Metamorphic records of multiple seismic cycles during subduction

Viete, Daniel R.; Hacker, Bradley R.; Allen, Mark B.; Seward, Gareth; Tobin, Mark J.; Kelley, Chris S.; Cinque, Gianfelice; Duckworth, Andrew R.

doi:10.1126/sciadv.aaq0234

Cited by 51 publications

(44 citation statements)

References 82 publications

(102 reference statements)

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“…As recently suggested by Viete et al. (), these fluid pulses might induce overpressure cycles (drained and undrained conditions), causing pressure fluctuations without changes in depth.…”

Section: Discussionmentioning

confidence: 69%

“…Garnet growth and resorption events might be triggered by fluid pulses (Ague & Axler, 2016;Faryad, Klápová, & Nosál, 2010;Giuntoli et al, 2018). As recently suggested by Viete et al (2018), these fluid pulses might induce overpressure cycles (drained and undrained conditions), causing pressure fluctuations without changes in depth. Given that the phase equilibrium diagram is a simplified qualitative model of a natural process, it is also possible that the apparent pressure reversal is a result of the uncertainties related to the modelling, but the general trend of the P-T path should be reliable (de Capitani & Petrakakis, 2010;Powell & Holland, 2008).…”

Section: Prograde Metamorphismmentioning

confidence: 76%

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Phase equilibrium modelling and implications forP–Tdeterminations of medium‐temperature UHP eclogites, North Qaidam terrane, China

Hernández‐Uribe

Mattinson

Zhang

2018

Journal Metamorphic Geology

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In contrast to low‐T eclogites (garnet growth zoning preserved) or high‐T eclogites (garnet diffusionally homogenized at peak conditions), medium‐temperature eclogites pose additional challenges to P–T determinations due to the partial preservation of garnet zoning. The Dulan area, in the southeastern part of North Qaidam ultrahigh‐pressure terrane, exposes minor eclogites hosted by ortho‐ and paragneisses. Four fresh, medium‐temperature eclogites contain the paragenesis Grt+Omp+Rt+Qz/Coe+Ph±Ky±Zo. In all samples, garnet XMg shows little zoning, suggesting diffusional modification, and precludes the use of pyrope+almandine+grossular isopleth intersections to determine a P–T path. However, in one sample, sharp zoning in grossular content suggests that grossular growth compositions are preserved. Since garnet pyrope+almandine compositions appear to be modified, we instead use the intersections of grossular and garnet volume isopleths to define a prograde P–T path. This approach yields a path from ~17 kbar and ~410°C to ~35 kbar and ~625°C with a gradient of ~5–9°C/km through the lawsonite stability field. Peak P–T conditions determined from the intersection between Si pfu in phengite and Zr‐in‐rutile isopleths are ~26–33 kbar and ~625–700 °C for the four eclogites. These conditions are close to the limit of the lawsonite stability field, suggesting that fluid released from lawsonite breakdown may have promoted re‐equilibration at these conditions. These peak conditions are also in good agreement (within 3 kbar and 50°C) with garnet–omphacite–phengite (±kyanite) thermobarometry in three of the four samples. We regard the phengite–rutile constraints as more reliable, because they are less sensitive to uncertainties associated with ferric iron compared to conventional thermobarometry. Phase equilibrium modelling predicts that the retrograde assemblage of amphibole+zoisite formed at ~60 km. Infiltration of external fluids was likely required for the growth of these hydrous minerals. Based on the comparison of P–T estimation methods applied in this study, we propose that the garnet grossular+volume isopleths can recover the prograde P–T path of medium‐temperature eclogites, and that the combination of phengite+rutile isopleths represents a more robust approach to constrain peak P–T conditions.

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“…As recently suggested by Viete et al. (), these fluid pulses might induce overpressure cycles (drained and undrained conditions), causing pressure fluctuations without changes in depth.…”

Section: Discussionmentioning

confidence: 69%

Section: Prograde Metamorphismmentioning

confidence: 76%

Phase equilibrium modelling and implications forP–Tdeterminations of medium‐temperature UHP eclogites, North Qaidam terrane, China

Hernández‐Uribe

Mattinson

Zhang

2018

Journal Metamorphic Geology

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“…Deformation analysis is unfortunately complicated by the succession of deformation stages and J o u r n a l P r e -p r o o f strain localization in the rheologically weak pelitic layers (Agard et al, 2002). Rapid and incremental growth could result from response to rearrangement of porosity, fluid pressure fluctuations and/or seismic cycles (Fagereng et al, 2011;Viete et al, 2018;Ganzhorn et al, 2019).…”

Section: Different Lawsonite Types and Veins: Nature And Timing Of Crmentioning

confidence: 99%

Massive formation of lawsonite in subducted sediments from the Schistes Lustrés (W. Alps): Implications for mass transfer and decarbonation in cold subduction zones

Lefeuvre

Agard

Verlaguet

et al. 2020

Lithos

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…Short-duration orogenic metamorphism (~1 -10 Myrs) is increasingly recognised in the geological record worldwide (Viete and Lister 2017) and is thought to reflect transient crustal condition rather than geologically prevalent physico-chemical conditions (e.g., Chu et al 2017;Viete et al 2018). The active Taiwan mountain belt is one of the most rapid convergent collisional plate boundaries (~82 mm yr -1 ; Yu et al 1997) with surface uplift rates reaching up to ~23 mm yr -1 (Ching et al 2011), and is a paradigmatic example of a rapidly exhuming orogen (e.g., Willett et al 2003;Hsu et al 2016).…”

Section: Introductionmentioning

confidence: 99%

A Late-Miocene Yuli belt? New constraints on the eastern Central Range depositional ages

Mesalles¹,

Lee²,

Ma³

et al. 2020

Terr. Atmos. Ocean. Sci.

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In Taiwan's Central Range mountains, fundamental constraints on depositional ages and the timing of deformation and metamorphism remain a problematic issue preventing a consensual chronology of orogenic events to be established. In this contribution, we report detrital zircon U-Pb detrital ages for the Chulai Formation, the easternmost strip of metamorphic sediments depositionally overlying the metamorphic, high-pressure Yuli belt. We demonstrate that the maximum depositional age of this unit is 11.2 ± 0.2 Ma (Upper Miocene, Tortonian), making it the youngest pervasively deformed and metamorphosed unit of the Central Range. Detrital zircon ages suggest an almost exclusively continental origin of the sediments similar to the Yuli belt's matrix detrital age zircon spectra. Sedimentary relationships and structural considerations indicate that the Chulai Formation underwent essentially the same deformation history as the underlying Yuli belt, and thus the maximum depositional age of 11.2 ± 0.2 Ma is interpreted as the upper limit for the start of pervasive deformation of the eastern Central Range geological units. When considering the existing geochronological constraints on the metamorphism, we argue that the timing for the Cenozoic metamorphism of the Taiwan orogen is likely to be ~6-8 Ma.

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Metamorphic records of multiple seismic cycles during subduction

Abstract: Garnets record subduction earthquakes.

Cited by 51 publications

References 82 publications

Phase equilibrium modelling and implications forP–Tdeterminations of medium‐temperature UHP eclogites, North Qaidam terrane, China

Phase equilibrium modelling and implications forP–Tdeterminations of medium‐temperature UHP eclogites, North Qaidam terrane, China

Massive formation of lawsonite in subducted sediments from the Schistes Lustrés (W. Alps): Implications for mass transfer and decarbonation in cold subduction zones

A Late-Miocene Yuli belt? New constraints on the eastern Central Range depositional ages

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