The Journal of the Geological Society of Japan

On the Ores from the Dairisiko and Hatidoko Iron Ore Deposits, Tohendo, Manchoukuo

Tosio SUDO

1940 Volume 47 Issue 559 Pages 135-142
Published: April 20, 1940
Released on J-STAGE: April 11, 2008

DOIhttps://doi.org/10.5575/geosoc.47.135

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Dairishiko Iron Ore Deposit is located about 10 km southwest of Rinko ( ?? ?? ) Tsuka province (on the bank of the Oryokko River), Manchoukuo., The ore bodies are the irregular mass of goethite and rather parallel beds in the so-called Utai dolomitic limestone, containing hematite, chlorite (thuringite) and the small amount of pyrite, chalcopyrite, and zincblende, penetrated by small dolomite and quartz veins., The ore deposit consists of limonite or siderite beds or other iron-bearing sediments secondarily enriched by weathering and hydrothermal solution., Hatidoko( ?? ?? ?? ) Iron Ore Deposit, located about 8 km northwest of Hatidoko, is an iron ore bed at the basal portion of Sinian quartzite, a shallow sea deposit., The ore is the quartz-hematite sandstone (Fe : 30∼40%), containing quartz, hematite, orthoclase, plagioclase and microcline, cemented with sericite, penetrated by quartz veins or porohyrilic dikes showing irregular enrichment (Fe : about 60%)., The deposit was formed by the primary deposition of hematite and clay minerals changed to sericite by the thermal metamorphism of dike rocks.,

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On the Eruption of Sakura-zima Volcano in 1939, with Petrological Notes of its Ejecta

Kenzi YAMAGUTI

1940 Volume 47 Issue 559 Pages 143-164
Published: April 20, 1940
Released on J-STAGE: April 11, 2008

DOIhttps://doi.org/10.5575/geosoc.47.143

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103., Dinosaurian Footprints found near Yangshan, Chinchou, Manchoukuo

Hisakatu YABE, Yutaka INAI, Tokio SHIKAMA

1940 Volume 47 Issue 559 Pages 169-170
Published: April 20, 1940
Released on J-STAGE: April 11, 2008

DOIhttps://doi.org/10.5575/geosoc.47.169

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Four apparently tridactyle footprints impressed on two coarse-grained sandstone plates were collected by Mr., S., SATO's party of geological explorers of the Mansyu Kogyo Kaihatu Kaisya at Ssuchiatzu near Yangshan, lying south of Choyang in Chinchou., The sandstone is presumably Cretaceous in age., The best one is here photographed (somewhat reduced, about 0., 7 of natural size)., For the convenience of future reference, the footprints are to be distinguished under the name Jeholosauripus s-satoi ; some details are to be given in the forthcoming number of the Proceedings of the Imperial Academy, Vol., XVI.,

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104., On a Fossil Elephant found at Ogurazi near Hukusima City, Hukusima Prefecture in North Japan

Manabu KOBAYASI

1940 Volume 47 Issue 559 Pages 171-174
Published: April 20, 1940
Released on J-STAGE: April 11, 2008

DOIhttps://doi.org/10.5575/geosoc.47.171

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In last May I found an elephant remain at the cited locality in a Pleistocene deposit of 15 to 20 m in thickness which consists chiefly of clay, sand and gravel in alternation with intercalations of lenses of andesitic purmice., It is overlain by a younger formation and underlain by the Tertiary agglomerate., The fossil is a fragmentary tooth which may be referred to Palaeoloxodon namadicus naumanni (MAKIYAMA)., The specimen in which three chirolites are preserved is 48 mm long, 73 mm broad and 85 mm high., The grinding surface is concave., On a side of the chirolites there is a distinct loxodont plica at the middle., The enamel layers measure 2 to 2., 5 mm in thickness.,

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