A new record of deeper and colder subduction in the Acatlán complex, Mexico: Evidence from phase equilibrium modelling and Zr-in-rutile thermometry

Hernández‐Uribe, David; Gutiérrez-Aguilar, Fabián; Mattinson, Chris G.; Palin, Richard M.; Neill, Owen K.

doi:10.1016/j.lithos.2018.10.003

Cited by 12 publications

(22 citation statements)

References 102 publications

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“…By working backward, the P-T conditions can be refined by; for example, comparing measured versus predicted mineral compositions and proportions within a calculated field of interest (Powell & Holland, 2008. Examples in the literature applying phase equilibrium modeling to do thermobarometrical calculations are vast (Baziotis et al, 2017;Cao et al, 2019;Dragovic et al, 2020;Groppo et al, 2015;Guevara et al, 2017;Gutiérrez-Aguilar et al, 2021;Hern andez-Uribe et al, 2019;Klonowska et al, 2017;Li et al, 2020;Massonne, 2015;Palin et al, 2012;Štípsk a & Powell, 2005;St-Onge et al, 2013;Wei et al, 2013;Weller et al, 2015; among many others). In the case of forward modeling, petrological calculations can be performed along a sequence of P-T points to determine paragenesis along a given P-T-X path.…”

Section: Introductionmentioning

confidence: 99%

The versatility of petrological modeling: Thermobarometry of high‐pressure metabasites from the Renge and Sanbagawa belts and phase evolution during warm subduction at Nankai

Hernández‐Uribe

Gutiérrez-Aguilar

2021

Island Arc

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Petrological modeling is a powerful technique to address different types of geological problems via phase-equilibria predictions at different pressure-temperature-composition conditions. Here, we show the versatility of this technique by (1) performing thermobarometrical calculations using phase equilibrium diagrams to explore the petrological evolution of high-pressure (HP) metabasites from the Renge and Sanbagawa belts, Japan and (2) forward-modeling the mineral-melt evolution of the subducted fresh and altered oceanic crust along the Nankai subduction zone geotherm at the Kii peninsula, Japan. In the first case, we selected three representative samples from these metamorphic belts: a glaucophane eclogite and a garnet glaucophane schist from the Renge belt (Omi area) and a quartz eclogite from the Sanbagawa belt (Besshi area). We calculated the peak metamorphic conditions at 2.0-2.3 GPa and 550-630 C for the HP metabasites from the Renge belt, whereas for the quartz eclogite, the peak equilibrium conditions were calculated at 2.5-2.8 GPa and 640-750 C.According to our models, the quartz eclogite experienced partial melting after peak metamorphism. In terms of the petrological evolution of the subducted uppermost portion of the oceanic crust along the warm Nankai geotherm, our models show that fluid release occurs at 20-60 km, likely promoting high pore-fluid pressure, and thus, seismicity at these depths; dehydration is controlled by chlorite breakdown.Our petrological models predict partial melting at >60 km, mainly driven by phengite and amphibole breakdown. According to our models, the melt proportion is relatively small, suggesting that slab anatexis is not an efficient mechanism for generating voluminous magmatism at these conditions. Modeled melt compositions correspond to high-SiO 2 adakites; these are similar to compositions found in the Daisen and Sambe volcanoes, in southwest Japan, suggesting that the modeled melts may serve as an analog to explain adakite petrogenesis.

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Section: Introductionmentioning

confidence: 99%

The versatility of petrological modeling: Thermobarometry of high‐pressure metabasites from the Renge and Sanbagawa belts and phase evolution during warm subduction at Nankai

