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The Dunedin runner claimed gold on day one of the Oceania Championships and set a new meet record in the process.
His time of 14min 07.17sec edged Auckland's Matt Baxter in the senior men's 5000m by just over a second in Townsville.
It was also a personal best for Chignell.
That reversed the result of the national championships, when Baxter edged Chignell for gold.
Meanwhile Taieri's Ethan Walker won bronze in the boys under-18 javelin.
He threw 58.46m to finish well-ahead of fourth, although was just over metre behind Australia's Hendre Kirchner in second.
Zharna Beattie, also of Taieri, threw 36.83m to finish fifth in the girls under-18 discus.
In the senior women's 5000m Rebecca Greene finished fourth in a time of 17min 21.47sec.