Interplay of Subduction Tectonics, Sedimentation, and Carbon Cycling

Riedinger, Natascha; Torres, Marta E; Screaton, E.; Solomon, E. A.; Kutterolf, Steffen; Schindlbeck-Belo, Julie; Formolo, Michael J; Lyons, Timothy W.; Vannucchi, Paola

doi:10.1029/2019gc008613

Cited by 11 publications

(10 citation statements)

References 82 publications

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“…The similarities in the profiles are most likely due to the similar responses that V, Mo, and U have to changing redox conditions in the sediments, particularly as related to their cycling with Fe and Mn minerals in these fine-grained deposits. Such behavior has been documented previously at this site (Torres et al, 2014;Riedinger et al, 2019).…”

Section: Site U1378supporting

confidence: 83%

“…In contrast to Site U1378, Site U1379 is characterized by distinct layers of authigenic carbonates as thick as 11 m in Unit II (see the Site U1379 chapter [Vannucchi et al, 2012c]; Riedinger et al, 2019). The formation of these layers is related to the tectonic history in this region.…”

Section: Study Sitesmentioning

confidence: 99%

“…The formation of these layers is related to the tectonic history in this region. Episodes of burial and uplift (e.g., Vannucchi et al, 2013) led to changes in methane flux and subsequent shifting of the sulfate-methane transition (SMT) associated with authigenic carbonate precipitation concurrent with iron sulfide formation (Riedinger et al, 2019).…”

Section: Study Sitesmentioning

confidence: 99%

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Data report: pore water and solid-phase trace element distribution in sediments from IODP Expedition 334 Sites U1378 and U1379

Jones¹,

Riedinger²,

Lyons³

et al. 2021

Proceedings of the IODP

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Section: Site U1378supporting

confidence: 83%

Section: Study Sitesmentioning

confidence: 99%

Section: Study Sitesmentioning

confidence: 99%

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Data report: pore water and solid-phase trace element distribution in sediments from IODP Expedition 334 Sites U1378 and U1379

Jones¹,

Riedinger²,

Lyons³

et al. 2021

Proceedings of the IODP

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“…Ocean drilling indicates ~1 km of uplift of the forearc continental shelf within only ~0.3 My, starting at ∼2±0.2 Ma, which was followed by equally fast subsidence of ∼1.5 km (refs. 4,83,85 ). The rapid vertical motion of the forearc, and retreat of the trench, suggests that the onset of Cocos Ridge subduction caused accelerating compression, followed by outer forearc removal and thinning by basal erosion 4,86 .…”

Section: And Supplementarymentioning

confidence: 99%

Subduction erosion and arc volcanism

Straub

Gómez-Tuena

Vannucchi

2020

Nat Rev Earth Environ

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Tectonic or subduction erosion refers to the removal of upper plate material from the forearc at convergent margins. Subduction erosion has been suggested to represent a major process associated with the transfer of crustal material into the Earth's mantle at subduction zones 1-4. However, few studies have attempted to trace the fate of eroded forearc crust beneath volcanic arcs, where the eroded crust might first emerge after mixing with the upper mantle, owing to the formidable challenge associated with quantifying the rate of subduction erosion and the contribution of eroded crust to arc magmas. In this Review, we summarize the evidence for subduction erosion at convergent margins and show that, through integration of geochemical and geological data in arc settings where critical crustal lithologies can be accessed, quantification of the contribution of eroded forearc crust to arc magmas is possible 5-8. We further emphasize the importance of establishing arc-forearc compositional links, and illustrate the role of arc petrogenetic models for determining whether the eroded forearc crust contributes substantially (that is, greater than a few percent) to the construction of new arc crust in subduction zones 5,9 , or whether it is primarily exported to the deeper mantle. [H1] INTRODUCTION

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“…Those studies greatly advanced understanding of deep fluid sources at subduction zone plate interfaces (e.g. Hensen et al, 2004;Mau et al, 2007;Ranero et al, 2008;Kluesner et al, 2013;Riedinger et al, 2019), and identified a number of seep sites at which deep-sourced fluids might be sampled (e.g. Füri et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Using a Ladder of Seeps With Computer Decision Processes to Explore for and Evaluate Cold Seeps on the Costa Rica Active Margin

et al. 2021

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Natural seeps occur at the seafloor as loci of fluid flow where the flux of chemical compounds into the ocean supports unique biologic communities and provides access to proxy samples of deep subsurface processes. Cold seeps accomplish this with minimal heat flux. While individual expertize is applied to locate seeps, such knowledge is nowhere consolidated in the literature, nor are there explicit approaches for identifying specific seep types to address discrete scientific questions. Moreover, autonomous exploration for seeps lacks any clear framework for efficient seep identification and classification. To address these shortcomings, we developed a Ladder of Seeps applied within new decision-assistance algorithms (Spock) to assist in seep exploration on the Costa Rica margin during the R/V Falkor 181210 cruise in December, 2018. This Ladder of Seeps [derived from analogous astrobiology criteria proposed by Neveu et al. (2018)] was used to help guide human and computer decision processes for ROV mission planning. The Ladder of Seeps provides a methodical query structure to identify what information is required to confirm a seep either: 1) supports seafloor life under extreme conditions, 2) supports that community with active seepage (possible fluid sample), or 3) taps fluids that reflect deep, subsurface geologic processes, but the top rung may be modified to address other scientific questions. Moreover, this framework allows us to identify higher likelihood seep targets based on existing incomplete or easily acquired data, including MBES (Multi-beam echo sounder) water column data. The Ladder of Seeps framework is based on information about the instruments used to collect seep information (e.g., are seeps detectable by the instrument with little chance of false positives?) and contextual criteria about the environment in which the data are collected (e.g., temporal variability of seep flux). Finally, the assembled data are considered in light of a Last-Resort interpretation, which is only satisfied once all other plausible data interpretations are excluded by observation. When coupled with decision-making algorithms that incorporate expert opinion with data acquired during the Costa Rica experiment, the Ladder of Seeps proved useful for identifying seeps with deep-sourced fluids, as evidenced by results of geochemistry analyses performed following the expedition.

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Interplay of Subduction Tectonics, Sedimentation, and Carbon Cycling

Cited by 11 publications

References 82 publications

Data report: pore water and solid-phase trace element distribution in sediments from IODP Expedition 334 Sites U1378 and U1379

Data report: pore water and solid-phase trace element distribution in sediments from IODP Expedition 334 Sites U1378 and U1379

Subduction erosion and arc volcanism

Using a Ladder of Seeps With Computer Decision Processes to Explore for and Evaluate Cold Seeps on the Costa Rica Active Margin

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