Geochronological and Geochemical Study of Zircon from Tourmaline-Muscovite Granites of the Archaean Kolmozero–Voronya Greenstone Belt: Insights into Sources of the Rare-Metal Pegmatites
Abstract
:1. Introduction
2. Geological Setting of the Kolmozero–Voronya Greenstone Belt
3. Geological Setting and Mineral Composition of the Tourmaline-Muscovite Granites (TMG)
4. Analytical Methods
5. Results
5.1. Major and Trace Element Composition of Tourmaline-Muscovite Granites (TMG)
5.2. SIMS (REE) Study of Zircons
5.3. U-Pb (SHRIMP RG) Dating of Zircons
6. Discussion
7. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Element | KV-45 | KV-45/1 | KV-110/1 | KV-110/2 | KV-110/3 | Tourmaline-Muscovite Granite (n = 18), [13] |
---|---|---|---|---|---|---|
SiO2 | 74.52 | 73.14 | 73.6 | 74.21 | 75.35 | 73.83 |
TiO2 | 0.08 | 0.06 | 0.04 | 0.02 | 0.02 | 0.1 |
Al2O3 | 14.48 | 14.78 | 14.92 | 13.78 | 13.9 | 14.22 |
Fe2O3 | 0.62 | 0.29 | 0.05 | 0.09 | 0.13 | 0.56 |
FeO | 0.23 | 1.12 | 1.59 | 1.56 | 1.39 | 1 |
MnO | 0.02 | 0.07 | 0.075 | 0.18 | 0.1 | 0.058 |
MgO | 0.14 | 0.13 | 0.12 | 0.1 | 0.1 | 0.27 |
CaO | 0.53 | 0.62 | 0.48 | 0.29 | 0.34 | 0.8 |
Na2O | 3.58 | 3.46 | 4.11 | 3.55 | 4.51 | 3.89 |
K2O | 3.86 | 4.98 | 3.46 | 4.51 | 3.9 | 4.08 |
H2O | 0.48 | 0.07 | 0.14 | 0.15 | 0.1 | 0.61 |
P2O5 | 0.14 | 0.33 | 0.08 | 0.11 | 0.82 | 0.17 |
S | 0.02 | 0.04 | 0.05 | 0.05 | 0.03 | n.a. |
LOI | 1.16 | 0.61 | 0.74 | 0.54 | 0.36 | n.a. |
Total | 99.86 | 99.7 | 99.46 | 99.14 | 101.05 | 99.59 |
Na2O + K2O | 7.44 | 8.44 | 7.57 | 8.06 | 8.41 | 7.97 |
(Na + K)/Al | 0.696 | 0.751 | 0.705 | 0.779 | 0.838 | 0.761 |
Li | 107.5 | 103.5 | 82.2 | 76.2 | 104.6 | n.a. |
Be | 3.0 | 3.5 | 4.2 | 4.3 | 4.0 | n.a. |
Sc | 10.3 | 5.8 | 22.2 | 18.4 | 15.1 | n.a. |
Ti | 407.8 | 199.7 | 270.2 | 201.0 | 162.6 | n.a. |
V | 0.78 | 0.55 | 2.16 | 1.73 | 1.75 | n.a. |
Cr | 261.5 | 131.8 | 683.9 | 601.9 | 580.8 | n.a. |
Mn | 261 | 889 | 988 | 2685 | 1449 | n.a. |
Co | 0.68 | 1.67 | 2.30 | 2.37 | 2.28 | n.a. |
Ni | 2.06 | 31.0 | 33.0 | 30.4 | 38.3 | n.a. |
Cu | 4.17 | 8.46 | 15.43 | 14.74 | 14.10 | n.a. |
