CLAY MINERAL DISTRIBUTION IN SURFACE SEDIMENTS IN THE SEAS AND OCEAN ALONG THE EASTERN ASIAN CONTINENT, WITH SPECIAL REFERENCE TO THE RELATION TO MORPHOLOGY AND CHEMISTRY
スポンサーリンク
概要
- 論文の詳細を見る
Two hundred forty-one surface sediment samples collected from the Sea of Okhotsk, the Sea of Japan, and the East China, South China, and Philippine seas,including the Gulf of Thailand, were used in this study. Clay mineral compositions of the clay fractions (<2 μm) of the samples were determined by X-ray diffraction, and the distributions of clay minerals such as smectite, illite, chlorite, and kaolinite in the seas were investigated. The clay mineral distributions reflected the influences of various factors such as the geology and soils of the surrounding land areas, river runoff, and transportation by wind and sea currents. The high concentration of smectite in sediments of the Sea of Okhotsk and off the east coast of Luzon Island in the Philippines reflected volcanic influences. The high concentration of illite in the East China Sea and farther east was attributed to sediment discharge from the Yellow and Yangtze rivers of China and to aeolian transport from China. Chlorite tended to be more abundant at higher latitudes. Kaolinite was the least abundant of the four clay minerals, but kaolinite content was relatively higher in the sediments of the South China Sea, that is, at low latitudes. In addition, the chemical compositions and morphologies of 18 clay mineral particles contained in 11 sediment samples were analyzed by means of analytical transmission electron microscopy (ATEM). Smectite occurred most frequently as Al-Fe(Al^<3+>Fe^<3+> in the octahedral sheet) beidellite, but in the Philippine Sea, Fe-Al beidellite was found. Saponite was not abundant, but was found in every sea. Sediments of the Sea of Okhotsk contained Fe-Mg chlorite, whereas the sediments of the other seas contained Mg-Fe chlorite. Illite was dioctahedral, and the potassium content of the interlayer sheet tended to decrease toward the lower latitudes. Although clay mineral morphology did not clearly differ from area to area, the morphologies of the clay mineral particles examined in the present study all reflect a clastic origin.
- 日本粘土学会の論文
著者
-
Aoki Saburo
Natural Science Laboratory Toyo University
-
KOHYAMA NORIHIKO
National Institute of Industrial Health
-
OINUMA KAORU
Natural Science Laboratory, Toyo University
-
Oinuma Kaoru
Natural Science Laboratory Toyo University
-
Oinuma K
Natural Science Laboratory Toyo University
関連論文
- CLAY MINERALOGY IN SAMPLES FROM TWO SEDIMENT TRAPS AND A SEDIMENT CORE FROM THE WEST CAROLINE BASIN
- THE DISTRIBUTION OF CLAY MINERALS IN SURFACE SEDIMENTS OF THE OKHOTSK SEA TO THE SOUTH CHINA SEA ALONG THE ASIATIC CONTINENT
- ON THE DISTRIBUTION AND SOURCE OF CLAY MINERALS IN SEDIMENTS OF THE PERSIAN GULF
- CLAY MINERAL DISTRIBUTION IN SURFACE SEDIMENTS IN THE SEAS AND OCEAN ALONG THE EASTERN ASIAN CONTINENT, WITH SPECIAL REFERENCE TO THE RELATION TO MORPHOLOGY AND CHEMISTRY
- Characteristics and modifying factors of asbestos-induced oxidative DNA damage
- CLAY MINERALS OF THE FIG TREE SHALE IN THE EARLY ARCHEAN
- ALUMINIAN CHLORITE FROM KAMIKITA MINE, JAPAN
- Preparation and characteristics of standard reference samples of fibrous minerals for biological experiments
- Characterization of Steroid/Cyclodextrin Inclusion Compounds by X-Ray Powder Diffractometry and Thermal Analysis
- BEHAVIOURS OF CLAY MINERALS IN TREATMENT WITH HYDROCHLORIC ACID, FORMAMIDE AND HYDROGEN PEROXIDE
- Geological Research on the Bottom Sediments Sampled by the Fifth Japanese Antarctic Research Expedition
- IN MEMORY OF PROF.TOSHIO SUDO(JULY 12, 1911-APRIL 12, 2000)
- A Total Sample Preparation Method for the Measurement of Airborne Asbestos and Other Fibers by Optical and Electron Microscopy
- Length-Reduction Method for Man-Made Mineral Fibers for Biological Experiments