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Cadomian protolith ages of exotic mega blocks from Bugaj and Andrychów (Western outer Carpathians, Poland) and their palaeogeographic significance

Jolanta Burda
Jolanta Burda
, 
Beata Woskowicz-Ślęzak
Beata Woskowicz-Ślęzak
, 
Urs Klötzli
Urs Klötzli
 and 
Aleksandra Gawęda
Aleksandra Gawęda
   | Feb 22, 2019
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Article Category: Regular Articles
Published Online: Feb 22, 2019
Page range: 25 - 36
Received: Apr 09, 2018
Accepted: Jan 14, 2019
DOI: https://doi.org/10.1515/geochr-2015-0102
Keywords
© 2018 J. Burda et al, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Simplified geological map of the Polish part of the Western Carpathians (after Żelaźniewicz el al., 2011, modified) with the location of the investigated samples (shown as yellow dots).
Simplified geological map of the Polish part of the Western Carpathians (after Żelaźniewicz el al., 2011, modified) with the location of the investigated samples (shown as yellow dots).

Fig. 2

Field photo (a) of the Bugaj granitoid (sample Bu1) and field photo (b) of the Andrychów orthogneiss (sample An).
Field photo (a) of the Bugaj granitoid (sample Bu1) and field photo (b) of the Andrychów orthogneiss (sample An).

Fig. 3

Classification position of the Bugaj granitoids in: (a) alkali (K2O + Na2O) versus SiO2 (TAS) classification diagram (Middlemost, 1985); (b) Primitive mantle-normalized (Sun and McDonough, 1989) multielement “spider” diagrams; (c) classification position of the Bugaj granitoids in Multicationic R1–R2 diagram (De La Roche et al.,1980), with fields numbered according to Batchelor and Bowden (1985); 1 – mantle fractionates, 2 – pre-plate collision suites, 3 – post-collision suites, 4 – late orogenic magmas, 5 – anorogenic suites, 6 – syncollisional (anatectic) suites. R1 = 4Si − 11(Na + K) − 2(Fe + Ti); R2 = 6Ca + 2 Mg + Al.
Classification position of the Bugaj granitoids in: (a) alkali (K2O + Na2O) versus SiO2 (TAS) classification diagram (Middlemost, 1985); (b) Primitive mantle-normalized (Sun and McDonough, 1989) multielement “spider” diagrams; (c) classification position of the Bugaj granitoids in Multicationic R1–R2 diagram (De La Roche et al.,1980), with fields numbered according to Batchelor and Bowden (1985); 1 – mantle fractionates, 2 – pre-plate collision suites, 3 – post-collision suites, 4 – late orogenic magmas, 5 – anorogenic suites, 6 – syncollisional (anatectic) suites. R1 = 4Si − 11(Na + K) − 2(Fe + Ti); R2 = 6Ca + 2 Mg + Al.

Fig. 4

Secondary electron (SE) images of selected zircon crystals from granite sample Bu1. See text for description.
Secondary electron (SE) images of selected zircon crystals from granite sample Bu1. See text for description.

Fig. 5

Compiled cathodoluminescence (CL) images showing the range of textures observed in zircon crystals from granite sample Bu1. See text for details. The white rectangles show the approximate location of laser ablation trenches (confirmed by re-inspecting grains under CL after the LA analysis) and are not to scale. The numbers refer to the analytical data presented in Table 3.
Compiled cathodoluminescence (CL) images showing the range of textures observed in zircon crystals from granite sample Bu1. See text for details. The white rectangles show the approximate location of laser ablation trenches (confirmed by re-inspecting grains under CL after the LA analysis) and are not to scale. The numbers refer to the analytical data presented in Table 3.

Fig. 6

Tera-Wasserburg diagrams presenting the U/Pb age of the zircons from granite sample Bu1: a) all data points; b) concordant to sub-concordant data points. The inherited xenocryst (p2Bu_23) and the three data points showing recent lead loss (p3Bu_01/1, p3Bu_01/1, p3Bu_09/1) are not shown.
Tera-Wasserburg diagrams presenting the U/Pb age of the zircons from granite sample Bu1: a) all data points; b) concordant to sub-concordant data points. The inherited xenocryst (p2Bu_23) and the three data points showing recent lead loss (p3Bu_01/1, p3Bu_01/1, p3Bu_09/1) are not shown.

Fig. 7

Secondary electron (SE) images of selected zircon crystals from orthogneiss sample An. See text for description.
Secondary electron (SE) images of selected zircon crystals from orthogneiss sample An. See text for description.

