%0 Journal Article
%T NaAlSi3O8-hollandite and other high-pressure minerals in the shock melt veins of the Suizhou meteorite
%A Xie Xiande
%A Chen Ming
%A Wang Deqiang
%A A. El Goresy
%J Chinese Science Bulletin
%@ 1861-9541
%D 2001
%I 
%R 10.1007/BF02900692
%X The Suizhou L6 chondrite contains a few very thin shock melt veins of 0.02¨C0.09 mm in width. In spite of small width of the veins, shock-induced high-pressure phases, such as coarse-grained NaAlSi3O8-hollandite, ringwoodite, majorite and fine-grained matrix majorite-pyropess have been discovered in these veins. NaAlSi3O8-hollandite, the high-pressure phase of plagioclase, in Suizhou shock veins occurs as a single phase mineral, no silicate glassy phase, such as albitic glass, was incorporated with it. The presence of above-mentioned high-pressure phases constrains the high pressure (up to 23¨C24 GPa) and high temperature (up to 1900¨C2000¡ãC) regime in Suizhou shock veins, and indicates that the duration of high-pressure regime in the veins should be long enough (a few seconds) for phase transformation and crystallization of minerals under pressure. The discovery of the first natural single-phase crystalline NaAlSi3O8-hollandite in Suizhou meteorite is of important significance in understanding the Earth¡¯s mantle geochemistry.
%K chondrite
%K shock vein
%K high-pressure phase
%K plagioclase
%K hollandite
%U http://link.springer.com/article/10.1007/BF02900692