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Mimetite and polymineralic mimetite-pyromorphite-vanadinite single crystals from the Sowie Mts, Poland

Eligiusz Szełęg

Eligiusz Szełęg

Institute of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Szełęg, Eligiusz
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Janusz Janeczek

Janusz Janeczek

Institute of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Rafał Juroszek

Rafał Juroszek

Institute of Earth Sciences, University of Silesia in KatowiceSosnowiec, Poland
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Juroszek, Rafał
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Marta Danila

Marta Danila

Rodgau, Germany
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Danila, Marta
  
26 set 2024
Mimetite and polymineralic mimetite-pyromorphite-vanadinite single crystals from the Sowie Mts, Poland's Cover Image
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Categoria dell'articolo: Original Paper
Pubblicato online: 26 set 2024
Pagine: 48 - 59
Ricevuto: 07 gen 2024
Accettato: 31 lug 2024
DOI: https://doi.org/10.2478/mipo-2024-0005
Parole chiave
© 2024 Eligiusz Szełęg et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1.

SEM images of three morphological varieties of double-terminated mimetite crystals from the quartz-baryte vein in Grodziszcze. Images B, D, and F are close-ups of pyramidal faces of respective crystals A, C, and E.
SEM images of three morphological varieties of double-terminated mimetite crystals from the quartz-baryte vein in Grodziszcze. Images B, D, and F are close-ups of pyramidal faces of respective crystals A, C, and E.

Figure 2.

SEM images of pyromorphite from the quartz-baryte vein in Grodziszcze: (A) bundles of prismatic split-crystals on baryte; (B) aggregates of acicular crystals lining a cavity within baryte.
SEM images of pyromorphite from the quartz-baryte vein in Grodziszcze: (A) bundles of prismatic split-crystals on baryte; (B) aggregates of acicular crystals lining a cavity within baryte.

Figure 3.

SEM images of apparent vanadinite crystals from the quartz-baryte vein in Grodziszcze: (A) barrel-shaped crystal on baryte; (B) close-up of the tip of the crystal shown in (A); (C) another split-crystal of apparent vanadinite; (D) details of the sub-individuals of the crystal shown in (C).
SEM images of apparent vanadinite crystals from the quartz-baryte vein in Grodziszcze: (A) barrel-shaped crystal on baryte; (B) close-up of the tip of the crystal shown in (A); (C) another split-crystal of apparent vanadinite; (D) details of the sub-individuals of the crystal shown in (C).

Figure 4.

Raman spectra of mimetite from Tsumeb (Namibia) and Grodziszcze.
Raman spectra of mimetite from Tsumeb (Namibia) and Grodziszcze.

Figure 5.

BSE image of vanadinite-mimetite-pyromorphite crystal. Mim – mimetite, Pym – pyromorphite, Vna – vanadinite.
BSE image of vanadinite-mimetite-pyromorphite crystal. Mim – mimetite, Pym – pyromorphite, Vna – vanadinite.

Figure 6.

BSE image and X-ray elemental maps of As – Arsenic, V – Vanadium, and P – Phosphorus.
BSE image and X-ray elemental maps of As – Arsenic, V – Vanadium, and P – Phosphorus.

Figure 7.

Raman spectra of vanadinite from Mibladen (Morocco) and Grodziszcze.
Raman spectra of vanadinite from Mibladen (Morocco) and Grodziszcze.

Figure 8.

Ternary plot for mimetite-pyromorphite-vanadinite zones and overgrowths in the polymineralic crystal.
Ternary plot for mimetite-pyromorphite-vanadinite zones and overgrowths in the polymineralic crystal.

