1. Age and origin of early Proterozoic dolerite dykes in South-West Greenland

   • Feiko Kalsbeek
   • Paul N. Taylor

   OriginalPaper Pages: 307 - 316

2. Chemical differences between minerals from mineralizing and barren intrusions from some North American porphyry copper deposits

   • D. A. F. Hendry
   • A. R. Chivas
   • S. J. B. Reed

   OriginalPaper Pages: 317 - 329

3. Mafic potassic lavas of the Quaternary West Eifel volcanic field

   • H. Mertes
   • H. -U. Schmincke

   OriginalPaper Pages: 330 - 345

4. Experimental study of subsolidus phase relations and mixing properties of pyroxene and plagioclase in the system Na₂O-CaO-Al₂O₃-SiO₂

   • Tibor Gasparik

   OriginalPaper Pages: 346 - 357

5. Activity variations attending tungsten skarn formation, Pine Creek, California

   • Philip E. Brown
   • Eric J. Essene

   OriginalPaper Pages: 358 - 369

6. Energetics of hydration of cordierite and water barometry in cordierite-granulites

   • A. Bhattacharya
   • S. K. Sen

   OriginalPaper Pages: 370 - 378

7. Manganiferous pyroxenes and pyroxenoids from three Pb-Zn-Cu skarn deposits

   • Jürgen Abrecht

   OriginalPaper Pages: 379 - 393

8. Geochemistry of phonolites and trachytes from the summit region of Mt. Kenya

   • R. C. Price
   • R. W. Johnson
   • F. A. Frey

   OriginalPaper Pages: 394 - 409

9. Anouncements

   Announcement Pages: 410 - 410