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《Journal of Marine Sciences》 2009-02
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Discussion and the scientific significance of IODP drilling to study in the 49°39′E vent field in Southwest Indian Ridge

HUANG Wei1,2,TAO Chun-hui1,DENG Xian-ming1,ZHOU Jian-ping,1SUN Yao1,DOU Bing-jun1,LIU Wei-yong1(1.Second Institute of Oceanography,SOA,Laboratory of Submarine Geosciences,SOA,Hangzhou 310012,China;2.Qingdao Institute of Marine Geology,Qingdao 266071,China)  
Seafloor hydrothermal activity is the one of the most interesting topics in geosciences since the 1970's.The first active hydrothermal vent field in Southwest Indian Ridge(SWIR) was discovered during the leg1 and leg2 of Cruise DY19 aboard our research ship R/V "Da Yang Yi Hao" in March.The research of the seafloor hydrothermal activity has been one of the research purposes of the ocean drilling all the time,but the research level in the Southwest Indian Ridge is rather low.All of the total 2902 holes of the DSDP and the ODP,only 32 holes were drilled in Southwest Indian Ridge.Up till now,in the 175 holes of the IODP,there is no one in this area.So the discovery of the first active hydrothermal vent field in the ultraslow and highly oblique spreading SWIR is an important event for tectonic,geological,hydrothermal,and biological research and it presents a unique environment to carry on drilling by OIDP in this ridge.We suggest carrying on the research of IODP in this area,the ocean drilling can reveal the structural characteristics and the three dimensional distribution of the oceanic crust and the hydrothermal sulfide deposits;gain the interaction relationship of the hydrothermal fluid with the rock,the sediments and the seawater,achieve the new knowledge about hydrothermal circulation,heat and mass flux,mineralization mechanism,evolution and origin history of the metallogenic material and analog to ore deposits present on land;explore the extreme environment microbial communities in the deep earth.The drilling can offer the platform for scientists of our country to understand better,to research the hydrothermal circulation,hydrothermal sediments,vent fauna and other relevant things together and improve the ultraslow spreading ridge and the seafloor hydrothermal activity scientific research level rapidly.
【Fund】: 国际海底区域研究开发“十一五”资助项目(DYXM-115-02-1-01)
【CateGory Index】: P736.1
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