* Lead sinks to lowest since early September
* GRAPHIC-2019 asset returns: http://tmsnrt.rs/2jvdmXl (Adds analyst comment, updates prices, changes dateline from SINGAPORE)
LONDON, Nov 13 (Reuters) - The price of copper and other base metals slipped on Wednesday after U.S. President Donald Trump threatened more tariffs on China, disappointing investors keen for a trade deal.
While Trump said in a speech that a phase one trade deal was close, the market focused on his comments about raising tariffs on Chinese goods "very substantially" if a deal fails to be agreed.
"It raised the level of uncertainty again, coming at a time when the market's been in risk-on, happy-days mode for the past month," said Ole Hansen, head of commodity strategy at Saxo Bank in Copenhagen.
"If you look at copper, it's breaking down a bit. We've had this uptrend since the start of October, but we failed to break above $6,000 and the 200-day moving average."
Last week, copper touched $6,011 a tonne, the highest in more than three months, after gaining about 8% since the start of October.
Hansen said traders were focusing on support at $5,800, a key technical level.
Three-month copper on the London Metal Exchange (LME) had shed 0.6% to $5,836.50 a tonne by 1100 GMT, the lowest since Nov. 1 and on track to fall for a fourth straight session.
* COPPER STOCKS: Copper inventories in LME-approved warehouses <MCUSTX-TOTAL> fell to a five-month low at 224,425 tonnes, while stocks in warehouses tracked by the Shanghai Futures Exchange <CU-STX-SGH> have declined 44% since March to 148,687 tonnes.
* CHILE COPPER: Most of Chile's copper miners said they had maintained their operations on Tuesday, albeit with some delays and sporadic unrest, amid calls for a general strike and a fresh day of social protests.
* ALUMINIUM DEMAND: China's aluminium consumption is seen falling for the first time in 30 years this year as domestic demand and exports decline, research house Antaike said.
* ALUMINIUM POSITION: The LME net speculative short position had declined to just 1.2% of open interest at Monday's close, down from a recent peak of 31% in early October, Alastair Munro at Marex Spectron said in a note, referring to the broker's position estimates.
* PRICES: LME aluminium eased 0.6% to $1,767 a tonne, nickel fell 1.3% to $15,460 and zinc declined 1.4% to $2,437.
Lead dropped 1% to $2,038, the lowest since Sept. 6, while tin added 0.4% to $16,410 after touching $16,020, the weakest since Oct. 1.
* For the top stories in metals and other news, click or (Reporting by Eric Onstad; Editing by Dale Hudson)