EPMA data for three types of mimetite crystals from Grodziszcze_

Crystal I Crystal II Crystal III
interior rim interior rim sectors:
Average* n = 4 1 2 3 Average* n = 5 1 2 1 n = 2 2 n = 2
wt%
SiO2 0.07(0.03-0.10) 0.11 0.22 0.27 0.21(0.13-0.29) 0.22 0.13 0.20 0.25
Bi2O3 0.35(0.28-0.46) 0.23 0.37 0.14 0.39(0.19-0.67) 0.27 0.28 0.27 0.23
PbO 73.04(72.31-73.54) 74.30 73.13 74.37 73.36(72.67-73.56) 74.56 73.62 73.34 74.08
CaO 0.08(0.04-0.18) 0.34 0.41 0.24 0.21(0.13-0.29) 0.27 0.77 0.38 0.21
P2O5 0.19(0.13-0.24) 1.62 2.24 3.26 0.93(0.82-1.02) 1.40 2.04 1.67 1.08
As2O5 22.13(21.91-22.33) 20.17 19.08 17.39 21.13(20.98-21.4) 20.23 19.82 20.31 20.83
V2O5 0.02(0.00-0.08) 0.06 0.06 0.10 0.02(0.00-0.08) 0.00 0.00 0.01 0.04
SO3 0.06(0.01-0.12) 0.05 0.15 0.15 0.07(0.01-0.14) 0.05 0.05 0.09 0.04
Cl 2.28(2.22-2.30) 2.20 2.32 2.28 2.23(2.20-2.25) 2.19 2.24 2.19 2.21
H2Oc 0.02 0.05 0.02 0.03 0.04 0.05 0.05 0.06 0.04
Total 98.24 99.13 98.00 98.23 98.59 99.24 99.00 98.52 99.01
2Cl=O 0.51 0.50 0.52 0.51 0.50 0.49 0.51 0.49 0.50
Totalc 97.73 98.63 97.48 97.72 98.09 98.75 98.49 98.03 98.51
apfu based on 12.5 anions
Bi 0.023 0.015 0.023 0.009 0.025 0.027 0.018 0.017 0.015
Pb 4.963 4.933 4.842 4.913 4.911 4.977 4.824 4.843 4.944
Ca 0.022 0.090 0.108 0.063 0.043 0.069 0.201 0.100 0.056
Σ 5.008 5.038 4.973 4.985 4.978 5.063 5.043 4.960 5.014
P 0.041 0.338 0.466 0.677 0.196 0.294 0.420 0.347 0.227
As 2.921 2.601 2.453 2.231 2.747 2.623 2.523 2.605 2.700
V 0.003 0.010 0.010 0.010 0.003 0.000 0.000 0.002 0.007
Si 0.018 0.027 0.054 0.066 0.052 0.055 0.032 0.098 0.062
S 0.011 0.009 0.028 0.028 0.013 0.009 0.009 0.017 0.007
Σ 2.994 2.986 3.011 3.012 3.011 2.980 2.984 3.019 3.003
Cl 0.975 0.920 0.967 0.948 0.940 0.920 0.924 0.910 0.928
OHc 0.025 0.080 0.033 0.052 0.060 0.080 0.076 0.090 0.072
Pym 1 12 16 23 7 10 14 12 8
Mim 99 88 84 77 93 90 86 88 92
Vna 0 0 0 0 0 - - 0 0

EPMA data for three regions within the polymineral mimetite-pyromorphite-vanadinite crystal shown in Fig_ 5_

