The Zedong terrane: a Late Jurassic intra-oceanic magmatic arc within the Yarlung–Tsangpo suture zone, southeastern Tibet

McDermid, I; Aitchison, Jonathan C.; Davis, Aileen M.; Harrison, T. Mark; Grove, Marty

doi:10.1016/s0009-2541(02)00040-2

Cited by 179 publications

(97 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(d) Geological map of the studied area. Ages are given in Ma and the data sources include Murphy et al (1997), Miller et al (2000), McDermid et al (2002), Kapp et al (2003), Schwab et al (2004), Chu et al (2006), Volkmer et al (2007), Wen et al (2008a), Chiu et al (2009), Chung et al (2009), Ji et al (2009a), Zhu et al (2009), Kang et al (2010) Luobadui-Milashan fault (LMF), respectively ( Fig. 1b) (Pan et al, 2006;Zhu et al, 2011).…”

Section: Geologic Background and Petrographymentioning

confidence: 99%

Late Cretaceous crustal growth in the Gangdese area, southern Tibet: Petrological and Sr–Nd–Hf–O isotopic evidence from Zhengga diorite–gabbro

et al. 2013

View full text Add to dashboard Cite

Section: Geologic Background and Petrographymentioning

confidence: 99%

Late Cretaceous crustal growth in the Gangdese area, southern Tibet: Petrological and Sr–Nd–Hf–O isotopic evidence from Zhengga diorite–gabbro

et al. 2013

View full text Add to dashboard Cite

“…These rutile needles within garnet, hornblende and quartz are thought to be formed by The relative probability and frequency plots of the U\Pb ages of detrital magmatic zircon from the marble. Also plotted for comparison, the relative probability diagram of zircon U\Pb ages of the Late Triassic-Eocene Gangdese batholiths and volcanic rocks (in gray) (Chu et al, 2006;Guan et al, 2010Guan et al, , 2011Guo et al, 2011Guo et al, , 2012Ji et al, 2009;Jiang et al, 2012;McDermid et al, 2002;Quidelleur et al, 1997;Wen et al, 2008aWen et al, , 2008bZhang et al, 2007Zhang et al, , 2010bZhu et al, 2008Zhu et al, , 2009aZhu et al, , 2009bZhu et al, , 2011 titanium exsolution during cooling, and suggest that titanium is saturated in these minerals during prograde metamorphism (Adachi et al, 2010;Kawasaki and Osanai, 2008;Thomas et al, 2010;Wark and Watson, 2006).…”

Section: Garnet-bearing Granulitementioning

confidence: 99%

Late Cretaceous (~81Ma) high-temperature metamorphism in the southeastern Lhasa terrane: Implication for the Neo-Tethys ocean ridge subduction

et al. 2013

View full text Add to dashboard Cite

An integrated study of U\Pb zircon dating, geochemical and Sr\Nd\Hf isotopic compositions of garnet-bearing granulite and marble from the granulite-facies domain of the Nyingchi Complex (eastern Himalayan syntaxis) has provided insights into the tectonic evolution of the southern Lhasa terrane. The peak metamorphism of the garnet-bearing granulite is marked by a mineral assemblage of garnet + orthopyroxene + high-Ti amphibole + plagioclase + quartz + rutile. Abundant exsolved rutile needles are observed within amphibole, garnet and quartz. The peak metamorphic temperatures are estimated at 803-924°C. Geochemical data from the garnet-bearing granulites provide evidence for a basaltic protolith that formed in a continental-margin arc setting. Sr\Nd\Hf isotopic compositions indicate that this protolith was sourced from partial melting of a depleted mantle. LA-ICP MS U\Pb zircon dating shows that the protolith age and metamorphic age of the garnet-bearing granulites are 89.3 ± 0.6 Ma and 81.1 ± 0.8 Ma, respectively. The detrital magmatic zircons from the marble yield ages from 86.3 to 167 Ma. The age distribution and Hf isotopic composition (ε Hf (t) = +5.9 to +17.5) of the detrital magmatic zircon in the marble are consistent with the isotopic data of zircons from the Jurassic-Cretaceous Gangdese batholiths, suggesting that the clastic sediments were partially derived from these intrusives or associated volcanic rocks, and deposited in the fore-arc basin of the Gangdese arc. The metamorphic zircons in the marble yield a metamorphic age of 81.4 ± 0.5 Ma. These results show that both the arc magmatic rocks and forearc sedimentary rocks underwent high-temperature (HT) granulite-facies metamorphism at~81 Ma, indicating anomalously high heat input in the forearc region. A range of tectonic observations, including a coeval hiatus in arc magmatism and a period of regional uplift, indicate that HT metamorphism resulted from the subduction of the Neo-Tethys ocean ridge beneath the southern Lhasa terrane during the Late Cretaceous.