Zn | 27.5 | 25.4 | 26.2 | 34.5 | 30.2 | n.a. |
Ga | 30.7 | 31.6 | 44.5 | 42.1 | 36.3 | n.a. |
Ge | 2.16 | 3.66 | 2.86 | 3.53 | 3.28 | n.a. |
As | 1.83 | 1.44 | 3.00 | 5.63 | 5.47 | n.a. |
Se | 0.35 | 0.41 | 0.49 | 0.63 | 0.44 | n.a. |
Rb | 264.4 | 352.2 | 436.9 | 716.2 | 585.2 | n.a. |
Sr | 15.7 | 16.2 | 10.9 | 6.7 | 6.5 | n.a. |
Y | 7.5 | 4.6 | 22.2 | 26.7 | 12.6 | n.a. |
Zr | 19.6 | 15.2 | 19.2 | 25.3 | 20.2 | n.a. |
Nb | 14.1 | 16.4 | 35.3 | 29.0 | 14.1 | n.a. |
Mo | 0.08 | 1.09 | 2.58 | 2.11 | 2.43 | n.a. |
Ag | 0.61 | 0.49 | 0.97 | 0.92 | 0.48 | n.a. |
Cd | 0.08 | 0.13 | 0.10 | 0.13 | 0.08 | n.a. |
Sn | 6.22 | 5.04 | 17.26 | 10.64 | 4.38 | n.a. |
Sb | 0.03 | 0.06 | 0.16 | 0.16 | 0.17 | n.a. |
Te | n.a | n.a | n.a | n.a | n.a | n.a. |
Cs | 10.4 | 8.6 | 10.1 | 22.7 | 17.9 | n.a. |
Ba | 15.8 | 14.4 | 16.2 | 17.7 | 12.0 | n.a. |
La | 2.8 | 0.77 | 6.42 | 6.88 | 3.32 | n.a. |
Ce | 6.3 | 1.9 | 14.9 | 15.0 | 8.2 | n.a. |
Pr | 0.74 | 0.23 | 1.86 | 1.83 | 0.99 | n.a. |
Nd | 2.53 | 0.80 | 6.44 | 6.59 | 3.47 | n.a. |
Sm | 0.95 | 0.46 | 2.75 | 2.88 | 1.44 | n.a. |
Eu | 0.053 | 0.049 | 0.042 | 0.033 | 0.019 | n.a. |
Gd | 1.12 | 0.59 | 2.97 | 3.33 | 1.53 | n.a. |
Tb | 0.21 | 0.13 | 0.54 | 0.59 | 0.27 | n.a. |
Dy | 1.16 | 0.69 | 2.92 | 3.35 | 1.60 | n.a. |
Ho | 0.18 | 0.10 | 0.44 | 0.54 | 0.26 | n.a. |
Er | 0.46 | 0.29 | 1.28 | 1.57 | 0.77 | n.a. |
Tm | 0.07 | 0.05 | 0.20 | 0.26 | 0.13 | n.a. |
Yb | 0.44 | 0.37 | 1.50 | 1.99 | 1.04 | n.a. |
Lu | 0.06 | 0.05 | 0.18 | 0.28 | 0.14 | n.a. |
Hf | 0.74 | 0.81 | 0.95 | 1.40 | 1.27 | n.a. |
Ta | 1.66 | 3.04 | 3.51 | 2.90 | 2.09 | n.a. |
W | 1.79 | 1.65 | 3.89 | 2.42 | 1.33 | n.a |
Tl | 0.82 | 1.17 | 1.11 | 2.01 | 1.77 | n.a. |
Pb | 10.3 | 18.1 | 13.1 | 13.2 | 11.5 | n.a. |
Bi | 5.24 | 2.29 | 0.35 | 0.88 | 0.90 | n.a. |
Th | 2.03 | 0.43 | 11.8 | 13.9 | 5.6 | n.a. |
U | 5.87 | 3.90 | 9.01 | 25.9 | 11.4 | n.a. |
Spot | Grain 1 | Grain 2 | Grain 3 | Grain 4 | Grain 5 | Grain 6 | ||||
---|---|---|---|---|---|---|---|---|---|---|
Elements | 1.1 | 1.2 | 2.1 | 2.2 | 3.1 | 4.1 | 4.2 | 5.1 | 5.2 | 6.1 |