Fig. 8

Compiled cathodoluminescence (CL) images showing the range of textures observed in zircon crystals from orthogneiss sample An. See text for details. The white rectangles show the approximate location of laser ablation trenches (confirmed by re-inspecting grains under CL after the LA analysis) and are not to scale. The numbers refer to the analytical data presented in Table 3.
Compiled cathodoluminescence (CL) images showing the range of textures observed in zircon crystals from orthogneiss sample An. See text for details. The white rectangles show the approximate location of laser ablation trenches (confirmed by re-inspecting grains under CL after the LA analysis) and are not to scale. The numbers refer to the analytical data presented in Table 3.

Fig. 9

Tera-Wasserburg diagrams for isotopic ratio for zircon crystals from orthogneiss sample An: a) all data points; b) concordant to sub-concordant data points defining a discordia line with a lower intercept of 542 ± 21 Ma (forced through data point p3An_06/1). The inherited xenocrysts (p3An_06/1, p3An_06/2) and the two data points showing recent lead loss (p3An_08, p3An_13) are not shown.
Tera-Wasserburg diagrams for isotopic ratio for zircon crystals from orthogneiss sample An: a) all data points; b) concordant to sub-concordant data points defining a discordia line with a lower intercept of 542 ± 21 Ma (forced through data point p3An_06/1). The inherited xenocrysts (p3An_06/1, p3An_06/2) and the two data points showing recent lead loss (p3An_08, p3An_13) are not shown.

Rb-Sr and Sm-Nd whole rock isotope analysis of Bugaj granitoid rocks.

Isotope data 87Rb/86Sr ±2sm 87Sr/86Sr ±2sm 147Sm/144Nd ±2sm 143Nd/144Nd ±2sm Sr(580 Ma) Nd(580 Ma) Nd(CHUR)
Bugaj1 3.154 0.032 0.756053 0.000004 0.1521 0.0015 0.512397 0.000004 0.729966 0.511819 –1.4
Bugaj2 3.236 0.032 0.755499 0.000004 0.1366 0.0014 0.512428 0.000005 0.728739 0.511909 0.4

Chemical composition and selected petrological indicators of Bugaj granitoid rocks.

Sample No Bu1 Bu2 BuC
SiO2 71.56 67.58 60.03
TiO2 0.38 0.7 0.98
Al2O3 14.13 14.89 16.63
Fe2O3T 3.04 5.31 8.32
MnO 0.06 0.09 0.14
MgO 0.77 1.34 2.46
CaO 0.92 1.5 1.89
Na2O 3.36 3.83 3.33
K2O 4.79 3.36 4.86
P2O5 0.11 0.22 0.18
LOI 0.71 1.13 0.9
Total 99.83 99.95 99.72
Sr 121.2 128 152.3
Ba 578 562 793
Rb 135.6 146.9 219.3
Cs 8.3 10.3 13.1
Th 11 11.7 1.3
U 2.6 1.4 10.1
Ga 16 20.4 20.5
Cr 82 109.5 116.3
Ni 11 14 27.9
V 43 75 135
Zr 150.9 283.6 226.8
Hf 4.9 7.6 6.2
Y 42.9 37.9 27
Nb 9.8 15.4 16.1
Ta 0.8 1.1 0.9
La 24.6 30.3 27.9
Ce 52.6 62.4 61.9
Pr 6.35 7.56 7.06
Nd 24.7 30.6 27.3
Sm 5.96 6.63 5.64
Eu 0.75 0.87 1.01
Gd 6.04 6.9 5.45
Tb 0.99 0.99 0.89
Dy 6.96 6.97 4.9
Ho 1.49 1.3 0.95
Er 4.32 3.62 3.1
Tm 0.69 0.56 0.41
Yb 4.56 3.67 2.69
Lu 0.64 0.5 0.42
ASI 1.17 1.23 1.21
#mg 0.56 0.7 0.31
Rb/Sr 1.12 1.15 1.44
ΣREE 140.65 162.87 149.62
Eu/Eu* 0.8 0.39 0.56
CeN/YbN 3.18 4.68 6.34
ThN/UN 1.04 2.06 0.03
TZr [°C] 798 850 818

LA-MC-ICP-MS U–Pb zircon data from exotic mega blocks (samples An and Bu1).

