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Martínez-Braceras, Naroa; Payros, Aitor; Dinarès-Turell, Jaume; Rosales, Idoia; Arostegi, Javier; Silva-Casal, Roi (2024): Organic geochemistry of the lower Pliensbachian Santiurde section (Basque-Cantabrian basin, northern Spain) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967947

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Published: 2024-06-03 • DOI registered: 2024-07-02

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Abstract:
We present organic geochemistry from the lowermost Pliensbachian organic-rich hemipelagic Santiurde section (Basque-Cantabrian basin, north Iberian palaeomargin, Spain). The Santiurde section studied herein is exposed at exit 144 of motorway A67 (UTM X411431.091 Y4769002.593), approximately 50 km south-west of Santander city. The expanded hemiplegic succession offered a potentially valuable orbitally paced stratigraphic record. An integrated multiproxy study was performed in the 19 beds found between 12.4 and 15.95 m of the lower Pliensbachian succession in order to disentangle what sedimentary processes and environmental factors influenced the formation of the hemipelagic rhytmites. Sampling was mainly carried out in 2019. One sample from the central part of each bed was studied for their mineralogical content, their organic geochemistry, and their elemental composition. Organic carbon and organic nitrogen contents, as well as their isotopic d13Corg and d15Norg values were obtained by combustion of powdered and decarbonated samples in an elemental analyzer Flash EA 1112 (ThermoFinnigan) connected to a DeltaV Advantage mass spectrometer (Thermo Scientific) at the University of A Coruña, Spain.
Keyword(s):
Basque-Cantabria basin; Calcium Carbonate content; colour; inorganic geochemistry; Organic Geochemistry; Pliensbachian; whole-rock mineralogy
Funding:
Agencia Estatal de Investigación (AEI), grant/award no. MARSA22/05: Margarita Salas post-doctoral grant of the Spanish Government with Next Generation funds from the European Union
Agencia Estatal de Investigación (AEI), grant/award no. PID2019-105670GB-I00: Spanish Government (MCIN/AEI)
Basque Government, grant/award no. IT602-22: Consolidated Research Group of the Basque Government
University of the Basque Country (UPV/EHU), grant/award no. DOCREC19/35: Post-doctoral grant from the University of the Basque Country
University of the Basque Country (UPV/EHU), grant/award no. ESPDOC21/49: Post-doctoral grant from the University of the Basque Country
Coverage:
Latitude: 43.068561 * Longitude: -4.087829
Date/Time Start: 2019-04-22T00:00:00 * Date/Time End: 2019-04-22T00:00:00
Minimum Elevation: 730.0 m * Maximum Elevation: 730.0 m
Event(s):
Santiurde_section * Latitude: 43.068561 * Longitude: -4.087829 * Elevation: 730.0 m * Location: Basque-Cantabrian basin, northern Spain * Method/Device: Hammer (HAM)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Sample IDSample IDMartínez-Braceras, Naroa
2 Sample code/labelSample labelMartínez-Braceras, NaroaBed label
3 Stratigraphic heightStrat heightmMartínez-Braceras, Naroa
4 Nitrogen, organicN org%Martínez-Braceras, NaroaElemental analyzer Flash EA 1112, ThermoFinnigan; coupled with DeltaV Advantage mass spectrometer, Thermo Scientific
5 δ15N, total nitrogenδ15N TN‰ airMartínez-Braceras, NaroaElemental analyzer Flash EA 1112, ThermoFinnigan; coupled with DeltaV Advantage mass spectrometer, Thermo Scientific
6 Carbon, organicC org%Martínez-Braceras, NaroaElemental analyzer Flash EA 1112, ThermoFinnigan; coupled with DeltaV Advantage mass spectrometer, Thermo Scientific
7 δ13C, organic carbonδ13C Corg‰ PDBMartínez-Braceras, NaroaElemental analyzer Flash EA 1112, ThermoFinnigan; coupled with DeltaV Advantage mass spectrometer, Thermo Scientific
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
133 data points

Data

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

1 
Sample ID		2 
Sample label		3 
Strat height [m]		4 
N org [%]		5 
δ15N TN [‰ air]		6 
C org [%]		7 
δ13C Corg [‰ PDB]
ST18M3ST 18M12.500.072.631.94-28.90
ST18L3ST 18L12.690.022.050.38-27.79
ST19MA3ST 18AM12.880.093.092.86-29.00
ST19LA3ST 18AL13.070.061.692.78-28.74
ST19MB3ST 18BM13.270.082.763.30-29.17
ST19LB3ST 18BL13.460.052.001.63-28.29
ST19MC3ST 19M13.650.072.902.84-29.27
ST19LC2ST 19L13.870.021.050.30-27.64
ST20M2ST 20M14.040.093.112.54-29.14
ST20L3ST 20L14.170.022.440.26-27.22
ST21M3ST 21M14.350.093.183.41-29.56
ST21L3ST 21L14.540.022.780.30-27.68
ST22MA3ST 21AM14.740.083.214.03-29.48
ST22LA3ST 21AL14.890.041.901.00-27.78
ST22MB5ST 21BM15.080.072.952.30-28.91
ST22LB3ST 21BL15.280.042.071.02-28.03
ST22MC2ST 22M15.430.072.802.35-29.21
ST22LC4ST 22L15.730.021.960.37-27.95
ST22AM3ST 22AM15.850.082.962.58-29.05