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Author Question: Use Figure 6.18 to determine whether andalusite, kyanite, or sillimanite is stable under the ... (Read 74 times)

elizabeth18

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on: Jul 16, 2018
Use Figure 6.18 to determine whether andalusite, kyanite, or sillimanite is stable under the following pressure (P) and temperature (T) conditions:
 
   P = 1 kb, T = 500 C
   P = 2 kb, T = 650 C
   P = 4 kb, T = 450 C
   P = 5 kb, T = 650 C
  What will be an ideal response?

Question 2

Metamorphic changes include a change in mineral content, or a change in texture, or both. Determine the type of metamorphic change for each of the metamorphic changes listed below.
 
   Shale metamorphoses into a schist
   Dolostone metamorphoses near an intrusion to a rock containing calcite and periclase
   Graphite metamorphoses into diamond
   Quartz sandstone metamorphoses into quartzite
   Limestone metamorphoses into marble
  What will be an ideal response?


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efwsefaw

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Reply #1 on: Jul 16, 2018
Answer to Question 1

P = 1 kb, T = 500 C Andalusite stable
P = 2 kb, T = 650 C Sillimanite stable
P = 4 kb, T = 450 C Kyanite stable
P = 5 kb, T = 650 C Sillimanite stable

Answer to Question 2

Shale metamorphoses into a schist. mineralogy and texture
Dolostone metamorphoses near an intrusion to a rock containing calcite and periclase. mineralogy
Graphite metamorphoses into diamond. mineralogy
Quartz sandstone metamorphoses into quartzite. texture
Limestone metamorphoses into marble. texture


elizabeth18

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Reply 2 on: Jul 16, 2018
Gracias!

Bigfoot1984

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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