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  • 21
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    δ13C n-alkane determination of Late Quaternary sediments from the Vankervelsvlei peatland at the southern Cape coast of South Africa (2022)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: African Summer Monsoon; Calendar age; Compound-specific carbon isotopes; Compound-specific hydrogen isotopes; Compound-specific oxygen isotopes; coupled δ2Hn-alkane–δ18Osugar paleohygrometer; DEPTH, sediment/rock; elemental geochemistry; Gas chromatography - Isotope ratio mass spectrometer (GC-IRMS); Grain Size; hydrology; leaf-wax n-alkane; Paleoclimate; PCUWI; peat geochemistry; Piston corer, UWITEC; precipitation reconstruction; Reference/source; relative humidity; South Africa; sugars; Vankervelsvlei; Westerlies; δ13C, n-alkanes; δ13C, n-alkanes, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 392 data points
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  • 22
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    Leaf-wax isotopic analyses of stratigraphic units from the Diepkloof Rock Shelter section (2017)
    PANGAEA
    Details
    Publication Date: 2024-02-14
    Keywords: Carbon Preference Index, n-Alkanes (C27-C33); Diepkloof_Rock_Shelter; DRS; Gas chromatography - Flame Ionization Detection (GC-FID); Gas chromatography - Isotope ratio mass spectrometer (GC-IRMS); n-Alkane, average chain length; n-Alkane C31; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; Norm31 Index; Stratigraphy
    Type: Dataset
    Format: text/tab-separated-values, 227 data points
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  • 23
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    n-Alkane content and compound-specific δ¹³C values of soil samples, river samples, and marine surface samples (2016)
    PANGAEA
    In:  Supplement to: Herrmann, Nicole; Boom, Arnoud; Carr, Andrew S; Chase, Brian M; Granger, Robyn; Hahn, Annette; Zabel, Matthias; Schefuß, Enno (2016): Sources, transport and deposition of terrestrial organic material: A case study from southwestern Africa. Quaternary Science Reviews, 149, 215-229, https://doi.org/10.1016/j.quascirev.2016.07.028
    Details
    Publication Date: 2024-04-11
    Description: Southwestern Africa's coastal marine mudbelt, a prominent Holocene sediment package, provides a valuable archive for reconstructing terrestrial palaeoclimates on the adjacent continent. While the origin of terrestrial inorganic material has been intensively studied, the sources of terrigenous organic material deposited in the mudbelt are yet unclear. In this study, plant wax derived n-alkanes and their compound-specific d13C in soils, flood deposits and suspension loads from regional fluvial systems and marine sediments are analysed to characterize the origin of terrestrial organic material in the southwest African mudbelt. Soils from different biomes in the catchments of the Orange River and small west coast rivers show on average distinct n-alkane distributions and compound-specific d13C values reflecting biome-specific vegetation types, most notably the winter rainfall associated Fynbos Biome of the southwestern Cape. In the fluvial sediment samples from the Orange River, changes in the n-alkane distributions and compound-specific d13C compositions reveal an overprint by local vegetation along the river's course. The smaller west coast rivers show distinct signals, reflecting their small catchment areas and particular vegetation communities. Marine surface sediments spanning a transect from the northern mudbelt (29°S) to St. Helena Bay (33°S) reveal subtle, but spatially coherent, changes in n-alkane distributions and compound-specific d13C, indicating the influence of Orange River sediments in the northern mudbelt, the increasing importance of terrigenous input from the adjacent western coastal biomes in the central mudbelt, and contributions from the Fynbos Biome to the southern mudbelt. These findings indicate the different sources of terrestrial organic material deposited in the mudbelt, and highlight the potential the mudbelt has to preserve evidence of environmental change from the adjacent continent.