Sample Blank corrected intensities Concentrations Atomic ratios Ages
Crystal 204Pb 206Pb 207Pb 208Pb 232Th 238U Pb Th U Th/U 206Pb 204Pb 2RSE 207Pb 235U 2RSE 206Pb 238U 2RSE 207Pb Rho 206Pb 2RSE 208Pb 206Pb 2RSE 208Pb 232Th 2RSE 238U 206Pb 2RSE 207Pb 206Pb 2RSE 206/238 age 2SD 206/207 age 2SD
(V) ×10-6 (V) ×10-4 (V) ×10-5 ×(10V) -5 ×(10V) -3 (V) ×10-2 (wppm) (%) (%) (%) (%) (%) (%) (%) (%) (Ma)
Andrychów An
p3An_02 6.10 39.0 23.0 51.0 11.0 6.30 10.1 24.4 139.9 0.17 908 8 0.6716 3.9 0.0795 3.8 0.48 0.0606 1.3 0.4316 4.9 0.0316 6.9 12.575 3.8 0.0606 1.3 493 19 624 29
p3An_03/1 7.00 68.0 41.0 97.0 28.0 10.0 17.7 64.8 140.6 0.46 1037 20 0.8044 6.3 0.0894 8.3 0.65 0.0642 4.3 0.4994 16.0 0.0228 13.1 11.189 8.3 0.0642 4.3 552 46 750 92
p3An_03/2 15.0 65.0 47.0 92.0 18.0 13.0 17.2 41.5 141.1 0.29 810 27 0.6698 10.3 0.0725 17.4 0.85 0.0681 16.1 0.4145 11.5 0.0357 22.5 13.799 17.4 0.0681 16.1 451 78 871 334
p3An_04/1 4.20 42.0 23.0 37.0 9.60 6.20 10.4 21.9 139.9 0.16 1241 8 0.7043 11.8 0.0873 10.8 0.46 0.0587 1.3 0.2440 11.8 0.0253 10.6 11.448 10.8 0.0587 1.3 540 58 554 29
p3An_04/2 4.90 35.0 20.0 41.0 11.0 4.90 9.1 25.3 139.7 0.18 1130 10 0.7178 12.0 0.0885 9.6 0.40 0.0591 2.5 0.3477 6.1 0.0224 10.3 11.295 9.6 0.0591 2.5 547 53 572 54
p3An_06/1 4.40 120 140 220 14.0 3.70 33.3 31.8 139.5 0.23 3187 14 7.2106 12.5 0.3956 13.2 0.53 0.1319 1.3 0.5778 4.2 0.0870 25.5 2.528 13.2 0.1319 1.3 2149 284 2123 23
p3An_06/2 5.00 190 200 98.0 7.90 9.20 47.1 18.1 140.4 0.13 nd nd 4.2498 7.3 0.2650 8.7 0.59 0.1138 1.1 0.1669 23.5 0.0849 10.1 3.774 8.7 0.1138 1.1 1515 132 1861 20
p3An_07 4.70 64.0 38.0 80.0 25.0 10.0 16.5 58.1 140.5 0.41 1767 16 0.7138 9.9 0.0800 14.2 0.71 0.0646 3.7 0.3529 8.5 0.0219 14.5 12.500 14.2 0.0646 3.7 496 70 761 79
p3An_08 5.00 150 140 170 17.0 8.00 39.9 39.3 140.2 0.28 3863 15 3.0343 15.2 0.2317 15.5 0.51 0.0947 0.5 0.3318 5.8 0.0696 10.8 4.316 15.5 0.0947 0.5 1343 208 1521 9
p3An_09 6.60 70.0 43.0 120 31.0 10.0 18.8 70.9 140.5 0.50 1540 15 0.8438 9.6 0.0933 11.5 0.60 0.0644 3.7 0.4983 7.2 0.0267 10.5 10.717 11.5 0.0644 3.7 575 66 753 79
p3An_10 5.80 55.0 32.0 93.0 28.0 7.20 14.7 63.3 140.1 0.45 1259 2 0.8063 5.7 0.0950 5.6 0.49 0.0613 0.9 0.4459 2.9 0.0224 8.3 10.523 5.6 0.0613 0.9 585 33 649 20
p3An_11 6.90 24.0 17.0 33.0 8.5 3.50 6.3 19.4 139.5 0.14 580 19 0.9325 10.9 0.0969 9.3 0.43 0.0690 8.6 0.3371 12.2 0.0261 15.1 10.317 9.3 0.0690 8.6 596 55 899 177
