Experimental Studies on K-Rich Rocks - Origin of Potassium-rich Silica-deficient Igneous Rocks - page 396

Fig. 13.12 a Pressure-
temperature diagram for
phase relation in wolgidite
composition “ H 2 O added ”
experiments. Arrows joining
experimental points indicate
reversal runs. Full lines
represent experimentally
determined boundary curves;
dashed lines: inferred
boundary curves. Arm:
armalcolite, prid: priderite.
For abbreviations see
Table 13.1 b Pressure-
temperature diagram for
phase relation in wolgidite
composition

(a)

”
experiments. (after Arima and
Edgar 1983). Abbreviations
are same as in Table 13.1

“ No H 2 O added

(b)

4.0

3.0

Opx
+
L

2.0

L

?

Ol
+
L

1.0

1100 1200 1300

T o