    Keywords: Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; MARUM
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 24
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    (Supplementary Table S3) Relative abundance of n-alkane from mudbelt surface sediment samples off the west coast of South Africa (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-11
    Keywords: Center for Marine Environmental Sciences; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; GeoB8319-1; GeoB8321-1; GeoB8322-1; GeoB8323-1; GeoB8324-1; GeoB8325-1; GeoB8327-1; GeoB8332-3; Latitude of event; Longitude of event; M57/1; MARUM; Meteor (1986); MUC; MultiCorer; n-Alkane C23 of total alkanes; n-Alkane C24 of total alkanes; n-Alkane C25 of total alkanes; n-Alkane C26 of total alkanes; n-Alkane C27 of total alkanes; n-Alkane C28 of total alkanes; n-Alkane C29 of total alkanes; n-Alkane C30 of total alkanes; n-Alkane C31 of total alkanes; n-Alkane C32 of total alkanes; n-Alkane C33 of total alkanes; n-Alkane C34 of total alkanes; n-Alkane C35 of total alkanes; RAiN; Regional Archives for Integrated iNvestigations
    Type: Dataset
    Format: text/tab-separated-values, 118 data points
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  • 25
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    n-Alkane content and compound-specific δ¹³C values of surface sediments of the multicorer GeoB8332-3, GeoB8327-1, GeoB8325-1, GeoB8324-1, GeoB8321-1, GeoB8322-1, GeoB8323-1, GeoB8319-1 (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-11
    Keywords: Calculated; Carbon Preference Index, n-Alkanes; Center for Marine Environmental Sciences; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Elevation of event; Event label; GeoB8319-1; GeoB8321-1; GeoB8322-1; GeoB8323-1; GeoB8324-1; GeoB8325-1; GeoB8327-1; GeoB8332-3; Latitude of event; Longitude of event; M57/1; MARUM; Meteor (1986); MUC; MultiCorer; n-Alkane, average chain length; n-Alkane, C31/(C29+C31) ratio; n-Alkane, C33/(C29+C33) ratio; n-Alkane C19; n-Alkane C20; n-Alkane C21; n-Alkane C22; n-Alkane C23; n-Alkane C24; n-Alkane C25; n-Alkane C26; n-Alkane C27; n-Alkane C28; n-Alkane C29; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C30; n-Alkane C31; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C32; n-Alkane C33; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkane C34; n-Alkane C35; RAiN; Regional Archives for Integrated iNvestigations; Sum n-alkanes C25-C33
    Type: Dataset
    Format: text/tab-separated-values, 234 data points
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  • 26
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    (Supplementary Table S2) Relative abundance of n-alkane from river samples, southwestern Africa (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-11
    Keywords: Center for Marine Environmental Sciences; Event label; Latitude of event; Longitude of event; MARUM; n-Alkane C23 of total alkanes; n-Alkane C24 of total alkanes; n-Alkane C25 of total alkanes; n-Alkane C26 of total alkanes; n-Alkane C27 of total alkanes; n-Alkane C28 of total alkanes; n-Alkane C29 of total alkanes; n-Alkane C30 of total alkanes; n-Alkane C31 of total alkanes; n-Alkane C32 of total alkanes; n-Alkane C33 of total alkanes; n-Alkane C34 of total alkanes; n-Alkane C35 of total alkanes; ORF_10S; ORF_14; ORF_15; ORF_20; ORF_21; ORF_22; ORF_23; ORF_24S; ORF_25; ORF_26; ORF_27S; ORF_29B; ORF_29S; ORF_29T; ORF_31S; ORF_33; ORF_34S; ORF_35; ORF_36S; ORF_37; ORF_40; ORF_8; RAiN; Regional Archives for Integrated iNvestigations; River; Sample code/label; Sample type
