INSTABILITY OF A12SIO5 "TRIPLE-POINT" ASSEMBLAGES IN MUSCOVITE+BIOTITE+QUARTZ-BEARING METAPELITES, WITH IMPLICATIONS
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.
dc.contributor.author | Pattison D.R.M. | |
dc.date.accessioned | 2021-02-13T08:02:34Z | |
dc.date.available | 2021-02-13T08:02:34Z | |
dc.date.issued | 2001 | |
dc.identifier | https://elibrary.ru/item.asp?id=32157521 | |
dc.identifier.citation | American Mineralogist, 2001, 86, 11-12, 1414-1422 | |
dc.identifier.issn | 0003-004X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/24874 | |
dc.description.abstract | This paper uses constraints from experiments, thermodynamic modeling, and natural mineral assemblages to argue that Al2SiO5 "triple-point" assemblages, in which all three Al2SiO5 minerals are in stable equilibrium, are not possible in common muscovite(Ms)+biotite(Bt)+quartz(Qtz)-bearing metapelitic rocks because the reactions that first introduce an Al2SiO5 mineral to these bulk compositions occur at higher temperature than the triple point. Less-common, highly aluminous bulk compositions may develop Al2SiO5 minerals at temperatures below the triple point such that stable triple-point assemblages are theoretically possible. The "invisibility" of the triple-point to common Ms+Bt+Qtz-bearing metapelites calls into question most metapelitic triple-point localities reported in the literature, and carries implications for the topology of the metapelitic petrogenetic grid, the bathozone/bathograd scheme of Carmichael (1978), and the possibility of prograde kyanite → andalusite → sillimanite sequences. Re-examination of reported triple-point localities suggests that in most if not all cases, the Al2SiO5 minerals grew at different times in the metamorphic history of the rock. | |
dc.title | INSTABILITY OF A12SIO5 "TRIPLE-POINT" ASSEMBLAGES IN MUSCOVITE+BIOTITE+QUARTZ-BEARING METAPELITES, WITH IMPLICATIONS | |
dc.type | Статья |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |
This item appears in the following Collection(s)
-
ELibrary
Метаданные публикаций с сайта https://www.elibrary.ru