Petrology and mineralogy of the Ningqiang carbonaceous chondrite

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 天体化学和行星科学实验室

	Petrology and mineralogy of the Ningqiang carbonaceous chondrite
	Wang, Ying1 ; Hsu, Weibiao 1,2
刊名	METEORITICS & PLANETARY SCIENCE
	2009-05-01
卷号	44 期号:5 页码:763-780
关键词	ALUMINUM-RICH INCLUSIONS ANOMALOUS CV CHONDRITE EARLY SOLAR-SYSTEM REFRACTORY INCLUSIONS GENETIC LINKS FERROMAGNESIAN CHONDRULES CONTEMPORANEOUS FORMATION OPAQUE ASSEMBLAGES TYPE-3 CHONDRITES CLASSIFICATION
ISSN号	1086-9379
英文摘要	We report detailed chemical, petrological, and mineralogical studies on the Ningqiang carbonaceous chondrite. Ningqiang is a unique ungrouped type 3 carbonaceous chondrite. Its bulk composition is similar to that of CV and CK chondrites, but refractory lithophile elements (1.01 x CI) are distinctly depleted relative to CV (1.29 x CI) and CK (1.20 x CI) chondrites. Ningqiang consists of 47.5 vol% chondrules, 2.0 vol% Ca,Al-rich inclusions (CAls), 4.5 vol% amoeboid olivine aggregates (AOAs), and 46.0 vol% matrix. Most chondrules (95%) in Ningqiang are Mg-rich. The abundances of Fe-rich and Al-rich chondrules are very low. Al-rich chondrules (ARCs) in Ningqiang are composed mainly of olivine, plagioclase, spinel, and pyroxenes. In ARCs, spinel and plagioclase are enriched in moderately volatile elements (Cr, Mn, and Na), and low-Ca pyroxenes are enriched in refractory elements (Al and Ti). The petrology and mineralogy of ARCs in Ningqiang indicate that they were formed from hybrid precursors of ferromagnesian chondrules mixed with refractory materials during chondrule formation processes. We found 294 CAls (55.0% type A, 39.5% spinel-pyroxene-rich, 4.4% hibonite-rich, and several type C and anorthite-spinel-rich inclusions) and 73 AOAs in 15 Ningqiang sections (equivalent to 20 cm(2) surface area). This is the first report of hibonite-rich inclusions in Ningqiang. They are texturally similar to those in CM, CH, and CB chondrites, and exhibit three textural forms: aggregates of euhedral hibonite single crystals, fine-grained aggregates of subhedral hibonite with minor spinel, and hibonite +/- Al,Ti-diopside +/- spinel spherules. Evidence of secondary alteration is ubiquitous in Ningqiang. Opaque assemblages, formed by secondary alteration of pre-existing alloys on the parent body, are widespread in chondrules and matrix. On the other hand, nepheline and socialite, existing in all chondritic components, formed by alkali-halogen metasomatism in the solar nebula.
学科主题	Geochemistry & Geophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geochemistry & Geophysics
研究领域[WOS]	Geochemistry & Geophysics
关键词[WOS]	ALUMINUM-RICH INCLUSIONS ; ANOMALOUS CV CHONDRITE ; EARLY SOLAR-SYSTEM ; REFRACTORY INCLUSIONS ; GENETIC LINKS ; FERROMAGNESIAN CHONDRULES ; CONTEMPORANEOUS FORMATION ; OPAQUE ASSEMBLAGES ; TYPE-3 CHONDRITES ; CLASSIFICATION
收录类别	SCI
语种	英语
WOS记录号	WOS:000268532400009
公开日期	2011-12-08
内容类型	期刊论文
源URL	[http://159.226.72.40/handle/332002/1571]
专题	紫金山天文台_天体化学和行星科学实验室
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Lunar & Planetary Sci Ctr, Lab Astrochem & Planetary Sci, Nanjing 210008, Peoples R China 2.China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ying,Hsu, Weibiao. Petrology and mineralogy of the Ningqiang carbonaceous chondrite[J]. METEORITICS & PLANETARY SCIENCE,2009,44(5):763-780.
APA	Wang, Ying,&Hsu, Weibiao.(2009).Petrology and mineralogy of the Ningqiang carbonaceous chondrite.METEORITICS & PLANETARY SCIENCE,44(5),763-780.
MLA	Wang, Ying,et al."Petrology and mineralogy of the Ningqiang carbonaceous chondrite".METEORITICS & PLANETARY SCIENCE 44.5(2009):763-780.