Identification of the volcanic edifice in continental volcanic areas: A case study of the Dongming resurgent caldera in Xinchang, Zhejiang Province

CHU Pingli; DUAN Zheng; YU Minggang; ZHAO Xilin; ZHU Yanhui; CAO Mingxuan; HE Zhenyu

doi:10.12097/j.issn.1671-2552.2022.2-3.014

2022 Vol. 41, No. 2-3

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CHU Pingli, DUAN Zheng, YU Minggang, ZHAO Xilin, ZHU Yanhui, CAO Mingxuan, HE Zhenyu. Identification of the volcanic edifice in continental volcanic areas: A case study of the Dongming resurgent caldera in Xinchang, Zhejiang Province[J]. Geological Bulletin of China, 2022, 41(2-3): 361-373. doi: 10.12097/j.issn.1671-2552.2022.2-3.014

Citation:

CHU Pingli, DUAN Zheng, YU Minggang, ZHAO Xilin, ZHU Yanhui, CAO Mingxuan, HE Zhenyu. Identification of the volcanic edifice in continental volcanic areas: A case study of the Dongming resurgent caldera in Xinchang, Zhejiang Province[J]. Geological Bulletin of China, 2022, 41(2-3): 361-373. doi: 10.12097/j.issn.1671-2552.2022.2-3.014

Identification of the volcanic edifice in continental volcanic areas: A case study of the Dongming resurgent caldera in Xinchang, Zhejiang Province

1.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
2.
Department of Resources and Environment, Hefei University of Technology, Hefei 230009, Anhui, China
3.
Nanjing Center, China Geological Survey, Nanjing 210016, Jiangsu, China

Received Date: 01 September 2020

Revised Date: 26 January 2022

Publish Date: 15 March 2022

Abstract

Abstract

The identification and anatomy of volcanic edifice is the key of continental volcanic mapping.Taking the Dongming resurgent caldera in Cretaceous Xinchang basin of Zhejiang Province as an example, the investigation method of volcanic edifice in continental volcanic area is discussed.The caldera is centered on the Zhushan-Guozhan-Dajiangang volcanic channel, and the inward-dipping volcano-sedimentary strata are cut by annular and radial faults, with developed dikes.Based on the comprehensive applications of remote sensing interpretation, geophysics, geochemistry and regional geological survey, the types, forms and ranges of volcanic edifice, characteristics of eruptive products and their spatial and temporal distribution patterns have been identified, which can be used as an important means to recover the history of volcanic eruptions and determine the evolution of volcanic edifice.The evolutional history of Dongming resurgent caldera can be divided into four stages: normal sedimentation accompanied with small eruption, major eruption, crater collapse and resurgence.The results show that the determination of volcanic vent, volcanic lithofacies and lithology, the distribution and spatial-temporal variations of eruptive products and ring faults are the key factors to identify the volcanic edifice and recover the volcanic history.
- volcanic edifice /
- resurgent caldera /
- continental volcanic area /
- Xinchang, Zhejiang /
- geological survey engineering

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References

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