p3An_12/1 4.60 47.0 27.0 10.0 2.2 6.90 11.0 5.1 140.0 0.04 nd nd 0.6993 8.5 0.0850 9.1 0.53 0.0595 0.7 0.0568 8.1 0.0301 7.2 11.764 9.1 0.0595 0.7 526 48 587 15
p3An_12/2 4.90 19.0 12.0 16.0 5.5 2.40 4.8 12.5 139.3 0.09 473 11 1.0174 17.2 0.1134 15.9 0.46 0.0642 3.8 0.2989 40.0 0.0204 18.4 8.821 15.9 0.0642 3.8 692 110 750 80
p3An_13 25.0 52.0 67.0 110 19.0 13.0 15.1 43.7 141.1 0.31 193 40 0.9691 11.9 0.0507 22.8 0.96 0.1481 17.2 0.6235 26.8 0.0780 39.6 19.741 22.8 0.1481 17.2 319 73 2324 295
Bugaj Bu1
p2Bu_01 14.0 44.0 37.0 63.0 12.0 5.80 11.8 27.5 139.8 0.20 341 14 0.8705 5.0 0.0947 4.0 0.40 0.0624 3.7 0.2605 7.2 0.0209 7.4 10.560 4.0 0.0624 3.7 583 23 688 79
p2Bu_05 nd 44.0 28.0 85.0 12.0 4.50 12.0 27.2 139.6 0.19 nd nd 0.8737 6.3 0.1071 6.6 0.52 0.0592 0.9 0.5936 20.8 0.0263 8.7 9.341 6.6 0.0592 0.9 656 43 573 19
p2Bu_08 6.80 58.0 38.0 81.0 11.0 6.60 15.3 26.3 140.0 0.19 1018 11 0.7378 6.4 0.0896 7.1 0.55 0.0597 1.1 0.3524 8.2 0.0217 6.6 11.157 7.1 0.0597 1.1 553 39 592 25
p2Bu_10/1 50.0 85.0 93.0 180 190 16.0 24.6 435.3 141.5 3.08 931 187 0.7942 38.6 0.1102 177.8 2.31 0.0287 1356 0.0650 3667 0.0207 217.6 9.073 177.8 0.0287 1356 674 1199 - -
p2Bu_10/2 25.0 180 120 270 38.0 20.0 47.8 87.8 142.3 0.62 946 6 0.7912 8.6 0.0928 9.0 0.52 0.0611 2.9 0.3029 10.6 0.0221 7.9 10.776 9.0 0.0611 2.9 572 52 643 62
p2Bu_19 17.0 89.0 57.0 76.0 9.70 10.0 22.4 22.1 140.6 0.16 nd nd 0.7638 3.2 0.0967 3.1 0.49 0.0575 0.4 0.3044 42.1 0.0244 5.9 10.339 3.1 0.0575 0.4 595 18 510 9
p2Bu_23 14.0 110 130 270 11.0 4.30 33.5 26.1 139.6 0.19 992 1 4.6704 5.0 0.3121 4.5 0.45 0.1084 1.3 0.5018 4.7 0.0751 6.1 3.204 4.5 0.1084 1.3 1751 78 1773 25
p2Bu_30 7.80 88.0 56.0 170 22.0 10.0 24.0 50.8 140.6 0.36 nd nd 0.7806 9.3 0.0978 7.6 0.41 0.0578 1.7 0.3649 33.3 0.0237 14.5 10.229 7.6 0.0578 1.7 601 46 524 37
2Bu_32 9.90 54.0 35.0 50.0 5.80 5.90 13.7 13.3 139.9 0.09 801 3 0.7487 5.2 0.0931 5.6 0.54 0.0584 0.7 0.2113 22.7 0.0269 5.1 10.742 5.6 0.0584 0.7 574 32 546 15
p2Bu_35/1 8.60 59.0 38.0 53.0 6.10 6.90 14.8 14.1 140.0 0.10 723 8 0.7295 5.2 0.0877 7.3 0.70 0.0598 2.1 0.2684 25.8 0.0252 16.0 11.405 7.3 0.0598 2.1 542 40 597 45
p2Bu_35/2 7.80 84.0 56.0 39.0 4.10 8.90 20.4 9.5 140.4 0.07 863 74 0.8119 24.6 0.0960 34.0 0.69 0.0606 6.9 0.1682 122.6 0.0356 36.3 10.420 34.0 0.0606 6.9 591 201 624 149