Ti | 20.8 | 188.7 | 439.9 | 41.9 | 20.8 | 2.4 | 111.5 | 28.5 | 13.3 | 4.7 |
Fe | 661 | 2266 | 3666 | 497 | 154 | 36 | 5117 | 116 | 204 | 433 |
Y | 1311 | 5057 | 2192 | 582 | 384 | 452 | 3243 | 622 | 438 | 605 |
La | 34.75 | 108.92 | 61.36 | 39.53 | 7.02 | 0.02 | 121.01 | 5.90 | 3.16 | 3.71 |
Ce | 143 | 751 | 306 | 134 | 48 | 13 | 569 | 35 | 19 | 24 |
Nd | 37.7 | 407.7 | 142.3 | 57.4 | 18.1 | 0.4 | 333.7 | 11.5 | 8.9 | 4.0 |
Sm | 52.9 | 659.5 | 190.5 | 56.0 | 31.4 | 0.9 | 273 | 18.1 | 11.4 | 4.3 |
Eu | 6.69 | 125.34 | 8.92 | 5.72 | 1.93 | 0.27 | 20.74 | 1.18 | 0.48 | 0.27 |
Gd | 161 | 2194 | 571 | 139 | 91 | 8 | 529 | 80 | 52 | 18 |
Dy | 247 | 1265 | 580 | 139 | 100 | 40 | 615 | 136 | 91 | 67 |
Er | 204 | 506 | 246 | 68 | 47 | 86 | 358 | 79 | 49 | 113 |
Yb | 448 | 807 | 734 | 102 | 110 | 191 | 426 | 97 | 52 | 211 |
Hf | 11,798 | 15,586 | 24,748 | 10,207 | 12,776 | 10,386 | 14,073 | 9667 | 12,135 | 12,371 |
Th/U | 0.31 | 0.08 | 0.03 | 0.03 | 0.03 | 0.44 | 0.07 | 0.14 | 0.08 | 0.09 |
Eu/Eu* | 0.22 | 0.32 | 0.08 | 0.20 | 0.11 | 0.30 | 1.17 | 0.09 | 0.06 | 0.09 |
Ce/Ce* | 2.11 | 1.90 | 1.75 | 1.50 | 2.29 | 82.55 | 1.51 | 2.25 | 1.93 | 3.41 |
ΣREE | 1336.60 | 6823.97 | 2840.76 | 740.26 | 454.04 | 340.55 | 3246.13 | 463.16 | 287.48 | 445.35 |
ΣLREE | 275.45 | 2052.49 | 708.78 | 292.69 | 106.64 | 15.08 | 1317.74 | 71.49 | 43.19 | 36.70 |
ΣHREE | 1061.15 | 4771.48 | 2131.98 | 447.58 | 347.39 | 325.47 | 1928.40 | 391.67 | 244.29 | 408.64 |
Ybn/Lan | 19.12 | 10.99 | 17.74 | 3.82 | 23.23 | 14809.1 | 5.22 | 24.40 | 24.41 | 84.31 |
Smn/Lan | 2.42 | 9.63 | 4.94 | 2.25 | 7.10 | 78.22 | 3.59 | 4.89 | 5.75 | 1.86 |
T(Ti), C° | 859 | 1189 | 1373 | 946 | 858 | 654 | 1093 | 896 | 809 | 709 |
Grain | 206Pbc, % | Content, ppm | 232Th/238U | Corrected rations ± % (1s) | RhO | Age ± 1s, Ma | D, % | |||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
206Pb* | U | Th | 207Pb/206Pb | 207Pb/235U | 206Pb/238U | 206Pb/238U | 207Pb/206Pb | |||||
KV-45-4.2 | 0.191 | 406 | 3308 | 225 | 0.07 | 0.111 ± 16.0 | 2.19 ± 24.0 | 0.143 ± 18.4 | 0.8 | 861 ± 149 | 1814 ± 290 | +56 |
