Buchan's Lode, Bannockburn, Cromwell, Central Otago District, Otago Region, New Zealand
Massive stibnite showing slickenslides from further movement on the fault after deposition. FOV = ~5.0 cm. Collection and photograph of Rod Martin
Stibnite deposited in an active fault where further movement has brecciated the mineralised vein and allowed alteration of the boundaries of metallic stibnite into Sb secondaries (red, brown and cream coloured). Specimen now in NSRH collection, Auckland, NZ. Photograph of Rod Martin.
© R. J. Martin
Radiating sprays of valentinite on massive stibnite FOV = ~6.0 cm. Collection and photograph of Rod Martin
Cross-section through a mineralised vein. FOV = ~3.5 cm. Collection and photograph of Rod Martin
Valentinite prisms on stibnite FOV = ~3.0 cm. Collection and photograph of Rod Martin
Oxidised needles of stibnite FOV = ~3.5 cm. Collection and photograph of Rod Martin
Deformed stibnite needle with coating of valentinite(?). Collection and photograph of Rod Martin
Valentinite in radiating clusters. Field of view: 7.5mm.
© Judy Rowe
Yellow senarmontite on needles of stibnite (some of which have a coating of valentinite). 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin.
Stibiconite pseudomorphs of stibnite on a joint plane. 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin.
Yellow senarmontite on needles of stibnite, some of which have a coating of valentinite (left and right sides) and a valentinite crystal (off centre, lower left). 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with ...
This sample has been cleaved parallel to the wall of the mineralised vein just above the prismatic quartz. It mainly consists of pale lemon to bright yellow valentinite with some white stibiconite. The daughter photo is of the other half of the specimen to the left of this view. 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X ...
Partial section of an altered, mineralised vein. Red-brown hematite at top (where it has separated from the country rock), then a mixture of prismatic quartz and yellow valentinite. Some small sections of stibnite can be seen at the base and right hand side but most (in this view) has been altered to orange-yellow stibiconite. The quartz at bottom ...
Sulphur crystals in massive stibiconite. 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin.
Limonite pseudomorphs of siderite. 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin.
Stibnite with a coating of valentinite on quartz. 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan Achromatic Objective Lens. Processed with Zerene stacker DMap and post stacking cleanup with Faststone. Collection and photograph of Rod Martin.
Massive quartz showing grooved slickenslides from further movement on the fault after deposition. The quartz is underlain by hematite, various Sb secondary minerals and massive stibnite. Collection and photograph of Rod Martin.
This sample has been cleaved parallel to the wall of the mineralised vein just above the prismatic quartz. It consists almost completely of white stibiconite with some, rare, pale lemon valentinite. The main photo is of the other half of the specimen to the right of this view. 5MP Chinese unbranded CMOS camera with bellows and FYSCOPE 4X Plan ...
View across the largest of the three mineralised faults. The near side of the scarp was bulldozed away in the 70's and large boulders of massive stibnite remain in the mullock heaps. Photo from 2008 NZ Micro-Mineral Symposium fieldtrip.
As far as we could take the vehicles.
