.77 |
orthoclase(Or) | 14.6 | 10.44 | 11.37 | 10.74 | 23.69 | 18.73 | 22.50 | 20.87 |
diopside(Di) | 4.14 | 5.86 | 3.14 | 0.1 | ||||
hyersthene(Hy) | 13.95 | 18.87 | 21.42 | 19.4 | 7.93 | 10.87 | 4.82 | 9.58 |
ilmenite(Il) | 1.43 | 1.93 | 1.87 | 1.58 | 1.23 | 1.31 | 1.18 | 1.33 |
magnetite(Mt) | 2.64 | 3.81 | 3.73 | 3 | 1.3 | 0.88 | 1.37 | 1.22 |
apatite(Ap) | 0.37 | 0.48 | 0.47 | 0.41 | 0.27 | 0.19 | 0.26 | 0.28 |
corundum (C) | 1.89 | 2.85 | 1.79 | 1.81 |
Source | Uhelchulu Quartz Diorite | Guiqinkundui Granodiorite | [59] | [23] | [60] | [14] | [58] | [20] | [57] | [56] | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sample | A01 | A02 | A03 | A04 | A05 | A06 | A07 | A08 | PM2 | JG21 | 14NM | PS1-8 | PS1-1 | P37 | SEB1 | ST01 | PT1 | PT2 |
SiO2 | 60.44 | 55.71 | 55.39 | 60.53 | 73.01 | 70.48 | 72.27 | 71.04 | 66.37 | 54.36 | 51.71 | 66.58 | 67.92 | 74.22 | 65.96 | 74.68 | 60.40 | 63.23 |
Th/U | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.41 | 0.55 | 0.75 | 2.07 | 0.30 | 0.30 | 0.42 | 0.48 | 0.35 | 0.33 | 0.33 |
La | 17.97 | 25.47 | 23.72 | 20.05 | 33.02 | 67.62 | 46.37 | 37.49 | 8.70 | 9.04 | 8.40 | 10.89 | 14.57 | 31.50 | 17.03 | 24.49 | 32.00 | 22.20 |
Yb | 3.30 | 4.89 | 4.15 | 3.42 | 4.00 | 5.10 | 3.09 | 4.16 | 0.86 | 1.80 | 1.57 | 0.91 | 1.33 | 5.41 | 0.54 | 7.30 | 2.19 | 1.78 |
(La/Yb)N | 3.67 | 3.51 | 3.85 | 3.96 | 5.57 | 8.94 | 10.12 | 6.08 | 7.26 | 3.60 | 3.84 | 8.58 | 7.86 | 4.18 | 22.62 | 2.41 | 10.48 | 8.95 |
H | 28.52 | 43.13 | 42.60 | 27.68 | 29.00 | 45.23 | 30.84 | 22.62 | 19.11 | 48.74 | ||||||||
Age (Ma) | 396 | 385 | 330 | 325 | 316 | 305 | 275 | 255 | 159 | 132 |
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Cheng, T.; Yang, W.; Teng, C.; Yang, X.; Xiao, D. Geochronology and Geochemistry of the Uhelchulu Quartz Diorite-Granodiorite in Inner Mongolia of China: Implications for Evolution of the Hegenshan Ocean in the Early-Middle Devonian. Minerals 2024, 14, 835. https://doi.org/10.3390/min14080835
Cheng T, Yang W, Teng C, Yang X, Xiao D. Geochronology and Geochemistry of the Uhelchulu Quartz Diorite-Granodiorite in Inner Mongolia of China: Implications for Evolution of the Hegenshan Ocean in the Early-Middle Devonian. Minerals. 2024; 14(8):835. https://doi.org/10.3390/min14080835
Chicago/Turabian StyleCheng, Tianshe, Wenjing Yang, Chao Teng, Xinjie Yang, and Deng Xiao. 2024. "Geochronology and Geochemistry of the Uhelchulu Quartz Diorite-Granodiorite in Inner Mongolia of China: Implications for Evolution of the Hegenshan Ocean in the Early-Middle Devonian" Minerals 14, no. 8: 835. https://doi.org/10.3390/min14080835