Pallasite, PMG-am (main-group, anomalous metal composition)
Found 1924
22° 22' S., 135° 46' E.
The first transported specimen of 1,084 g was found at Alice Springs, Northern Territory, Australia. In July, 1937, the main mass of 1411 kg was found where it had been lying for thousands of years. The mass was surrounded by 900 kg of iron shale. The majority of the material had been residing at depth and has been weathered to the point that the nickel-iron matrix is transformed into hematite and magnetite. The olivine crystals are intact and of high iron content.
Huckitta is one of a small number of main group pallasites with anomalous elemental abundances. It has very high Ge and Ga contents, and elevated Pt, W, and Ir (Wasson and Choi, 2003). It also has a lower Au content than most other main group members. The above specimens are a 15.3 g oxidized partial slice (right) and a much rarer 5.5 g unoxidized end section that has escaped transformation into hematite by residing nearer the surface.
