The Kilmar Magnesite Deposits: Evaporitic Metasediments in the Grenville Supergroup, Morin Terrane, Quebec
Abstract
:1. Introduction
2. Geologic Setting
3. Materials and Methods
4. Results and Discussion
4.1. Outcrop Description and Mineralogy
4.2. Oxygen and Carbon Isotope Ratios of Magnesite and Dolomite
4.3. Boron Isotope Ratios
4.4. Major and Trace Elements
5. Discussion
5.1. Comparison to Grenville Marbles in Nearby Terranes
5.2. Magnesite Ore Deposit Models
5.3. Regional Implications for Depositional Settings of Ores in Grenville Marbles
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample | L | δ13C (Dol)‰ | δ18O (Dol)‰ | δ13C (Mag)‰ | δ18O (Mag)‰ | δ11B‰ | %Mag | %Dol | %Serp | Distance (m) |
---|---|---|---|---|---|---|---|---|---|---|
GE-1 | D | 0.63 | 24.45 | 33 | 49 | 13 | 0 | |||
GE-2 | D | 0.44 | 23.71 | 9 | 63 | 28 | 1.1 | |||
GE-3 | M | 1.54 | 25.19 | 1.88 | 24.62 | 25 | 41 | 34 | 3.0 | |
GE-5 | D | −0.90 | 23.91 | 10 | 55 | 34 | 4.3 | |||
GE-6 | D | −1.10 | 24.67 | 10 | 43 | 47 | 5.2 | |||
GE-7 | D | −0.11 | 22.83 | 8 | 91 | 1 | 5.4 | |||
GE-8 | M | 1.36 | 23.20 | 1.27 | 24.79 | 12 | 49 | 39 | 5.7 | |
GE-9 | M | 1.61 | 26.15 | 1.81 | 25.56 | 15.5 | 40 | 25 | 35 | 5.9 |
GE-10 | D/M | 1.10 | 24.41 | 9 | 48 | 43 | 6.4 | |||
GE-11 | M | 1.63 | 25.91 | 1.75 | 25.51 | 15.5 | 41 | 32 | 27 | 7.0 |
GE-12 | M | 1.77 | 25.68 | 1.92 | 25.83 | 18.4 | 37 | 34 | 29 | 7.4 |
GE-13 | M | 1.83 | 25.58 | 1.82 | 25.42 | 34 | 35 | 30 | 7.8 | |
GE-14 | M | 1.77 | 26.20 | 1.73 | 25.60 | 56 | 18 | 26 | 8.0 | |
GE-15 | D | 0.85 | 24.30 | 6 | 53 | 41 | 8.1 | |||
GE-16 | D | −0.57 | 24.44 | 7 | 70 | 23 | 8.3 | |||
GE-17 | D | −0.88 | 24.29 | Tr | 33 | 67 | 8.7 | |||
GE-18 | D | −0.77 | 24.94 | 22.6 | 4 | 48 | 48 | 10.3 | ||
GE-20 | D | −0.17 | 24.34 | 31 | 27 | 42 | 11.9 | |||
GE-21 | D | 0.57 | 23.89 | 35 | 23 | 42 | 12.4 |
Sample | L | SiO2 wt% | Al2O3 wt% | Fe2O3 wt% | MnO wt% | CaO wt% | V ppm | Ni ppm | Zn ppm | Rb ppm | Sr ppm | Y ppm | Zr ppm |
GE-2 | D | 6.12 | 0.03 | 0.16 | 0.05 | 25.00 | 10 | <5 | 71 | <0.2 | 2920 | 12.5 | 2.8 |
GE-7 | D | 16.20 | 0.05 | 0.47 | 0.05 | 18.50 | 10 | 7 | 253 | 0.4 | 2040 | 6.8 | 0.7 |
GE-9 | M | 2.13 | 0.05 | 0.54 | 0.08 | 15.00 | 10 | 5 | 68 | <0.2 | 810 | 4.5 | <0.5 |
GE-11 | M | 2.64 | 0.05 | 0.52 | 0.08 | 9.38 | 23 | 6 | 77 | 0.3 | 510 | 4.2 | <0.5 |
GE-12 | M | 4.55 | 0.10 | 0.36 | 0.06 | 10.10 | 13 | <5 | 90 | 0.2 | 640 | 4.1 | <0.5 |
GE-18 | D | 20.40 | 0.04 | 0.37 | 0.09 | 15.20 | 19 | <5 | 278 | 0.2 | 1100 | 14.2 | 3.1 |
Sample | L | La ppm | Ce ppm | Pr ppm | Nd ppm | Sm ppm | Eu ppm | Gd ppm | Dy ppm | Ho ppm | Er ppm | Yb ppm | Lu ppm |
GE-2 | D | 2.8 | 7.9 | 0.7 | 3.3 | 0.6 | 0.22 | 0.97 | 1.69 | 0.37 | 1.24 | 1 | 0.14 |
GE-7 | D | 2.1 | 4.6 | 0.37 | 1.9 | 0.3 | 0.14 | 0.35 | 0.50 | 0.1 | 0.34 | 0.2 | <0.05 |
GE-9 | M | 0.5 | 2.4 | 0.18 | 1.2 | 0.1 | <0.05 | 0.18 | 0.41 | 0.06 | 0.27 | 0.1 | <0.05 |
GE-11 | M | 0.3 | 1.6 | 0.08 | 0.9 | <0.1 | <0.05 | 0.22 | 0.30 | 0.07 | 0.17 | 0.1 | <0.05 |
GE-12 | M | <0.1 | 2.0 | 0.11 | 1.1 | <0.1 | <0.05 | 0.21 | 0.32 | 0.07 | 0.20 | 0.1 | <0.05 |
GE-18 | D | 4.3 | 10.3 | 0.96 | 4.1 | 0.9 | 0.21 | 1.07 | 1.70 | 0.38 | 1.11 | 0.8 | 0.12 |
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Peck, W.H.; Eppich, G.R. The Kilmar Magnesite Deposits: Evaporitic Metasediments in the Grenville Supergroup, Morin Terrane, Quebec. Minerals 2019, 9, 554. https://doi.org/10.3390/min9090554
Peck WH, Eppich GR. The Kilmar Magnesite Deposits: Evaporitic Metasediments in the Grenville Supergroup, Morin Terrane, Quebec. Minerals. 2019; 9(9):554. https://doi.org/10.3390/min9090554
Chicago/Turabian StylePeck, William H., and Gary R. Eppich. 2019. "The Kilmar Magnesite Deposits: Evaporitic Metasediments in the Grenville Supergroup, Morin Terrane, Quebec" Minerals 9, no. 9: 554. https://doi.org/10.3390/min9090554