Introduction to Mineralogy Dr. Tark Hamilton Chapter 5: Lecture 17 Earth

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Introduction to MineralogyDr. Tark
HamiltonChapter 5 Lecture 17Earths Chemistry
Minerals

• Camosun College GEOS 250
• Lectures 930-1020 M T Th F300
• Lab 930-1220 W F300

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Ternary Plot Feldspar Composition
Sanidine
Solvus
Alkali Feldspars
Anorthoclase
Plagioclase
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Subdivisions of Earths interior
Oxygen 94 8 Elements99
Olivine
spinel
Granodiorite
Perovskite
Fe98 Ni2 Fe80 Ni20
Peridotite
1Kbar 100 MPa
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Widmanstaaten pattern Gibeon meteorite,
Namibia, FeNi (111) exsolution
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The Big 8 ElementsEarths Crust
Waters (Na gtCa2 gtK gtMg2 gtFe2 gtSiO2 ) Cl-
gt(HCO3) - gt(SO4)-2 TDSlt3ppt
Cumulative Cation Pore Volume
Estimates from Till Crustal Rocks
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Elemental composition of Crust
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Altaameem Meteorite, Iraq Chromite, Ilmentite,
Troilite
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Apollo 12 Oceanus ProcellarumBasalt Chromite,
Ulvospinel, FeNi
Pyroxene
Plagioclase
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Garnet Peridotite Alp Arami SZ
Woudloper
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Phase Transitions Peridotite
olivine
Spinel
perovskite
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Pressure compresses Volume
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Perovskite CaTiO3 Structure
Si4 Al3
Ca2 Mg2 Fe2