| The CO2 Discharge in the Boundary Fault Areas of the Sichuan-Yunnan Block and Its Sources |
| |
| 作者姓名： | Shangguan Zhiguan Liu Guifen and Gao SongshengInstitute of Geology SSB Beijing China |
| |
| 作者单位： | Shangguan Zhiguan，Liu Guifen and Gao SongshengInstitute of Geology，SSB，Beijing 100029，China |
| |
| 摘 要： | A large number of CO2 springs outcrop along the boundary faults of the Sichuan-Yunnan block and in their neighboring areas.These springs are of a roughly similar distribution as the epicenters of strong earthquakes since 1900.This similarity indicates that the CO2 discharges could be directly related to the modern seismic activity in that area.The evidences of stable carbon and oxygen isotopes indicate that an overwhelming majority of the CO2 released from modern active faults is derived from the deep earth crust.There are 2 main mechanisms of CO2 discharge.Modern active faults are able both to produce directly a lot of CO2 due to thermodynamic metamorphism and to provide passages for the CO2 constituent coming from the lower crust or upper mantle.By continuously monitoring the dynamic changes of CO2 discharges,it would be possible to obtain the information of earthquake precursors that reflect the physical and chemical changes of the earthquake sources.
|
The CO2 Discharge in the Boundary Fault Areas of the Sichuan-Yunnan Block and Its Sources |
| |
| Shangguan Zhiguan,Liu Guifen and Gao SongshengInstitute of Geology,SSB,Beijing ,China.The CO2 Discharge in the Boundary Fault Areas of the Sichuan-Yunnan Block and Its Sources[J].Earthquake Research in China,1995(2). |
| |
| Authors: | Shangguan Zhiguan Liu Guifen and Gao SongshengInstitute of Geology SSB Beijing China |
| |
| Institution: | Shangguan Zhiguan,Liu Guifen and Gao SongshengInstitute of Geology,SSB,Beijing 100029,China |
| |
| Abstract: | A large number of CO2 springs outcrop along the boundary faults of the Sichuan-Yunnan block and in their neighboring areas.These springs are of a roughly similar distribution as the epicenters of strong earthquakes since 1900.This similarity indicates that the CO2 discharges could be directly related to the modern seismic activity in that area.The evidences of stable carbon and oxygen isotopes indicate that an overwhelming majority of the CO2 released from modern active faults is derived from the deep earth crust.There are 2 main mechanisms of CO2 discharge.Modern active faults are able both to produce directly a lot of CO2 due to thermodynamic metamorphism and to provide passages for the CO2 constituent coming from the lower crust or upper mantle.By continuously monitoring the dynamic changes of CO2 discharges,it would be possible to obtain the information of earthquake precursors that reflect the physical and chemical changes of the earthquake sources. |
| |
| Keywords: | Yunnan Western part of Sichuan Hydrochemistry CO2 discharge |
| 本文献已被 CNKI 等数据库收录！ |
