https://www.jstage.jst.go.jp/article/jcssjnendokagaku1961/10/2/10_2_52/_pdf

The x-ray identification and crystal structures of clay minerals

38Å Interstratified Clay Mineral from Tokura, Gunma Prefecture

Thermal transformation of vermiculite weathered from biotite

Although the Mesozoic rocks of the Transdanubian Range have been the subject of a multitude of different studies, mineralogical research is largely underrepresented. The clay mineralogy of Lower Jurassic (especially the Pliensbachian and Toarcian) strata was broadly investigated earlier; however, systematic high-resolution clay mineralogical studies remain scarce. Here we present a mineralogical
study focusing on the Upper Pliensbachian strata of the L� okut-Hossz � u��arok section, located near the Epl�eny Manganese Ore Field. We identified dioctahedral smectite, randomly interstratified illite/smectite, illite as 10 �A phyllosilicate, quartz and cristobalite. Based on our new results we propose that the smectite was formed by aging of Mg or Fe hydroxide-silica precipitates. The smectite and cristobalite were presumably formed from the siliceous tests of radiolarians, whose abundance was controlled by a local upwelling system. The occurrence of Pliensbachian smectite in the L� okut outcrop shows � similarities with the Urk � ut smectites known from both Pliensbachian and Toarcian strata, which implies � that similar processes controlled the sedimentation during the Pliensbachian as well as during the black (gray) shale-hosted ore accumulation in the Epl�eny and Urk � ut basins.

/pdf/occurrence-and-significance-of-smectite-in-the-pliensbachian-2zrp9n8y8h.pdf

Occurrence and significance of smectite in the Pliensbachian (Lower Jurassic) at Lókút (Bakony Mts., Hungary)

The Occupational Safety and Health Act of 19701 was promulgated for the express purpose of providing American workers with protection against personal injury and illness resulting from hazardous working conditions.

Applications of X-Ray Diffraction in Occupational Health Studies

Usual polycrystalline particles measuring <or=1 mu m were observed in and near FCC Co, the binder phase of hard metals, bearing a strong resemblance to certain spinels occurring in nature.

The x-ray identification and crystal structures of clay minerals

Citations

38Å Interstratified Clay Mineral from Tokura, Gunma Prefecture

Thermal transformation of vermiculite weathered from biotite

Occurrence and significance of smectite in the Pliensbachian (Lower Jurassic) at Lókút (Bakony Mts., Hungary)

Applications of X-Ray Diffraction in Occupational Health Studies

Observation of spinel particles in sintered WC-Co hard metal by transmission electron microscopy

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