Supplemental Material: Early Eocene high-flux magmatism and concurrent high-temperature metamorphism in the Gangdese belt, southern Tibet

10.1130/gsab.s.12939764.v1 ◽

2020 ◽

Author(s):

Xuxuan Ma ◽

Zuolin Tian ◽

et al.

Keyword(s):

High Temperature ◽

Geochemical Data ◽

Early Eocene ◽

High Flux ◽

Intrusive Complex ◽

Southern Tibet ◽

Plutonic Rocks ◽

High Temperature Metamorphism

These materials include mineral and whole-rock geochemical, zircon U-Pb dating, and monazite U-Th/Pb dating data from the Nymo intrusive complex of the Gangdese belt, as well as the compiled whole-rock geochemical data of early Eocene plutonic rocks from the Gangdese belt, southern Tibet.

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Early Eocene high-flux magmatism and concurrent high-temperature metamorphism in the Gangdese belt, southern Tibet

Geological Society of America Bulletin ◽

10.1130/b35770.1 ◽

2020 ◽

Author(s):

Xuxuan Ma ◽

Zhiqin Xu ◽

Joseph G. Meert ◽

Zuolin Tian ◽

Haibing Li

Keyword(s):

High Temperature ◽

Phase Equilibria ◽

Amphibolite Facies ◽

Early Eocene ◽

High Flux ◽

Intrusive Complex ◽

Southern Tibet ◽

Facies Metamorphism ◽

Ca 50 ◽

Tectonic Features

The Himalayan-Tibetan orogen represents one of the major Cenozoic tectonic features on Earth, and yet considerable debate continues over the timing and sequence of collisional events leading to its formation. In this contribution, we present new field relations, petrology, geochemistry, geochronology, and phase equilibria modeling in the Gangdese belt of southern Tibet in an effort to address Indo-Asian collisional events in the region. These investigations reveal that the dominantly dioritic Nymo intrusive complex was formed at ca. 50−47 Ma. We establish that the Jurassic-aged Bima volcano-sedimentary sequence underwent early Eocene (50−47 Ma) high-temperature (HT) amphibolite-facies metamorphism. Petrology and phase equilibria modeling of garnet-biotite schists in the Bima rocks reveals mineral assemblages of melt + plagioclase + garnet + biotite + magnetite + ilmenite + sillimanite formed under conditions of 5.3−7.5 kbar and 700−800 °C. We contend that the early Eocene Nymo intrusive complex represents part of the ca. 50 Ma high-flux magmatic “flare-up” that triggered the HT amphibolite-facies metamorphism within the overlying plate during Indo-Asian collision. The synchroneity of high-flux magmatism and HT metamorphism in the Gangdese belt roughly coincided with the continuing Indo-Asian collisional process, implying the early Eocene closure of the Neotethys Ocean along the southern margin of the Lhasa terrane.

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Magma mixing origin for the Quxu intrusive complex in southern Tibet: insights into the early Eocene magmatism and geodynamics of the southern Lhasa subterrane

Lithos ◽

10.1016/j.lithos.2019.01.019 ◽

2019 ◽

Vol 328-329 ◽

pp. 14-32 ◽

Cited By ~ 10

Author(s):

Rui-Qiang Wang ◽

Jian-Sheng Qiu ◽

Si-Bin Yu ◽

Lei Lin ◽

Hang Xu

Keyword(s):

Magma Mixing ◽

Early Eocene ◽

Intrusive Complex ◽

Southern Tibet

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Chemical Th–U–total Pb dating by electron microprobe analysis of monazite, xenotime and zircon from the Archean Napier Complex, East Antarctica: evidence for ultra-high-temperature metamorphism at 2400 Ma

Precambrian Research ◽

10.1016/s0301-9268(01)00228-5 ◽

2002 ◽

Vol 114 (3-4) ◽

pp. 249-275 ◽

Cited By ~ 55

Author(s):

Masao Asami ◽

Kazuhiro Suzuki ◽

Edward S Grew

Keyword(s):

High Temperature ◽

Electron Microprobe ◽

Microprobe Analysis ◽

Electron Microprobe Analysis ◽

East Antarctica ◽

High Temperature Metamorphism ◽

Napier Complex ◽

Ultra High Temperature

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Design of a New 45 kWe High-Flux Solar Simulator for High-Temperature Solar Thermal and Thermo-Chemical Research

Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B ◽

10.1115/imece2010-40492 ◽

2010 ◽

Author(s):

Katherine R. Krueger ◽

Jane H. Davidson ◽

Wojciech Lipin´ski

Keyword(s):

High Temperature ◽

Focal Plane ◽

Flux Distribution ◽

Solar Thermal ◽

Optimized Design ◽

High Flux ◽

Chemical Research ◽

Solar Simulator ◽

Peak Flux ◽

The Common

In this paper, we present a systematic procedure to design a solar simulator for high-temperature concentrated solar thermal and thermo-chemical research. The 45 kWe simulator consists of seven identical radiation units of common focus, each comprised of a 6.5 kWe xenon arc lamp close-coupled to a precision reflector in the shape of a truncated ellipsoid. The size and shape of each reflector is optimized by a Monte Carlo ray tracing analysis to achieve multiple design objectives, including high transfer efficiency of radiation from the lamps to the common focal plane and desired flux distribution. Based on the numerical results, the final optimized design will deliver 7.5 kW over a 6-cm diameter circular disc located in the focal plane, with a peak flux approaching 3.7 MW/m2.

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