Table T10 part 2.

Table T10 (continued).

Curatorial data
Breccia
Phenocrysts
Comments

Ig. Unit Core Section Piece Length (cm) Sub Depth (mbsf)
Red/brown clay Green clay Siderite Am silica Fe-oxides Sediment Calcite
Primary mineral Proportion (%) Secondary mineral

14 67 1 1 17
633.10

64

1

Brecciated flow top. Slicks everywhere on all coherent clasts. Matrix (65%) is clasts + black/green clay (98%) and carbonate (2%). Clasts altered to dark brown clay.

2 13
633.27

3 33
633.40

14 67 2 1 139
633.73

64

1

Same as above, with some blue clay.

14 67 3 1 150
635.12

10 3

1

Breccia, clasts altered to clay. Lots of slicks.

14 67 4 1 90
636.62

5

1

0-68 cm: flow top breccia, 5% zeolite, 1% carbonate, remainder clasts + clay.

30

10

68-104 cm: tectonic breccia, highly angular clasts, sheared green clay and ground up clasts (30%), carbonate (10%), rest is clasts.

2 46
637.52

104-141: coherent flow interior. Mesostasis altered to siderite (90%) and carbonate (10%). Some resorbed clasts.

14 67 5 1 24
637.98

Massive flow interior.

2 2
638.22

3 27
638.24

4 13
638.51

5 7
638.64

6 13
638.71

7 7
638.84

8 4
638.91

9 5
638.95

10 8
639.00

11 7
639.08

12 11
639.15

13 2
639.26

14 68 1 1 101
642.60

97 1

2

Volcanic + tectonic breccia. 50% clasts altered to clay. 50% matrix. For interval: 2% carbonate, 0.1% siderite, rest = clast and clay. Clay rich zones are highly sheared and polished. Clasts from red alteration zone below in this interval.

15

2 24
643.61

Clast and matrix altered to clay. Green slicks noted.

3 14
643.85

Clast and matrix altered to clay. Green slicks noted.

15 68 2 1 150
643.99

19 0 0

0

Breccia. 20% matrix = 95% green clay, 2% carbonate, 2% siderite, 1% am si, all recalculated for total section percent. Locally silicified. Some slicks in matrix rich areas. Some tectonic brecciation. Not all primary igneous brecciation.

15 68 3 1 126
645.49

2 5

7

0-40 cm: Tectonic breccia. Numerous hydrothermal carbonate veins. Angular clasts (bottom most clast highly sheared). Clasts broken and rotated. Matrix + vesicles = 7% carbonate, 5% siderite, 2% clay.

10

40-66 cm: Highly altered and sheared glassy volcanic breccia. Clasts = 30%, matrix = 70% (altered to clay). Total interval = 10% siderite. Slicks noted.

66-126: Brecciated in places (down to 98 cm) where there is a sharp contact with vesicular basalt below. Breccias = 20% of interval and are composed of matrix (20%) and clast (80%).

15 68 4 1 145
646.75

Oxidized patches = 30% of rock. Resorbed vesicular clast from 82-100 cm.

16

98
2

This breccia begins at 100 cm in section. Breccia is green and brown clays. 70% matrix yields 2% siderite in interval with the rest = clay. 30% clasts altered to clay. Some slicks.

Volcanic breccia. 60% clasts 40% matrix. In section: 0.5% siderite and 0.1% carbonate, rest = clay + clasts. Clasts are highly oxidized to brick red from 0-43 cm. Rare slicks. Magmatic flow textures in some clasts.

16 68 5 1 17
646.75

1

0

Curatorial data							Breccia							Phenocrysts			Comments
Ig. Unit	Core	Section	Piece	Length (cm)	Sub	Depth (mbsf)	Red/brown clay	Green clay	Siderite	Am silica	Fe-oxides	Sediment	Calcite	Primary mineral	Proportion (%)	Secondary mineral	Comments
14	67	1	1	17		633.10		64					1				Brecciated flow top. Slicks everywhere on all coherent clasts. Matrix (65%) is clasts + black/green clay (98%) and carbonate (2%). Clasts altered to dark brown clay.
			2	13		633.27
			3	33		633.40
14	67	2	1	139		633.73		64					1				Same as above, with some blue clay.
14	67	3	1	150		635.12		10	3				1				Breccia, clasts altered to clay. Lots of slicks.
14	67	4	1	90		636.62			5				1				0-68 cm: flow top breccia, 5% zeolite, 1% carbonate, remainder clasts + clay.
								30					10				68-104 cm: tectonic breccia, highly angular clasts, sheared green clay and ground up clasts (30%), carbonate (10%), rest is clasts.
			2	46		637.52											104-141: coherent flow interior. Mesostasis altered to siderite (90%) and carbonate (10%). Some resorbed clasts.
14	67	5	1	24		637.98											Massive flow interior.
			2	2		638.22
			3	27		638.24
			4	13		638.51
			5	7		638.64
			6	13		638.71
			7	7		638.84
			8	4		638.91
			9	5		638.95
			10	8		639.00
			11	7		639.08
			12	11		639.15
			13	2		639.26
14	68	1	1	101		642.60		97	1				2				Volcanic + tectonic breccia. 50% clasts altered to clay. 50% matrix. For interval: 2% carbonate, 0.1% siderite, rest = clast and clay. Clay rich zones are highly sheared and polished. Clasts from red alteration zone below in this interval.
15			2	24		643.61											Clast and matrix altered to clay. Green slicks noted.
			3	14		643.85											Clast and matrix altered to clay. Green slicks noted.
15	68	2	1	150		643.99		19	0	0			0				Breccia. 20% matrix = 95% green clay, 2% carbonate, 2% siderite, 1% am si, all recalculated for total section percent. Locally silicified. Some slicks in matrix rich areas. Some tectonic brecciation. Not all primary igneous brecciation.
15	68	3	1	126		645.49		2	5				7				0-40 cm: Tectonic breccia. Numerous hydrothermal carbonate veins. Angular clasts (bottom most clast highly sheared). Clasts broken and rotated. Matrix + vesicles = 7% carbonate, 5% siderite, 2% clay.
									10								40-66 cm: Highly altered and sheared glassy volcanic breccia. Clasts = 30%, matrix = 70% (altered to clay). Total interval = 10% siderite. Slicks noted.
																	66-126: Brecciated in places (down to 98 cm) where there is a sharp contact with vesicular basalt below. Breccias = 20% of interval and are composed of matrix (20%) and clast (80%).
15	68	4	1	145		646.75											Oxidized patches = 30% of rock. Resorbed vesicular clast from 82-100 cm.
16							98		2								This breccia begins at 100 cm in section. Breccia is green and brown clays. 70% matrix yields 2% siderite in interval with the rest = clay. 30% clasts altered to clay. Some slicks.
																	Volcanic breccia. 60% clasts 40% matrix. In section: 0.5% siderite and 0.1% carbonate, rest = clay + clasts. Clasts are highly oxidized to brick red from 0-43 cm. Rare slicks. Magmatic flow textures in some clasts.
16	68	5	1	17		646.75			1				0