Regions core intermediate
Spots: 1 PymI +VnaI 2 PymI +VnaI 3 PymI +VnaI 4 PymI +VnaI 5 PymI +VnaI 6 MimI 7 MimI 8 MimI 9 MimI 10 PymIII
wt%
SiO2 0.04 0.06 0.08 0.11 0.22 0.13 0.09 0.19 0.31 0.04
Bi2O3 0.23 0.49 0.42 0.46 0.31 0.46 0.30 0.42 0.20 0.29
PbO 79.60 78.58 77.71 79.09 75.97 73.67 74.64 74.13 72.47 78.89
CaO 0.13 0.56 0.26 0.23 0.17 0.13 0.14 0.12 0.53 0.34
FeO 0.00 0.00 0.00 0.00 0.13 0.00 0.10 0.07 0.00 0.00
ZnO 0.00 0.00 0.14 0.00 0.00 0.11 0.00 0.07 0.00 0.00
P2O5 14.23 13.78 12.20 10.40 1.13 0.88 1.52 0.72 1.34 14.13
As2O5 1.44 1.40 1.91 2.42 4.37 20.97 19.88 20.98 20.61 1.32
V2O5 0.11 0.36 2.27 4.01 13.65 0.00 0.07 0.00 0.00 0.00
SO3 0.09 0.05 0.17 0.09 0.16 0.00 0.00 0.06 0.08 0.03
Cl 2.39 2.35 2.36 2.33 2.11 2.31 2.26 2.26 2.20 2.32
H2Oc 0.04 0.05 0.05 0.06 0.09 0.01 0.02 0.02 0.05 0.05
Total 98.30 97.68 97.57 99.20 98.31 98.67 99.02 99.04 97.79 97.41
2Cl = O 0.54 0.53 0.53 0.53 0.48 0.52 0.51 0.51 0.50 0.52
Totalcor 97.76 97.15 97.04 98.67 97.83 98.15 98.51 98.53 97.29 96.89
apfu based on 12.5 anions
Bi 0.02 0.04 0.04 0.03 0.03 0.04 0.03 0.04 0.02 0.03
Pb 4.95 4.92 4.84 4.93 4.89 4.98 5.03 5.01 4.81 4.96
Ca 0.03 0.14 0.06 0.06 0.04 0.03 0.04 0.03 0.14 0.09
Fe 0.00 0.00 0.00 0.00 0.03 0.00 0.02 0.01 0.00 0.00
Zn 0.00 0.00 0.02 0.00 0.00 0.02 0.00 0.01 0.00 0.00
Σ 5.00 5.07 5.00 5.05 4.99 5.07 5.12 5.10 5.21 5.28
P 2.78 2.71 2.39 2.04 0.23 0.19 0.32 0.15 0.28 2.80
As 0.17 0.17 0.23 0.29 0.55 2.75 2.60 2.75 2.66 0.16
V 0.02 0.06 0.35 0.61 2.16 0.00 0.01 0.00 0.00 0.00
Si 0.01 0.01 0.02 0.03 0.05 0.03 0.02 0.05 0.08 0.01
S 0.02 0.01 0.03 0.02 0.03 0.00 0.00 0.01 0.01 0.01
Σ 3.00 2.94 3.01 2.96 3.02 2.97 2.91 2.96 3.19 3.10
Cl 0.94 0.93 0.93 0.91 0.85 0.98 0.96 0.96 0.92 0.92
OHc 0.06 0.08 0.07 0.09 0.15 0.02 0.04 0.04 0.08 0.08
Pym 94 92 80 69 8 6.5 11 5 9.5 95
Mim 6 6 8 10 19 93.5 89 95 90.5 5
Vna 0 2 12 21 73 0 0 0 0 0
Regions intermediate outermost
Spots: 11 MimII 12 MimII 13 MimII 14 VnaIII 15 VnaIII 16 VnaIII 17 VnaIII 18 VnaIII 19 VnaIII 20 VnaIII
SiO2 0.09 0.07 0.01 0.14 0.17 0.26 0.32 0.28 0.38 0.43
Bi2O3 0.36 0.17 0.37 0.39 0.43 0.37 0.32 0.15 0.52 0.29
PbO 73.53 75.15 73.98 75.41 75.67 76.00 76.39 76.94 75.39 75.46
CaO 0.57 0.21 0.21 0.04 0.03 0.05 0.01 0.03 0.10 0.05
FeO 0.00 0.04 0.16 0.11 0.00 0.00 0.01 0.00 0.05 0.18
ZnO 0.00 0.08 0.16 0.00 0.00 0.00 0.01 0.00 0.05 0.18
P2O5 1.40 2.09 1.59 0.37 0.26 0.31 0.20 0.21 0.70 0.49
As2O5 20.59 19.49 20.25 1.38 0.93 1.31 0.55 0.58 3.10 1.58
V2O5 0.11 0.05 0.08 19.46 19.11 18.99 20.09 19.46 16.81 17.54
SO3 0.14 0.09 0.07 0.07 0.03 0.08 0.05 0.15 0.03 0.02
Cl 2.18 2.32 2.03 2.21 2.17 2.27 2.22 2.15 2.15 2.15
H2Oc 0.06 0.02 0.09 0.11 0.10 0.09 0.11 0.11 0.11 0.10
Total 99.03 99.78 99.00 99.69 98.90 99.73 100.28 100.06 99.39 98.37
2Cl = O 0.49 0.52 0.46 0.50 0.49 0.51 0.49 0.49 0.49 0.49
Totalcor 98.54 99.26 98.54 99.19 98.41 99.22 99.79 99.57 98.90 97.88
apfu based on 12.5 anions
Bi 0.03 0.02 0.03 0.03 0.04 0.03 0.03 0.01 0.05 0.03
Pb 4.84 4.96 4.91 4.55 4.69 4.64 4.61 4.70 4.63 4.72
Ca 0.15 0.06 0.06 0.01 0.01 0.01 0.00 0.01 0.02 0.01
Fe 0.00 0.01 0.03 0.02 0.00 0.00 0.00 0.00 0.01 0.04
Zn 0.00 0.01 0.03 0.00 0.00 0.00 0.00 0.00 0.01 0.03
Σ 4.87 5.06 5.06 4.61 4.74 4.68 4.64 4.72 4.72 4.83
P 0.29 0.43 0.33 0.07 0.05 0.06 0.04 0.04 0.14 0.10
As 2.63 2.50 2.61 0.16 0.11 0.16 0.06 0.07 0.37 0.19
V 0.02 0.01 0.01 2.88 2.91 2.85 2.97 2.92 2.53 2.70
Si 0.02 0.02 0.00 0.03 0.04 0.06 0.07 0.06 0.09 0.10
S 0.03 0.02 0.01 0.01 0.01 0.01 0.01 0.04 0.01 0.00
Σ 2.99 2.98 2.96 3.15 3.12 3.14 3.15 3.13 3.14 3.09
Cl 0.90 0.96 0.85 0.84 0.85 0.87 0.84 0.83 0.83 0.85
OHc 0.10 0.04 0.15 0.16 0.15 0.13 0.16 0.17 0.17 0.15
Pym 15 15 11 2 2 2 1 1.3 5 3
Mim 85 85 89 5 3 5 2 2.3 12 7
Vna 0 0 0 93 95 93 97 96.4 83 90
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