山东省滨海砂矿以石英、锆英石、磁铁矿、砂金等为主，其次为贝壳、球石、钛铁矿、金红石等。
Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.
文中例举的事实表明砂金矿山回收磁铁矿、石榴石、金红石、钛铁矿、锆石及建筑砂石所收到的经济效益。
These examples illustrated the economic benefit of the recovery of magnetite, garnet, rutile, gregorite, zircon and building sand that were mined in the placer gold mine.
磁铁矿片麻岩的泥质矿物特征和碎屑锆石的存在表明，原岩不是一个纯化学沉积体。
The pelitic mineralogy of the magnetite gneiss and presence of detrital zircon demonstrate that the protoliths were not a pure chemical sediment.
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