/* DATA DESCRIPTION:
Citation:	Santos, Felipe Rodrigues; Lourenço, Rafael André; Taniguchi, Satie; Martins, César de Castro; Wainer, Ilana E K C; Mahiques, Michel Michaelovitch; Nagai, Renata Hanae; Figueira, Rubens César Lopes; Bouloubassi, Ioanna D; Bicego, Marcia C (2026): Compound-specific δ¹³C values of long-chain n-alkanes from Holocene marine sediment core MDBT 561 (southern Brazilian shelf) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.992685
Abstract:	This dataset includes compound-specific stable carbon isotope (δ¹³C) values of long-chain n-alkanes (nC27–nC33) from the Holocene marine sediment core MDBT 561, collected on the southern Brazilian continental shelf. Individual n-alkanes were analyzed using gas chromatography–combustion–isotope ratio mass spectrometry (GC-C-IRMS). The compound-specific isotope data provide information on the sources and isotopic composition of terrigenous organic matter delivered to the shelf, supporting reconstructions of vegetation dynamics and continental hydrological variability during the Holocene.
Keyword(s):	alkanes; La Plata River; southern Brazilian margin; vegetation changes
Supplement to:	Santos, Felipe Rodrigues; Lourenço, Rafael André; Taniguchi, Satie; Martins, César de Castro; Wainer, Ilana E K C; Mahiques, Michel Michaelovitch; Nagai, Renata Hanae; Figueira, Rubens César Lopes; Bouloubassi, Ioanna D; Bicego, Marcia C (in review): Holocene composition, origin, and evolution of terrigenous organic matter in the southwestern Atlantic Ocean: Insights about vegetation, climate and oceanographic variations. Paleoceanography and Paleoclimatology
Funding:	São Paulo Research Foundation (FAPESP) (URI: https://fapesp.br/), grant/award no. 17/20344-7: Mudbelts of Southern and Southeast Brazil: Implications on anthropogenic influences on the marine environment (URI: https://bv.fapesp.br/pt/bolsas/174327/mudbelts-do-sul-e-sudeste-do-brasil-implicacoes-sobre-as-influencias-antropicas-no-ambiente-marinho/)
Coverage:	MEDIAN LATITUDE: -33.530000 * MEDIAN LONGITUDE: -51.755000 * SOUTH-BOUND LATITUDE: -33.790000 * WEST-BOUND LONGITUDE: -52.210000 * NORTH-BOUND LATITUDE: -33.270000 * EAST-BOUND LONGITUDE: -51.300000
	DATE/TIME START: 2019-06-02T12:20:00 * DATE/TIME END: 2019-06-02T13:22:00
	MINIMUM ELEVATION: -90.0 m * MAXIMUM ELEVATION: -80.0 m
Event(s):	MDBT_557 * LATITUDE: -33.790000 * LONGITUDE: -52.210000 * DATE/TIME: 2019-06-02T12:20:00 * ELEVATION: -90.0 m * LOCATION: Brazilian southeastern continental shelf * METHOD/DEVICE: Gravity corer (GC)
	MDBT_561 * LATITUDE: -33.270000 * LONGITUDE: -51.300000 * DATE/TIME: 2019-06-02T13:22:00 * ELEVATION: -80.0 m * LOCATION: Brazilian southeastern continental shelf * METHOD/DEVICE: Gravity corer (GC)
Parameter(s):	AGE [ka BP] (Age) * GEOCODE * PI: Santos, Felipe Rodrigues (https://orcid.org/0000-0001-8756-5036, feliperod@usp.br) * METHOD/DEVICE: Accelerator mass spectrometry (AMS)
