GEOCHEMISTRY AND GENESIS OF BASIC-INTERMEDIATE VOLCANIC ROCKS FROM KALADAWAN, EAST ALTUN TAGH MOUNTAINS

CUI Ling-ling; CHEN Bai-lin; YANG Nong; CHEN Zheng-le; DING Wen-jun

Volume 16 Issue 1

Mar. 2010

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Article Navigation > Journal of Geomechanics > 2010 > 16(1): 96-107

CUI Ling-ling, CHEN Bai-lin, YANG Nong, et al., 2010. GEOCHEMISTRY AND GENESIS OF BASIC-INTERMEDIATE VOLCANIC ROCKS FROM KALADAWAN, EAST ALTUN TAGH MOUNTAINS. Journal of Geomechanics, 16 (1): 96-107.

Citation:

CUI Ling-ling, CHEN Bai-lin, YANG Nong, et al., 2010. GEOCHEMISTRY AND GENESIS OF BASIC-INTERMEDIATE VOLCANIC ROCKS FROM KALADAWAN, EAST ALTUN TAGH MOUNTAINS. Journal of Geomechanics, 16 (1): 96-107.

Citation:

CUI Ling-ling, CHEN Bai-lin, YANG Nong, et al., 2010. GEOCHEMISTRY AND GENESIS OF BASIC-INTERMEDIATE VOLCANIC ROCKS FROM KALADAWAN, EAST ALTUN TAGH MOUNTAINS. Journal of Geomechanics, 16 (1): 96-107.

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GEOCHEMISTRY AND GENESIS OF BASIC-INTERMEDIATE VOLCANIC ROCKS FROM KALADAWAN, EAST ALTUN TAGH MOUNTAINS

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
School of Earth Science and Resource, China University of Geosciences, Beijing 100083, China

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Received: 2009-12-27
Published: 2010-03-01

Abstract

Abstract

The Kaladawan area at eastern part of the Altyn Tagh Mountain is tectonically situated between the NE-trending Altyn Tagh strike-slip fault and the W-E-trending Northern Altyn Tagh margin fault. In the area, there appears a set of volcanic-sedimentary rocks. A geochemical study has been made on the basic-intermediate volcanic rocks. The results show two REE patterns: slight LREE-enrichment pattern and a partly flat pattern, indicating an island-arc origin. The Zr/Nb, Nb/Ta and Zr/Hf values indicates that the volcanic rocks have withstood a contamination with the crustal materials. The La-La/Sm diagram of the volcanic rocks displays a coexistence of partial melting and fractional crystallization. In the Hf-Tu-Ta and FeO-Na₂O + K₂O-Mg diagrams, it can be seen that the volcanic rocks of the study area belong to tholeiite-series volcanic-arc basalts. It is suggested that the volcanic rocks were formed in an island-arc environment in the upper wall of subduction zone in the early Paleozoic, with the basalts mainly derived from the mantle.
- Kaladawan,
- volcanic rock,
- geochemistry,
- tectonic setting

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References(34)

References

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GEOCHEMISTRY AND GENESIS OF BASIC-INTERMEDIATE VOLCANIC ROCKS FROM KALADAWAN, EAST ALTUN TAGH MOUNTAINS

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