Tanah Laut (Pontijn), Kalimantan Tengah Province (South Kalimantan Province), Borneo, Indonesia

Placer deposit.

Pontijn (or Pontyn) river, near Asemasen town, SE cost of Borneo.

Exsolution/recrystallization two-stage process from a homogeneous Fe/Cu/Ni sulfide melt : Exsolution into MSS (monosulfide solid solution) and ISS (intermediate solid solution) and evolution of MSS into pentlandite+heazlewoodite and of ISS into chalcopyrite+bornite.

(cf. K.H. Hattori et al. , Min. Mag. , April 2004, V68, N°2, pp. 353-368).

Mineral List:

	'Amphibole Group'

	Bornite

	Chalcopyrite

	Corundum var: Sapphire

	Diamond

	Erlichmanite

	Heazlewoodite

	Laurite (TL)

	Osmium

	Pentlandite

	Platinum

	Pyrite

	Pyrrhotite var: Nickeloan Pyrrhotite

	Ruthenium

	Sperrylite

15 entries listed. 12 valid minerals. 1 type locality (valid mineral).

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