p pa pb pc pd pe pf pg ph pi pk pl pm pn po pp pr ps pt pu pv pw px py

Перевод: placer

[существительное]
россыпь ; золотой прииск

Тезаурус:

1. Of large build and possessed of ritual mannerisms when facing the bowling, his technique was founded in the securest of defence, and, although he was a shrewd placer of the ball, it was perhaps his seeming doggedness that left him out of the international reckoning at a time when England possessed several middle-order batsmen of sterling class.
2. RioFinex planned to examine the Mawddach estuary in North Wales in the late 1960s for placer gold derived from the Dolgellau gold deposits.
3. Gold appears either in its parent rock or in placer deposits in which the products of long periods of erosion are concentrated in the alluvium of existing river systems or buried under later sedimentary or igneous rocks.
4. In addition to the deposits in the Helmsdale and Southern Uplands areas mentioned above, placer gold has been recovered as a by-product of alluvial tin mining in South-west England.
5. Plans to dredge the top metre of sediment off the north Cornwall coast have been put forward by Marine Mining; exploration drilling for deeper placer deposits in buried river channels has been carried out in Mount's Bay and St Austell Bay.
6. Placer gold
7. During the four years of the project the BGS work established that the widespread placer gold deposits of the Pacific Coastal Littoral were in broad terms directly related to the presence of major mid-Quaternary mudflow deposits that either contained significant concentrations of fine-grained gold and accordingly were mined directly, or overlay older gold-rich palaeochannels preserved as deep-lead deposits.
8. The area was not glaciated, but periglacial effects, combined with recent weathering and erosion, have formed tin placer deposits in many valleys.
9. Exploration for placer tin deposits has been carried out in South-west England off the north and south coasts of Cornwall (see under tin in Appendix 1).
10. Offshore placer deposits
11. Marine Mining (Cornwall) Ltd carried out trial working of placer tin deposits off the north Cornwall coast.
12. During the four years of the project the BGS work established the provenance of the widespread placer gold deposits of the Pacific Coastal Littoral.
13. Minor placer enrichments have been found in coastal dunes at Rattray Head, near Fraserburgh but the offshore potential is unknown.