	n-Alkane C27, δ13C [‰ PDB] (C27 δ13C) * PI: Santos, Felipe Rodrigues (https://orcid.org/0000-0001-8756-5036, feliperod@usp.br) * METHOD/DEVICE: Gas chromatograph–combustion–isotope ratio mass spectrometer (GC-C-IRMS), Thermo Scientific, Trace GC Ultra coupled to Delta V Advantage * COMMENT: vs. VPDB
	n-Alkane C29, δ13C [‰ PDB] (C29 δ13C) * PI: Santos, Felipe Rodrigues (https://orcid.org/0000-0001-8756-5036, feliperod@usp.br) * METHOD/DEVICE: Gas chromatograph–combustion–isotope ratio mass spectrometer (GC-C-IRMS), Thermo Scientific, Trace GC Ultra coupled to Delta V Advantage * COMMENT: vs. VPDB
	n-Alkane C31, δ13C [‰ PDB] (C31 δ13C) * PI: Santos, Felipe Rodrigues (https://orcid.org/0000-0001-8756-5036, feliperod@usp.br) * METHOD/DEVICE: Gas chromatograph–combustion–isotope ratio mass spectrometer (GC-C-IRMS), Thermo Scientific, Trace GC Ultra coupled to Delta V Advantage * COMMENT: vs. VPDB
	n-Alkane C33, δ13C [‰ PDB] (C33 δ13C) * PI: Santos, Felipe Rodrigues (https://orcid.org/0000-0001-8756-5036, feliperod@usp.br) * METHOD/DEVICE: Gas chromatograph–combustion–isotope ratio mass spectrometer (GC-C-IRMS), Thermo Scientific, Trace GC Ultra coupled to Delta V Advantage * COMMENT: vs. VPDB
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Status:	Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels)
Size:	159 data points
*/
Age [ka BP]	C27 δ13C [‰ PDB]	C29 δ13C [‰ PDB]	C31 δ13C [‰ PDB]	C33 δ13C [‰ PDB]
0.300	-28.11	-29.24	-28.98	-26.23
0.433	-28.75	-28.88	-28.45	-24.77
0.564		-29.41	-28.51	-25.82
0.756	-28.75	-28.90	-28.15	-24.12
0.959	-28.12	-28.78	-27.73	-23.52
1.149	-27.89	-28.41	-27.19	-24.52
1.276	-27.67	-28.38	-27.63	-23.62
1.341	-28.06	-28.88	-27.33	-23.63
1.538	-26.95	-28.24	-27.37	-22.69
1.606	-27.21	-28.19	-27.54	-25.08
1.809	-28.10	-27.97	-26.70	-23.81
1.880	-28.19	-28.19	-26.95	-24.27
1.952	-27.69	-28.20	-26.88	-24.10
2.197	-27.93	-28.02	-26.86	-24.32
2.446	-27.41	-28.39	-26.73	-24.18
2.610	-27.19	-27.64	-27.17	-24.86
2.696	-26.48	-27.10	-25.80	-24.09
2.782	-26.79	-27.87	-26.65	-24.29
3.043	-26.75	-27.15	-26.96	-23.88
3.129	-26.85	-27.57	-27.52	-25.34
3.553	-27.94	-28.03	-27.11	-24.84
3.799	-26.92	-27.98	-27.02	-24.04
3.966	-29.16	-28.60	-27.04	-25.36
4.223	-26.85	-27.79	-26.81	-24.09
4.577	-25.88	-28.05	-27.37	-24.35
4.967	-26.70	-28.11	-26.65	-23.68
5.365	-26.95	-27.96	-26.26	-24.08
5.646	-26.42	-27.06	-26.30	-23.82
6.059	-26.35	-27.85	-26.48	-23.29
6.197	-26.09	-27.02	-27.28	-24.12
6.614	-27.95	-28.23	-27.60	-24.89
7.025	-28.23	-27.62	-27.55	-24.78
7.450	-26.09	-27.40	-26.91	-24.85
8.254	-27.66	-29.61	-26.29	-23.33
8.498	-26.73	-27.22	-26.39	-23.87
8.861	-27.76	-27.26	-26.83	-24.08
9.344	-27.97	-27.60	-27.10	-26.44
11.178	-28.35	-27.77	-27.50	-25.49
11.818	-28.06	-27.92	-27.36	-25.65
12.138	-27.94	-27.33	-27.54	-25.17