show abstract

“…The Zedong terrane (Aitchison et al 2000;McDermid 2002;McDermid et al 2002) crops out between the Lhasa and Indian terranes within the YTSZ, which marks the trace of Neotethys. Fragments of one or more ancient submarine volcanic edifices are preserved within the terrane.…”

Section: Geological Settingmentioning

confidence: 99%

“…The geology of this area has been mapped in detail (Badengzhu 1979;McDermid 2002), with various aspects having been discussed further by different authors (Yin et al 1999;Harrison et al 2000; Aitchison et al 2003). Detailed mapping permits the recognition of a distinctive stratigraphy (McDermid 2002;McDermid et al 2002) with an overturned succession that includes mostly igneous rocks together with volumetrically subordinate sedimentary lithologies, such as chert, limestone blocks, tuffs, crystal-rich sandstones and mudstones, red siltstones, and volcaniclastic sandstones. Volcanic breccias, most of which are autoclastic, dominate the terrane, and the total preserved stratigraphic thickness locally approaches 1500 m. The terrane is bounded by south-dipping faults.…”

Section: Geological Settingmentioning

confidence: 99%

Shoshonites in Southern Tibet Record Late Jurassic Rifting of a Tethyan Intraoceanic Island Arc

Aitchison¹,

McDermid²,

Ali³

et al. 2007

The Journal of Geology

View full text Add to dashboard Cite

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. A B S T R A C TDetailed field mapping combined with a petrologic and geochemical investigation of the Zedong terrane within the Yarlung Tsangpo suture zone provides insights to the evolution of now mostly subducted portions of Tethys during the Late Jurassic. The terrane is dominated by volcanic rocks of shoshonitic affinity, which were erupted in a submarine oceanic island arc setting. The volcanic island arc was built on a basement of oceanic crust, and the shoshonites locally overlie a thin section of pillowed island arc tholeiites and red ribbon-bedded radiolarian cherts. Geochemistry of the shoshonites suggests that their development occurred in a setting analogous to that of Late Miocene to Early Pliocene Fiji and was associated with an arc rifting. We speculate that this event may have been a far-field response to developments associated with Gondwana breakup.

show abstract

The Zedong terrane: a Late Jurassic intra-oceanic magmatic arc within the Yarlung–Tsangpo suture zone, southeastern Tibet

Cited by 179 publications

References 19 publications

Late Cretaceous crustal growth in the Gangdese area, southern Tibet: Petrological and Sr–Nd–Hf–O isotopic evidence from Zhengga diorite–gabbro

Late Cretaceous crustal growth in the Gangdese area, southern Tibet: Petrological and Sr–Nd–Hf–O isotopic evidence from Zhengga diorite–gabbro

Late Cretaceous (~81Ma) high-temperature metamorphism in the southeastern Lhasa terrane: Implication for the Neo-Tethys ocean ridge subduction

Shoshonites in Southern Tibet Record Late Jurassic Rifting of a Tethyan Intraoceanic Island Arc

Contact Info

Product

Resources

About