Table 3 Representative electron-beam microprobe analyses of feldspar

Diamond Drill Core (DDH) Samples

Plagioclase feldspar

DDH No.	302	319	319	331	340	342	342	344	351	356	356	407	458	459
Depth m.	69	314.7	319.3	218.5	166.1	84.5	141	16	313.2	166.5	190	257.8	151.8	102.9
Analyses		34	21	62	24	84	10	44	20	8	6	7	71	31
SiO2		67.76	58.09	54.43	56.57	57.11	56.11	56.92	57.63	61.00	59.79	63.48	60.60	58.59
Al2O3		20.09	25.97	27.45	27.05	26.32	26.93	26.65	23.70	24.58	25.26	21.97	24.46	24.35
FeO		0.13	0.29	0.40	0.02	0.03	0.41	0.35	0.07	0.38	0.46	0.25	0.26	0.36
MgO		0.00	0.01	0.19	0.01	0.01	0.02	0.02	1.36	0.00	0.00	0.01	0.01	0.01
CaO		0.48	7.54	10.30	8.99	8.13	9.18	8.47	9.37	6.07	6.80	2.87	5.81	6.59
Na2O		10.94	6.90	5.39	5.94	6.34	5.73	6.07	6.09	7.63	7.12	9.27	7.66	7.20
K2O		0.36	0.31	0.29	0.45	0.58	0.42	0.77	0.31	0.40	0.38	0.60	0.53	0.53
SrO		0.00	0.00	0.00	0.00	0.00	0.00		0.00	0.01	0.00	0.00	0.00	0.00
BaO		0.01	0.05	0.04	0.03	0.06	0.03	0.09	0.03	0.04	0.02	0.07	0.05	0.02
Total		99.77	99.16	98.50	99.07	98.58	98.84	99.34	98.57	100.09	99.81	98.51	99.39	97.67
Ab		95.6	61.3	47.9	53.0	56.5	51.7	53.9	54.1	67.8	64.0	82.4	68.3	64.7
Or		2.1	1.8	1.7	2.7	3.4	2.5	4.6	1.8	2.3	2.3	3.5	3.1	3.1
An		2.3	37.0	50.4	44.3	40.1	45.8	41.5	44.1	29.9	33.8	14.1	28.6	32.2

Potassium feldspar

DDH No.	302	319	319	331	340	342	342	344	351	356	356	407	458	459
Depth m.	69	314.7	319.3	218.5	166.1	84.5	141	16	313.2	166.5	190	257.8	151.8	102.9
Analyses	18	13	1	4	5	8	2	8	7	4	1	10	3	14
SiO2	65.10	64.70	62.76	62.59	63.83	62.51	63.38	63.24	64.13	65.31	61.73	62.98	66.59	63.96
Al2O3	18.94	18.99	20.04	19.48	18.92	19.34	18.51	19.52	19.10	18.84	18.42	19.29	18.56	18.79
FeO	0.08	0.07	0.26	0.18	0.02	0.02	0.14	0.21	0.02	0.20	4.14	0.15	0.18	0.12
MgO	0.00	0.00	0.00	0.01	0.01	0.01	0.00	0.01	0.00	0.00	0.04	0.00	0.01	0.00
CaO	0.04	0.06	0.85	0.34	0.24	0.51	0.07	0.28	0.17	0.10	0.51	0.18	0.52	0.09
Na2O	2.32	2.43	2.08	2.79	1.86	2.91	1.07	3.69	2.21	2.40	3.28	3.15	3.61	1.92
K2O	13.49	13.22	12.49	11.46	13.73	11.70	14.83	10.39	13.18	13.22	10.62	11.38	10.16	13.87
SrO	0.00	0.00	0.00	0.00	0.00	0.00	0.00		0.00	0.00	0.00	0.00	0.00	0.00
BaO	0.18	0.25	1.17	1.89	0.40	0.74	0.19	1.16	0.39	0.11	0.11	1.22	0.13	0.38
Total	100.15	99.72	99.65	98.72	99.01	97.73	98.18	98.48	99.21	100.18	98.85	98.35	99.76	99.13
Ab	20.68	21.72	19.32	26.51	16.84	26.67	9.85	34.68	20.16	21.57	31.12	29.67	34.28	17.28
Or	79.11	77.99	76.34	71.69	81.92	70.72	89.80	63.90	78.96	77.94	66.23	69.36	62.96	82.29
An	0.22	0.28	4.34	1.80	1.23	2.61	0.36	1.43	0.88	0.49	2.65	0.98	2.76	0.44

Grab Samples

Plagioclase feldspar

Sample	JDD-94-03	JDD-94-04	JDD-94-05	JDD-94-07	JDD-94-11	JDD-94-12	JDD-94-14
Analyses	12	7	23	31	18	7	6
SiO2	66.94	65.53	66.03	66.76	66.50	58.79	63.43
Al2O3	20.33	19.49	20.82	20.08	20.31	25.22	22.49
FeO	0.10	0.47	0.06	0.10	0.04	0.25	0.18
MgO	0.00	0.00	0.00	0.01	0.01	0.01	0.01
CaO	0.69	0.40	1.28	0.67	1.12	7.41	3.33
Na2O	10.74	10.53	9.96	10.56	10.26	6.56	9.13
K2O	0.36	0.31	0.98	0.32	0.33	0.40	0.39
SrO	0.00	0.00	0.00	0.00	0.00	0.00	0.00
BaO	0.01	0.00	0.01	0.01	0.01	0.02	0.01
Total	99.18	96.74	99.14	98.50	98.59	98.66	98.97
Ab	94.55	96.11	88.01	94.82	92.46	60.26	81.37
Or	2.08	1.83	5.75	1.89	1.97	2.41	2.27
An	3.36	2.07	6.24	3.30	5.57	37.33	16.37

Potassium feldspar

Sample	JDD-94-03	JDD-94-04	JDD-94-05	JDD-94-07	JDD-94-11	JDD-94-12	JDD-94-14
Analyses	1	5	3	3	1		10
SiO2	64.56	62.71	64.52	63.80	63.63		63.67
Al2O3	18.89	18.39	19.33	18.41	18.60		18.73
FeO	0.06	0.45	0.06	0.11	0.01		0.17
MgO	0.00	0.01	0.01	0.01	0.00		0.00
CaO	0.00	0.03	0.30	0.02	0.00		0.02
Na2O	2.24	2.31	2.71	1.61	1.12		1.77
K2O	13.76	12.91	12.56	14.23	15.17		14.05
SrO	0.00	0.00	0.00	0.00	0.00		0.00
BaO	0.03	0.35	0.16	0.09	0.13		0.33
Total	99.54	97.15	99.64	98.28	98.66		98.73
Ab	19.82	21.35	24.49	14.65	10.12		16.01
Or	80.18	78.49	74.02	85.25	89.88		83.88
An	0.00	0.16	1.49	0.10	0.00		0.11