Citation:

PANGAEA.995258 (DOI registration in progress)

Name: Sediment and pore water geochemistry of seep core MOZ4-CSF04 offshore northwest Madagascar (PAMELA-MOZ4, 2015)
Published: 2026-07-09
License: https://creativecommons.org/licenses/by/4.0/
Keywords: carbonates; Diagenesis; Gas seeps; iron; Madagascar; Marine sediment; Methane; pore water; Radiocarbon; Stable isotopes; Sulfur

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Published: 2026-07-09

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Abstract:

This dataset contains biogeochemical solid-phase and pore water data from sediment core MOZ4-CSF04 (named S2-G in the publication cited below), collected on 14 November 2015 during the PAMELA-MOZ4 oceanographic cruise offshore northwest Madagascar. This core was analyzed to assess the impact of fluid seepage on sediment biogeochemistry and diagenetic processes. Solid-phase parameters comprise total organic carbon (TOC), stable carbon isotopes of organic matter, reactive iron phases (dithionite-extractable Fe), pyrite content (FeS2) and its sulfur isotopic composition (δ34S), carbonate mineralogy (calcite, high Mg-calcite, aragonite), and stable carbon and oxygen isotopes of background carbonates and concretions, as well as δ13C of organic carbon associated with concretions. Bulk elemental concentrations of Fe and Al were determined by X-ray fluorescence (XRF). Pore water analyses include dissolved methane (CH4), sulfate (SO4), sulfide (H2S), dissolved iron (Fe), manganese (Mn), calcium (Ca), magnesium (Mg), total alkalinity (TA), and stable carbon isotopic compositions of methane and dissolved inorganic carbon (DIC). The dataset also includes porosity measurements.

Keyword(s):

carbonates; Diagenesis; Gas seeps; iron; Madagascar; Marine sediment; Methane; pore water; Radiocarbon; Stable isotopes; Sulfur

Supplement to:

Rooze, Jurjen; Sansjofre, Pierre; Meile, Christof; Böttcher, Michael Ernst; Jouet, Gwenael; Pastor, Lucie (2026): Reversible anaerobic oxidation of methane, carbon assimilation, and mineral authigenesis in pockmark sediments over the past 40 kyr: Insights from C–S–O isotopes and diagenetic modelling. Geochimica et Cosmochimica Acta, 424, 361-376, https://doi.org/10.1016/j.gca.2026.04.020

References:

Canfield, Donald E; Raiswell, Robert; Westrich, Joseph T; Reaves, Christopher M; Berner, Robert A (1986): The use of chromium reduction in the analysis of reduced inorganic sulfur in sediments and shales. Chemical Geology, 54 (1-2), 149-155, https://doi.org/10.1016/0009-2541(86)90078-1

Cline, J D (1969): Spectrophotometric determination of hydrogen sulfide in natural waters. Limnology and Oceanography, 14, 454-458, https://doi.org/10.4319/lo.1969.14.3.0454

Kostka, Joel E; Luther, Georg W (1995): Seasonal cycling of Fe in saltmarsh sediments. Biogeochemistry, 29(2), https://doi.org/10.1007/BF00000230

Coverage:

Latitude: -15.370500 * Longitude: 45.951833

Date/Time Start: 2015-11-14T00:00:00 * Date/Time End: 2015-11-14T00:00:00

Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 10.673 m

Event(s):

