URGENT MESSAGE: We need $75,000 to survive. Click here to find out why.
主页关于 MindatMindat手册Mindat的历史版权Who We Are联系我们于 Mindat.org刊登广告
捐赠给 MindatCorporate Sponsorship赞助板页已赞助的板页在 Mindat刊登 广告的广告商于 Mindat.org刊登广告
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
Mindat手册添加新照片Rate Photos产区编辑报告Coordinate Completion Report添加词汇表项目
统计The Elements会员列表书籍及杂志Mineral Museums矿物展及活动The Mindat目录表设备设置
照片搜索Photo Galleries今天最新的照片昨天最新的照片用户照片相集过去每日精选照片相集

Happy Canyon meteorite, Armstrong Co., Texas, USA

This page is currently not sponsored. Click here to sponsor this page.
Enstatite Chondrite, low-iron [EL6/7; S2]
1971 find, 16.3 kg; highly weathered

The Happy Canyon meteorite was plowed up on a farm and identified as a meteorite. In spite of severe weathering which has removed much of the exterior and allowed carbonate-rich veins to penetrate the interior, the remaining mass preserves both a clear meteoritic identity and has provoked some controversy about its preferred classification. The main constituents of the meteorite are Enstatite (~85 vol%), Plagioclase (Oligoclase), Enstatite (5-10 vol%), and minor diopside. In addition, minor amounts of troilite and Ni-Fe metal have (partially) survived the weathering processes. In sum, the meteorite has the bulk chemistry of a weathered Enstatite Chondrite — most likely, an member of the EL (low-iron) chemical group. It would seem that the absence of oldhamite, Daubreélite, and other reduced sulfides would be but the natural consequence of weathering over a period of several centuries.

We have, however, left the best for last. This meteoritic stone consists primarily of euhedral crystals of enstatite. There are no chondrules and, in the first reports at least, no relics of chondrules. The conundrum as stated by Olsen et al., (1977) is that “The bulk composition is that of an (E6) enstatite chondrite, however, it has the texture of a crystal cumulate…” One might explain this curious phenomenon as due to burial of EL6 material or, as has, been the custom lately, as an instance of ‘shock melting’ — melting due to violent pre-terrestrial impact(s) on the original Enstatite Chondrite homeworld(s). Before the reader draws his or her own conclusions, the descriptive article by Olsen et al. provides an excellent starting point.

Descriptive Reference:
Olsen, E. J., Bunch, T. E., Jarosewich, E., Noonan, A. F. & Huss, G. I. (1977) Happy Canyon - A new type of enstatite achondrite, Meteoritics 12 (2), 109-123. (June 1977)

Mineral List

9 entries listed. 6 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Clarke, R. S. [Ed.] (1976). Meteoritical Bulletin, No. 54. Meteoritics 11 (1): 69-93 (March 1976).

Olsen, E., Bunch, T., Jarosewich, E. & Huss, G. I. (1976) Happy Canyon: An E-7 enstatite chondrite (abstract), Meteoritics 11 (4): 348-349. (Dec 1976)

Olsen, E. J., Bunch, T. E., Jarosewich, E., Noonan, A. F. & Huss, G. I. (1977) Happy Canyon - A new type of enstatite achondrite, Meteoritics 12 (2), 109-123. (June 1977)

Watters, T. R. & Prinz, M (1979) Aubrites - Their origin and relationship to enstatite chondrites. In: Lunar and Planetary Science Conference, 10th, Houston, Tex., March 19-23, 1979, Proceedings. Volume 1. (A80-23557 08-91) New York, Pergamon Press, Inc., 1979, p. 1073-1093.

McCoy, T. J. et al., (1995) Origin and history of impact-melt rocks of enstatite chondrite parentage, Geochimica et Cosmochimica Acta 59, #1, 161-175. (Jan 1995)

Grady, M. M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

Boesenberg, J. S., Weisberg, M. K., Greenwood, R. C., Gibson, J. M. & Franchi, I. A. (2014) The Anomalous Enstatite Meteorites — Part 2: The Recrystallized EL Meteorites, Lunar and Planetary Science Conference XXXXV. LPI Contribution No. 1777, p.1486. (March 2014)

External Links

矿物 and/or 产地  
版权所有© mindat.org1993年至2018年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 Current server date and time: 2018.6.22 04:13:36 Page generated: 2015.7.17 22:47:51
Go to top of page