1. Heavy minerals in limestones from Bükk mountains, Hungary
Tímea Dobos
Ph.D. student
Institute of Geology and Mineralogy, University of Miskolc
Consultants:
Dr. Sándor Szakáll, Head of Department of Mineralogy and Petrology
Dr. Endre Dobos, Head of Department of Phisycal Geography

2. Same mineral composition
Why were the limestones investigated?
Different mineral composition
Soil
Soil-forming sediment
Same mineral composition
Bedrock
allochton
autochthon

3. The locations of the limestones
Bükk-Fennsík
Három-kő
Létrás-tető (Fehérkői Limesone Formation)
Három-kő
(Bükkfennsíki Limesone Formation)

4. Hypersceletic LEPTOSOL on Létrás-tető
Black Rendzina soil
on the top of Három-kő
Hypersceletic LEPTOSOL on Létrás-tető

5. The insoluble residuums were treated by Sodium Polythungstate
Environment-friendly heavy liquid
Fehérkő (g)
Három-kő (g)
Bükk-Fennsík (g)
> 125 µm
11,10
0,17
0,35 µm
17,03
0,40
0,33
< 45 µm
35,24
10,03
10,60
Total
63,37
11,28
The insoluble residuums that remained after 0,5- 0,5 kg limestone
Max. density 3.1 g/cm3

6. Bükk-Fennsík 125µm Pyrite Pyrite Fe-oxide Ilmenite Pyrite 102 db

7. Bükk-Fennsík 125-45 µm Hornblende Tremolite Kalkopyrite Kyanite
Pyrite an Kalkopyrite
41 db
Fe-oxide
65 db
Mn-oxide
4 db
Mica
33 db
Tremolite and Kyanite
12 db
Enstatite and Hornblende
Diopside
2 db
Kalkopyrite
Kyanite

8. Három-kő 125 µm Galenite Kyanite Apatite- Fe-oxide- Mica- K-feldspar
3 db
Fe-oxide-Mica-Apatite
Apatite-K-feldspar
95 %
Galenite
1 db
Kalkopryrite
Kyanite
Staurolite
Apatite-
Fe-oxide-
Mica-
K-feldspar
Staurolite

9. Három-kő 125-45 µm Hornblende Industrial Artifact Apatites Pyrite
25 db
Mn-oxide and Hornblende
116 db
Fe-oxide-Mica-Apatite
160 db
33 db
Jarosite
5 db
Industrial Artifact
4 db
Kalkopyrite
9 db
F-Apatite
70%
Apatites

10. Fehérkő 125 µm 125-45 µm Kyanite Fe-oxide-Mica Pyrite 20 db Diopside
K-feldspar
8 db
Fe-oxide-Mica
10 db
Kyanite and Andalusite
95%
Pyrite
101 db
Fe- and Al-oxides-Mica
71 db
Pyroxene
2 db
Ilmenite
Kyanite and Andalusite
90%
Kyanite
Fe-oxide-Mica

11. Andalusite in Fehérkő

12. Different Al:Si rate between kyanite and andalusite
Quantitative Results
Elt
Line
Int
Error K Kr W% A%
ZAF
Formula
Ox%
Cat# O
49.33
62.70
0.0000
0.00 Na Ka
101.2
0.0189
0.0071
1.28
1.13
0.5532
Na2O
1.73 Al
2715.5
0.4991
0.1876
24.07
18.14
0.7793
Al2O3
45.47 Si
2295.8
0.4496
0.1690
23.86
17.27
0.7081
SiO2
51.05
97.9
0.6187
0.0324
0.0122
1.46
0.76
0.8346
K2O
1.76
1.0000
0.3758
100.00
49.39
62.52
4510.2
0.6923
0.2620
33.14
24.88
0.7905
62.61
1881.2
0.3077
0.1164
17.48
12.60
0.6661
37.39
0.3784

13. Kyanite and Andalusite in the Bükk-mts.: How is that possible?
Chlorite Biotite Granate Staurolite Kyanite Sillimanite
Map of the metamorphic zones of Scotland. The country is the classical example of Barrovian metamorphic zoning and was the first place in the world where such zones were recognized, around 1915 by George Barrow. (
Pressure-temperature diagram showing the locations of the metamorphic facies. Modified from Spear (1993). The Al2SiO5 phase diagram is also shown for reference. And = andalusite; Ky = kyanite; Sil = sillimanite. (Whitney, D. University of Minnesota)

14. Thank you for your attention!