MOZ4-CSF04 (S2-G) * Latitude: -15.370500 * Longitude: 45.951833 * Date/Time: 2015-11-14T00:00:00 * Location: Indian Ocean * Campaign: * Basis: Pourquoi Pas ? (2005)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Rooze, Jurjen
2	Optional event label	Event 2		Rooze, Jurjen
3	DEPTH, sediment/rock	Depth sed	m	Rooze, Jurjen		Geocode – Core processing software (CINEMA2)
4	Carbon, organic, total	TOC	%	Rooze, Jurjen	Cavity ring-down spectroscopy (CRDS) isotopic water analyzer, Picarro Inc., L2130-i; coupled to a Combustion Module (CM), Picarro Inc., A020
5	δ13C, total organic carbon	δ13C TOC	‰ PDB	Rooze, Jurjen	Cavity ring-down spectroscopy (CRDS), isotopic water analyzer, Picarro Inc., L2101-i	vs. VPDB
6	Iron, dithionite extractable	FeD	%	Rooze, Jurjen	Inductively coupled plasma-atomic emission spectrometer (ICP-AES), HORIBA, ULTIMA 2	Dithionite extraction according to Kostka and Luther III (1994).
7	Iron disulfide	FeS2	%	Rooze, Jurjen	Chromium reducible sulfur extraction according to Canfield et al. (1986)
8	δ34S, FeS2	δ34S FeS2	‰ CDT	Rooze, Jurjen	Elemental analyzer - isotope ratio mass spectrometer (EA-IRMS), Europa Scientific, ANCA-SL/20–20	VCDT
9	Calcite	Cal	%	Rooze, Jurjen	X-Ray Diffractometer, Bruker Corporation, D8 ADVANCE
10	High magnesium calcite	HMC	%	Rooze, Jurjen	X-Ray Diffractometer, Bruker Corporation, D8 ADVANCE
11	Aragonite	Arg	%	Rooze, Jurjen	X-Ray Diffractometer, Bruker Corporation, D8 ADVANCE
12	δ13C	δ13C	‰ PDB	Rooze, Jurjen	Isotope ratio mass spectrometer (IRMS), Thermo Finnigan, MAT 253; coupled with Gas bench II, Thermo Fisher Scientific	vs. VPDB, background carbonate
13	δ18O	δ18O	‰	Rooze, Jurjen	Isotope ratio mass spectrometer (IRMS), Thermo Finnigan, MAT 253; coupled with Gas bench II, Thermo Fisher Scientific	vs. VPDB, background carbonate
14	Iron	Fe	%	Rooze, Jurjen	Wavelength Dispersive X-Ray Fluorescence (WDXRF), Bruker Corporation, S8 Tiger
15	Aluminium	Al	%	Rooze, Jurjen	Wave-length dispersive X-ray fluorescence spectroscopy (WD-XRF)
16	Methane, dissolved	CH4 diss	mmol/l	Rooze, Jurjen	Flame Ionization Detector (FID), Perichrom, PR2100
17	δ13C, methane	δ13C CH4	‰ PDB	Rooze, Jurjen	Cavity ring-down spectrometer (CRDS), Picarro, G2201-i	vs. VPDB
18	Sulfate, dissolved	[SO4]2- diss	mmol/l	Rooze, Jurjen	Ion chromatograph, Dionex Corporation, ICS-5000
19	Hydrogen sulfide, dissolved	H2S diss	mmol/l	Rooze, Jurjen	Cline method according to Cline (1969)
20	Iron, dissolved	Fe diss	µmol/l	Rooze, Jurjen	Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Element XR
21	Alkalinity, total	AT	mmol(Eq)/l	Rooze, Jurjen	Automatic titrator, Metrohm, 888 Titrando coupled with pH electrode
22	Manganese, dissolved	Mn diss	µmol/l	Rooze, Jurjen	Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Element XR
23	Calcium, dissolved	Ca diss	mmol/l	Rooze, Jurjen	Ion chromatograph, Thermo Scientific, Dionex ICS-5000
24	Magnesium, dissolved	Mg diss	mmol/l	Rooze, Jurjen	Ion chromatograph, Dionex Corporation, ICS-5000
25	δ13C, dissolved inorganic carbon	δ13C DIC	‰ PDB	Rooze, Jurjen	GasBench II-IRMS, MAT 253, Thermo Scientific	vs. VPDB
26	Porosity, total	Poros total		Rooze, Jurjen	Gravimetric analysis	Gravimetric determination from wet and freeze-dried sediment weights
27	δ13C, carbonate	δ13C carb	‰ PDB	Rooze, Jurjen	Cavity ring-down spectrometer (CRDS), Picarro, G2201-i
28	δ18O, carbonate	δ18O carb	‰ PDB	Rooze, Jurjen	Cavity ring-down spectrometer (CRDS), Picarro, G2201-i
29	δ13C, organic carbon	δ13C Corg	‰ PDB	Rooze, Jurjen	Cavity ring-down spectrometer (CRDS), Picarro, G2201-i

