Table T2. X-ray diffraction (XRD) data for rock pieces and silty clay samples from bulk powder mounts, Site 1200. (See table note. Continued on next page.)

Table T2. X-ray diffraction (XRD) data for rock pieces and silty clay samples from bulk powder mounts, Site 1200.


Core, section, interval (cm)	Depth (mbsf)	Lithology	Mineral
Core, section, interval (cm)	Depth (mbsf)	Lithology	Serpentine	Brucite	Calcite	Aragonite	Opal-CT	Analcime(?)	Forsterite	Orthopyroxene	Clinopyroxene	Amphibole	Chlorite	Talc	Mixed-layer clay	Halite
195-1200A-
1R-1, 0-1	0.00	Carbonate chimney			D	A										P
3R-1, 9-10	18.29	Fine-grained ultramafic	D	D						P
3R-1, 81-84	19.01	Fine-grained ultramafic	D	D						C	P
6R-1, 33-34	41.73	Serpentine vein	D	D
6R-2, 40-41	43.06	Harzburgite with serpentine vein	D	A					P
7R-2, 72-73	52.41	Harzburgite	D	A					A	A	C
9R-1, 30-31	70.70	Serpentine mud	D	C								P	P	P		C
9R-1, 54-55	70.94	Serpentine mud	D	C								P		P		P
9R-1, 75-76	71.15	Serpentine mud	D	C								P		P		C
10R-1, 93-93	80.83	Fine-grained ultramafic	D	A						C	P
11R-1, 7-8	89.47	Fine-grained ultramafic with SiO₂ veins	C	C			D								C
11R-1, 21-22	89.61	Fine-grained ultramafic with SiO₂ veins	C	D			A
11R-1, 45-46	89.85	Fine-grained ultramafic	D	A						P
11R-1, 66-67	90.06	Harzburgite	D	A					C	C	P
13R-1, 1-2	108.71	Serpentine mud	D	C								P		P		P
13R-1, 25-26	108.95	Fine-grained ultramafic	D	A						C
13R-2, 4-5	109.99	Pure fibrous chrysotile	D
15R-1, 1-2	127.91	Serpentine mud	D	C								C		P		C
15R-CC, 1-2	128.44	Serpentine mud	D	A								P
16R-2, 47-48	139.42	Fine-grained ultramafic	D	A						P
17G-2, 29-30		Serpentine vein	D	A						A
195-1200B-
2H-1, 124-126	31.94	Greenschist									D		A
2H-2, 2-6	32.22	Fine-grained ultramafic	D	D
195-1200D-
1H-1, 0-1	0.00	Carbonate mud			D
1H-1, 10-11	0.10	Oxidized mud	A		C	A						P		P		C
1H-1, 20-21	0.20	Light bluish mud	D		C	C						P				C
1H-1, 50-51	0.50	Bluish gray mud	D		P	A							P			P
1H-1, 77-78	0.77	Bluish gray mud	D		P	A						C	P			P
1H-1, 100-101	1.00	Black mud	D			A		C								P
1H-3, 40-41	3.40	Bluish gray mud	A	D								C		P		P
1H-3, 99-100	3.99	Brown streaky flakes in mud	D
1H-4, 63-64	5.13	Bluish gray mud	D	P												P
1H-CC, 30-31	6.70	Altered clast, greenish	D	D
2H-1, 60-61	7.50	Bluish gray mud	A	A				P								P
2H-2, 11-12	8.51	Dark mottled mud	D	A								P	P	P		P
2H-2, 40-41	8.80	Bluish gray mud	D	A
3H-1, 55-56	10.45	Altered clast, light green	D	A
3H-1, 60-61	10.50	Altered clast, dark green	D	P
3H-1, 110-111	11.00	Bluish gray mud	A	D
3H-CC, 10-11	12.22	Bluish gray mud	D	A												P
6H-1, 9-10	21.59	Bluish gray mud	D	A								C	P	P		P
6H-CC, 23-24	23.42	Bluish gray mud	D	A								P		P		P
7H-1, 56-57	24.06	Bluish gray mud	D	A								P				P
8H-1, 20-21	25.20	Bluish gray mud	D	A								P		P		P
8H-2, 49-50	26.99	Bluish gray mud	D	C								P				P
9H-1, 49-50	28.49	Bluish gray mud	D	A								P				P
9H-CC, 0-1	29.10	Fine sand fraction	D	A								P
195-1200E-
1H-1, 14-15	0.14	Oxidized mud	A			D						P	P			C
1H-1, 109-110	1.09	Black mud	A	C		D		P				P		P		P
1H-3, 29-30	3.29	Black mud	D	A				P				P	P	P		P
1H-4, 99-100	5.49	Black mud	D	A				P				P		P		P
2H-2, 29-30	7.89	Black mud	D	A				P				C	P	P		P
2H-3, 109-110	10.19	Black mud	D	C								C	P	C		P
3H-1, 74-75	11.74	Contorted greenish mud	A		A	A						P				P
4H-1, 57-58	12.57	Black mud	A	A	P			P				C	P	P		P
4H-3, 70-71	15.70	Black mud	A	P	C	A		P				P	P	P		P
5H-1, 130-131	18.90	Dark bluish mud	D	A				P				P	P	P		P
6H-1, 99-100	22.19	Dark bluish mud	D	A				P				P				P
6H-3, 114-115	25.28	Dark bluish mud	D	A				P				P	P			P
7H-2, 99-100	28.39	Bluish gray mud	D	A								P				P
7H-5, 18-19	32.08	Bluish gray mud	D	A												P
10H-1, 19-20	52.59	Bluish gray mud	D	C								C	P	P		P
10H-3, 40-41	55.80	Bluish gray mud	D	C								P	P	P		P
195-1200F-
1H-1, 39-40	0.39	Black mud	A	P	P	D						P				P
1H-3, 40-41	3.40	Black mud	D	A				P				P	P	P		P
1H-5, 59-60	6.59	Black mud	D	A				P				P	P	P		P
2H-2, 50-51	9.70	Black mud	D	C				P				C	P	P		P
2H-4, 70-71	12.40	Black mud	D	C				P				C	P	P		P
3H-2, 104-105	15.44	Black mud	D	A				P				P	P	P		P

Note: Semiquantitative estimation of mineral abundance is based on major XRD peak intensities displayed by the various minerals: D = dominant (50%-100%), A = abundant (20%-50%), C = common (5%-20%), P = present (1%-5%).