Table T1. Isotopic data for vein minerals.

Table T1. Isotopic data for vein minerals.

Core, section, interval (cm)

Piece

Depth (mbsf)

Mineralogy

¹⁸O (SMOW)

¹³C (PDB)

⁸⁷Sr/⁸⁶Sr

2

Sr
(ppm)

2

Rb
(ppm)

2

⁸⁷Sr/⁸⁶Sr*

176-735B-

107R-1, 81-86 3B 620.31 Chlorite/smectite 19.9 0.704921 8 32.23 0.01 1.22 0.32 0.704904

118R-1, 8-14 4 690.88 Smectite 18.3 0.703341 9 42.09 0.03 0.95 0.22 0.703331

133R-7, 107-111 1F 832.33 Chlorite (+ smectite) 11.1 0.703610 9 30.24 0.02 0.48 0.18 0.703603

172R-7, 132-137 4B 1178.13 Chlorite + c/s 9.7 0.705427 8 18.65 0.01 0.73 0.20 0.705409

181R-2, 7-13 1B 1241.70 Mg montmorillonite 13.2 0.703376 9 27.69 0.02 0.61 0.19 0.703366

197R-2, 34-40 5B 1385.14 Chlorite + c/s 11.7 0.703120 8 46.82 0.02 1.12 0.34 0.703109

202R-2, 135-141 6B 1423.94 Chlorite (+ c/s) 7.1 0.703142 9 48.68 0.03 1.34 0.27 0.703129

207R-5, 53-57 5 1474.90 Chlorite/smectite 11.6 0.703226 8 105 0.2 0.26 0.06 0.703225

90R-8, 8-104 517.07 Aragonite? 32.6 3.2 0.708882 7 3204 70

93R-1, 1-86 532.81 Calcite 32.4 3.1 0.708913 9 260.4 0.2

96R-1, 1-36 549.13 Calcite 31.1 0.3 0.708652 9 149.7 0.1

99R-1, 1-113 567.24 Calcite 31.9 2.7 0.708708 7 249.2 0.1

102R-3, 3-1 593.39 Calcite 31.4 2.8 0.708889 9 282.2 0.1

103R-4, 4-72 602.11 Calcite 31.2 -0.4 0.705495 9 23.25 0.01

107R-1, 81-86 620.31 Calcite 32.0 2.7

116R-3, 3-39 674.85 Calcite 31.2 -2.7 0.706881 10

Core, section, interval (cm)	Piece	Depth (mbsf)	Mineralogy	¹⁸O (SMOW)	¹³C (PDB)	⁸⁷Sr/⁸⁶Sr	2	Sr (ppm)	2	Rb (ppm)	2	⁸⁷Sr/⁸⁶Sr*
176-735B-
107R-1, 81-86	3B	620.31	Chlorite/smectite	19.9		0.704921	8	32.23	0.01	1.22	0.32	0.704904
118R-1, 8-14	4	690.88	Smectite	18.3		0.703341	9	42.09	0.03	0.95	0.22	0.703331
133R-7, 107-111	1F	832.33	Chlorite (+ smectite)	11.1		0.703610	9	30.24	0.02	0.48	0.18	0.703603
172R-7, 132-137	4B	1178.13	Chlorite + c/s	9.7		0.705427	8	18.65	0.01	0.73	0.20	0.705409
181R-2, 7-13	1B	1241.70	Mg montmorillonite	13.2		0.703376	9	27.69	0.02	0.61	0.19	0.703366
197R-2, 34-40	5B	1385.14	Chlorite + c/s	11.7		0.703120	8	46.82	0.02	1.12	0.34	0.703109
202R-2, 135-141	6B	1423.94	Chlorite (+ c/s)	7.1		0.703142	9	48.68	0.03	1.34	0.27	0.703129
207R-5, 53-57	5	1474.90	Chlorite/smectite	11.6		0.703226	8	105	0.2	0.26	0.06	0.703225

90R-8, 8-104		517.07	Aragonite?	32.6	3.2	0.708882	7	3204	70
93R-1, 1-86		532.81	Calcite	32.4	3.1	0.708913	9	260.4	0.2
96R-1, 1-36		549.13	Calcite	31.1	0.3	0.708652	9	149.7	0.1
99R-1, 1-113		567.24	Calcite	31.9	2.7	0.708708	7	249.2	0.1
102R-3, 3-1		593.39	Calcite	31.4	2.8	0.708889	9	282.2	0.1
103R-4, 4-72		602.11	Calcite	31.2	-0.4	0.705495	9	23.25	0.01
107R-1, 81-86		620.31	Calcite	32.0	2.7
116R-3, 3-39		674.85	Calcite	31.2	-2.7	0.706881	10

Notes: * = age corrected, assuming T = 11.5 Ma. c/s = chlorite/smectite. Minor mineral phases are in parentheses. SMOW = standard mean ocean water, PDB = Peedee belemnite.