408 



A TREATISE ON METAMORPHISM. 



Table D. — Classification of alterations, with volume changes — Continued. 

 SILICATION, HYDRATION, AND DECARBONATION. 



Corundum 



Corundum, quartz, calcite. 

 Corundum 



Corundum, quartz, calcite. 

 Corundum 



Corundum, quartz, K 2 C0 3 



Margarite 



do 



Zoisite 



do 



Muscovite (damourite) 

 do 



Volume 

 change. 



Per cent 

 +159. 02 

 - 1.22 

 +261. 34 

 - 23.58 

 +264. 25 

 + 1.62 



SILICATION, OXIDATION, AND DECARBONATION. 



Ilmenite 



Ilrhenite, calcite, quartz . 



Titanite 



Titanite, magnetite . 



+ 76.35 

 - 22.35 



SUBSTITUTION OF BASES. 



Augite 



Augite, siderite, magnesite. 



Calcite 



Diopside 



Diopside, magnesite 



Hornblende 



Leucite 



Muscovite 



Olivine, anorthite 



Sahlite 



Sahlite, siderite, magnesite 

 Spodumene .... 



Hornblende 



Hornblende, calcite 



Dolomite 



Tremolite 



Tremolite, calcite 



Augite 



Orthoclase, nephelite. 



Paragonite 



Actinolite, spinel 



Actinolite 



Actinolite, calcite 



Beta-spodumene 



Hematite . 

 Do... 



Marcasite, siderite. 

 Pyrite, siderite 



+ 4.30 

 + 6.14 



- 12.30 

 + 5.68 

 + 10.55 



- 4.13 



- 7. 59 



- 2.67 



- 7.18 

 + 7.28 

 + 10.81 

 + 24. 72 



+ 78.73 

 + 76.12 



