Thirtyfour samples were collected from surface sediments on outer shelf of the middle East China Sea,and 75 samples were collected from two cores of outer shelf of the southern East China SeaThe characteristics of sediments and heavy minerals of these samples have been studied,and grades of valuable heavy minerals in these samples are calculatedThe results show that valuable heavy minerals in relict sediments from the outer shelf of the East China Sea during the Late Pleistocene were derived from the continent of ChinaThe content of valuable heavy minerals is closely related to the content of fine sand and the total heavy minerals,grain size and sorting of the sedimentsHeavy minerals occured in regressivesequence in the littoral zone,and had been reworked and enriched by late transgressive processThey are mostly distributed between 100 m and 200 m of water depthThe highgrade valuable heavy minerals cover an area of about 1.2×10.4 kmThe grades of zircon and garnet have reached the order Ⅰanomaly of marineplacer,and the thicknessof valuable heavy minerals bearing sand in southern cores range from 1.5 to 2 metersZircon has met boundary grade(≥0.5 kg/m),and the grade of ilmeniteis commonly up to order Ⅱ and above order Ⅱ anomaly in the study areaThe conditions to form marine placer on the outer shelf are favorableThe placer resourceis considered to have a good economic potential and it is worth further investigation on the outer shelf of the East China Sea,especially along southern outer shelf
About author: Jin Bingfu,born in 1963,was graduated from Ocean University of China in 2003 with a doctoral degreeNow he is a profesor in Yantai Normal College,and is engaged in marine sedimentology
Cite this article:
. Valuable heavy minerals and their resource potential on outer shelf in East China Sea during the Late Pleistocene[J]. JOURNAL OF PALAEOGEOGRAPHY, 2004, 6(3): 372-379.
. Valuable heavy minerals and their resource potential on outer shelf in East China Sea during the Late Pleistocene[J]. JOPC, 2004, 6(3): 372-379.