TY - JOUR
T1 - Constraining the Timing and Amplitude of Early Serpukhovian Glacioeustasy With a Continuous Carbonate Record in Northern Spain
AU - Campion, Alison
AU - Maloof, Adam C.
AU - Schoene, Blair
AU - Oleynik, Sergey
AU - Sanz-López, Javier
AU - Blanco-Ferrera, Silvia
AU - Merino-Tomé, Oscar
AU - Bahamonde, Juan Ramón
AU - Fernández, Luis Pedro
N1 - Funding Information:
Funding for this study was provided for two years of senior thesis research by funding agencies at Princeton University, including the Princeton Environmental Institute, the Smith- Newton Family, ODOC, and the Geoscience Department at Princeton. Project CGL2013-44458-P of the Ministerio de Ciencia y Tecnología of Spain and FEDER funding from the European Community also contributed. JS-L and SB-F benefited from support via the project CGL2016- 78738 of the Spanish Ministerio de Economía y Competitividad. This work was made possible by Blake Dyer’s previous work, support, and guidance. Thanks to Jas Raczinski for assistance in the field and Artemis Eeyster, Ari Zuaro, Sam Gwizd, and Alex Hager for preparing samples for stable isotope analysis. Kyle Samperton managed the lab work for all the zircon analyses. CAID-TIMS U-Pb data are available in the supporting information file online. Code and data used to construct the age model and produce Figure 3, including the new and compiled δ13C data used in this study, are available at https://github.com/alison-campion/ biostrat-age-model.
Funding Information:
Funding for this study was provided for two years of senior thesis research by funding agencies at Princeton University, including the Princeton Environmental Institute, the Smith-Newton Family, ODOC, and the Geoscience Department at Princeton. Project CGL2013-44458-P of the Ministerio de Ciencia y Tecnolog?a of Spain and FEDER funding from the European Community also contributed. JS-L and SB-F benefited from support via the project CGL2016-78738 of the Spanish Ministerio de Econom?a y Competitividad. This work was made possible by Blake Dyer's previous work, support, and guidance. Thanks to Jas Raczinski for assistance in the field and Artemis Eeyster, Ari Zuaro, Sam Gwizd, and Alex Hager for preparing samples for stable isotope analysis. Kyle Samperton managed the lab work for all the zircon analyses. CA-ID-TIMS U-Pb data are available in the supporting information file online. Code and data used to construct the age model and produce Figure, including the new and compiled ?13C data used in this study, are available at https://github.com/alison-campion/biostrat-age-model.
Publisher Copyright:
©2018. American Geophysical Union. All Rights Reserved.
PY - 2018/8
Y1 - 2018/8
N2 - During the Late Paleozoic Ice Age (LPIA, 345–260 Ma), an expansion of ice house conditions at ∼330 Ma caused a nearly synchronous, global unconformity. Subaerially exposed paleotropical carbonates were dissolved by meteoric waters, mixed with the light terrestrial carbon, and recrystallized with overprinted, diagenetic δ13C values. In Northern Spain, development of a rapidly subsiding foreland basin kept local sea level relatively high, allowing continuous carbonate deposition to record δ13C without meteoric overprint. The Spanish sections show a 2‰ increase in δ13C that can be modeled as the ocean's response to the creation of a significant light carbon sink through widespread meteoric diagenesis of marine carbonates during the near-global hiatus. About 15–35 m of sea level fall would have exposed a large enough volume of carbonate to account for the positive excursion in δ13C of oceanic DIC. Combining the δ13C data with high resolution biostratigraphy and new ID-TIMS U-Pb zircon ages from interbedded tuffs, we calculate that the depositional hiatus and glacioeustatic fall caused by the early Serpukhovian phase of ice growth lasted for approximately 3.5 My.
AB - During the Late Paleozoic Ice Age (LPIA, 345–260 Ma), an expansion of ice house conditions at ∼330 Ma caused a nearly synchronous, global unconformity. Subaerially exposed paleotropical carbonates were dissolved by meteoric waters, mixed with the light terrestrial carbon, and recrystallized with overprinted, diagenetic δ13C values. In Northern Spain, development of a rapidly subsiding foreland basin kept local sea level relatively high, allowing continuous carbonate deposition to record δ13C without meteoric overprint. The Spanish sections show a 2‰ increase in δ13C that can be modeled as the ocean's response to the creation of a significant light carbon sink through widespread meteoric diagenesis of marine carbonates during the near-global hiatus. About 15–35 m of sea level fall would have exposed a large enough volume of carbonate to account for the positive excursion in δ13C of oceanic DIC. Combining the δ13C data with high resolution biostratigraphy and new ID-TIMS U-Pb zircon ages from interbedded tuffs, we calculate that the depositional hiatus and glacioeustatic fall caused by the early Serpukhovian phase of ice growth lasted for approximately 3.5 My.
KW - CA-ID-TIMS U-Pb analyses
KW - Cantabrian Zone
KW - Carboniferous
KW - Glacioeustasy
KW - Late Paleozoic Ice Age
KW - meteoric diagenesis
UR - http://www.scopus.com/inward/record.url?scp=85052395059&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85052395059&partnerID=8YFLogxK
U2 - 10.1029/2017GC007369
DO - 10.1029/2017GC007369
M3 - Article
AN - SCOPUS:85052395059
SN - 1525-2027
VL - 19
SP - 2647
EP - 2660
JO - Geochemistry, Geophysics, Geosystems
JF - Geochemistry, Geophysics, Geosystems
IS - 8
ER -