Petrogenesis and its significance to continental dynamics of the Neogene high-potassium calc-alkaline volcanic rock association from North Qiangtang, Tibetan Plateau

Lai Shaocong; Liu Chiyang; S. Y. O'Reilly

Petrogenesis and its significance to continental dynamics of the Neogene high-potassium calc-alkaline volcanic rock association from North Qiangtang, Tibetan Plateau

Lai Shaocong^*, Liu Chiyang, S. Y. O'Reilly

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Detailed studies indicate that the main rock type of the Neogene high-potassium calc-alkaline volcanic rock association from north Qiangtang is andesite, dacite and rhyolite. They belong to typical crust-generation magmatic system and originate from the special thickened crust of the Tibetan Plateau by dehydration melting. This group of rocks exhibits LREE enrichment but no remarkable Eu anomaly that shows their source region should be a thickened deep crust consisting of eclogitic mass group, implying that the crust had been thickened and an eclogitic deep crust had been formed during the Neogene period in Qiangtang area. This understanding is important and significant to making further discussion on the uplift mechanism and continental dynamics of the Tibetan Plateau.

Original language	English
Pages (from-to)	45-55
Number of pages	11
Journal	Science in China, Series D: Earth Sciences
Volume	44
Publication status	Published - 2001

Keywords

Deep crust composition
Magma source region feature
Neogene volcanism
North Qiangtang
Petrology and geochemistry

Cite this

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AU - Chiyang, Liu

AU - O'Reilly, S. Y.

PY - 2001

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N2 - Detailed studies indicate that the main rock type of the Neogene high-potassium calc-alkaline volcanic rock association from north Qiangtang is andesite, dacite and rhyolite. They belong to typical crust-generation magmatic system and originate from the special thickened crust of the Tibetan Plateau by dehydration melting. This group of rocks exhibits LREE enrichment but no remarkable Eu anomaly that shows their source region should be a thickened deep crust consisting of eclogitic mass group, implying that the crust had been thickened and an eclogitic deep crust had been formed during the Neogene period in Qiangtang area. This understanding is important and significant to making further discussion on the uplift mechanism and continental dynamics of the Tibetan Plateau.

AB - Detailed studies indicate that the main rock type of the Neogene high-potassium calc-alkaline volcanic rock association from north Qiangtang is andesite, dacite and rhyolite. They belong to typical crust-generation magmatic system and originate from the special thickened crust of the Tibetan Plateau by dehydration melting. This group of rocks exhibits LREE enrichment but no remarkable Eu anomaly that shows their source region should be a thickened deep crust consisting of eclogitic mass group, implying that the crust had been thickened and an eclogitic deep crust had been formed during the Neogene period in Qiangtang area. This understanding is important and significant to making further discussion on the uplift mechanism and continental dynamics of the Tibetan Plateau.

KW - Deep crust composition

KW - Magma source region feature

KW - Neogene volcanism

KW - North Qiangtang

KW - Petrology and geochemistry

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JO - Science in China, Series D: Earth Sciences

JF - Science in China, Series D: Earth Sciences

ER -

Petrogenesis and its significance to continental dynamics of the Neogene high-potassium calc-alkaline volcanic rock association from North Qiangtang, Tibetan Plateau

Abstract

Keywords

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