Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Lourenço Rafael André rafaell@usp.br Taniguchi Satie Martins César de Castro ccmart@usp.br Wainer Ilana E K C wainer@usp.br 0000-0003-3784-623X Mahiques Michel Michaelovitch mahiques@usp.br 0000-0002-5249-5610 Nagai Renata Hanae renatanagai@gmail.com 0000-0002-1358-5074 Figueira Rubens César Lopes rfigueira@usp.br 0000-0001-8945-4540 Bouloubassi Ioanna D ioanna.bouloubassi@locean.ipsl.fr Bicego Marcia C marciabicego@usp.br 2026 n-Alkane concentrations and molecular indices (CPI, ACL, Paq) from Holocene marine sediment cores MDBT 557 and MDBT 561 (southern Brazilian shelf) dataset https://doi.org/10.1594/PANGAEA.992687 2026-03-09T06:55:31 This dataset presents concentrations of long-chain n-alkanes (nC25–nC33) and derived molecular indices, including Carbon Preference Index (CPI), Average Chain Length (ACL), and Paq, from Holocene marine sediment cores MDBT 557 and MDBT 561, recovered from the southern Brazilian continental shelf. Lipid biomarkers were extracted using organic solvents, purified by column chromatography, and quantified by gas chromatography with flame ionization detection (GC-FID), with surrogate standards used to assess analytical recovery. These data characterize variations in terrigenous organic matter input, vegetation-related signals, and hydrological conditions affecting the continental margin during the Holocene. Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Lourenço Rafael André rafaell@usp.br Taniguchi Satie Martins César de Castro ccmart@usp.br Wainer Ilana E K C wainer@usp.br 0000-0003-3784-623X Mahiques Michel Michaelovitch mahiques@usp.br 0000-0002-5249-5610 Nagai Renata Hanae renatanagai@gmail.com 0000-0002-1358-5074 Figueira Rubens César Lopes rfigueira@usp.br 0000-0001-8945-4540 Bouloubassi Ioanna D ioanna.bouloubassi@locean.ipsl.fr Bicego Marcia C marciabicego@usp.br 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 Blaauw Maarten maarten.blaauw@qub.ac.uk http://chrono.qub.ac.uk/blaauw/ 0000-0002-5680-1515 Christen Andrés 0000-0002-5795-4345 2011 Flexible paleoclimate age-depth models using an autoregressive gamma process journal article Bayesian Analysis 6(3) https://doi.org/10.1214/11-BA618 457-474 Bray E E Evans E D 1961 Distribution of n-paraffins as a clue to recognition of source beds journal article Geochimica et Cosmochimica Acta 22(1) https://doi.org/10.1016/0016-7037(61)90069-2 2-15 Heaton Timothy J 0000-0002-9994-142X Köhler Peter Peter.Koehler@awi.de https://www.awi.de/en/about-us/organisation/staff/single-view/peter-koehler-glaz.html 0000-0003-0904-8484 Butzin Martin mbutzin@marum.de 0000-0002-9275-7304 Bard Edouard bard@cerege.fr 0000-0002-7237-8622 Reimer Ron W Austin William EN bill.austin@st-andrews.ac.uk 0000-0001-6544-3468 Ramsey Christopher Bronk christopher.ramsey@arch.ox.ac.uk 0000-0002-8641-9309 Grootes Pieter Meiert pgrootes@leibniz.uni-kiel.de 0000-0003-4265-3168 Hughen Konrad A khughen@whoi.edu 0000-0003-3201-934X Kromer Bernd kr@uphys1.uphys.uni-heidelberg.de Reimer Paula J 0000-0001-9238-2146 Adkins Jess F jess@gps.caltech.edu 0000-0002-3174-5190 Burke Andreas Cook Mea S msc1@williams.edu 0000-0003-3786-6353 Olsen Jesper 0000-0002-4445-5520 Skinner Luke C lcs32@cam.ac.uk 0000-0002-5050-0244 2020 Marine20 - the marine radiocarbon age calibration curve (0-55,000 cal BP) journal article Radiocarbon 62(4) https://doi.org/10.1017/RDC.2020.68 779-820 Poynter J G Farrimond Paul Robinson Nicole Eglinton Geoffrey 1989 Aeolian-Derived Higher Plant Lipids in the Marine Sedimentary Record: Links with Palaeoclimate book chapter In: Leinen, M, Sarnthein, M (eds.), Paleoclimatology and Paleometeorology: Modern and Past Patterns of