    Type: Dataset
    Format: text/tab-separated-values, 352 data points
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  • 27
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    (Supplementary Table S1) Proxies of n-alkane from soil samples from southwestern Africa (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-11
    Keywords: Biome; Carbon Preference Index, n-Alkanes; Center for Marine Environmental Sciences; CNT2-3; CNT3-1; CNT5-3; CNT6-2; Event label; FB1-1; FB2-1; FB3-1; FB3-4; FB4-1; FB4-3; FB5-3; FB5-4; FB6-1; FB6-2; GTC11-3; GTC12-2; GTC12-3; GTC13-2; GTC14-2; GTC15-3; GTC16-2; GTC16-3; GTC17-3; GTC18-2; GTC18-3; GTC19-2; GTC19-3; GTC20-2; GTC21-3; GTC23-2; GTC23-3; GTC24-3; GTC25-2; GTC27-3; GTC28-2; GTC28-3; GTC30-2; GTC30-3; GTC6-3; GTC7-1; GTC8-1; GTC8-2; GTC8-3; GTC9-1; HEIGHT above ground; Height aboveground, maximum; Height aboveground, minimum; MARUM; n-Alkane, average chain length; n-Alkane, C31/(C29+C31) ratio; n-Alkane, C33/(C29+C33) ratio; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; NK1-2; NK1-3; RAiN; Regional Archives for Integrated iNvestigations; SK10-3; SK11-3; SK1-2; SK12-3; SK1-4; SK15-2; SK2-1; SK2-2; SK3-4; SK4-1; SK5-3; SK6-1; SK6-3; SK7-1; SK8-3; SK9-3; SK9-4; SP1; Sum n-alkanes C25-C33; SV2-3; SV2-4; SV3-3; SV4-1; SV4-3; SV5-2; SV5-3
    Type: Dataset
    Format: text/tab-separated-values, 827 data points
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  • 28
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    Deuterium isotope ratios of sediment core VOV16-1, lake Voёlvlei (2021)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Keywords: AGE; compound-specific stable isotope analysis; DEPTH, sediment/rock; Geochemistry; Holocene climate; MHC; Motor hammer corer; n-alkanes; sea-level change; South Africa; VOV16-1; δ Deuterium, n-alkanes; δ Deuterium, n-alkanes, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 146 data points
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  • 29
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    δ Deuterium n-alkane determination of Late Quaternary sediments from the Vankervelsvlei peatland at the southern Cape coast of South Africa (2022)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Keywords: African Summer Monsoon; Calendar age; Compound-specific carbon isotopes; Compound-specific hydrogen isotopes; Compound-specific oxygen isotopes; coupled δ2Hn-alkane–δ18Osugar paleohygrometer; DEPTH, sediment/rock; elemental geochemistry; Gas chromatography - Isotope ratio mass spectrometer (GC-IRMS); Grain Size; hydrology; leaf-wax n-alkane; Paleoclimate; PCUWI; peat geochemistry; Piston corer, UWITEC; precipitation reconstruction; Reference/source; relative humidity; South Africa; sugars; Vankervelsvlei; Westerlies; δ Deuterium, n-alkanes; δ Deuterium, n-alkanes, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 374 data points
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  • 30
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    Palynology of marine sediment core SBQW4, Saldanha Bay (South Africa), early Miocene (2017)
    PANGAEA
    In:  Supplement to: Neumann, Frank Harald; Roberts, David; Cawthra, Hayley C; Carr, Andrew S; Scott, Louis; Durugbo, Ernest; Humphries, Marc; Cowling, Richard; Bamford, Marion; Musekiwa, Chiedza; Machutchon, Michael (2017): Palaeoenvironments during a terminal Oligocene or early Miocene transgression in a fluvial system at the southwestern tip of Africa. Global and Planetary Change, 150, 1-23, https://doi.org/10.1016/j.gloplacha.2017.01.007