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

704 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Event 2	3 Depth sed [m]	4 TOC [%]	5 δ13C TOC [‰ PDB]	6 FeD [%]	7 FeS2 [%]	8 δ34S FeS2 [‰ CDT]	9 Cal [%]	10 HMC [%]	11 Arg [%]	12 δ13C [‰ PDB]	13 δ18O [‰]	14 Fe [%]	15 Al [%]	16 CH4 diss [mmol/l]	17 δ13C CH4 [‰ PDB]	18 [SO4]2- diss [mmol/l]	19 H2S diss [mmol/l]	20 Fe diss [µmol/l]	21 AT [mmol(Eq)/l]	22 Mn diss [µmol/l]	23 Ca diss [mmol/l]	24 Mg diss [mmol/l]	25 δ13C DIC [‰ PDB]	26 Poros total	27 δ13C carb [‰ PDB]	28 δ18O carb [‰ PDB]	29 δ13C Corg [‰ PDB]
MOZ4-CSF04	S2-G	0.000					-27.40
MOZ4-CSF04	S2-G	0.030																								-42.53	2.30	-27.35
MOZ4-CSF04	S2-G	0.030																								-43.20	2.42	-27.11
MOZ4-CSF04	S2-G	0.046																							0.77
MOZ4-CSF04	S2-G	0.050	1.12	-28.46	0.53			10.00	13.00	12.00			3.93	6.88	0.07	-80.73	27.48	0.03	0.00	3.18	0.00	10.00	49.70
MOZ4-CSF04	S2-G	0.100	1.05	-29.55	0.63	2.50	-21.91	11.00	13.00	12.00			3.84	6.74	2.07	-80.08
MOZ4-CSF04	S2-G	0.102																							0.75
MOZ4-CSF04	S2-G	0.120									-14.50	0.00
MOZ4-CSF04	S2-G	0.216																							0.73
MOZ4-CSF04	S2-G	0.220	0.90	-30.09	0.50			11.00	17.00	13.00			3.74	6.47	0.07	-78.19	26.69		0.00		0.00	10.03	49.58
MOZ4-CSF04	S2-G	0.350																								-33.98	1.26	-31.97
MOZ4-CSF04	S2-G	0.350																								-33.63	1.26	-32.55
MOZ4-CSF04	S2-G	0.400																								-39.92	1.75
MOZ4-CSF04	S2-G	0.458																							0.72
MOZ4-CSF04	S2-G	0.460	0.82	-30.96	0.51	2.42		9.00	19.00	14.00			3.68	6.36	0.08	-80.24	26.26		0.00		0.00	9.68	49.77
MOZ4-CSF04	S2-G	0.540																								-40.91	2.48	-26.78
MOZ4-CSF04	S2-G	0.540																								-38.69	2.12	-26.89
MOZ4-CSF04	S2-G	0.690									-14.70	0.10
MOZ4-CSF04	S2-G	0.740									-26.40	1.30
MOZ4-CSF04	S2-G	0.890															26.63	0.70	0.00	4.16	0.00	9.74	49.69	-22.93
MOZ4-CSF04	S2-G	0.900									-12.70	-0.10
MOZ4-CSF04	S2-G	1.020	0.88	-25.86	0.71	3.52	-11.32	11.00	2.00	6.00			5.19	8.66	0.08	-75.01									0.76
MOZ4-CSF04	S2-G	1.137																							0.74
MOZ4-CSF04	S2-G	1.140	0.84	-26.58	0.67			8.00	5.00	7.00			5.10	8.50	0.16
MOZ4-CSF04	S2-G	1.290															25.91	0.40	0.00	5.21	0.00	9.65	50.15	-28.53
MOZ4-CSF04	S2-G	1.350																								-37.97	2.23	-34.83
MOZ4-CSF04	S2-G	1.350																								-38.49	2.19	-35.06
MOZ4-CSF04	S2-G	1.600									-9.30	-0.30
MOZ4-CSF04	S2-G	1.650																								-51.55	2.89	-35.97
MOZ4-CSF04	S2-G	1.650																								-50.85	3.04	-36.42
MOZ4-CSF04	S2-G	1.720	0.87	-31.71	0.74	3.48		6.00	18.00	4.00			4.85	7.83	0.08	-78.96	26.49	0.26	0.00	4.03	0.00	9.66	49.38
MOZ4-CSF04	S2-G	1.724																							0.73
MOZ4-CSF04	S2-G	1.798																							0.74
MOZ4-CSF04	S2-G	1.800	0.97	-26.00	0.71			6.00	5.00	4.00			5.70	9.27	0.05	-77.94
MOZ4-CSF04	S2-G	1.880									-36.70	2.00
