Browsing ELibrary by Author "Takaoka N."

Now showing items 1-5 of 5

BULK MINERALOGY OF INDIVIDUAL MICROMETEORITES DETERMINED BY X-RAY DIFFRACTION ANALYSIS AND TRANSMISSION ELECTRON MICROSCOPY

Nakamura T.; Noguchi T.; Yada T.; Nakamuta Y.; Takaoka N. (2001)

Bulk mineralogy of individual fine-grained micrometeorites from 50 to 200 μm in diameter was determined on the basis of the powder X-ray diffraction patterns and the observation of internal textures by a transmission ...
EVALUATING THE THERMAL METAMORPHISM OF CM CHONDRITES BY USING THE PYROLYTIC BEHAVIOR OF CARBONACEOUS MACROMOLECULAR MATTER

Kitajima F.; Nakamura T.; Takaoka N.; Murae T. (2002)

The degrees of thermal metamorphism of 10 CM chondrites and of the Allende CV3 chondrite were evaluated from the viewpoint of ''graphitization'' of the carbonaceous macromolecular matter by means of flash pyrolysis-gas ...
HETEROGENEOUS DISTRIBUTION OF SOLAR AND COSMOGENIC NOBLE GASES IN CM CHONDRITES AND IMPLICATIONS FOR THE FORMATION OF CM PARENT BODIES

Nakamura T.; Nagao K.; Metzler K.; Takaoka N. (1999)

Distribution of solar, cosmogenic, and primordial noble gases in thin slices of Murchison, Murray, and Nogoya CM carbonaceous chondrites was determined by the laser microprobe analysis so as to put some constraints on the ...
MICRODISTRIBUTION OF PRIMORDIAL NOBLE GASES IN CM CHONDRITES DETERMINED BY IN SITU LASER MICROPROBE ANALYSIS: DECIPHERMENT OF NEBULAR PROCESSES - NOBLE GASES, CARBON AND AN ESCA STUDY

Nakamura T.; Nagao K.; Takaoka N. (1999)

In situ noble gas analyses using a laser microprobe with a beam diameter of 50-100 μm were performed on thin slices of Murchison and Yamato (Y-) 791198 CM carbonaceous chondrites in order to see microdistribution of ...
NOBLE GASES IN UREILITES RELEASED BY CRUSHING

Okazaki R.; Nakamura T.; Takaoka N.; Nagao K. (2003)

Noble gases in two ureilites, Kenna and Allan Hills (ALH) 78019, were measured with two extraction methods: mechanical crushing in a vacuum and heating. Large amounts of noble gases were released by crushing, up to 26.5% ...

Browsing ELibrary by Author "Takaoka N."

Browsing ELibrary by Author "Takaoka N."

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