    Details
    Publication Date: 2024-02-16
    Description: A multi-proxy study of an offshore core in Saldanha Bay (South Africa) provides new insights into fluvial deposition, ecosystems, phytogeography and sea-level history during the late Paleogene-early Neogene. Offshore seismic data reveal bedrock topography, and provide evidence of relative sea levels as low as -100 m during the Oligocene. 3D landscape reconstruction reveals hills, plains and an anastomosing river system. A Chattian or early Miocene age for the sediments is inferred from dinoflagellate taxa Distatodinium craterum, Chiropteridium lobospinosum, Homotryblium plectilum and Impagidinium paradoxum. The subtropical forest revealed by palynology includes lianas and vines, evergreen trees, palms and ferns, implying higher water availability than today, probably reduced seasonal drought and stronger summer rainfall. From topography, sedimentology and palynology we reconstruct Podocarpaceaedominated forests, Proto-Fynbos, and swamp/riparian forests with palms and other angiosperms. Rhizophoraceae present the first South African evidence of Palaeogene/Neogene mangroves. Subtropical woodland-thicket with Combretaceae and Brachystegia (Peregrinipollis nigericus) probably developed on coastal plains. Some of the last remaining Gondwana elements on the sub-continent, e.g., Araucariaceae, are recorded. Charred particles signal fires prior to the onset of summer dry climate at the Cape. Marine and terrestrial palynomorphs, together with organic and inorganic geochemical proxy data, suggest a gradual glacio-eustatic transgression. The data shed light on Southern Hemisphere biogeography and regional climatic conditions at the Palaeogene-Neogene transition. The proliferation of the vegetation is partly ascribed to changes in South Atlantic oceanographic circulation, linked to the closure of the Central American Seaway and the onset of the Benguela Current ~14 Ma.
    Keywords: Achomosphaera ramulifera; Achomosphaera sp.; Aizoaceae; Anacardiaceae; Araliaceoipollenites reticuloides; Araucariacites; Araucariacites australis; Arecipites cf. otagoensis; Arecipites plectilimuratus; Arecipites spp.; Artemisiaepollenites; Baculatisporites; Baumannipollis variaperturatus; Bequaertiodendron; Blaeria-type; Botryococcus; Brachylaena-type; Brachysporisporites; Bruguieria-type; Caesalpiniaceae; Camarazonosporites; Camarazonosporites bankiensis; Canthiumidites spp.; Caprifoliipites viburnoides; Celastraceae; Celtipollenites sp.; cf. Aceripollenites; cf. Byttneripollis; cf. Dacrydiumites; cf. Dichrostachys-type; cf. Dicolpopollis spp.; cf. Fraxinipollis; cf. Quercoidites henrici; cf. Slovakipollis; cf. Styraxipollis stuchliki; cf. Triporotetradites sp.; cf. Verrucatiporites rotundiporus; Charcoal; Chenopodiaceae; Chiropteridium lobospinosum; Chiropteridium sp.; Christensenia-type; Clavatipollenites spp.; Combretaceae; Commiphora-type; Cooksonidium capricornium; Cordosphaeridium minimum; Core; CORE; Corrugatisporites sp.; Crotonipollis spp.; Cryptogrammasporis spp.; Cupaniedites indeterminable; Cupaniedites major; Cupressaceae/Taxodiaceae; Cupuliferoipollenites oviformis; Cyathidites australis; Cymatiosphaera; Cyperaceae; Cyperaceaepollis piriformis; Debarya; DEPTH, sediment/rock; Dinoflagellate indeterminata; Dinoflagellates, total; Diospyropollenites sp.; Distatodinium craterum; Equisetum sp.; Ericipites callidus; Ericipites