ORES

Deposit vein distributes in groups . Large ores have circle-type structure.

矿脉具有成群分布的特点,较大矿体具有伟晶岩矿床特有的环带状构造.

They provide the iron ores which supply the industrial complexes of Detroit and the surrounding regions.

它们给底特律及其周围地区的工业联合企业提供铁矿石.

It is with the metallic ores that we are concerned in this chapter.

我们在本章中要涉及的是金属矿石.

Ores bare in surface which is suitable for mining openly.

矿体裸露地表,适宜露天开采.

After enduring the hardship of the arduous fieldwork , the prospecting team discovered many new ores.

地质勘探队员餐风饮露,历尽辛苦, 找到了不少新的矿藏.

Iron ores of greatest economic interest contain magnetite and hematite.

最具有经济价值的铁矿包括磁铁矿和赤铁矿.

Microscopically the ores are medium grained to amorphous.

显微镜下,矿石为中粒至非晶质.

Later, he found that fine ( together with charcoal ) could be used to extract certain metals from ores.

后来, 人们发现,用火 ( 加上炭 ) 可从矿石中提炼某些金属.

Fire provided a means of smelting ores.

火提供了熔炼矿石的手段.

After proper ore dressing, the ores can be used for deep procession.

此矿床之矿石属钙基膨润土,经适当选矿后可用于深加工.

Ores are also being obtained in quantity from other countries.

矿石也从国外大量输入.

They'd mined the hillside for the ores.

他们曾在这个小山坡上开采矿石.

In some high-grade ores, phenocrysts adhere intimately to the pseudomorphs.

在有些高级矿石内, 斑晶紧连着假晶.

This is not always true-as with the manufacture of pig iron and steel from low-grade iron ores-but it did lead to the concentration of industrial developments on the coal fields.

并非一概如此 — 例如从低级铁矿石中生产生铁和钢材的情况一但是这导致了工业发展集中在煤田上.

Their materials costs are largely governed by prices on world markets for fuels and ores.

物料成本在很大程度上受世界市场燃料和矿产价格的制约.