The exploration and development company became the second Australian miner since April to back off from plans to buy the Glencore's CSA, in New South Wales.
A swift deterioration in China-US trade talks hit global financial markets this week as investors faced the prospect of an escalation rather than an end to a 10-month-old trade war.
The Australian miner believes that Cascabel and now Porvenir are the first in a long, large and rich string of copper-gold projects it will develop in Ecuador.