dc.contributor.author	Schrank, CE	en_AU
dc.contributor.author	Jones, MMW	en_AU
dc.contributor.author	Kewish, CM	en_AU
dc.contributor.author	van Riessen, GA	en_AU
dc.contributor.author	Elphick, KE	en_AU
dc.contributor.author	Sloss, CR	en_AU
dc.contributor.author	Nothdurft, LD	en_AU
dc.contributor.author	Webb, GE	en_AU
dc.contributor.author	Paterson, DJ	en_AU
dc.contributor.author	Regenauer-Lieb, K	en_AU
dc.date.accessioned	2024-12-05T20:54:43Z	en_AU
dc.date.available	2024-12-05T20:54:43Z	en_AU
dc.date.issued	2021-08-27	en_AU
dc.date.statistics	2024-09-18	en_AU
dc.description.abstract	Measuring the amount of carbon captured in deep-sea limestones is fundamental to understanding the long-term carbon cycle because pelagic limestones represent Earth’s largest carbon sink since the mid-Mesozoic. However, their contribution to the long-term carbon cycle is poorly quantified. Here, we use X-ray fluorescence and scanning X-ray diffraction microscopy for high-resolution chemical and structural analysis of pelagic limestone from the Paleocene Kaiwhata Formation in New Zealand. We identify densely packed diagenetic micro-dissolution seams that are invisible to light and electron-beam microscopes in most cases. Mass-balance calculations indicate that individual seams remove ~50% of the calcite mud matrix while their bulk-sample carbon loss adds up to ~10%. The liberated carbon is trapped in situ as calcite cement or returned to the ocean during physical compaction or soft-sediment deformation. We suggest micro-dissolution structures may play an important role in the long-term carbon cycle by modulating carbon exchange between the geosphere and hydrosphere. © 2024 The Authors - Open Access - CC-BY 4.0	en_AU
dc.description.sponsorship	This research was undertaken on the XFM beamline at the Australian Synchrotron, part of ANSTO. The authors gratefully acknowledge funding by the Australian Research Council through Discovery grant DP170104550. We are deeply thankful to the Cameron family for access to their land and their warm hospitality at Pahaoa, New Zealand. Donald McAuley and Gus Luthje are thanked for sample preparation. We acknowledge the Central Analytical Facility of the Queensland University of Technology for their support with light and scanning-electron microscopy. Computational resources and services used in this work were provided by the eResearch Office of the Queensland University of Technology.	en_AU
dc.identifier.articlenumber	174	en_AU
dc.identifier.citation	Schrank, C. E., Jones, M. M. W., Kewish, C. M., van Riessen, G. A., Elphick, K. E., Sloss, C. R., Nothdurft, L. D., Webb, G. E., Paterson, D. J., & Regenauer-Lieb, K. (2021). Micro-scale dissolution seams mobilise carbon in deep-sea limestones. Communications Earth & Environment, 2(1), 174. doi:10.1038/s43247-021-00257-w	en_AU
dc.identifier.issn	2662-4435	en_AU
dc.identifier.issue	1	en_AU
dc.identifier.journaltitle	Communications Earth & Environment	en_AU
dc.identifier.uri	https://doi.org/10.1038/s43247-021-00257-w	en_AU
dc.identifier.uri	https://apo.ansto.gov.au/handle/10238/15775	en_AU
dc.identifier.volume	2	en_AU
dc.language	English	en_AU
dc.language.iso	en	en_AU
dc.publisher	Springer Nature	en_AU
dc.subject	Carbon	en_AU
dc.subject	Limestone	en_AU
dc.subject	Sea bed	en_AU
dc.subject	Dissolution	en_AU
dc.subject	Carbon cycle	en_AU
dc.subject	Fluorescence	en_AU
dc.subject	Microscopy	en_AU
dc.subject	Structural chemical analysis	en_AU
dc.subject	Electron microscopes	en_AU
dc.subject	Hydrosphere	en_AU
dc.title	Micro-scale dissolution seams mobilise carbon in deep-sea limestones	en_AU
dc.type	Journal Article	en_AU

Micro-scale dissolution seams mobilise carbon in deep-sea limestones

Files

Original bundle

License bundle

Collections