By Mai Nguyen
SINGAPORE, Sept 6 (Reuters) - Shanghai tin slipped on Friday but posted its best week on record, while prices in London were on course to post their best weekly gain in more than three years, bolstered by production cuts by major producers.
Some of the world's top refined tin producers have unveiled production cuts following a recent slump in prices.
Producers including the world's top two - China's Yunnan Tin and Indonesia's PT Timah - plan to reduce production by around 30,000 tonnes this year, meaning about 8% of estimated supply this year could come out of the market.
The most traded tin contract on the Shanghai Futures Exchange (ShFE) rose 10% this week, its highest weekly gain on record, despite ending down 1% on Friday.
Benchmark tin on the London Metal Exchange (LME) declined 1.3% to $17,220 a tonne by 0714 GMT, but still up 5.3% so far this week, on course for its best week since March 2016.
* COPPER: London copper was rising 2.5% so far this week, its best since June, while Shanghai copper rose as progress after China and the United States agreed to hold high level trade talks, reviving hopes for an end to a prolonged dispute.
* PRICES: ShFE copper rose 1%, aluminium advanced 0.3%, while nickel dropped 4.3%. LME copper eased 0.4%, aluminium dipped 0.4%, zinc dropped 1%, while nickel fell 0.5%.
* NICKEL: "Indonesia government announced that miners can seek new export quotas, which will be valid until the end of the year. This is likely to result in a surge in exports of nickel ore ahead of the planned ban on 1 January 2020," said ANZ.
* INDONESIA: Indonesia on Thursday released a decree allowing new exports quotas to be issued but only for validation until the end of this year.
* NICKEL MINER: Poseidon Nickel Ltd, buoyed by a recent surge in nickel prices, said on Friday it would restart operations at its Black Swan project in Western Australia.
* ZINC: Goldman Sachs analysts in a note estimated large surpluses for the global zinc market in 2020 and 2021, after global balance moved to surplus in 2019 following three big years of deficits.
* LYNAS: Australian rare earths producer Lynas Corp said it signed an agreement with the outback town of Kalgoorlie to explore a potential initial ore processing site as it tries to soothe concerns in Malaysia about radioactive waste.
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Three month LME copper
Most active ShFE copper
Three month LME aluminium
Most active ShFE aluminium
Three month LME zinc
Most active ShFE zinc
Three month LME lead
Most active ShFE lead
Three month LME nickel
Most active ShFE nickel
Three month LME tin
Most active ShFE tin
ARBS (Reporting by Mai Nguyen; Editing by Rashmi Aich and Sriraj Kalluvila)