1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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- Modal composition
- RTG powder diffraction analysis
- DTA powder diffraction analysis
- Chemical composition
- Detail mineral composition
- Electron raster microscopy a electron microanalysis
- With the combination of these methods we are able to identify
provenience of the source material
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11
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12
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13
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14
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15
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16
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17
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18
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Chemical composition
a b c d e cz1-cz10 I1-I10
SiO2 54,6 57 63,2 44,1 59,5 47,25 42,09
CaO 3,8 6 4 12 2,1 19,31 17,8
Al2O3 16,4 10,9 13,2 17,3 19,3 6,4 14,46
MgO 1,9 2,2 2,1 2 0,2 2,28 2,17
K2O 3,9 1,5 2,6 3,1 2,01 3,69
Na2O 5,1 1,8 3,9 1,4 11,3 1,33 1,83
a – Rhinish, b- Bavarian trass, c - Santorine trass, d- Roman trass
(Segni), e- Neapolitan trass (Baisa),
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19
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Chemical composition
without CaO
a b c d e cz1-cz10 I1-I10
SiO2 54,6 57 63,2 44,1 59,5 47,25 42,09
Al2O3 16,4 10,9 13,2 17,3 19,3 6,4 14,46
MgO 1,9 2,2 2,1 2 0,2 2,28 2,17
K2O 3,9 1,5 2,6 3,1 2,01 3,69
Na2O 5,1 1,8 3,9 1,4 11,3 1,33 1,83
a – Rhinish trass, b- Bavarian trass, c - Santorine trass, d- Roman trass
(Segni), e- Neapolitan trass (Baisa),
cz- average value (10 samples), I -
average value (10 samples)
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20
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- The fragmental rocks (tuff) consists of pyroxene and plagioclase of glassy basalt. Magnification x 10,
PPL
- The glassy matrix in this rock
has an apparent discontinuous lamination caused by extreme compaction
and welding of original pumice fragments.Tuff. Magnification x 30, XPL
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21
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- A lazurite bearing variety. Magnification x 50, PPL
- The amygdaloidal texture in
alkali basalt. Magnification x 10, XPL
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22
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- Original pumice fragments in carbonate
matrix.Tuff. Magnification x 10, PPL
- Original pumice fragments in carbonate
matrix.Tuff. Magnification x 10, XPL
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23
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- Vitreous scoria, skeletal. Skeletal krystals aremade by pyroxene. Magnification
x 20, PPL
- Vitreous scoria, skeletal. Skeletal krystals aremade by pyroxene. Magnification
x 20, XPL
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24
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25
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26
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27
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28
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29
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30
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31
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32
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