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Browsing Геология России by Author "Yamaguchi A."

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FELDSPATHIC CLASTS IN YAMATO-86032: REMNANTS OF THE LUNAR CRUST WITH IMPLICATIONS FOR ITS FORMATION AND IMPACT HISTORY

Nyquist L.; Bogard D.; Yamaguchi A.; Shih C.Y.; Karouji Y.; Ebihara M.; Reese Y.; Garrison D.; McKay G.; Takeda H. (2006)

Low concentrations of Th and Fe in the Yamato (Y)-86032 bulk meteorite support earlier suggestions that Y-86032 comes from a region of the moon far distant from the Procellarum KREEP Terrain (PKT), probably from the lunar ...
MONOMINERALIC MOBILIZATION OF PLAGIOCLASE BY SHOCK: AN EXPERIMENTAL STUDY

Yamaguchi A.; Sekine T. (2000)

Shock recovery experiments of plagioclase feldspar in contact with pyroxene, shock-loaded at 36-53 GPa, showed that monomineralic glass of plagioclase was mixed with brecciated pyroxenes with virtual absence of mixed-mineral ...
POST-CRYSTALLIZATION REHEATING AND PARTIAL MELTING OF EUCRITE EET90020 BY IMPACT INTO THE HOT CRUST OF ASTEROID 4VESTA ~4.50 GA AGO

Yamaguchi A.; Taylor G.J.; Keil K.; Floss C.; Crozaz G.; Nyquist L.E.; Bogard D.D.; Garrison D.H.; Reese Y.D.; Wiesmann H.; Shih C.Y. (2001)

We performed petrologic, radiometric (Ar-Ar, Sm-Nd, and Mn-Cr ages), and ion microprobe studies of the basaltic eucrite, EET90020. This is one of the few rare basaltic eucrites whose 39Ar-40Ar age has not been reset during ...
U-PB AND 207PB-206PB AGES OF ZIRCONS FROM BASALTIC EUCRITES: IMPLICATIONS FOR EARLY BASALTIC VOLCANISM ON THE EUCRITE PARENT BODY

Misawa K.; Yamaguchi A.; Kaiden H. (2005)

We have undertaken petrologic and SHRIMP U-Th-Pb isotopic studies on zircons from basaltic eucrites (Yamato [Y]-75011, Y-792510, Asuka [A]-881388, A-881467 and Padvarninkai) with different thermal and shock histories. ...

Browsing Геология России by Author "Yamaguchi A."

Browsing Геология России by Author "Yamaguchi A."

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