東亞地體構造演化整合研究 CREATE (III): 東亞地函動力與板塊互動─青藏高原岩漿活動研究(2/3)
Date Issued
2005
Date
2005
Author(s)
DOI
932116M002005
Abstract
This project is proposed as a 3-year project that, under the NSC integrated project
CREATE-III “Mantle Dynamics and Plate Interactions in East Asia”, would perform a systematic
investigation of selected magmatic rocks from the Lhasa terrane, the southern part of the immense
Tibetan plateau. The collision of India with Asia, which resulted in the Tibetan-Himalayan orogen,
marks the most important plate tectonics event in the Cenozoic Era of the Earth. The Tibetan plateau
that represents the most outstanding natural lab for studying continental collisional orogenesis, and its
impacts on the ocean and climate change, has been the subject of numerous investigations. Thus, a
wide variety of hypotheses have been proposed for the Tibetan-Himalayan tectonic evolution. Our
team started working on the geology of southeastern Lhasa terrane since about two years ago, from
which we made some important new observations that, published or yet, have either never been
reported or mis-interpreted by previous studies. We recently submitted an overview paper that
proposes a new geodymanic evolution model for Tibetan magmatism and tectonism. If this project
can be funded, it would be concentrated in detailed analysis of a few selected outcrops from the
Gangdese batholith, Linzizong volcanic successions, and post-collisional ultrapotassic and adakitic
magma bodies in the Lhasa terrane, southern Tibet. Such a selection is based on our working
experience and primitive results obtained in the past two years. This study will be able to provide
useful information for a comparative study that the proponent has been involved for years, which
explores tectonomagmatic evolution in some older continental collision zones such as the one related to the Triassic collision between the North and South China Blocks.
SDGs
Publisher
臺北市：國立臺灣大學地質科學系暨研究所
Type
report
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