spp.; Euphorbiaceae; Fabaceae; Foraminifera, linings; Fungal fruit-bodies; Fungal germling; Fungal spores; Fungi; Galium-type; Geraniaceae; Glaphyrocysta sp.; Gleicheniidites; Gleicheniidites spp.; Glencopollis ornatus; Graminidites cf. crassiglobosus; Graminidites cf. neogenicus; Graminidites spp.; Grewia-type; Grootipollis sp.; Hafniasphaera septata; Homotryblium plectilum; Hygrophila-type; Hypha; Hystrichokolpoma rigaudiae; Ilexpollenites margaritatus; Ilexpollenites spp.; Illexpollenites illiacus; Impagidinium paradoxum; Involutisporis; Laevigatosporites haardtii; Leiotriletes maximus; Leiotriletes maxoides; Leiotriletes wolffii; Liliacidites; Liliacidites minutes; Liliacidites spp.; Ludwigia-type; Lycopodiella inundata; Malvaceae; Manilkara-type; Meliaceoidites sp.; Microcachrydites antarcticus; Microfoveolatisporis fromensis; Microsclerotium; Mohria-type; Momipites sp.; Monocolpopollenites; Monocolpopollenites spp.; Mutisiae; Mutisiapollis viteauensis; Myricipites harrisii; Myricipites spp.; Myrtaceidites parvus; Neuradaceae; Oleoidearumpollenites spp.; Operculodinum centrocarpus; Ovoidites sp.; Palmae-trichotomosulcate; Parthenopollenites formosus; Parthenopollenites marcodurensis; Parthenopollenites neshobensis; Peregrinipollis nigericus; Phoenix-type; Podocarpidites; Podocarpidites kamiesberg; Podocarpidites spp.; Podocarpidites torquatus; Pollen, land, total; Polygala-type; Polypodiaceoisporites sp.; Potamogeton-type; Prasinophytes; Propylipollis meyeri; Propylipollis sp.; Proteacidites; Proteacidites bakkeri granulatus; Proteacidites spp.; Pseudoschizaea sp.; Pseudowinterapollis couperi; Psilatricolporites cf. atalangensis; Psilatricolporites crassiexinus; Psilatricolporites operculatus; Psilatricolporites quenua; Pterocelastrus-type; Pterospermella spp.; Quercoidites spp.; Quercopollenites cf. asper; Quercopollenites cf. granulatus; Restionaceae; Reticulatosphaera cf. actinocoronata; Retitriletes spp.; Rhamnaceaepollenites sp.; Rhizophoraceae; Rhoipites alveolatus; Rhoipites arnotiensis; Rhoipites couperi; Rhoipites spp.; Rhuspollenites sp.; Rhynchosia-type; Rosaceae; Rubiaceae; Rugulasporites spp.; Saldanha Bay, South Africa; Santalaceae; Sapotaceoidaepollenites spp.; SBQW4; Scrophulariaceae; Sigmopollis sp.; Simpsonipollis grandis; Solanum-type; Sparganiaceaepollenites barungensis; Spiniferites mirabilis; Spiniferites pseudofurcatus; Spiniferites ramosus; Spiniferites spp.; Spinitricolpites jennerclarkei; Spinitricolpites spp.; Spirostachys-type; Spores, monolete; Spores, trilete; Stereoisporites sp.; Sum; Sum algae; sum aquatics and water plants; Sum charcoal; sum Cryptogams; sum Fungi; sum herbs and shrublets; sum trees and shrubs; Tetracolporopollenites sapotoides; Tetraploea; Thymelipollis sp.; Todisporites spp.; Tricolpites; Tricolpites gillii; Tricolporopollenites; Tricolporopollenites brinkiae; Tricolporopollenites coetzeeae; Tricolporopollenites eofagoides; Tricolporopollenites marginatus; Triorites operculatus; Triporopollenites namaquensis; Tubulifloridites anthemidearum; Tubulifloridites antipodica; Tubulifloridites gigans; Tubulifloridites macroechinatus; Tubulifloridites spp.; Umbeliferoipollenites spp.; Unknown pollen and spores; Urticales; Varia; Verrucatisporites alienus; Verrucatisporites favus; Verrucatisporites spp.; Vitaceae; Zonalapollenites spp.; Zonalopollenites cf. gracilis; Zonalopollenites perisaccate; Zonocostites ramonae; Zygnemataceae
    Type: Dataset
    Format: text/tab-separated-values, 5302 data points
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