scholarly journals Supplemental Material: Ultrahigh-temperature granulite-facies metamorphism and exhumation of deep crust in a migmatite dome during late- to post-orogenic collapse and extension in the central Adirondack Highlands (New York, USA)

2021 ◽  
Author(s):  
E.P. Metzger ◽  
et al. ◽  
M.L. Leech
Keyword(s):  
New York ◽  
Granulite Facies ◽  
Granulite Facies Metamorphism ◽  
Deep Crust ◽  
Honestly Significant Difference ◽  
Significant Difference ◽  
Facies Metamorphism ◽  
Text Figure ◽  
Tukey Honestly Significant Difference ◽  
Ultrahigh Temperature

<div>Text S1: Supplemental text. Figure S1: Cathodoluminescence images for all analyzed zircon grains. Figure S2: REE spider plots for zircon. Figure S3: Tukey honestly significant difference (HSD) for the timing of anatexis. Table S1: Cathodoluminescence images for all analyzed zircon grains. Table S2. Grossular content of garnet used to calculate the 95% confidence intervals for isopleth modeling in Figure 13. <br></div>

scholarly journals Supplemental Material: Ultrahigh-temperature granulite-facies metamorphism and exhumation of deep crust in a migmatite dome during late- to post-orogenic collapse and extension in the central Adirondack Highlands (New York, USA)

2021 ◽  
Author(s):  
E.P. Metzger ◽  
et al. ◽  
M.L. Leech
Keyword(s):  
New York ◽  
Granulite Facies ◽  
Granulite Facies Metamorphism ◽  
Deep Crust ◽  
Honestly Significant Difference ◽  
Significant Difference ◽  
Facies Metamorphism ◽  
Text Figure ◽  
Tukey Honestly Significant Difference ◽  
Ultrahigh Temperature

<div>Text S1: Supplemental text. Figure S1: Cathodoluminescence images for all analyzed zircon grains. Figure S2: REE spider plots for zircon. Figure S3: Tukey honestly significant difference (HSD) for the timing of anatexis. Table S1: Cathodoluminescence images for all analyzed zircon grains. Table S2. Grossular content of garnet used to calculate the 95% confidence intervals for isopleth modeling in Figure 13. <br></div>

scholarly journals Supplemental Material: Ultrahigh-temperature granulite-facies metamorphism and exhumation of deep crust in a migmatite dome during late- to post-orogenic collapse and extension in the central Adirondack Highlands (New York, USA)

2021 ◽  
Author(s):  
E.P. Metzger ◽  
et al. ◽  
M.L. Leech
Keyword(s):  
New York ◽  
Granulite Facies ◽  
Granulite Facies Metamorphism ◽  
Deep Crust ◽  
Honestly Significant Difference ◽  
Significant Difference ◽  
Facies Metamorphism ◽  
Text Figure ◽  
Tukey Honestly Significant Difference ◽  
Ultrahigh Temperature

<div>Text S1: Supplemental text. Figure S1: Cathodoluminescence images for all analyzed zircon grains. Figure S2: REE spider plots for zircon. Figure S3: Tukey honestly significant difference (HSD) for the timing of anatexis. Table S1: Cathodoluminescence images for all analyzed zircon grains. Table S2. Grossular content of garnet used to calculate the 95% confidence intervals for isopleth modeling in Figure 13. <br></div>

scholarly journals Ultrahigh-temperature granulite-facies metamorphism and exhumation of deep crust in a migmatite dome during late- to post- orogenic collapse and extension in the central Adirondack Highlands (New York, USA)

Geosphere ◽  
2021 ◽  
Author(s):  
Ellen P. Metzger ◽  
Mary L. Leech ◽  
Michael W. Davis ◽  
Jackson V. Reeder ◽  
Brandon A. Swanson ◽  
...  
Keyword(s):  
New York ◽  
Phase Equilibrium ◽  
Granulite Facies ◽  
Gneiss Dome ◽  
Granulite Facies Metamorphism ◽  
Equilibrium Modeling ◽  
Crustal Rocks ◽  
Ultrahigh Temperature ◽  
Uht Metamorphism ◽  
Shrimp Zircon Geochronology

This study combines field observations, mineral and whole-rock geochemistry, phase equilibrium modeling, and U-Pb sensitive high-resolution ion microprobe (SHRIMP) zircon geochronology to investigate sillimanite-bearing felsic migmatites exposed on Ledge Mountain in the central Adirondack Highlands (New York, USA), part of an extensive belt of mid-crustal rocks comprising the hinterland of the Mesoproterozoic Grenville orogen. Phase equilibrium modeling suggests minimum peak metamorphic conditions of 960–1025 °C and 11–12.5 kbar during the Ottawan orogeny—significantly higher pressure-temperature conditions than previously determined—followed by a period of near-isothermal decompression, then isobaric cooling. Petrography reveals abundant melt-related microstructures, and pseudosection models show the presence of at least ~15%–30% melt during buoyancy-driven exhumation and decompression. New zircon data document late Ottawan (re)crystallization at ca. 1047 ± 5 to 1035 ± 2 Ma following ultrahigh-temperature (UHT) metamorphism and anatexis on the retrograde cooling path. Inherited zircon cores give a mean date of 1136 ± 5 Ma, which suggests derivation of these felsic granulites by partial melting of older igneous rocks. The ferroan, anhydrous character of the granulites is similar to that of the ca. 1050 Ma Lyon Mountain Granite and consistent with origin in a late- to post-Ottawan extensional environment. We present a model for development of a late Ottawan migmatitic gneiss dome in the central Adirondacks that exhumed deep crustal rocks including the Snowy Mountain and Oregon anorthosite massifs with UHT Ledge Mountain migmatites. Recognition of deep crustal meta-plutonic rocks recording UHT metamorphism in a migmatite gneiss dome has significant implications for crustal behavior in this formerly thickened orogen.

scholarly journals Simultaneous P-T-t estimation of ultrahigh-temperature high-pressure granulite facies metamorphism recorded in titanite

2021 ◽  
Author(s):  
Kenta Yoshida ◽  
Sota Niki ◽  
Hikaru Sawada ◽  
Takafumi Hirata ◽  
Kenji Asakura ◽  
...  
Keyword(s):  
High Pressure ◽  
Granulite Facies ◽  
Granulite Facies Metamorphism ◽  
High Pressure Granulite ◽  
Facies Metamorphism ◽  
Ultrahigh Temperature

Thermal perturbation during charnockitization and granulite facies metamorphism in southern India

1995 ◽  
Vol 13 (3) ◽  
pp. 419-430 ◽  
Author(s):  
J. GANGULY ◽  
R. N. SINGH ◽  
D. V. RAMANA
Keyword(s):  
Granulite Facies ◽  
Southern India ◽  
Thermal Perturbation ◽  
Granulite Facies Metamorphism ◽  
Facies Metamorphism
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