p3Bu_01/1 11.0 61.0 51.0 69.0 55.0 12.0 15.8 125.9 140.9 0.89 546 30 0.7773 8.6 0.0692 4.3 0.25 0.0839 9.0 0.4171 20.2 0.0128 21.3 14.460 4.3 0.0839 9.0 431 19 1290 176
p3Bu_01/2 4.60 15.0 11.0 17.0 11.0 2.10 3.8 25.3 139.2 0.18 nd nd 0.8730 17.3 0.0946 11.9 0.35 0.0646 19.5 0.3371 54.8 0.0198 24.3 10.569 11.9 0.0646 19.5 583 69 762 412
p3Bu_01/3 17.0 48.0 42.0 120 83.0 8.30 14.0 189.3 140.3 1.35 453 22 0.8695 6.4 0.0800 9.1 0.71 0.0814 10.4 0.9599 19.5 0.0218 15.0 12.506 9.1 0.0814 10.4 496 45 1232 204
p3Bu_03/1 nd 1.80 1.10 1.20 0.740 0.250 0.4 1.7 138.9 0.01 nd nd 0.9325 36.6 0.1145 39.4 0.54 0.0599 6.2 0.2290 15.0 0.0153 106.6 8.736 39.4 0.0599 6.2 699 276 599 135
p3Bu_03/2 4.20 0.780 0.51 0.57 0.390 0.110 0.2 0.9 138.9 0.01 40 11 0.9258 14.2 0.1104 13.4 0.47 0.0609 4.3 0.2333 6.9 0.0196 16.7 9.054 13.4 0.0609 4.3 675 90 636 92
p3Bu_04 4.00 0.980 0.67 0.50 0.350 0.150 0.2 0.8 138.9 0.01 nd nd 0.8442 21.7 0.0930 23.3 0.54 0.0646 9.0 0.1726 20.3 0.0140 70.5 10.749 23.3 0.0646 9.0 573 133 761 189
p3Bu_09/1 42.0 33.0 52.0 120 76.0 7.30 10.8 175.0 140.1 1.25 199 25 2.1793 196.9 0.1178 133.3 0.34 0.1021 96.8 0.7533 129.5 0.0158 695.3 8.488 133.3 0.1021 96.8 718 957 1663 1791
p3Bu_09/2 5.80 35.0 24.0 75.0 29.0 5.50 9.7 66.8 139.8 0.48 720 4 0.8187 4.0 0.0926 2.4 0.29 0.0645 3.6 0.9196 17.5 0.0279 4.4 10.799 2.4 0.0645 3.6 571 13 758 76
p3Bu_10 nd 16.0 10.0 30.0 12.0 2.50 4.4 26.7 139.3 0.19 nd nd 0.7826 1.9 0.0956 1.7 0.44 0.0592 0.6 0.6439 3.7 0.0284 2.2 10.459 1.7 0.0592 0.6 589 10 576 13
p3Bu_12 5.40 32.0 20.0 31.0 12.0 4.90 8.1 26.9 139.7 0.19 567 6 0.7593 11.7 0.0936 10.2 0.44 0.0588 3.2 0.4832 241.3 0.0287 19.4 10.679 10.2 0.0588 3.2 577 59 559 69
p3Bu_13/1 4.60 24.0 15.0 23.0 8.10 3.60 6.0 18.6 139.5 0.13 nd nd 0.7762 3.9 0.0943 4.9 0.63 0.0596 1.9 0.5016 75.8 0.0295 21.6 10.603 4.9 0.0596 1.9 581 28 589 41
p3Bu_13/2 6.80 15.0 9.90 8.10 6.40 2.30 3.6 14.7 139.3 0.11 346 61 0.8443 39.7 0.0908 21.5 0.27 0.0670 27.5 0.2070 122.8 0.0159 110.5 11.014 21.5 0.0670 27.5 560 120 838 573
p3Bu_14 4.00 16.0 9.80 15.0 5.90 2.40 4.0 13.4 139.3 0.10 119 15 0.7477 4.0 0.0892 4.6 0.58 0.0607 0.9 0.5905 20.3 0.0288 5.2 11.216 4.6 0.0607 0.9 551 25 630 20
p3Bu_15 5.30 2.10 1.60 3.20 1.70 0.320 0.6 4.0 138.9 0.03 52 12 0.9670 14.2 0.0905 13.8 0.49 0.0762 7.9 0.5176 12.7 0.0196 17.1 11.045 13.8 0.0762 7.9 559 77 1099 158
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