Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
|---|---|
| Title | A ferroan region of the lunar highlands as recorded in meteorites MAC88104 and MAC88105 |
| Creator/Author | Jolliff, B.L. ; Korotev, R.L. ; Haskin, L.A. (Washington Univ., St. Louis, MO (United States)) |
| Publication Date | 1991 Nov 01 |
| OSTI Identifier | OSTI ID: 5142292 |
| Report Number(s) | CONF-9003166-- |
| DOE Contract Number | FG02-82ER10275 |
| Other Number(s) | Journal ID: ISSN 0016-7037; CODEN: GCACA |
| Resource Type | Conference |
| Specific Type | Journal Article |
| Resource Relation | Journal: Geochimica et Cosmochimica Acta; (United States); Journal Volume: 55:11; Conference: 21. lunar and planetary science conference, Houston, TX (United States), Mar 1990 |
| Subject | 58 GEOSCIENCES; LUNAR MATERIALS; CHEMICAL COMPOSITION; PETROGENESIS; METEORITES; MINERALOGY; PETROLOGY; ANORTHOSITES; ELEMENT ABUNDANCE; GEOLOGIC HISTORY; IRON COMPOUNDS; QUANTITY RATIO; ABUNDANCE; GABBROS; GEOLOGY; IGNEOUS ROCKS; MATERIALS; PLUTONIC ROCKS; ROCKS; TRANSITION ELEMENT COMPOUNDS |
| Description/Abstract | MacAlpine Hills 88104 and 88105 (MAC88104/5) are paired meteorites of noritic anorthosite composition from the lunar highlands. MAC88105 is a breccia composed mainly of melt-breccia clasts in a fine-grained, fragmental, and partly glassy matrix. The most abundant melt lithologies are feldspathic and are similar in composition to the bulk meteorite. Other melt lithologies include feldspathic melt rocks, mafic melt breccias, and a rare melt breccia relatively enriched in incompatible trace elements. Subordinate lithic clasts are granulitic breccias and ferroan (relatively low Mg/(Mg + Fe)) igneous lithologies, including troctolitic anorthosite, anorthositic norite, gabbronorite, and anorthosite. Igneous clasts having mafic mineral compositions more magnesian than Fo{sub 55} and En{sub 60} were not observed. Rare fragments of glass spheres and shards as well as glass clasts indicate that the meteorite was derived from an immature regolith. The bulk composition of MAC88105 is characterized by a molar Mg/(Mg + Fe) ratio of 0.62, at the extreme low end of the range for meteorites from the lunar highlands. Its low concentrations of incompatible trace elements and feldspathic bulk composition (29% Al{sub 2}O{sub 3}), suggests that it, like the other lunar meteorites, formed at a site far removed from the areas sampled by the Apollo missions. Similarities in mineral compositions among the different lithologies of the breccia and the distribution of mineral fragments suggest that most components of the meteorite were derived from a crustal section dominated by material with a noritic anorthosite composition and an affinity of the ferroan suite of plutonic rocks. |
| Country of Publication | United States |
| Language | English |
| Format | Size: Pages: 3051-3071 |
| System Entry Date | 2007 Feb 06 |
Top | |
 |
Information
Bridge • Energy
Citations Database • E-print
Network • R&D
Accomplishments
About OSTI Science.gov • USA.gov • USAJOBS • Grants • Regulations.gov |
 |
|---|
Last Updated: 02/10/2009