| _version_ | 1867168110138621952 |
|---|---|
| author | Markov, Yu D Mozherovsky, A V Derkachev, A N Barinov, N N Sereda, N A |
| author_facet | Markov, Yu D Mozherovsky, A V Derkachev, A N Barinov, N N Sereda, N A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Detailed mineralogical investigations of high-Fe layer silicates from loose sediments (glauconite sands) of the Sado Ridge revealed that green aggregates found on submarine rises of the Japan Sea floor have different genesis. It was demonstrated that round dark green grains approximate micas in composition. Primary volcanic rocks presumably have undergone extensive secondary alterations and then were disintegrated. Their disintegration products (protoceladonite) filling pores were redeposited and buried in sediments for a long time. Angular green grains mainly represented by smectite also formed at lower temperatures during disintegration of altered volcanosedimentary rocks. These younger grains had no prolonged exposure. Pseudomorphs of siliceous microplankton consist of both hydromica and smectites. They are presumably authigenic products formed with participation of microorganisms or electrostatic processes (spherical shape), or their combination. The formation mechanism of minerals filling cavities in pyroclastics is not entirely clear. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_785132 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical composition of layer silicates from the Sado Ridge, Sea of Japan Markov, Yu D Mozherovsky, A V Derkachev, A N Barinov, N N Sereda, N A Aluminium oxide; Archive of Ocean Data; ARCOD; Calcium oxide; Dredge; DRG; Event label; GC; Grab; GRAB; Gravity corer; Iron oxide, Fe2O3; Latitude of event; Longitude of event; Magnesium oxide; Manganese oxide; MMDBS-02-1895; MMDBS-02-1912; MMDBS-02-77100; Phosphorus pentoxide; Potassium oxide; Sample code/label; Sample type; Sea of Japan; Silicon dioxide; Sodium oxide; Titanium dioxide; Water in rock; Wet chemistry Detailed mineralogical investigations of high-Fe layer silicates from loose sediments (glauconite sands) of the Sado Ridge revealed that green aggregates found on submarine rises of the Japan Sea floor have different genesis. It was demonstrated that round dark green grains approximate micas in composition. Primary volcanic rocks presumably have undergone extensive secondary alterations and then were disintegrated. Their disintegration products (protoceladonite) filling pores were redeposited and buried in sediments for a long time. Angular green grains mainly represented by smectite also formed at lower temperatures during disintegration of altered volcanosedimentary rocks. These younger grains had no prolonged exposure. Pseudomorphs of siliceous microplankton consist of both hydromica and smectites. They are presumably authigenic products formed with participation of microorganisms or electrostatic processes (spherical shape), or their combination. The formation mechanism of minerals filling cavities in pyroclastics is not entirely clear. |
| title | Chemical composition of layer silicates from the Sado Ridge, Sea of Japan |
| topic | Aluminium oxide; Archive of Ocean Data; ARCOD; Calcium oxide; Dredge; DRG; Event label; GC; Grab; GRAB; Gravity corer; Iron oxide, Fe2O3; Latitude of event; Longitude of event; Magnesium oxide; Manganese oxide; MMDBS-02-1895; MMDBS-02-1912; MMDBS-02-77100; Phosphorus pentoxide; Potassium oxide; Sample code/label; Sample type; Sea of Japan; Silicon dioxide; Sodium oxide; Titanium dioxide; Water in rock; Wet chemistry |
| url | https://doi.org/10.1594/PANGAEA.785132 |