2.2. Use the normative mineralogy to answer the questions below. Basalts of High Mesas (Late Mt Taylor Basalt) Early Mt Taylor Basalt McCarty Flow Weight% Norm 68L-202-B 68L-213 68L-201-C 1.47 68L-217 68L-7-B Quartz 0. 0. Plagioclase 41.58 39.25 54.44 59.94 48.53 Orthoclase 5.56 6.50 7.68 10.05 4.31 Nepheline Diopside 7.84 10.20 15.99 15.35 8.82 6.44 14.63 Hypersthene (Opx) Olivine 11.49 9.36 19.88 12.64 12.16 6.44 6.89 Ilmenite 8.36 8.36 5.13 4.18 2.85 Magnetite 5.80 5.94 4.35 6.09 2.32 Apatite 2.18 2.25 1.58 2.32 0.65 Which samples are silica undersaturated, which are oversaturated? From the normative mineralogy and the major element compositions, what evolution trend do you see for Early and Late Mt Taylor basalts in terms of the silica saturation as well as the incompatible element? Explain the trend.
2.2. Use the normative mineralogy to answer the questions below. Basalts of High Mesas (Late Mt Taylor Basalt) Early Mt Taylor Basalt McCarty Flow Weight% Norm 68L-202-B 68L-213 68L-201-C 1.47 68L-217 68L-7-B Quartz 0. 0. Plagioclase 41.58 39.25 54.44 59.94 48.53 Orthoclase 5.56 6.50 7.68 10.05 4.31 Nepheline Diopside 7.84 10.20 15.99 15.35 8.82 6.44 14.63 Hypersthene (Opx) Olivine 11.49 9.36 19.88 12.64 12.16 6.44 6.89 Ilmenite 8.36 8.36 5.13 4.18 2.85 Magnetite 5.80 5.94 4.35 6.09 2.32 Apatite 2.18 2.25 1.58 2.32 0.65 Which samples are silica undersaturated, which are oversaturated? From the normative mineralogy and the major element compositions, what evolution trend do you see for Early and Late Mt Taylor basalts in terms of the silica saturation as well as the incompatible element? Explain the trend.
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Transcribed Image Text:2.2. Use the normative mineralogy to answer the questions below.
Basalts of High Mesas
(Late Mt Taylor Basalt)
68L-201-C
1.47
Early Mt Taylor Basalt
McCarty Flow
Weight% Norm
68L-202-B
68L-217
68L-7-B
68L-213
Quartz
0.
0.
Plagioclase
41.58
39.25
54.44
59.94
48.53
Orthoclase
5.56
6.50
7.68
10.05
4.31
Nepheline
Diopside
7.84
10.20
0.
15.99
15.35
8.82
6.44
14.63
Hypersthene (Opx)
Olivine
11.49
9.36
19.88
12.64
12.16
6.44
6.89
Ilmenite
8.36
8.36
5.13
4.18
2.85
Magnetite
5.80
5.94
4.35
6.09
2.32
Apatite
2.18
2.25
1.58
2.32
0.65
Which samples are silica undersaturated, which are oversaturated? From the normative mineralogy
and the major element compositions, what evolution trend do you see for Early and Late Mt
Taylor basalts in terms of the silica saturation as well as the incompatible element? Explain the
trend.
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