Hernández‐Uribe

Gutiérrez-Aguilar

2021

Island Arc

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“…Many previous studies have applied thermodynamic modeling programs to metabasites using the internally consistent thermodynamic database (e.g., Helgeson et al 1978;Berman 1988;Holland and Powell 1998) and various a-X relations (e.g., Berman 1990;Holland and Powell 1996;Meyre et al 1997;Dale et al 2000Dale et al , 2005Diener et al 2007;Green et al 2007;White et al 2007) to model phase equilibrium and estimate P-T conditions during prograde metamorphism (Konrad-Schmolke et al 2008;St-Onge et al 2013;Hernández-Uribe et al 2018, 2019. In some cases, studies modeling metabasites (Konrad-Schmolke et al 2008;St-Onge et al 2013;Imayama 2014;Hernández-Uribe et al 2019) used a-X relations that were developed originally for modeling felsic rocks (White et al 2007), omitted minor components (e.g., Mn, and Ti), or were not calibrated for ultra-high pressure (UHP) conditions. Updated versions of these modeling programs, internally consistent thermodynamic databases (e.g., ds 62; Holland and Powell 2011), and a-X relations (Diener and Powell 2012;White et al 2014aWhite et al , 2014bGreen et al 2016), offer improvements that may yield better results in terms of interpreting phase relations for minerals with a large group of endmembers (e.g., amphibole and clinopyroxene) and calculating phase stabilities using an expanded library of bulk components (e.g., Mn, Ti, and Fe 3+ ).…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic modeling of high-grade metabasites: a case study using the Tso Morari UHP eclogite

Pan

Macris

Menold

2020

Contrib Mineral Petrol

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Highlights1. Eclogite from the Tso Morari UHP terrane is used as a representative metabasite to test the efficacy of various thermodynamic modeling protocols.2. User's choice of modeling program, version, and thermodynamic database, have little effect on the model's outcome in terms of predicted stable mineral assemblage and P-T path. However, the choice of garnet solution model can have a significant effect on pressure predictions.3. Bulk compositions measured by XRF do not represent the reactant or effective bulk composition at the time of garnet nucleation and throughout garnet prograde growth.Taking into account calculations of the effective bulk composition of the system _______________________________________________

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“…This is exemplified by the wide range of estimated peak pressures reported for eclogite xenoliths (~27–50 kbar) 31–33 , which necessarily must have been exhumed from the same paleo-slab top due to their spatially restricted occurrence in the northwestern NVF. However, over the past decade, petrological phase equilibrium modeling has become the preferred technique with which to perform reliable forward and inverse modeling of subduction zone processes 49,50 as it employs a multi-equilibrium approach combining internally consistent thermodynamic data and more geologically realistic a – x relations for minerals with solid solutions. The peak P – T conditions obtained here using this technique (~35–37 kbar and ~615–625 °C; Fig.…”

Section: Discussionmentioning

confidence: 99%

Catastrophic shear-removal of subcontinental lithospheric mantle beneath the Colorado Plateau by the subducted Farallon slab

Hernández‐Uribe

Palin

2019

Sci Rep

Self Cite

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The causes of Cenozoic uplift of the Colorado Plateau, southwestern USA, are strongly debated, though most hypotheses acknowledge the importance of northwest-directed subduction of the Farallon oceanic plate beneath North America since c. 100 Ma. Existing thermomechanical models suggest that the Farallon slab underthrust the proto-plateau region at ~200 km depth, removing the basal portions of its subcontinental lithospheric mantle (SCLM) root, although such small-volume subduction erosion cannot fully account for the degree of uplift observed today. Here we show via petrological modeling of lawsonite-bearing eclogite xenoliths exposed in diatremes in the center of the plateau that the Farallon slab surface penetrated through the proto-plateau SCLM at much shallower depths (~120 km) than these previous estimates, allowing shear-removal of ~80 km of SCLM – a volume up to three-times greater than previously suggested. This removal led to asthenospheric upwelling and isostatic rebound of the plateau region during the late Cretaceous to the Eocene. We posit that similar shear-removal of SCLM likely played a major role in inhibiting cratonic growth and stabilization in the Neoarchean and Paleoproterozoic – when low-angle subduction of oceanic lithosphere was more prevalent than today – accounting for the atypically thin roots existing below many ancient cratons worldwide.

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A new record of deeper and colder subduction in the Acatlán complex, Mexico: Evidence from phase equilibrium modelling and Zr-in-rutile thermometry

Cited by 12 publications

References 102 publications

The versatility of petrological modeling: Thermobarometry of high‐pressure metabasites from the Renge and Sanbagawa belts and phase evolution during warm subduction at Nankai

The versatility of petrological modeling: Thermobarometry of high‐pressure metabasites from the Renge and Sanbagawa belts and phase evolution during warm subduction at Nankai

Thermodynamic modeling of high-grade metabasites: a case study using the Tso Morari UHP eclogite

Catastrophic shear-removal of subcontinental lithospheric mantle beneath the Colorado Plateau by the subducted Farallon slab

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