KV-45-1.2 | 0.052 | 350 | 2776 | 226 | 0.08 | 0.148 ± 3.9 | 2.98 ± 5.7 | 0.161 ± 4.2 | 0.7 | 882 ± 34 | 2318 ± 66 | +66 |
KV-45-2.1 | 0.075 | 277 | 1712 | 42 | 0.03 | 0.162 ± 2.3 | 4.21 ± 5.2 | 0.189 ± 4.7 | 0.9 | 1114 ± 48 | 2477 ± 38 | +60 |
KV-45-2.2 | 0.032 | 262 | 693 | 20 | 0.03 | 0.183 ± 0.2 | 11.10 ± 0.9 | 0.439 ± 0.9 | 1.0 | 2347 ± 18 | 2683 ± 4 | +15 |
KV-45-5.1 | 0.000 | 150 | 422 | 59 | 0.14 | 0.184 ± 0.8 | 10.84 ± 1.1 | 0.415 ± 0.7 | 0.7 | 2237 ± 14 | 2693 ± 13 | +20 |
KV-45-1.1 | 0.023 | 290 | 979 | 301 | 0.32 | 0.185 ± 0.2 | 8.80 ± 1.3 | 0.344 ± 1.3 | 1.0 | 1908 ± 22 | 2702 ± 4 | +34 |
KV-45-5.2 | 0.009 | 404 | 1032 | 84 | 0.08 | 0.186 ± 0.5 | 11.67 ± 1.5 | 0.456 ± 1.4 | 0.9 | 2421 ± 29 | 2704 ± 9 | +13 |
KV-45-6.1 | 0.006 | 417 | 1030 | 96 | 0.10 | 0.196 ± 0.6 | 12.75 ± 1.5 | 0.472 ± 1.4 | 0.9 | 2491 ± 28 | 2793 ± 10 | +13 |
KV-45-4.1 | 0.000 | 78 | 173 | 76 | 0.45 | 0.196 ± 0.4 | 14.19 ± 1.0 | 0.525 ± 0.9 | 0.9 | 2719 ± 20 | 2794 ± 7 | +3 |
KV-45-3.1 | 0.006 | 303 | 937 | 27 | 0.03 | 0.210 ± 0.4 | 10.93 ± 0.9 | 0.377 ± 0.8 | 0.9 | 2060 ± 13 | 2909 ± 7 | +34 |
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Kudryashov, N.M.; Udoratina, O.V.; Coble, M.A.; Steshenko, E.N. Geochronological and Geochemical Study of Zircon from Tourmaline-Muscovite Granites of the Archaean Kolmozero–Voronya Greenstone Belt: Insights into Sources of the Rare-Metal Pegmatites. Minerals 2020, 10, 760. https://doi.org/10.3390/min10090760
Kudryashov NM, Udoratina OV, Coble MA, Steshenko EN. Geochronological and Geochemical Study of Zircon from Tourmaline-Muscovite Granites of the Archaean Kolmozero–Voronya Greenstone Belt: Insights into Sources of the Rare-Metal Pegmatites. Minerals. 2020; 10(9):760. https://doi.org/10.3390/min10090760
Chicago/Turabian StyleKudryashov, Nikolay M., Oksana V. Udoratina, Matthew A. Coble, and Ekaterina N. Steshenko. 2020. "Geochronological and Geochemical Study of Zircon from Tourmaline-Muscovite Granites of the Archaean Kolmozero–Voronya Greenstone Belt: Insights into Sources of the Rare-Metal Pegmatites" Minerals 10, no. 9: 760. https://doi.org/10.3390/min10090760