Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.
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Transcript of Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.
![Page 1: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/1.jpg)
Tweedle-dum and Tweedle-Dee: Phase Transitions
Myrmektite
![Page 2: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/2.jpg)
Solid State Phase Transformations
![Page 3: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/3.jpg)
Solid State Phase Transformations
![Page 4: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/4.jpg)
Solid State Phase Transformations
![Page 5: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/5.jpg)
Solid State Phase Transformations
![Page 6: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/6.jpg)
Solid State Phase Transformations
![Page 7: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/7.jpg)
Solid State Phase Transformations
![Page 8: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/8.jpg)
Silica: Rapid Cooling
![Page 9: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/9.jpg)
Silica: Rapid Cooling
![Page 10: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/10.jpg)
Silica: Rapid Cooling
Metastable tridymite and cristobalite are common in acid volcanic rocks
![Page 11: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/11.jpg)
Silica: Rapid Cooling
![Page 12: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/12.jpg)
Silica: Rapid Cooling
![Page 13: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/13.jpg)
Silica: Rapid Cooling
![Page 14: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/14.jpg)
Solid State Phase Transformations
![Page 15: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/15.jpg)
Solid State: Exsolution
![Page 16: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/16.jpg)
Alkali Feldspar
![Page 17: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/17.jpg)
High Temperature Alkali Feldspar
Found in volcanic rocksAnorthoclase, Mt Erebus
![Page 18: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/18.jpg)
Low Temperature Alkali Feldspar
Found in plutonic rocks
![Page 19: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/19.jpg)
Low Temperature Alkali Feldspar
Found in plutonic rocks
![Page 20: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/20.jpg)
Plagioclase Feldspar
Plagioclase Feldspars
Two Feldspars
Perthite
Microcline without perthite and anorthite
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Pyroxenes
![Page 22: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/22.jpg)
Pyroxenes
Ca-poor Px Ca-rich Px
Augite
Tem
pera
ture
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Pyroxenes
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Inverted Pigeonite
001
100
Thickest along the 001 plane
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Iron Meteorites and Cooling Rates
Widmanstatten Texture
Kamacite (low-Ni metal)Taenite (high-Ni metal)
![Page 26: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/26.jpg)
Iron Meteorites and Cooling Rates
![Page 27: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/27.jpg)
Liquid Immiscibility
![Page 28: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/28.jpg)
Liquid Immiscibility
![Page 29: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/29.jpg)
Liquid Immiscibility
Oldoinyo LengaiGregory Rift, Tanzania
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Liquid Immiscibility
Natrocarbonatite lavas
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Natrocarbonatite Lava
![Page 32: Tweedle-dum and Tweedle-Dee: Phase Transitions Myrmektite.](https://reader036.fdocuments.us/reader036/viewer/2022062422/56649f175503460f94c2d9fd/html5/thumbnails/32.jpg)
Liquid Immiscibility
Explosive eruptions of mixed silicate (nephelinite) – carbonatite ash
Carbonatite melt exsolves by liquid immiscibility from a nephelinite magma chamber