Geol 101 Earth's Building Blocks Continued

Geol 101 Earth's Building Blocks Continued - Geol 107...

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Geol 107 Earth’s Building Blocks Continued 20/09/2007 12:42:00 Hardness and the Mohs Scale Hardness is a mineral’s relative resistance to scratching The Mohs relative harness scale o Copper penny = fluorite = H = 4 o Steel knife blade = feldspar = H = 6 Density Density is mass per unit volume (g/cm cubed) o High density (Au) atoms with high mass numbers that are closely packed o Low Density (Low) loosely packed atoms Common Minerals in Earth’s Crust 12 elements make up 99.23% of the crust 4,000 minerals have been ID, about 30 common Three Mineral Groups Silicate minerals (SiO4), the most abundant in Earth’s Crust Carbonates (CO3)2-, phosphate (PO4)3-, and sulfate (SO4)2-, minerals Ore minerals, sulifides and oxides that contain valuable metals Silicates Polymerization o Linking silicate tetrahedral by oxygen Table 2.2 Carbonates Carbonate anion, (CO3)2-
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o Calcite, aragonite o Dolomite o Figure 3.29 o Buffers Ph
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Geol 101 Earth's Building Blocks Continued - Geol 107...

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