Gangdese magmatism in southern Tibet and India–Asia convergence since 120 Ma
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Published:October 08, 2019
Abstract
A compilation of 290 zircon U–Pb ages of intrusive rocks indicates that the Gangdese Batholith in southern Tibet was emplaced from c. 210 Ma to c. 10 Ma. Two intense magmatic pulses within the batholith occur at: (1) 90 ± 5 Ma, which is restricted to 89–94° E in the eastern segment of the southern Lhasa subterrane; and (2) 50 ± 3 Ma, which is widespread across the entire southern Lhasa subterrane. The latter pulse was followed by a phase of widespread but volumetrically small, dominantly felsic adakitic intrusive rocks at 16 ± 2 Ma. The Linzizong volcanism in...
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Contents
Himalayan Tectonics: A Modern Synthesis
CONTAINS OPEN ACCESS
The Himalaya–Karakoram–Tibet mountain belt resulted from Cenozoic collision of India and Asia and is frequently used as the type example of a continental collision orogenic belt. The last quarter of a century has seen the publication of a remarkably detailed dataset relevant to the evolution of this belt. Detailed fieldwork backed up by state-of-the-art structural analysis, geochemistry, mineral chemistry, igneous and metamorphic petrology, isotope chemistry, sedimentology and geophysics produced a wide-ranging archive of data-rich scientific papers. The rationale for this book is to provide a coherent overview of these datasets in addressing the evolution of the mountain ranges we see today.
This volume comprises 21 specially invited review papers on the Himalaya, Kohistan arc, Tibet, the Karakoram and Pamir ranges. These papers span the history of Himalayan research, chronology of the collision, stratigraphy, magmatic and metamorphic processes, structural geology and tectonics, seismicity, geophysics, and the evolution of the Indian monsoon. This landmark set of papers should underpin the next 25 years of Himalayan research.
GeoRef
- absolute age
- Asia
- buoyancy
- Cenozoic
- China
- continental lithosphere
- Cretaceous
- crustal shortening
- dates
- density
- emplacement
- Eocene
- Far East
- felsic composition
- geodynamics
- igneous rocks
- Jurassic
- Lhasa Block
- lithosphere
- magmatism
- mantle
- mantle plumes
- Mesozoic
- Neotethys
- nesosilicates
- oceanic lithosphere
- orthosilicates
- Paleogene
- plate collision
- plate convergence
- plate tectonics
- rates
- silicates
- slabs
- subduction
- temperature
- Tertiary
- Triassic
- U/Pb
- volcanic rocks
- volcanism
- Xizang China
- zircon
- zircon group
- Gangdese Batholith
- Linzhou Basin
- southern Xizang China
- Shexing Formation
- Maxiang China