Carbonates, Oxides, Olivine
Geology 203` with Popp at Texas A&M University
About this deck
By: Aileen Gaudinez
Textbook:
Introduction to Optical Mineralogy
Manual of Mineral Science (Manual of Mineralogy)
Created: 2010-11-09
Size: 12 flashcards
Views: 51
Textbook:
Introduction to Optical Mineralogy Manual of Mineral Science (Manual of Mineralogy)Created: 2010-11-09
Size: 12 flashcards
Views: 51
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What is the difference in the packing of the oxide anions between Mg2SiO4 olivine and Mg2SiO4 spinel?
olivine: oxide ions are in distorted HCP
spinel: oxide ions are in CCP
spinel: oxide ions are in CCP
Why does Mg2SiO4olivine not coexist with quartz?
Mg2SiO4+ SiO2 --> 2MgSiO3 which is enstatite.
Quartz cannot coexist with olivine until fo24 fa76
Quartz cannot coexist with olivine until fo24 fa76
Why does larnite (Ca2SiO4) have a crystal structure different from olivine?
null
Describe the physical properties of olivine in three words, all starting with the letter G.
Granular, Glassy, Green
What is the name given to a rock that is >95% olivine? What are the two major occurences of that rock type?
Dunite
?
?
Why does Mg2GeO4 with the olivine structure convert to the spinel polymorph at a lower pressure than Mg2SiO4 with the olivine structure?
Ge has a larger atomic radius than Si4+ , therefore it transforms into the spinel polymorph at lower pressures.
What are the major minerals in garnet peridotite?
Pyrope Garnet
Orthopyroxene
Clinopyroxene
Olivine
Orthopyroxene
Clinopyroxene
Olivine
Explain the factors that control the chemical compositions of naturally occuring garnets.
null
Al2SiO5
Sketch the P-T phase diagram of the aluminum silicate minerals, including values for temperature or pressure on the appropriate axis
Mg2SiO5 olivine is a major constituent of the upper mantle, but is not present in the lower mantle. Describe the phase changes involving Mg2SiO4 that occur in the Transition Zone of the mantle.
null
Kyanite and Sillimanite are stable together at high pressures and high temperatures, where andalusite is no longer stable
min. temp 500 degrees C
min pressure 4kbar
min. temp 500 degrees C
min pressure 4kbar
List the silicate sub-group to which each of the minerals belongs?
Al4Si4O10(OH)8
CaAl2Si2O7(OH)2*H2O
Al2SiO5
KAlSi3O8
Zn2SiO4
Ca2(Mg,Fe)5Si8O22(OH)2
Al4Si4O10(OH)8
CaAl2Si2O7(OH)2*H2O
Al2SiO5
KAlSi3O8
Zn2SiO4
Ca2(Mg,Fe)5Si8O22(OH)2
Al4Si4O10(OH)8 - Phyllo
CaAl2Si2O7(OH)2*H2O - Soro
Al2SiO5 - Neso
KAlSi3O8 - Tekto
Zn2SiO4 - Neso
Ca2(Mg,Fe)5Si8O22(OH)2 - Ino
CaAl2Si2O7(OH)2*H2O - Soro
Al2SiO5 - Neso
KAlSi3O8 - Tekto
Zn2SiO4 - Neso
Ca2(Mg,Fe)5Si8O22(OH)2 - Ino
About this deck
By: Aileen Gaudinez
Textbook: Introduction to Optical Mineralogy
Manual of Mineral Science (Manual of Mineralogy)
Created: 2010-11-09
Size: 12 flashcards
Views: 51
Textbook:
Introduction to Optical Mineralogy Manual of Mineral Science (Manual of Mineralogy)Created: 2010-11-09
Size: 12 flashcards
Views: 51
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy