Table T6. Selected microprobe analyses of clinopyroxene, Hole 735B. (Continued on next page.)

Table T6. Selected microprobe analyses of clinopyroxene, Hole 735B.

Core, section,
interval (cm):
101R-1 (Piece 7, 106-108) 112R-2 (Piece 1, 64-66) 130R-3 (Piece 11, 93-95) 156R-3 (Piece 5, 5154)

Lithology:
Olivine gabbro Olivine gabbro Olivine gabbro Olivine gabbro

Texture:

M

M

M

V

V

V

M

M

M

V

V

V

If

If

If

M

M

M

M

M

M

If

If

If

V

V

V

SiO₂ 52.59 52.06 52.43 53.11 53.05 53.38 52.31 52.10 52.02 52.19 52.68 53.02 52.63 53.03 51.97 51.79 52.20 53.04 51.89 51.52 52.19 51.96 52.35 52.36 53.43 52.97 52.31

TiO₂ 0.57 0.69 0.58 0.25 0.22 0.21 0.67 0.84 0.66 0.64 0.46 0.42 0.64 0.53 0.80 0.98 0.65 0.43 0.64 0.68 0.64 0.69 0.60 0.71 0.27 0.31 0.54

Al2O₃ 2.96 2.95 3.00 1.45 0.85 0.74 3.14 2.62 3.31 2.12 1.67 1.54 1.96 1.62 2.70 2.69 2.28 1.62 2.69 2.91 2.46 2.48 2.00 2.27 0.85 1.57 2.29

FeO* 8.12 7.30 6.12 6.94 9.11 8.65 6.46 7.48 6.14 8.46 8.17 8.50 8.37 8.37 7.82 8.97 8.49 8.94 7.02 7.22 7.23 7.04 7.17 7.93 6.92 6.32 6.46

MnO 0.25 0.24 0.18 0.28 0.36 0.34 0.18 0.23 0.17 0.27 0.33 0.31 0.26 0.28 0.25 0.31 0.29 0.33 0.23 0.25 0.21 0.23 0.21 0.23 0.29 0.24 0.21

MgO 17.16 16.75 16.02 14.94 14.42 14.47 16.65 15.07 15.34 14.25 14.43 14.55 14.45 14.57 14.52 14.07 14.59 14.35 14.99 15.03 15.03 15.17 15.35 15.69 15.07 14.95 15.52

CaO 17.70 19.04 21.05 21.67 20.60 21.15 20.34 21.46 21.90 21.53 22.01 21.42 21.75 21.76 21.65 20.61 21.31 21.26 21.72 21.01 22.11 21.78 21.71 20.63 22.65 22.88 22.03

Na₂O 0.52 0.42 0.40 0.47 0.41 0.36 0.39 0.37 0.45 0.41 0.36 0.45 0.33 0.37 0.38 0.58 0.35 0.48 0.39 0.52 0.44 0.42 0.37 0.39 0.47 0.44 0.58

K₂O 0.00 0.00 0.00 0.01 0.00 0.00 0.00 0.02 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.01

Cr₂O₃ 0.07 0.07 0.10 0.06 0.03 0.03 0.06 0.01 0.09 0.02 0.00 0.00 0.02 0.01 0.04 0.00 0.00 0.01 0.03 0.03 0.03 0.02 0.01 0.01 0.02 0.03 0.02

NiO 0.05 0.00 0.04 0.00 0.02 0.00 0.01 0.00 0.00 0.01 0.03 0.00 0.00 0.03 0.05 0.00 0.01 0.00 0.00 0.00 0.03 0.01 0.00 0.00 0.00 0.00 0.00

Total 99.98 99.51 99.92 99.17 99.08 99.33 100.21 100.20 100.07 99.89 100.13 100.21 100.40 100.58 100.19 100.01 100.18 100.44 99.59 99.18 100.37 99.80 99.78 100.20 99.96 99.71 99.96

Cations (O = 6):

Si 1.931 1.922 1.927 1.977 1.991 1.995 1.916 1.925 1.914 1.944 1.956 1.966 1.948 1.959 1.925 1.928 1.937 1.965 1.927 1.921 1.927 1.927 1.941 1.933 1.979 1.963 1.933

Ti 0.016 0.019 0.016 0.007 0.006 0.006 0.018 0.023 0.018 0.018 0.013 0.012 0.018 0.015 0.022 0.028 0.018 0.012 0.018 0.019 0.018 0.019 0.017 0.020 0.007 0.009 0.015

Al 0.128 0.128 0.130 0.064 0.038 0.033 0.136 0.114 0.144 0.093 0.073 0.067 0.085 0.070 0.118 0.118 0.100 0.071 0.118 0.128 0.107 0.108 0.087 0.099 0.037 0.069 0.100

Fe 0.249 0.225 0.188 0.216 0.286 0.270 0.198 0.231 0.189 0.264 0.254 0.264 0.259 0.259 0.242 0.279 0.263 0.277 0.218 0.225 0.223 0.218 0.222 0.245 0.214 0.196 0.200

Mn 0.008 0.007 0.006 0.009 0.011 0.011 0.006 0.007 0.005 0.008 0.010 0.010 0.008 0.009 0.008 0.010 0.009 0.010 0.007 0.008 0.007 0.007 0.007 0.007 0.009 0.008 0.007

Mg 0.939 0.922 0.878 0.829 0.807 0.806 0.909 0.830 0.842 0.791 0.799 0.804 0.798 0.802 0.802 0.780 0.807 0.792 0.830 0.835 0.827 0.839 0.849 0.864 0.832 0.826 0.855

Ca 0.696 0.753 0.829 0.864 0.828 0.847 0.798 0.850 0.864 0.859 0.876 0.851 0.863 0.861 0.859 0.822 0.847 0.844 0.864 0.839 0.875 0.865 0.862 0.816 0.899 0.908 0.872

Na 0.037 0.030 0.029 0.034 0.030 0.026 0.028 0.026 0.032 0.029 0.026 0.032 0.023 0.026 0.027 0.042 0.025 0.034 0.028 0.038 0.031 0.030 0.026 0.028 0.034 0.031 0.041

K 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Cr 0.002 0.002 0.003 0.002 0.001 0.001 0.002 0.000 0.003 0.001 0.000 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.001 0.001 0.001 0.001 0.000 0.000 0.000 0.001 0.001

Ni 0.002 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000

Total 4.007 4.009 4.005 4.001 3.998 3.995 4.011 4.008 4.010 4.006 4.007 4.005 4.003 4.004 4.007 4.007 4.007 4.005 4.010 4.014 4.017 4.015 4.012 4.011 4.012 4.010 4.023

Mg# 79.03 80.34 82.36 79.33 73.83 74.89 82.13 78.21 81.67 75.00 75.89 75.32 75.48 75.62 76.81 73.65 75.39 74.11 79.18 78.77 78.74 79.36 79.23 77.91 79.51 80.83 81.08

Wo 36.9 39.6 43.8 45.3 43.1 44.0 41.9 44.5 45.6 44.9 45.4 44.3 44.9 44.8 45.1 43.7 44.2 44.10 45.2 44.2 45.4 45.0 44.6 42.4 46.2 47.1 45.3

En 49.8 48.5 46.3 43.4 42.0 41.9 47.7 43.4 44.4 41.3 41.4 41.9 41.6 41.7 42.1 41.5 42.1 41.42 43.4 44.0 43.0 43.6 43.9 44.9 42.8 42.8 44.4

Fs 13.2 11.9 9.9 11.3 14.9 14.1 10.4 12.1 10.0 13.8 13.2 13.7 13.5 13.5 12.7 14.8 13.7 14.47 11.4 11.9 11.6 11.4 11.5 12.7 11.0 10.1 10.4

Core, section, interval (cm):	101R-1 (Piece 7, 106-108)	112R-2 (Piece 1, 64-66)	130R-3 (Piece 11, 93-95)	156R-3 (Piece 5, 5154)
Lithology:	Olivine gabbro	Olivine gabbro	Olivine gabbro	Olivine gabbro
Texture:	M	M	M	V	V	V	M	M	M	V	V	V	If	If	If	M	M	M	M	M	M	If	If	If	V	V	V
SiO₂	52.59	52.06	52.43	53.11	53.05	53.38	52.31	52.10	52.02	52.19	52.68	53.02	52.63	53.03	51.97	51.79	52.20	53.04	51.89	51.52	52.19	51.96	52.35	52.36	53.43	52.97	52.31
TiO₂	0.57	0.69	0.58	0.25	0.22	0.21	0.67	0.84	0.66	0.64	0.46	0.42	0.64	0.53	0.80	0.98	0.65	0.43	0.64	0.68	0.64	0.69	0.60	0.71	0.27	0.31	0.54
Al2O₃	2.96	2.95	3.00	1.45	0.85	0.74	3.14	2.62	3.31	2.12	1.67	1.54	1.96	1.62	2.70	2.69	2.28	1.62	2.69	2.91	2.46	2.48	2.00	2.27	0.85	1.57	2.29
FeO*	8.12	7.30	6.12	6.94	9.11	8.65	6.46	7.48	6.14	8.46	8.17	8.50	8.37	8.37	7.82	8.97	8.49	8.94	7.02	7.22	7.23	7.04	7.17	7.93	6.92	6.32	6.46
MnO	0.25	0.24	0.18	0.28	0.36	0.34	0.18	0.23	0.17	0.27	0.33	0.31	0.26	0.28	0.25	0.31	0.29	0.33	0.23	0.25	0.21	0.23	0.21	0.23	0.29	0.24	0.21
MgO	17.16	16.75	16.02	14.94	14.42	14.47	16.65	15.07	15.34	14.25	14.43	14.55	14.45	14.57	14.52	14.07	14.59	14.35	14.99	15.03	15.03	15.17	15.35	15.69	15.07	14.95	15.52
CaO	17.70	19.04	21.05	21.67	20.60	21.15	20.34	21.46	21.90	21.53	22.01	21.42	21.75	21.76	21.65	20.61	21.31	21.26	21.72	21.01	22.11	21.78	21.71	20.63	22.65	22.88	22.03
Na₂O	0.52	0.42	0.40	0.47	0.41	0.36	0.39	0.37	0.45	0.41	0.36	0.45	0.33	0.37	0.38	0.58	0.35	0.48	0.39	0.52	0.44	0.42	0.37	0.39	0.47	0.44	0.58
K₂O	0.00	0.00	0.00	0.01	0.00	0.00	0.00	0.02	0.00	0.00	0.00	0.00	0.00	0.01	0.01	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.01	0.00	0.01
Cr₂O₃	0.07	0.07	0.10	0.06	0.03	0.03	0.06	0.01	0.09	0.02	0.00	0.00	0.02	0.01	0.04	0.00	0.00	0.01	0.03	0.03	0.03	0.02	0.01	0.01	0.02	0.03	0.02
NiO	0.05	0.00	0.04	0.00	0.02	0.00	0.01	0.00	0.00	0.01	0.03	0.00	0.00	0.03	0.05	0.00	0.01	0.00	0.00	0.00	0.03	0.01	0.00	0.00	0.00	0.00	0.00
Total	99.98	99.51	99.92	99.17	99.08	99.33	100.21	100.20	100.07	99.89	100.13	100.21	100.40	100.58	100.19	100.01	100.18	100.44	99.59	99.18	100.37	99.80	99.78	100.20	99.96	99.71	99.96
Cations (O = 6):
Si	1.931	1.922	1.927	1.977	1.991	1.995	1.916	1.925	1.914	1.944	1.956	1.966	1.948	1.959	1.925	1.928	1.937	1.965	1.927	1.921	1.927	1.927	1.941	1.933	1.979	1.963	1.933
Ti	0.016	0.019	0.016	0.007	0.006	0.006	0.018	0.023	0.018	0.018	0.013	0.012	0.018	0.015	0.022	0.028	0.018	0.012	0.018	0.019	0.018	0.019	0.017	0.020	0.007	0.009	0.015
Al	0.128	0.128	0.130	0.064	0.038	0.033	0.136	0.114	0.144	0.093	0.073	0.067	0.085	0.070	0.118	0.118	0.100	0.071	0.118	0.128	0.107	0.108	0.087	0.099	0.037	0.069	0.100
Fe	0.249	0.225	0.188	0.216	0.286	0.270	0.198	0.231	0.189	0.264	0.254	0.264	0.259	0.259	0.242	0.279	0.263	0.277	0.218	0.225	0.223	0.218	0.222	0.245	0.214	0.196	0.200
Mn	0.008	0.007	0.006	0.009	0.011	0.011	0.006	0.007	0.005	0.008	0.010	0.010	0.008	0.009	0.008	0.010	0.009	0.010	0.007	0.008	0.007	0.007	0.007	0.007	0.009	0.008	0.007
Mg	0.939	0.922	0.878	0.829	0.807	0.806	0.909	0.830	0.842	0.791	0.799	0.804	0.798	0.802	0.802	0.780	0.807	0.792	0.830	0.835	0.827	0.839	0.849	0.864	0.832	0.826	0.855
Ca	0.696	0.753	0.829	0.864	0.828	0.847	0.798	0.850	0.864	0.859	0.876	0.851	0.863	0.861	0.859	0.822	0.847	0.844	0.864	0.839	0.875	0.865	0.862	0.816	0.899	0.908	0.872
Na	0.037	0.030	0.029	0.034	0.030	0.026	0.028	0.026	0.032	0.029	0.026	0.032	0.023	0.026	0.027	0.042	0.025	0.034	0.028	0.038	0.031	0.030	0.026	0.028	0.034	0.031	0.041
K	0.000	0.000	0.000	0.001	0.000	0.000	0.000	0.001	0.000	0.000	0.000	0.000	0.000	0.000	0.001	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000
Cr	0.002	0.002	0.003	0.002	0.001	0.001	0.002	0.000	0.003	0.001	0.000	0.000	0.001	0.000	0.001	0.000	0.000	0.000	0.001	0.001	0.001	0.001	0.000	0.000	0.000	0.001	0.001
Ni	0.002	0.000	0.001	0.000	0.001	0.000	0.000	0.000	0.000	0.000	0.001	0.000	0.000	0.001	0.001	0.000	0.000	0.000	0.000	0.000	0.001	0.000	0.000	0.000	0.000	0.000	0.000
Total	4.007	4.009	4.005	4.001	3.998	3.995	4.011	4.008	4.010	4.006	4.007	4.005	4.003	4.004	4.007	4.007	4.007	4.005	4.010	4.014	4.017	4.015	4.012	4.011	4.012	4.010	4.023

Mg#	79.03	80.34	82.36	79.33	73.83	74.89	82.13	78.21	81.67	75.00	75.89	75.32	75.48	75.62	76.81	73.65	75.39	74.11	79.18	78.77	78.74	79.36	79.23	77.91	79.51	80.83	81.08
Wo	36.9	39.6	43.8	45.3	43.1	44.0	41.9	44.5	45.6	44.9	45.4	44.3	44.9	44.8	45.1	43.7	44.2	44.10	45.2	44.2	45.4	45.0	44.6	42.4	46.2	47.1	45.3
En	49.8	48.5	46.3	43.4	42.0	41.9	47.7	43.4	44.4	41.3	41.4	41.9	41.6	41.7	42.1	41.5	42.1	41.42	43.4	44.0	43.0	43.6	43.9	44.9	42.8	42.8	44.4
Fs	13.2	11.9	9.9	11.3	14.9	14.1	10.4	12.1	10.0	13.8	13.2	13.7	13.5	13.5	12.7	14.8	13.7	14.47	11.4	11.9	11.6	11.4	11.5	12.7	11.0	10.1	10.4

Notes: M = magmatic, V = near vein. If = interfingering part. FeO* = total iron as FeO. Mg# = 100 x Mg/(Mg + Fe), Wo = 100 x Ca/(Ca + Mg + Fe), En = 100 x Mg/(Ca + Mg + Fe), Fs = 100 x Fe/(Ca + Mg + Fe).