High resolution electron microscopic characterization of phyllosilicates and finding of a new type with 11Å structure in Yamato-74662
スポンサーリンク
概要
- 論文の詳細を見る
Matrix materials in Yamato-74662 have been examined by HREM and AEM. Under microscopic observations, phyllosilicates in Yamato-74662 were found; i) as matrix materials, ii) in irregular cavities, and iii) replacing pyroxene and olivine grains. Five types of phyllosilicates in the matrix were observed by HREM; a) 7Å platy phyllosilicate, b) 7Å poorly organized tubular phyllosilicate, c) 17Å platy phyllosilicate, d) poorly organized 7Å layer structures with interlayering of 5Å layer structure and e) 11Å platy phyllosilicate. Parallel intergrowth of the 11Å mineral and 7Å berthierine, and characteristic HREM suggest that the 11Å mineral is a new phyllosilicate with an interstratified structure of serpentine-like and brucite-like layers. Mineralogy and texture of the matrix suggest that the phyllosilicates were derived by alteration from such precursor materials as CV chondrites, and experienced some mixing or brecciation process after (or during) alteration.
- 国立極地研究所の論文
著者
-
Akai Junji
Department Of Geology And Mineralogy Faculty Of Science Niigata University
-
Akai Junji
Department Of Earth Sciences Faculty Of Science Niigata University
-
AKAI JUNJI
Department of Geology and Mineralogy, Faculty of Science, Niigata University
関連論文
- Crystal orientation analyses of biominerals using Kikuchi patterns in TEM
- Twinned aragonite crystals found in the bivalvian crossed lamellar shell structure
- Calcic analog of clinojimthompsonite ftom the Oeyama Ophiolite,Southwest Japan
- Four-layer orthorhombic polytype (4O) in strontio-joaquinite group minerals found in the Ohmi region, central Japan
- Strontium, barium and titanium-bearing minertals and their host rocks form Ohmi, Japan
- Brockite form Ishikawa, Fukusima Prefectur, Japan
- Shock effects experiments on serpentine and thermal metamorphic conditions in Antarctic carbonaceous chondrite
- HRTEM OBSERVATION OF NEW COMPLEX POLYTYPE OF BIOTITE FROM DACITES IN HIGASHIYAMA HILLS, NIIGATA, CENTRAL JAPAN
- Void structures in olivine grains in thermally metamorphosed Antarctic carbonaceous chondrite B-7904
- TEM observation of void-like defect structures in matrix-and isolated-olivine grains in Allende (CV3)
- Sources of organic carbon and depositional environment in the Bengal delta plain sediments during the Holocene period
- Mineralogical consideration of possible microfossils in martian meteorite ALH84001
- Ultrastructural observations of dental epithelial cells and enameloid during enameloid mineralization and maturation stages in stingrays, Urolophus aurantiacus, an elasmobranch
- T-T-T diagram of serpentine and saponite, and estimation ofmetamorphic heating degree of Antarctic carbonaceous chondrites
- Mineralogical evidence of heating events in Antarctic carbonaceous chondrites, Y-86720 and Y-82162
- Carbon materials in Antarctic and nonAntarctic carbonaceous chondrites : high-resolution transmission electron microscopy
- High resolution electron microscopic characterization of phyllosilicates and finding of a new type with 11Å structure in Yamato-74662
- Calcium distribution in alkali feldspar of a quartz syenite from Cape Ashizuri, Shikoku, southwest Japan
- Mineralogical study of matrix- and groundmass-phyllosilicates, and isolated olivines in Yamato-791198 and -793321: With special reference to new finding of 14 Å chlorite in groundmass