2020
DOI: 10.1029/2019jb019119
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Prolonged Partial Melting of Garnet Amphibolite from the Eastern Himalayan Syntaxis: Implications for the Tectonic Evolution of Large Hot Orogens

Abstract: The Himalayan orogen, which formed due to collision of the Indian and Asian continents during the Early Tertiary, is a prime example of a large, hot collisional orogen. Despite decades of study, the duration of partial melting of migmatitic rocks exposed in the Himalayan orogenic core remains highly controversial. As such, we have performed detailed petrological and geochronological analyses of garnet amphibolite from the eastern Himalayan syntaxis in order to reveal the thermal conditions, tectonometamorphic … Show more

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Cited by 20 publications
(13 citation statements)
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References 125 publications
(222 reference statements)
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“…The temperature is estimated with an amphibole-plagioclase geobarometer (Holland and Blundy, 1994). The estimated equilibrium pressure (~1 ± 0.05 GPa) and temperatures (696 ± 20 • C, 630 ± 18 • C, and 567 ± 11 • C) of the three EHS samples are similar to those proposed for the retrogression stage (M3) of the EHS garnet amphibolites (Kang et al, 2020). The temperature of 16lzwx3 may be underestimated because the plagioclase was formed by retrogression of garnet.…”
Section: Mineral Compositionmentioning
confidence: 52%
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“…The temperature is estimated with an amphibole-plagioclase geobarometer (Holland and Blundy, 1994). The estimated equilibrium pressure (~1 ± 0.05 GPa) and temperatures (696 ± 20 • C, 630 ± 18 • C, and 567 ± 11 • C) of the three EHS samples are similar to those proposed for the retrogression stage (M3) of the EHS garnet amphibolites (Kang et al, 2020). The temperature of 16lzwx3 may be underestimated because the plagioclase was formed by retrogression of garnet.…”
Section: Mineral Compositionmentioning
confidence: 52%
“…The EHS includes three major tectonic units: the Lhasa terrane, representing the southern segment of the Asian continent; the ITS, forming the residual of the Neo-Tethyan Ocean between the Asian and Indian plates; and the Himalayan sequences, representing the northern margin of the Indian continent (Yin and Harrison, 2000). The Higher Himalayan Crystalline (HHC) unit, locally referred to as the Namche Barwa Complex (NBC), mainly consists of high-grade gneiss, amphibolite, schist, marble, granulite, and migmatite, and is interpreted as an exhumed middle-lower crust, which has been subjected to extensive partial melting (Kang et al, 2020). Amphibolite occurs interlayered with schist and gneiss and usually shows clear deformation structures (foliation and lineation).…”
Section: Geological Setting and Samplesmentioning
confidence: 99%
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“…Summary of reported metamorphic ages from the NBC. The reported ages are from Burg et al, 1997, 1998; Ding et al, 2001; Booth et al, 2004; Booth et al, 2009; Gong et al, 2008; Seward & Burg, 2008; Lei et al, 2008; Xu et al, 2010; Zhang et al, 2010; Liu et al, 2011; Yu et al, 2011; Su et al, 2012; Zeng et al, 2012; Zhang et al, 2012; Xu et al, 2012; Zeitler et al, 2014; Liu & Zhang, 2014; Tian et al, 2016; Peng et al, 2018; Zhang et al, 2018; Kang et al, 2020…”
Section: Discussionmentioning
confidence: 99%