New field will enable eventual exports to China via 'western route' through Altai Mountains.
Accident involving drilling works sparks massive blaze but thankfully no injuries.
Altai route for gas to China could take priority, reported Reuters.
Agreement means Power of Siberia pipe could be delayed, it is claimed.
After months of speculation, parliament and President rubber-stamp deal that will see gas sent to China.
Gazprom says operations are 'in full swing' with work due to start soon on iconic pipeline to provide gas on eastern route.
Dignitaries gather on Chinese side of the pipeline to witness the formal welding of the first joint in $55billion line.
Bulging bumps in the Yamal and Gydan peninsulas believed to be caused by thawing permafrost releasing methane.