Depth to Benioff zone, km	% K2O
81.92	1.077
90.45	0.704
91.31	1.003
92.16	1.291
94.72	0.8
101.55	0.779
101.55	0.843
107.52	1.9
110.93	1.205
115.2	1.397
116.05	2.005
121.17	0.704
122.03	0.896
122.03	1.205
131.41	1.003
131.41	1.301
135.68	1.707
136.53	1.291
136.53	1.6
140.8	1.707
142.51	1.44
148.48	2.101
151.89	2.283
151.89	1.846
151.89	1.792
162.99	2.507
183.47	2.507
188.59	2.091
212.48	1.952
212.48	2.091
243.2	2.507
244.91	3.893
262.83	2.645
271.36	2.699
280.75	2.496