Download Guidebook as .pdf (2.2 Mb) - Carolina Geological Society
Download Guidebook as .pdf (2.2 Mb) - Carolina Geological Society
Download Guidebook as .pdf (2.2 Mb) - Carolina Geological Society
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2008 annual meeting – Spruce Pine Mining District: Little Switzerland, North <strong>Carolina</strong><br />
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Table 3. Representative garnet compositions from the LUF1 pegmatite.<br />
Sample # and analysis location<br />
7 core 7 rim 10 core 12 core 17 core 17 rim<br />
SiO 2 35.51 35.53 35.64 36.06 35.36 35.80<br />
Al 2 O 3 19.83 19.70 20.05 20.79 19.45 20.42<br />
TiO 2 0.06 0.00 0.03 0.00 0.07 0.00<br />
FeOt 17.37 24.22 19.54 23.45 22.34 22.90<br />
MnO 20.66 15.96 19.04 15.72 15.68 15.58<br />
MgO 0.58 0.81 0.68 0.93 0.97 0.98<br />
CaO 3.01 2.16 2.79 1.97 2.40 2.37<br />
Total 97.01 98.38 97.77 98.91 96.26 98.05<br />
Cations b<strong>as</strong>ed on 12 oxygens<br />
Si 2.9952 2.9775 2.9856 2.9778 3.0054 2.9805<br />
Al 1.9709 1.9457 1.9799 2.0230 1.9484 2.0035<br />
Ti 0.0036 0.0000 0.0019 0.0000 0.0044 0.0000<br />
Fe 1.2253 1.6971 1.3685 1.1690 1.5878 1.5944<br />
Mn 1.4758 1.1328 1.3510 1.0991 1.1285 1.0990<br />
Mg 0.0726 0.1016 0.0844 0.1149 0.1226 0.1217<br />
Ca 0.2720 0.1943 0.2508 0.1739 0.2184 0.2116<br />
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Page 28<br />
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