Physical and Petrologic Properties of Ordinary Chondrites and Their Taxonomic Parameters
详细信息
- 责任者：Wang Daode (Key Laboratory of Isotope Geochronology and Geochemistry ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Wang Guiqin
- 刊名：Geochimica
- 出版年：2011
- 卷期：40(1)
- 关键词：球粒陨石 ; chondrites
- 页码：p.35-44
- 图表：5 illus., 8 tables, 38 refs.
- 分类号：0100
- issnNo：ISSN0379-1726
- isbnNo：CN44-1398/P
摘要
The physical and petrologic properties of the different chondrite groups, including mean size of the chondrules, proportions of the chondrule textural types, proportions of compound chondrule, the proportions of chondrules with igneous rims, and the proportions of chondrules that contain sulfide, chemical compositions and mineral features derived from the early solar nebula are used to classify chemical-petrologic types and asteroids.These properties provided useful taxonomic parameters for different chondrite group (EH, EL, H, L, LL, R, CV, CK, CR, CM, CO) and the information of their formation environment in which chondrules formed.There is correlation between -170 and heliocentric distance for these chondrite groups. Thus, different chondrite groups may be put in the order of EH-EL, OC (H, L, LL), R, CR, CV-CK, CM-CO, with increasing heliocentric formation distance, based on the amount of dust present where they formed and -170 values of different chondrite groups. The authors infer that continual chemical fractionation occurred in the early solar system.