天然气体水合物在地质作用过程中变化的探讨

陈萍; 方念乔

Volume 27 Issue 4

Jul. 2002

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CHEN Ping, FANG Nian-qiao, 2002. Study on Changes of Gas-Hydrate under Various Geological Processes. Earth Science, 27(4): 441-445.

Citation:

CHEN Ping, FANG Nian-qiao, 2002. Study on Changes of Gas-Hydrate under Various Geological Processes. Earth Science, 27(4): 441-445.

CHEN Ping, FANG Nian-qiao, 2002. Study on Changes of Gas-Hydrate under Various Geological Processes. Earth Science, 27(4): 441-445.

Citation:

CHEN Ping, FANG Nian-qiao, 2002. Study on Changes of Gas-Hydrate under Various Geological Processes. Earth Science, 27(4): 441-445.

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Study on Changes of Gas-Hydrate under Various Geological Processes

CHEN Ping^{1, 2
,},
FANG Nian-qiao¹

1.
Marine Institute, China University of Geosciences, Beijing 100083, China
2.
Department of Resource and Env ironment Engineering, A nhui University of Science and Technology, Huainan 232001, China

Received Date: 2002-03-04
Publish Date: 2002-07-25

Abstract

Abstract

Gas hydrates are quasi stable and sensitive for the changes of pt conditions under various geological processes. Deposition or erosion, sea level fluctuation and the exchange of glacier interglacier alter the pt conditions on sea floor, so that affect the formation or dissociation of gas hydrates. Sudden depositing (especially accumulating by submarine sliding and mud volcano erupting), sea level rising and glacier occuring in high latitude usually make the pressure higher and the temperature lower. These are propitious for the formation and existence of gas hydrate; on the contrary, quickly eroding, sea level dropping and removing of ice cover usually cause the dissociation of gas hydrates. The dissociation can take place gradually or explosively, depending on how fast the pressure drops or the temperature increases. The "explosive dissociation" brings a lots of "pockmmarks" on the sea floor. A consequence of frequently varying pt conditions in an area enriches ethane in gas hydrates.
- gas hydrates,
- pt condition change,
- existence,
- dissociation

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References(10)

References

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