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Sulphur?

Kurokawa Mine

Kurokawa, Hishi village, Kiryu city, Gunma pref., Japan

Source for sulphur and Sulphuric acid

Sulphur

Field of view: 1 mm. Bubble-like groups of sulphur. The bubble-like groups of yellow earthy parts are sulphur. The black basement is slate, the host of the deposit.

Recovered from slate near a chert-hosted bedded manganese deposit subjected to Albite-Epidote-hornfels contact metamorphism. This slate is a matrix of the accretionary complex in which the deposit-host chert block is included.

It is considered that sulphur was formed by reduction of SO4 by carbon in slate. SO4 was formed by weathering sulfide minerals in the deposit.

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