Global Atmospheric Transport, Springer Netherlands, Dordrecht https://doi.org/10.1007/978-94-009-0995-3_18 435-462 -52.21 -51.3 -33.79 -33.27 -51.754999999999995 -33.53 2019-06-02T12:20:00 2019-06-02T13:22:00 -90.0 -80.0 vertical profile São Paulo Research Foundation FAPESP https://fapesp.br/ https://doi.org/10.13039/501100001807 17/20344-7 Mudbelts of Southern and Southeast Brazil: Implications on anthropogenic influences on the marine environment https://bv.fapesp.br/pt/bolsas/174327/mudbelts-do-sul-e-sudeste-do-brasil-implicacoes-sobre-as-influencias-antropicas-no-ambiente-marinho/ MDBT_557 -33.79 -52.21 Brazilian southeastern continental shelf -90.0 2019-06-02T12:20:00 Gravity corer GC MDBT_561 -33.27 -51.3 Brazilian southeastern continental shelf -80.0 2019-06-02T13:22:00 Gravity corer GC 1296 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Event Latitude of event Latitude Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Latitude Longitude of event Longitude Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Longitude Date/Time of event Date/Time Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Date/Time Elevation of event Elevation m Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Elevation [m] AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Age, 14C calibrated Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Age model according to Blaauw and Christen (2011), using BACON v2.4.3, with calibration using Marine20 (Heaton et al., 2020) Age [ka BP] n-Alkanes, sum, per unit sediment mass n-A sum/sed µg/g sum http://www.oxforddictionaries.com/definition/american_english/sum n-alkanes summarized Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 n-A sum/sed [µg/g] Sum n-alkanes C25-C33 C25-C33 µg/g Gas chromatography - Flame Ionization Detection (GC-FID), Agilent Technologies, HP7890B Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 C25-C33 [µg/g] n-Alkanes, average chain length ACL n-Alkane n-alkane Calculated according to Poynter (1989) https://doi.org/10.1007/978-94-009-0995-3_18 Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 ACL n-Alkane Average chain length, n-Alkanes, C27-C33 ACL 27-33 n-alkane Calculated according to Poynter (1989) https://doi.org/10.1007/978-94-009-0995-3_18 Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 ACL 27-33 Carbon Preference Index CPI carbon preference index CPI https://doi.org/10.1016/j.marchem.2006.05.001 Calculated according to Bray and Evans (1961) https://doi.org/10.1016/0016-7037(61)90069-2 Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 CPI Aquatic n-alkane proxy Paq Calculated Santos Felipe Rodrigues feliperod@usp.br 0000-0001-8756-5036 Paq CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable alkanes La Plata River southern Brazilian margin vegetation changes author10304 author10930 author114913 author114914 author114915 author115182 author20000 author20003 author20566 author22697 author23214 author23638 author25032 author28583 author31938 author31951 author35455 author38487 author41985 author42007 author43940 author47053 author64066 author69337 author69338 author69767 author729 author74925 author75834 author75835 author83356 author86210 author86211 author86214 award4843 curlevel30 event3358250 event3358251 funder20820 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 journal13658 journal16885 journal1963 journal6009 license21 method11107 method17026 method18842 method18843 method415 method50 method8902 param169593 param27728 param5225 param539226 param555356 param88030 pi86211 ref103773 ref138084 ref138085 ref138086 ref94112 term1073135 term38305 term38380 term39182 term43975 term47957 term53509 term688 term69901 term71533 term75919 topotype3