The Tari district, Tottori Prefecture, is situated about 43 km. SSE of Matsue city, Shimane Prefecture.
The mines in this district are situated about 800 m. above the sea-level, and are about 400 m. above than the Tari environs.
Serpentinites or serpentinized peridotites occur near the ridge among the boundary line of Shimane, Tottori, Okayama and Hiroshima Prefectures, and occupy a moderately large area.
The characteristic geology in the Tari district is that these ulta-basic rocks intrude in Palaeozoic sediments and some serpentinites associate with chromites.
In this paper, the writer summarized the results of studies on the chromites and their country rocks in this district, including the description of two kinds of leuchtenbergite found by the author.
The author wishes to express his gratitude to President S. Yamane and Assistant Professor S. Nishiyama of Shimane University for their encouragemements.
The expences of this study was partly defrayed by the Sientific Reserches provided from the Ministry Education of Japan, to which the writer wishes to express his thanks.