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Soft-sediment deformation structures related to volcanic earthquakes of the Lower Cretaceous Qingshan Group in Lingshan Island, Shandong Province, East China

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Journal of Palaeogeography 2017年第2期6卷 162-181页

作者： Yao-qi Zhou Tian-Ming Peng Teng-Fei Zhou Zhen--Kai Zhang Hui Tian Wen-Dong Liang Ting Yu Li-Fu Sun School of Geosciences China University of Petroleum(East China)Qingdao 266580China Laboratory of Geochemistry and Lithosphere Dynamics China University of Petroleum(East China)Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science andTechnologyQingdao 266071China Baikouquan Oil Production Plant of Xinjiang Oilfield Company of CNPC Karamay 834000China department of Earth and Environmenta'l Sciences University of Milano-Bicocca"Milano 20126Italy College of Geosciences China University of Petroleum(Beijing)Beijing 102249China College of Geology and Mining Engineering Xinjiang UniversityUrumqi 830046China

The study on soft-sediment deformation structures(SSDS) of Lingshan Island has been one of the hot topics of sedimentology researches in China in recent years,and SSDS developed in turbidite system in the Laiyang Group are widely known by domestic ***,few studies were conducted on the SSDS in fan delta system in the Qingshan Group,Lingshan *** study analyzes the classification and characteristics of SSDS especially their lithofacies association and tithologic characteristics through field outcrops investigation and thin section analysis as well.A conclusion was acquired that the paleoenvironment was a fan delta system with occurrence of several volcanic eruptions,where the water became gradually *** SSDS types in the Qingshan Group includes load and flame structure,ball and pillow structure,waterescape structure,hydroplastic deformation structure,plastic sandstone breccia structure,volcanic drop stone and V-shaped ground fissure mainly caused by volcanic earthquakes of three types:(1)seismic waves,(2)gravity and inertia effect of pyroclastic flows,(3)instant differential air pressure;which is different from slumping and tectonic earthquakes occurred in the Laiyang *** addition,with the lithofacies association analysis between pyroclastic flow and SSDS beds,a distribution model of SSDS related to volcanic earthquakes can be established:SSDS types changed gradually with their distance further away from the volcanic activity *** deformation which was common in the proximal zone disappeared gradually;liquefied and plastic SSDS continued to dominate in the medial zone;and slightly liquefied SSDS were developed in the distal ***,the scale and size of SSDS is negatively correlated with the distance of SSDS depositional locations from the volcanic vent.

关键词： Lingshan Island Qingshan Group Yangjiaodong Section Soft-sediment deformation structures volcanic earthquake Early Cretaceous

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Relationship between earthquake and volcanic eruption inferred from historical records

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Acta Seismologica Sinica(English Edition) 2004年第4期17卷 500-506页

作者： CHEN Hong-zhou(陈洪洲) GAO Feng(高峰) WU Xue-juan(吴雪娟) MENG Xian-sen(孟宪森) earthquake Administration of Heilongjiang Province Harbin 150090 China Earthquake Administration of Heilongjiang Province Harbin 150090 China Research Center for Man Ethnic Group Language Heilongjiang University Harbin 150001 China Earthquake Administration of Heilongjiang Province Harbin 150090 China

A large number of seismic records are discovered for the first time in the historical materials about Wudalianchi volcanic group eruption in 1720~1721, which provides us with abundant volcanic earthquake information. Based on the written records, the relationship between earthquake and volcanic eruption is discussed in the paper. Fur-thermore it is pointed that earthquake swarm is an important indication of volcanic eruption. Therefore, monitoring volcanic earthquakes is of great significance for forecasting volcanic eruption.

关键词： historical record volcanic earthquake volcanic eruption Wudalianchi volcanic group

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Recent Geochemical Variation of the Hot-Spring Gases from the Tianchi Volcano, Changbai Mountains, Northeast China

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earthquake Research in China 2007年第2期21卷 179-188页

作者： Gao Ling Wei Haiquan Shangguan Zhiguan Wu Chengzhi earthquake Administration of Beijing Municipality Beijing 100080 China Institute of Geology China Earthquake Administration Beijing 100029 China Tianchi Volcano Observatory （TVO） of Changbaishan .lilin Antu 133613 China

Recent fluid monitoring work shows that the contents of mantle-derived CO2, He and CH4 increased anomalously in 2002 and 2003. The ^3He/^4He ratio of the deep-fault-type Jinjiang hot springs increased highly anomalously in 2003, and then decreased in 2004. The ^3He/^4He ratio from the thermal-reservoir-type Changbaijulong hot springs increased slowly in 2003, and the increase continued in 2004. The mantle-derived He content of the He released from the Changbaijulong springs increased obviously in 2004. The anomaly of the released gases and the isotopic He was consistent with the trends of seismic activities in the Tianchi volcanic area between 2002 and 2004. The abnormal release of the Jinjiang hot springs apparently decreased after the seismic activities ceased in the second half of 2004, while the abnormal release from the Changbaljulong increased significantly after these seismic activities. It shows that the abnormal release of magmas-derived gases from the thermal-reservoir-type springs lags behind that of the deep-fault-type springs. These characteristics may be of great significance for identifying deep magmatic activity and predicting volcanic earthquakes in the future.

关键词： Changbaishan Tianchi Volcano volcanic earthquake Gas geochemistry

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