首页|期刊导航|中国地震研究（英文版）|The Activity of Major Faults and the Hydrothermal Alteration Zone at Tianchi Volcano of Changbaishan
中国地震研究（英文版）2004，Vol.18Issue(3)：253-262,10.
The Activity of Major Faults and the Hydrothermal Alteration Zone at Tianchi Volcano of Changbaishan
The Activity of Major Faults and the Hydrothermal Alteration Zone at Tianchi Volcano of Changbaishan
摘要
Abstract
It is found by field investigation that the near horizontal top surface of the brown or brick-red hydrothermal alteration zone varies obviously in elevation at different sections of the same layer on the caldera's inner wall of Tianchi, with that at the north section near the Tianwen Peak about 110 m higher than that at the south near the Jiangjun Peak in Korea. The top surface of the hydrothermal alteration zone can be taken as key horizon to tectonic movement. The difference indicates that the total uplift height of the NW wall of the Liudaogou-TianchiJingfengshan fault, the principal fault trending NE at Tianchi, is bigger than that of the SE wall ever since the occurrence of hydrothermal alteration. This also explains why the topography in the northwest side of Tianchi is steeper and with more developed river system than in the southeast. The uplifting of the northeastern wall is bigger than that of the southwest along the principal NW-trend fault, namely, the Baishanzhen-Tianchi-Jince fault. It is observed from characters of hydrothermal alteration and the palaeoresiduum, that the recent vertical movement rate along the principal NE-trend fault is larger than that of the principal NW-trend fault. The two faults intersect at Tianchi, dividing the volcano into 4 blocks, with the uplift magnitudes decreasing successively in the order of the north, the west, the east and the south block. The biggest uplift of the north block corresponds well to the shallow magma batch in the north of Tianchi observed by DSS and telluric electromagnetic sounding, and etc.and they may be related with the causes.关键词
Tianchi volcano/Major fault/Caldera's inner wall/Hydrothermal alteration/Different upliftKey words
Tianchi volcano/Major fault/Caldera's inner wall/Hydrothermal alteration/Different uplift分类
天文与地球科学引用本文复制引用
Liu Mingjun,Gu Menglin,Sun Zhenguo,Wei Haiquan,Jin Bolu..The Activity of Major Faults and the Hydrothermal Alteration Zone at Tianchi Volcano of Changbaishan[J].中国地震研究（英文版）,2004,18(3):253-262,10.基金项目
It is a project on assessment of active volcano hazards in the east Jilin Province under the 10th "Five-Year Plan" of the Ministry of Science and Technology, P.R. China.Contribution No: RCEG200216, Geophysical Exploration Center, CEA. （）
