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NZHerald A New Zealand-led team of international scientists has successfully drilled through the alpine fault in the western South Island, the first phase of a project to learn about earthquake mechanisms on the fault.
The scientists drilled adjacent boreholes to depths of 101m and 152m on river terraces next to Gaunt Creek, near Whataroa 140km south of Greymouth on the West Coast, early last month.
They collected rock cores and made geophysical scans of the borehole walls, project co-leader Rupert Sutherland of GNS Science said today.
“They installed permanent monitoring instruments to record temperatures, pressures, and seismic activity inside the boreholes before back-filling both holes,” he said.
“We were astonished that we managed to collect such high-quality rock cores across a zone that has been smashed by literally thousands of magnitude 8 earthquake movements over millions of years.”
For more go here: http://www.nzherald.co.nz/science/news/article.cfm?c_id=82&objectid=10712830&ref=rss