MOZ4-CSF04	S2-G	2.080															25.65	1.28	0.00	5.93	0.00	9.49	49.69	-39.95
MOZ4-CSF04	S2-G	2.100																								-39.76	2.43	-44.59
MOZ4-CSF04	S2-G	2.100																								-40.08	2.54	-44.32
MOZ4-CSF04	S2-G	2.290	0.87	-25.94	0.74			6.00	7.00	4.00			5.59	9.15	0.11	-68.68									0.74
MOZ4-CSF04	S2-G	2.300									-27.70	1.40
MOZ4-CSF04	S2-G	2.380															23.45	2.21	0.00	9.03	0.00	9.02	49.89
MOZ4-CSF04	S2-G	2.390	0.93	-26.16	0.78			6.00	4.00	2.00			5.93	9.69	0.10	-68.61									0.75
MOZ4-CSF04	S2-G	2.920															22.07	6.19	0.00	11.15	0.00	8.64	49.54	-50.56
MOZ4-CSF04	S2-G	2.930	1.00	-25.04	0.77	3.55	-7.36	5.00	3.00	2.00			5.52	9.23	0.12	-75.38
MOZ4-CSF04	S2-G	2.932																							0.74
MOZ4-CSF04	S2-G	3.010	1.02	-26.55	0.76			6.00	7.00	3.00			5.55	8.81	0.08	-73.86
MOZ4-CSF04	S2-G	3.012																							0.73
MOZ4-CSF04	S2-G	3.160															19.92	8.07	0.00		0.00	8.37	48.99
MOZ4-CSF04	S2-G	3.368																							0.72
MOZ4-CSF04	S2-G	3.370	1.05	-25.05	0.83	4.52	-10.12	5.00	3.00	2.00			5.83	9.34	0.14
MOZ4-CSF04	S2-G	3.520															14.79	10.46	0.00	20.11	0.00	7.17	49.16
MOZ4-CSF04	S2-G	3.536																							0.73
MOZ4-CSF04	S2-G	3.540	0.97	-24.94	0.81	4.19	-5.35	7.00	4.00	2.00			5.84	9.32	0.08	-81.63
MOZ4-CSF04	S2-G	3.940															9.24		0.00	20.01	0.00	4.54	49.15
MOZ4-CSF04	S2-G	3.950	1.08	-24.77	0.95	5.53	-13.21	6.00	5.00	4.00			6.49	9.14	0.13	-87.47									0.72
MOZ4-CSF04	S2-G	4.030																								-52.48	3.31	-41.24
MOZ4-CSF04	S2-G	4.030																								-52.36	2.79	-40.66
MOZ4-CSF04	S2-G	4.050	1.00	-25.07	0.82	3.86	-5.86	5.00	2.00	2.00			5.61	9.49	0.14	-89.99									0.73
MOZ4-CSF04	S2-G	4.070									-25.40	0.90
MOZ4-CSF04	S2-G	4.240															7.17		0.00	28.65	0.00	5.08	49.22			-55.29	3.28	-49.19
MOZ4-CSF04	S2-G	4.240															7.17		0.00	28.65	0.00	5.08	49.22			-52.64	2.87	-48.51
MOZ4-CSF04	S2-G	4.280									-7.20	-0.50
MOZ4-CSF04	S2-G	4.470	1.04	-28.91	0.80	3.46		7.00	5.00	6.00			5.05	8.25	0.21	-98.47
MOZ4-CSF04	S2-G	4.474																							0.69
MOZ4-CSF04	S2-G	4.580															6.63	8.63	0.00	28.05	0.00	5.02	49.38
MOZ4-CSF04	S2-G	4.590	1.05	-24.62	0.85	4.21		5.00	5.00	3.00			5.97	9.38	0.19
MOZ4-CSF04	S2-G	4.592																							0.71
MOZ4-CSF04	S2-G	5.130															2.10	16.86	0.00	36.45	0.00	4.58	49.30	-52.99
MOZ4-CSF04	S2-G	5.140	0.92	-25.06	0.83	3.85	-1.65	6.00	8.00	3.00			5.56	9.22	0.70
MOZ4-CSF04	S2-G	5.144																							0.72
MOZ4-CSF04	S2-G	5.260	0.96	-23.78	0.85	4.51		6.00	4.00	2.00			5.93	9.37	1.23	-113.40
MOZ4-CSF04	S2-G	5.262																							0.72
MOZ4-CSF04	S2-G	5.400									-53.10	3.00
MOZ4-CSF04	S2-G	5.490															0.56		0.00	27.73	0.00	4.62	49.34
MOZ4-CSF04	S2-G	5.640																								-53.05	2.75	-32.56
MOZ4-CSF04	S2-G	5.640																								-52.36	2.79	-32.91
