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Kutterolf, Steffen; Liebetrau, Volker; Mörz, Tobias; Freundt, Armin; Hammerich, Thomas; Garbe-Schönberg, Carl-Dieter (2012): Tephrostratigraphy and radiometric dating of authigenic carbonates. PANGAEA, https://doi.org/10.1594/PANGAEA.789040, Supplement to: Kutterolf, S et al. (2008): Lifetime and cyclicity of fluid venting at forearc mound structures determined by tephrostratigraphy and radiometric dating of authigenic carbonates. Geology, 36, 707-710, https://doi.org/10.1130/G24806A.1

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Abstract:
At convergent margins, fluids rise through the forearc in response to consolidation of the upper plate and dewatering of the subducting plate, and produce various cold-seep-related features on the seafloor (mud diapirs, mud mounds). At the Central American forearc, authigenic carbonates precipitated from rising fluids within such structures during active venting while typical mixed-mud sediments were ejected onto the surrounding seafloor where they became intercalated with normal pelagic background sediments, indicating that mud mounds evolved unsteadily through alternating active and inactive phases. Intercalated regional ash layers from Plinian eruptions at the Central American volcanic arc provide time marks that constrain the ages of mud ejection activity. U/Th dating of drill core samples of authigenic carbonate caps of mud mounds yields ages agreeing well with those constrained by ash layers and showing that carbonate caps grow inward rather than outward during active venting.
Both dating approaches show that offshore Nicaragua and Costa Rica (1) active and inactive phases can occur simultaneously at neighboring mounds, (2) mounds along the forearc have individual histories of activity, but there are distinct time intervals when nearly all mounds have been active or inactive, (3) lifetimes of mounds reach several hundred thousand years, and (4) highly active periods last 10-50 k.y. with intervening periods of >10 k.y. of relative quiescence.
Coverage:
Median Latitude: 10.516785 * Median Longitude: -86.353709 * South-bound Latitude: 8.921833 * West-bound Longitude: -87.264833 * North-bound Latitude: 11.279167 * East-bound Longitude: -84.303833
Date/Time Start: 2002-09-02T18:40:00 * Date/Time End: 2005-11-05T10:50:00
Size:
19 datasets

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Datasets listed in this publication series

  1. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): 14C ages of clasts. https://doi.org/10.1594/PANGAEA.782725
  2. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Correlated tephras per mound. https://doi.org/10.1594/PANGAEA.782949
  3. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M54/2_102. https://doi.org/10.1594/PANGAEA.783203
  4. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M54/2_109. https://doi.org/10.1594/PANGAEA.783204
  5. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M54/2_92. https://doi.org/10.1594/PANGAEA.783202
  6. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_115. https://doi.org/10.1594/PANGAEA.783206
  7. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_118. https://doi.org/10.1594/PANGAEA.783207
  8. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_125. https://doi.org/10.1594/PANGAEA.783208
  9. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_126. https://doi.org/10.1594/PANGAEA.783209
  10. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_140. https://doi.org/10.1594/PANGAEA.783211
  11. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_147. https://doi.org/10.1594/PANGAEA.783212
  12. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_161. https://doi.org/10.1594/PANGAEA.783213
  13. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_167. https://doi.org/10.1594/PANGAEA.783214
  14. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_174. https://doi.org/10.1594/PANGAEA.783215
  15. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_178. https://doi.org/10.1594/PANGAEA.783216
  16. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core M66/3a_179. https://doi.org/10.1594/PANGAEA.783217
  17. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Documentation of sediment core SO173/3_40. https://doi.org/10.1594/PANGAEA.783218
  18. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): Origin and ages of marker tephra layers. https://doi.org/10.1594/PANGAEA.782945
  19. Kutterolf, S; Liebetrau, V; Mörz, T et al. (2012): U-series dating of carbonates and decay constants at the Low-Temperature-Isotope-Geo-Chemistry-Lab (LTIGC). https://doi.org/10.1594/PANGAEA.782715