Page 17 - Geologic Investigations in the Lake Valley Area, Sierra County, New Mexico
P. 17
Table 1. Major-element geochemistry of extrusive and intrusive rocks of Lake Valley map area.
[Oxide analysis by X-ray fluorescence; analyst, Joseph Taggart. LOI = loss on ignition. Numbers in ( ) are LOI-free normalized values and are
used in alkali-silica plots of figure 3]
Sample No. 1 2 3 4 5 6 7
Rubio Peak Fm.
112MM Trp
SiO2
TiO2 0.79
Rubio Peak Fm.
9LV Trp
63.0 (64.2)
0.72 16.4
4.09 0.05 1.48 3.50 4.20 (4.27) 3.33 (3.39) 0.33 1.86
98.86
8
Kneeling Nun Andesite of Tuff Sibley Mtn.
HL-5-71 100MM Tk Tta
72.0 60.8 (73.0) (61.8)
0.28 0.91 14.6 16.4
1.76 5.42 0.04 0.06 0.38 2.40 1.20 4.77 3.40 3.85 (3.44) (3.91) 4.80 2.54 (4.86) (2.58)
Trachydacite porphyry
144MM Tdp
66.8 (67.8)
0.35 16.0
3.46 0.14 0.62 2.13 4.63 (4.73) 3.38 (3.43) 0.24 1.49
99.24
Dacite of McClede Spring
4MM-3 Tsd
64.0 (65.4)
0.60 16.1
3.61 0.05 1.60 3.76 3.69 (3.77) 3.22 (3.29) 0.28 2.24
99.13
186MM1 Tb
46.5 (47.5)
1.90 15.7
12.4 0.19
6.56
8.52
3.47 (3.54) 1.68 (1.71) 0.53 2.16
99.61
Basaltic andesite, McClede Spring
104MM Tsa
52.7 (53.4)
1.27 16.0
8.08 0.11 5.72 8.73 3.39 (3.43) 1.31 (1.32) 0.59 1.29
99.19
Field No. Map unit
Al2O3 Total Fe MnO MgO CaO Na2O
K2O
P2O5 LOI
Total
16.4 5.39
0.04 1.95 3.24 2.90 (3.03) 4.51 (4.72) 0.34 4.68
99.24
Sample No.
Field No. Map unit
SiO2
0.10 1.45
100.01
9
Altered Vicks Peak Tuff
0.40 1.74
99.29
10
Intrusive trachy- andesite
48MM Ta2
55.3 (56.8)
1.12 18.1
6.42 0.08 2.84 5.83 4.55 (4.67) 1.80 (1.85) 0.47 2.80
99.31
59.0 (61.8)
TiO2 0.17 Al2O3 11.50 Total Fe 1.36 MnO 0.11 MgO <0.10 CaO 0.11 Na2O 3.91
0.14 8.04 1.00 0.07
<0.10 0.28 2.56
K2O
P2O5 LOI
Total
(3.91) (2.60) 4.54 3.19 (4.54) (3.24)
0.09 0.07 0.06 1.83
99.19 98.78
Vicks Peak Tuff
Basalt flow
24MM-1 109MM Tvp Tvp
76.8 81.6 (76.8) (83.1)
60.3
(61.0) (49.4)
0.89 1.40 16.1 15.9 5.72 11.9
0.08 0.19 2.81 6.68 4.99 8.52 3.77 3.79 (3.81) (3.82) 3.02 1.03 (3.05) (1.04) 0.42 0.43 1.11 0.90
99.21 99.74
11
Intrusive trachy- andesite
14MM Ta1
12
Basalt vent
186MM2 Tb
13
49.0
8 Geologic Investigations in the Lake Valley Area, Sierra County, New Mexico
