A DISCUSSION ON SOME ANTARCTIC QUASI-C1 CHONDRITES ORIGIN AND RANGE OF NEBULAR HYDROUS EFFECT
Received date: 1994-08-15
Revised date: 1994-09-26
Online published: 1995-08-01
Because of containing many phyllosilicate aggregates and similar oxygen isotopic composition to C1 carbonaceous chondrite, the Antarctic carbonaceous chondrite, Y-82162, Y-86720, Belgica-7904，PCA-91082, Y-793495 and Y-8449 are called as quasi-C1 chondrite. In these carbonaceous chondrites the phyllosilicate aggregates exist as four forms: (1)matrix, (2)clast with same composition of matrix, (3)chondrule, (4)dark inclusion. This four forms are independence relatively in meteorite, so the hydrous effect must take place after nebular condensation and before meteorite parent body formation. Besides phyllosilicate aggregates, some higher temperature condensates or their remainder, for example, non-completely hydrous chondrite, anhydrous silicate mineral and their aggregate, appear in these meteorites. In different meteorite the composations of higher temperature condensate remainder are various, from enstatite, silica mineral, to moderate Fe-rich o-livine, Fe-rich olivine. According to above evidences and this fact that water has been observed on Mar, Earth and Mercury, we consider that range of nebular hydrous effect could be wide, including terrestrial planet region and asteroids region of solar nebular.
Hou Wei, Ouyang Ziyuan . A DISCUSSION ON SOME ANTARCTIC QUASI-C1 CHONDRITES ORIGIN AND RANGE OF NEBULAR HYDROUS EFFECT[J]. Advances in Earth Science, 1995 , 10(4) : 373 -377 . DOI: 10.11867/j.issn.1001-8166.1995.04.0373
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