- Tri-Star Resources [LON:TSTR] has provided an update on the construction of the Oman Antimony Roaster (OAR) being undertaken by the company's Omani joint-venture company, Strategic & Precious Metals Processing LLC.

Tri-Star has a 40% equity interest in SPMP.

"Since the appointment of Worley Parsons, as EPCM contractor in February 2016, engineering design, procurement of long lead time items and plant layout have been progressing well," Tri-Star said in a statement.

"The OAR plant design has been enhanced, both by the inclusion of a gold recovery stream and also by increasing capacity and associated design changes intended to create the ability to treat a wider range of different feedstocks. Maximum potential throughput has been increased from 36,000 tonnes per annum to 50,000 tonnes per annum.

"A more streamlined plant layout is also expected to lead to a reduction in the site area from the initial planned 22 hectares, to 15 hectares. Site preparations have been completed and SPMP took formal control of the site on 24 October 2016. Civil engineering work is expected to commence in earnest by the end of the year.

"The Company is also pleased to report that the manufacture of key plant components is underway and major capital items are expected to arrive on site during the first half of 2017.

"Finally, negotiations with potential suppliers of concentrate are underway and test-work on sample materials is shortly to be conducted. As previously advised, a contractual trading arrangement with a major commodity trader is under negotiation.

"Tri-Star intends to issue operational updates on the OAR more regularly now that ground-works have commenced."

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Berkeley Energia [LON:BKY] has raised around $30m, gross, through a placing of 53,581,953 ordinary shares at 45p apiece.

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Landore Resources [LON:LND] has announced that a new copy of the company's corporate presentation is available to view on its website:

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The sector's biggest riser was Amur Minerals [LON:AMC] - up by more than 12% in late trading - while the biggest faller was North River Resources [LON:NRRP] - down by over 8.3%.

At 4:16pm:

[LON:AMC] Amur Minerals Corporation share price was +0.45p at 4.15p

[LON:BEM] Beowulf Mining PLC share price was 0p at 5.75p

[LON:BKY] Berkeley Energia Ltd share price was +2.75p at 48.25p

[LON:CEY] Centamin PLC share price was -8.35p at 156.95p

[LON:CHL] Churchill Mining PLC share price was +0.75p at 31.5p

[LON:CZA] Coal of Africa Ltd share price was +0.27p at 3.51p

[LON:FDI] Firestone Diamonds PLC share price was 0p at 56p

[LON:FRES] Fresnillo PLC share price was -76p at 1627p

[LON:GEMD] Gem Diamonds Ltd share price was -1.37p at 114.13p

[LON:HOC] Hochschild Mining PLC share price was -5p at 264.9p

[LON:KMR] Kenmare Resources PLC share price was +2.25p at 285p

[LON:LND] Landore Resources Ltd share price was -0.13p at 3.5p

[LON:NRRP] North River Resources PLC share price was -0.75p at 8.25p

[LON:TSTR] TriStar Resources PLC share price was +0.01p at 0.13p

[LON:VED] Vedanta Resources PLC share price was -30.75p at 711.25p

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