Existing states of copper in the hydrothermal activity area of the Middle Okinawa Trough  

作　　者：GAO Aiguo First Institute of Oceanography, State Oceanic Administration, Qingdno 266003, China 

出　　处：《Chinese Science Bulletin》1999年第S2期244-246,共3页

摘　　要：THERE are four submarine hydrothermal activity areas in the Middle Okinawa Trough. They are Izena hole(127°05’E, 27°16’N), Iheya Deep (126°58’E, 27°33’N). Natsushima 84-1 Mound (127°08.6’E, 27°34.4’N), Western mount of Tokunoshima island (127°39’E, 37°52’N), respectively. In an attemptto determine the influence of the Middle Okinawa Trough area hydrothermal activity on copper distributionin the surrounding sediments, 8 surface samples and 6 core samples collected from this area were analyzedfor sequential extraction procedure and bulk analyses. 1 Samples and method Sediment samples were collected at 8 stations by dredger or piston corer (table 1). The sampleswere stored at【4℃, dried at【110℃, and finely ground to pass 200 meshes in an agate mortar.Sequential leaching procedures developed by Tessler were modified as follows: Cu (1) was ex-

关 键 词：COPPER HYDROTHERMAL activity Middle OKINAWA Trough. 

分 类 号：P618.41[天文地球—矿床学]