Boron, carbonate carbon and oxygen isotope analyses of samples from the Yangtze Platform (China), Congo craton (Namibia), and Karatau microcontinent (Kazakhstan) of the Marinoan glaciation
| Cobertura |
MEDIAN LATITUDE: 19.282419 * MEDIAN LONGITUDE: 81.119857 * SOUTH-BOUND LATITUDE: -20.199167 * WEST-BOUND LONGITUDE: 13.995608 * NORTH-BOUND LATITUDE: 43.533910 * EAST-BOUND LONGITUDE: 111.232610 |
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| Data(s) |
02/12/2014
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| Resumo |
Boron isotope patterns preserved in cap carbonates deposited in the aftermath of the younger Cryogenian (Marinoan, ca. 635 Ma) glaciation confirm a temporary ocean acidification event on the continental margin of the southern Congo craton, Namibia. To test the significance of this acidification event and reconstruct Earth's global seawater pH states at the Cryogenian-Ediacaran transition, we present a new boron isotope data set recorded in cap carbonates deposited on the Yangtze Platform in south China and on the Karatau microcontinent in Kazakhstan. Our compiled d11B data reveal similar ocean pH patterns for all investigated cratons and confirm the presence of a global and synchronous ocean acidification event during the Marinoan deglacial period, compatible with elevated postglacial pCO2 concentrations. Differences in the details of the ocean acidification event point to regional distinctions in the buffering capacity of Ediacaran seawater. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.839888 doi:10.1594/PANGAEA.839888 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Relação |
GSA data repository - 2014375 - Assumptions for pH calculations (URI: ftp://rock.geosociety.org/pub/reposit/2014/2014375.pdf) |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Ohnemueller, Frank; Prave, Anthony R; Fallick, Anthony E; Kasemann, Simone A (2014): Ocean acidification in the aftermath of the Marinoan glaciation. Geology, 42(12), 1103-1106, doi:10.1130/G35937.1 |
| Palavras-Chave | #2 Sigma; A: 20.5 per mil d11Bseawater; A: 21.5 per mil d11Bseawater; A: 22.5 per mil d11Bseawater; Al; Aluminium; B; Boron; Ca; Calcium; Center for Marine Environmental Sciences; d11B; d11B std dev; d13C carb; d18O carb; delta 11B; delta 11B, standard deviation; delta 13C, carbonate; delta 18O, carbonate; Event; Fe; Gasbench II (Thermo) coupled to a DELTA V plus IRMS; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Iron; Magnesium; Manganese; MARUM; Mass spectrometer, Thermo Fisher Scietific TRITON Plus (N-TIMS); Mg; Mn; original given in µg/g; pH; S; Sample code/label; SampleLabel; Section; SECTION, height; Si; Silicon; Sr; Strontium; Sulphur, total; vs. VPDB |
| Tipo |
Dataset |
