BRIEF-Erdene provides update on Trans Altai Alliance
April 22 (Reuters) - Erdene Resource Development Corp
* Erdene provides update on Trans Altai Alliance
* Agreed with teck resources limited to extend optional subscription date for 2016 for co's strategic alliance in mongolia
* Extended optional subscription date for 2016 for company's strategic alliance in mongolia by 60 days to june 23, 2016
* New subscription date coincides with planned commencement of 2016 field exploration program Source text for Eikon: Further company coverage:
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