日高国新冠村新冠川石灰石鉱床とその製品試験について
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概要
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Many limestone ores have been reported at the main stream of Niikappu river and its tributaries. These limestone bearing formation is called the Kamui Group which is correlated to middle and lower Jurassic, consisted, slate, chert and schalstein. The Kami Group intercalates many limestone masses at the western flank of the Hidaka mountain range, along Horobetsu river, Shunbetsu river and Koibokushibichari river. Among these limestone masses the largest one was discovered by the Geological Survey of Hokkaido, in 1959, during the geological survey of Idonnappu geological map sheet. This limestone is consist from two parallel irregular lens shape bodies, and the south lens is devided into 2 parts, No. 1 ore and No. 2 ore, by WE trend fault. The north lens is called No. 3 ore. Limestone reserve of No. 1, No. 2 and No. 3 have already been published as 14,000,000 t (workable 8,400,000 t), 90,000,000 t (workable 54,000,000 t) and 33,000,000 t (workable 19,800,000 t) each other. The writer re-examined the No. 2 ore, the largest of all 3, from the stand poin of actual economical mining. He settled the economical mining basal point to 650 m level and calculated the reserve, elliminating the low grade quality ore of the eastern and western part. The safety economical ore reserve was considered as 10,150,000 t. Regarding the quality of limestone, the writer took 81 samples between 300 m hight in NS direction and 300 m level in WE direction. The average value of CaO is 48.8%. Generally speaking this ore is said to be the middle class ore, though the northern part and north eastern part of the ore show a little bit lower grade quality than average. Marketting test was operated as follow. 6 t of sample, over CaO 50%, was collected and sent to the Shibetsu Sekkai Kogyo K.K. The sample was crashed as 80 mm size, put 1 ton into rotary kiln and 950 gr of coke was added, repeat this performance for 6 times. Ash-12% Volatile matter-1.5% Fixed carbon-86.1% Cal.-7,000 K.cal. size-30-50 mm. Calcination time is 50.5 hours. Calcination temperature is as follow. preliminary 100℃- 500℃ heating 1,000℃-1,250℃ cooling 30℃- 400℃ Comparison test between the Niikappu lime and the Shibetsu quick lime for agricultural medicine and epidemic prevention use.
- 一般社団法人日本応用地質学会の論文
- 1971-12-01