Qualla: OK Mine & Smelter

OK Mine & Smelter: Introduction

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit G. Jenkinson, Public domain. The name came from an empty jam tin. When prospector John Munro struck rich copper carbonates on a low hill north of the Chillagoe field in September 1901, he reached for the closest label he could find and christened the place OK. It was an offhand christening for what became, briefly, one of the most important copper operations in North Queensland. More than a century later the bush has nearly swallowed it, but an octagonal brick chimney still stands against the sky, and beside it lies a vast, eerily symmetrical heap of black slag, the frozen residue of furnaces that ran hot for less than a decade.

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Image: G. Jenkinson | Public domain

OK Mine & Smelter: First to Pay

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit G. Jenkinson, Public domain. Munro had assayed his ore at an extraordinary 34 percent copper, and the OK Copper Mines Development Syndicate moved fast. By 1905 the company achieved something no copper outfit in North Queensland had managed before: it declared a dividend, five shillings a share, the first of ...

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Image: G. Jenkinson | Public domain

OK Mine & Smelter: The Chimney and the Furnace

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit Heritage branch staff, CC BY 3.0. Smelting copper is filthy, poisonous work, and in 1907 the company built the octagonal brick chimney that still defines the site, raising it tall to carry the harmful fumes up and away from the men below. That same year the English engineer Keith Maitland-Gibson, seasoned by Amer...

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Image: Heritage branch staff | CC BY 3.0

OK Mine & Smelter: The Ore Runs Thin

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit G. Jenkinson, Public domain. Copper mining lives and dies by two numbers: the world price and the grade in the ground. Both turned against OK almost at once. The boom prices of 1906 and 1907 collapsed within months, and below 150 feet the rich carbonates simply gave out. Output sagged, strikes flared over wa...

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Image: G. Jenkinson | Public domain

OK Mine & Smelter: What the Bush Keeps

Mon, 22 Jun 2026 00:00:00 GMT

Photo credit G. Jenkinson, Public domain. Mining never quite lets go. The First World War sent copper prices soaring again, and in 1930 the OK mine reopened to feed the state smelters at Chillagoe before closing for good in 1942. What survives now is a study in industrial archaeology: four terraces cut into the hillside ...

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Image: G. Jenkinson | Public domain