Origin and transport of pore fluids in the Nankai accretionary prism inferred from chemical and isotopic compositions of pore water at cold seep sites off Kumano

Toki, Tomohiro; Higa, Ryosaku; Ijiri, Akira; Tsunogai, Urumu; Ashi, Juichiro

doi:10.1186/s40623-014-0137-3

Earth, Planets and Space

Table 3 Chemical and isotopic compositions of pore water and bottoms SW

From: Origin and transport of pore fluids in the Nankai accretionary prism inferred from chemical and isotopic compositions of pore water at cold seep sites off Kumano

Dive	Sample	Number	Depth cm bsf	Cl⁻mmol/kg	Na mmol/kg	Mg mmol/kg	SO₄²⁻mmol/kg	K mmol/kg	Ca mmol/kg	Bμmol/kg	Siμmol/kg	Srμmol/kg	Liμmol/kg	NH₄⁺μmol/kg	Baμmol/kg	CH₄/C₂H₆	δ¹³C_∑CO2‰ VPDB	δ¹³C_CH4‰ VPDB	δ¹³C_C2H6‰ VPDB	δ¹⁸O_H2O‰ VSMOW	δD_H2O‰ VSMOW
949	C1	0	0	543	470	53.6	28.8	10.3	10.4	422	139	92.9	25.5	5
		2	5	533	463	49.0	21.5	11.0	7.0	666	303	81.7	26.0	91			−31.4	−73.6
		3	10	528	466	48.6	21.5	11.7	6.9	710	316	82.8	29.6	91			−30.7	−74.0
		4	14		474	50.6	23.6	11.7	8.0	655	287	85.8	27.5	68			−29.4	−78.5
		5	19	541	462	48.8	32.2	11.4	7.3	659	270	84.2	29.0	75			−28.6	−77.4
		6	23		497	53.4	23.7	12.0	7.9	659	231	91.0	27.4	59			−28.3	−78.6
	C3	0	0	534	481	54.2	28.1	10.7	10.6	438	164	95.0	26.2	11	0.3					+0.16	+1.1
		1	5	515	44	42.3	10.9	10.3	5.8	951	585	73.7	23.2	141	0.7	9,490	−34.1	−94.5	−52.1	−0.21	−4.9
		2	10	505	436	39.1	4.6	9.7	2.9	1,193	431	67.4	23.2	153	1.1	12,300	−36.4	−93.3	−47.5	−0.40	−3.5
		3	14	498	432	38.6	3.6	9.8	2.7	1,218	487	67.7	24.0	135	2.9	12,400	−36.8	−96.3	−47.4	−0.40	−3.4
		4	19	503			4.4				378			134	1.9	6,510	−37.2	−87.0	−47.3	+0.32	−4.6
		5	23	496	452	39.2	3.0	10.1	2.8	1,283	349	67.5	24.8	137	1.4			−88.2		−0.03	−2.3
1062	C1	0	0
		1	6	531	467	46.3	14.7	11.8	5.4	961		73.7	28.1	188	2.3		−36.6	−86.8		−0.29
		2	11	517	451	42.5	7.1	11.7	3.4	1,171		65.8	24.9	280	3.8		−36.6	−86.8		−0.29
		3	16	510	454	41.8	5.2	11.6	2.2	1,213		60.7	23.9	294	5.5		−39.6	−80.8		−0.30
		4	21	517	441	40.8	3.2	11.2	1.0	1,242		53.9	22.9	297	6.0		−35.4	−92.4		−0.28
		5	26	503	456	41.4	0.3	10.1	1.0	1,163		54.1	23.0	294	18.8	4,040	−38.9	−86.4	−41.5	−0.40
	C2	0	0	551	472	52.4	27.5	10.0	403	403		89.5	25.3	1						−0.32
		1	3	545	473	51.7	28.3	10.6	10.1	424		88.2	27.8	9			−1.2	−65.0		−0.30
		3	13	540	472	51.6	27.1	10.8	9.9	430		87.4	26.1	27			−2.7	−75.0		−0.21
		4	18	534	473	51.4	27.2	11.1	9.8	428		87.1	26.8	27			−4.2	−70.3		−0.36
		5	23	538	471	51.3	27.6	10.9	9.8	437		86.8	26.3	33			−4.0	−80.4		−0.32
	C3	0	0	557	468	52.6	26.5	9.9	10.2	422		91.8	26.1	17						+0.09
		1	4	538	466	49.1	22.7	10.4	8.3	468		88.1	26.4	164			−26.6	−82.0		−0.21
		2	9	544	456	47.2	19.6	10.5	6.6	525		83.0	27.2	144			−32.2	−82.2		−0.37
		3	14
		4	19	531	456	45.6	16.0	10.5	5.6	637		82.6	26.3	241			−34.1	−80.5		−0.35
	C4	0	0	548	470	53.2	26.2	9.8	10.4	407		91.5	26.3	2						−0.16
		1	2	543	468	50.5	27.0	11.8	9.9	469		89.4	28.8	10			−6.6	−58.4		−0.22
		2	7	538	470	50.4	26.6	11.7	9.8	499		89.3	28.9	12			−11.0	−80.4		−0.18
		3	12	538	469	49.6	25.8	12.0	9.5	502		88.8	23.8	22			−15.7	−81.7		−0.18
		4	17	536	466	48.7	23.7	11.3	9.2	510		86.8	23.3	38			−22.0	−82.5		−0.05
		5	22	536	463	46.7	22.2	12.4	8.7	608		84.4	27.1	56			−25.0	−82.2		−0.04
	C5	0	0	548	467	52.7	26.7	9.9	10.2	402		913	23.8	3						−0.20
		1	4	536	460	46.0	46.0	19.7	12.7	8.7	668	86.2	28.3	97			−29.8	−73.0		−0.33
		2	9	532	491	45.2	18.2	12.4	6.3	721		75.4	28.8	118			−32.0	−73.2		−0.24
		3	14	528	450	40.6	13.3	13.1	4.8	828		69.2	27.2	169			−35.8	−72.9		−0.37
		4	19	530	452	41.9	13.6	11.7	4.8	789		70.3	28.2	131			−35.4	−73.4		−0.41
		5	24	544	474	44.0	15.5	11.8	5.7	800		81.4	26.8	129			−35.3	−72.9		−0.31

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