Sentence examples for rich minerals from inspiring English sources

It must have been spoken about by the brilliant Anglo-Saxon metal workers, and involved taking gold which was alloyed with up to 25% silver, and heating it in an acid solution – made from iron rich minerals such as brick dust – so that at the surface the silver leached out and could be burnished off.

In a separate meeting on Saturday with South Korean politicians and scholars, Kim Yang-gon suggested more economic ties between the two Koreas, voicing hopes of shipping some of the North's rich minerals to the South, Yonhap, a South Korean news agency, reported, quoting people who attended the meeting.

The Ca present in groundwaters is derived from Ca rich minerals like feldspars, pyroxenes and amphiboles from granitic rocks.

A much higher specific gravity of red mud than that of normal soil was obtained primarily due to the presence of iron rich minerals in red mud.

However, the origin of fluoride was largely controlled by the fluoride rich minerals in the hard rocks of the study area.

The concentrations of calcium range from 12.5 to 404 mg/l (Fig. 3a; Table 1), which is derived from calcium rich minerals like feldspars, pyroxenes and amphiboles.

Two major types of iron-rich sedimentary rocks are recognized: (1) iron formation, or banded iron formation (BIF regionally extensive, locally thick sequences composed of alternating thin (millimetre to centimetre thick) layers of mainly crystalline-textured iron-rich minerals and chert and (2) ironstone noncherty, essentially clastic-textured, iron-rich minerals of local extent.

Because of the limited occurrence of this mineral, it was once true that only certain felsic igneous rocks (those consisting largely of the light-coloured, silicon and aluminum-rich minerals feldspar and quartz) could be dated.

At present, iron is not easily dissolved, nor can it be readily transported in solution and subsequently precipitated as crystalline-textured, iron-rich minerals, because of the presence of free atmospheric oxygen.

The presence of large quantities of reduced (hydrogen-rich) minerals, such as uraninite and pyrite, that were exposed to the ancient atmosphere in sediments formed over two billion years ago implies that atmospheric conditions then were considerably less oxidizing than they are today.

Iron-rich minerals exist as authigenic.   5.