MOZ4-CSF04	S2-G	5.720	0.93	-28.43	0.77	3.56	-0.98	5.00	15.00	3.00			4.88	8.01	7.66	-91.42									0.67
MOZ4-CSF04	S2-G	5.810															0.36		0.00	22.20	0.00	3.65	48.29
MOZ4-CSF04	S2-G	5.820	1.06	-24.49	0.78			7.00	3.00	3.00			5.53	9.21	11.84	-91.76									0.70
MOZ4-CSF04	S2-G	6.300															0.10	9.12	0.00	28.12	0.00	3.68	49.13	-60.64
MOZ4-CSF04	S2-G	6.320	1.00	-25.67	0.95			9.00	3.00	6.00			5.83	9.04	10.81	-88.85
MOZ4-CSF04	S2-G	6.324																							0.70
MOZ4-CSF04	S2-G	6.527																							0.70
MOZ4-CSF04	S2-G	6.530	0.93	-27.16	0.85			7.00	7.00	4.00			5.43	8.49	8.57	-84.98
MOZ4-CSF04	S2-G	6.770															0.09	15.55	0.00	34.61	0.00	3.60	49.51	-59.05
MOZ4-CSF04	S2-G	6.948																							0.71
MOZ4-CSF04	S2-G	6.950	1.04	-25.14	1.01			9.00	4.00	5.00			5.38	9.06	9.67	-79.29
MOZ4-CSF04	S2-G	7.140															0.34		0.00	25.55	0.00	3.24	48.56
MOZ4-CSF04	S2-G	7.180	0.95	-23.81	1.07	3.07		9.00	4.00	5.00			5.40	8.92	18.23	-78.67									0.70
MOZ4-CSF04	S2-G	7.770															0.35					3.38
MOZ4-CSF04	S2-G	7.780	0.94	-26.09	0.96			10.00	3.00	5.00			5.38	8.83	11.30	-77.03
MOZ4-CSF04	S2-G	7.785																							0.71
MOZ4-CSF04	S2-G	7.900	0.90	-24.35	0.97			10.00	4.00	5.00			5.34	8.74	9.18	-77.78
MOZ4-CSF04	S2-G	7.903																							0.70
MOZ4-CSF04	S2-G	8.377																							0.70
MOZ4-CSF04	S2-G	8.380	0.93	-25.57	0.88			8.00	4.00	5.00			5.13	9.13	8.04	-79.42
MOZ4-CSF04	S2-G	8.497																							0.71
MOZ4-CSF04	S2-G	8.500	0.93	-24.84	0.76	3.79	-8.61	8.00	4.00	5.00			5.45	8.48	6.89	-77.99
MOZ4-CSF04	S2-G	8.660													3.80	-77.19
MOZ4-CSF04	S2-G	9.000															0.24	3.70	0.00	22.28	0.00	3.10	47.37	-53.70
MOZ4-CSF04	S2-G	9.010	1.03	-25.82	0.74			9.00	5.00	6.00			5.12	8.70	3.86	-77.12
MOZ4-CSF04	S2-G	9.012																							0.70
MOZ4-CSF04	S2-G	9.147																							0.70
MOZ4-CSF04	S2-G	9.150	1.07	-24.51	0.73	3.39		9.00	1.00	5.00			5.28	8.97	2.53	-71.97
MOZ4-CSF04	S2-G	9.340															0.10	14.55	0.00	33.68	0.00	3.38	49.40	-65.55
MOZ4-CSF04	S2-G	9.550	1.04	-25.65	0.81	5.33	-15.80	7.00	2.00	4.00			6.22	9.12	2.82	-77.02									0.69
MOZ4-CSF04	S2-G	9.640															0.19	9.19	0.00		0.00	3.46	48.83	-52.77
MOZ4-CSF04	S2-G	9.650	1.03	-25.94	0.87	4.48		8.00	4.00	3.00			5.95	9.23	3.64	-75.93									0.70
MOZ4-CSF04	S2-G	10.040															0.20	6.84	0.00	26.62	0.00	3.62	47.77	-50.40
MOZ4-CSF04	S2-G	10.050	1.15	-26.19	0.88			5.00	7.00	3.00			5.92	8.88	3.08	-78.08									0.69
MOZ4-CSF04	S2-G	10.160	1.09	-24.41	0.90			7.00	3.00	4.00			5.52	8.94	3.26	-77.88									0.69
MOZ4-CSF04	S2-G	10.560	1.09	-25.47	0.97	3.97		8.00	4.00	4.00			5.63	9.06	2.09	-77.25									0.69
MOZ4-CSF04	S2-G	10.660															0.57	8.77	0.00		0.00	3.74	49.29
MOZ4-CSF04	S2-G	10.670	1.02	-26.11	0.91			7.00	2.00	6.00			5.81	9.06
MOZ4-CSF04	S2-G	10.673																							0.70