Timeline of events
The timeline section shows you an overview of the most important events from 1990 – 2020. You can filter the events by theme (e.g. ‘Economy’) by clicking on one of the square buttons below. Click on an event title for more details and references.
The two mining corporations form a strategic partnership for the construction and operation of Oyu Tolgoi.  Rio Tinto negotiates an exit clause in case..Read more
Ivanhoe and Rio Tinto successfully negotiate that the Mongolian Parliament repeals the Windfall Profits Tax of 68%, so the Oyu Tolgoi project can proceed. Along..Read more
Rio Tinto becomes the operator of Oyu Tolgoi and with Ivanhoe seeks to complete an international project-finance package of up to USD 3.6 billion.
Turquoise Hill Netherlands is a little-known Amsterdam-based company with three employees, no office, and not even its own mailbox. To the government of Mongolia, though,..Read more
As Rio Tinto acquires a majority stake in Ivanhoe Mines in January 2012, the name of Ivanhoe Mines is changed into Turquoise Hills Resources (TRQ)..Read more
Mongolia aims to raise the government stake in the Oyu Tolgoi mine from 34% to at least 40%, change the set royalty rate of 5%..Read more
President Elbegdorj questions the Oyu Tolgoi Investment Agreement (OTIA) in a speech, and raises the question about the need for its revision, so that export..Read more
In response to a possible tax increase, dispute over costs, and increasing political will to renegotiate the Investment Agreement, Rio Tinto halts Oyu Tolgoi operations..Read more
An agreement is signed between the IFC, the ERBD-financed Oyu Tolgoi LLC, and the Mongolian government for the purchase of power domestically, as well as..Read more
This phase includes the Hugo North lift 1 underground mine and the Southern OT open pit
In response to Rio Tinto and IMF, the government of Mongolia retracts its banking regulation.
The Joint project includes the Hugo North Extension and Heruga deposits. Rio Tinto is managing the construction. 
Simon Thompson, chair of Rio Tinto on 26 November 2018: “We do face some intractable problems, including our reliance on coal-fired power in Mongolia and..Read more
The parliamentary Working Group appointed to review the implementation of the Investment Agreement, submits a report to the National Security Council in March. It recommends..Read more
Shareholders reject the re-election of board members supported by Rio Tinto and blame Rio Tinto for delays, as shares value drop by 44%.