重砂矿物为钛铁矿、金红石、锆石、独居石等，主要分布于北康暗沙和南康暗沙一带、曾母暗沙浅滩海域的钙质生物砂中。
The valuable heavy placer minerals consist of ilmenite , monazite , zircon , and rutile etc , which are mainly distributed in calcareous biological sand in the Beikang , Nankang and Zengmu submarine banks .
北康暗沙