干旱区生态环境知识资源中心(Arid): 10块新疆哈密沙漠陨石的类型及其岩石矿物学特征

Arid

	10块新疆哈密沙漠陨石的类型及其岩石矿物学特征
其他题名	Classification of 10 meteorites from Hami in Xinjiang: Petrology and mineralogy
	赖永旺; 王桂琴
来源期刊	地球化学
ISSN	0379-1726
出版年	2015
卷号	44 期号:3 页码:301-310
中文摘要	沙漠是除南极地区之外的另一陨石样品的主要来源地。我国拥有面积辽阔的沙漠,为陨石的收集提供了有利的地理条件。2013年5月,在首次新疆库姆塔格沙漠陨石考察中,发现并收集到46块陨石样品,确定了3个陨石富集区:Hami、Alatage Mountain (AM)和Kumtag。对其中的10块代表性陨石样品进行了矿物岩石学研究,在此基础上确定了它们的化学群、岩石类型、冲击变质程度和风化程度。10块库姆塔格陨石均为普通球粒陨石,其中1块样品Kumtag014(Fa摩尔百分比为9.1~48.3,相对标准偏差PMD为51.0; Fs摩尔百分比为2.8?30.3,PMD为54.2)属于非平衡型L群。依据橄榄石Fa的PMD将其进一步划分为3.4亚型,属于相当原始的球粒陨石样品。另外9块经历了明显的热变质作用,为5型普通球粒陨石,包括7块L群(Fa 22.6~25.9, Fs 17.6~21.4)和2块H群(Fa 18.2~20.8, Fs 16.0?17.8)。这些陨石的冲击变质程度:5块S3型,4块S2型,1块S1型;风化程度:3块W1型,6块W2型,1块W3型。
英文摘要	In addition to the Antarctic, desert is the main source of meteorites. China has a vast desert area which provides favorable geographical conditions for collection of meteorites. In total 46 meteorite samples were found and collected in Kumtag, Xinjiang in May 2013, and this is the first time for organized meteorites hunting in desert conducted by specialists. Three meteoritic concentration areas were ascertained in our search scope: Hami, Alatage Mountain (AM) and Kumtag. In this study, 10 representative meteorites were selected from these three areas, and were classified in terms of chemical group, petrographic type, shock stage and weathering scale based on their petrography and mineral chemistry. These ten desert meteorites were found to be all ordinary chondrite meteorites. Among them Kumtag014 (Fa 9.1 ?48.3, PMD 51.0; Fs 2.8?30.3,PMD 54.2) is an unequilibrated ordinary chondrite, belonging to L3.4 group, while the other nine equilibrated ordinary chondrites belong to type 5, covering L groups (Fa 22.6?25.9,Fs 17.6?21.4) for 7 samples and H groups (Fa 18.2?20.8,Fs 16.0?17.8) for 2 samples. The shock metamorphic stages for most chondrites are generally low: five being S3, four S2 and one S1. The weathering degrees for these chondrites are mostly limited: W1 for three of them, W2 for six and only one for W3.
中文关键词	沙漠陨石 ; 陨石分类 ; 岩石学 ; 矿物成分
英文关键词	desert meteorites classification petrography mineral chemistry
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:5424543
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232498
作者单位	中国科学院广州地球化学研究所, 同位素地球化学国家重点实验室, 广州, 广东 510640, 中国
推荐引用方式 GB/T 7714	赖永旺,王桂琴. 10块新疆哈密沙漠陨石的类型及其岩石矿物学特征[J],2015,44(3):301-310.
APA	赖永旺,&王桂琴.(2015).10块新疆哈密沙漠陨石的类型及其岩石矿物学特征.地球化学,44(3),301-310.
MLA	赖永旺,et al."10块新疆哈密沙漠陨石的类型及其岩石矿物学特征".地球化学 44.3(2015):301-310.