Geochemical Characteristics and Genesis of Volcanic Rocks of Yixian Formation in Jianping,Western Liaoning

DOI

10.2991/iccte-17.2017.88How to use a DOI?

Keywords

YixianFormation;Geochemistry; Lithosphere extension;Intra-plate orogenic belt

Abstract

The volcanic rocksdistributed in Pingzhuang-Machang basin of Jianping countryshould belongs to YixianFormation,thevolcanism may be divided into two subcycles.The volcanic rocks mainly consists of rhyolites,trachyte and trachyandesites. The geochemical characteristicsindicate that the volcanic rocks belong to thehigh-K calc-alkalinemagmatic serious. The volcanic rocks are obviously enriched in large ion lithophile element elements (K, Rb, Sr, Zr, Ba, Pb, Li), and depleted inhigh field-strength element(HFSE) (Nb, Ti, P,Th,U,HREE)as well as compatible elements (Co, Ni, Cr, V).The volcanic rocks is rich in LREE. There is a slight negative Euanomaly , no Ce anomaly. A detailed geochemical discrimination of selected elements allowed us to identify that the volcanic rocks of Yixian Formation mainly derived from the partial melting of lower crust materials,but has been contaminated by upper crustal materials during its ascent process in some degree. The volcanic rocks of Yixian volcanic cycle weregenerated in response to lithosphere inhomogeneous extension in thecontinental intraplateorogenic belt. They have the basic characteristics of continental intra-plate volcanic rocks.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yandong Peng
AU  - Qingyue Wang
PY  - 2017/07
DA  - 2017/07
TI  - Geochemical Characteristics and Genesis of Volcanic Rocks of Yixian Formation in Jianping,Western Liaoning
BT  - Proceedings of the 2017 2nd International Conference on Civil, Transportation and Environmental Engineering (ICCTE 2017)
PB  - Atlantis Press
SP  - 501
EP  - 504
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccte-17.2017.88
DO  - 10.2991/iccte-17.2017.88
ID  - Peng2017/07
ER  -