Macusanite occurrence, age, and composition, Macusani, Peru
Bulletin of the Geological Society of America
By: Virgil E. Barnes, George Edwards, W. A. McLaughlin, Irving Friedman, and Oiva Joensuu
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Abstract
Macusanite, originally believed to be a type of tektite because of its sculpture, is shown to be related to sillar of the Macusani region, Peru. K-Ar measurements establish identical Pliocene ages (4.2 m.y.) for macusanite and sillar and relate these deposits to the extensive ash flows of the southern Andes. These rocks are unique for glassy rocks in that lithium, boron, and arsenic contents are very high; cesium, rubidium, tellurium, fluorine, and tin are higher than normal; zinc, copper, chromium, and zirconium are lower than normal; and high-alumina minerals such as andalusite are present.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Macusanite occurrence, age, and composition, Macusani, Peru |
| Series title | Bulletin of the Geological Society of America |
| DOI | 10.1130/0016-7606(1970)81[1539:MOAACM]2.0.CO;2 |
| Volume | 81 |
| Issue | 5 |
| Year Published | 1970 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 8 p. |
| First page | 1539 |
| Last page | 1546 |
| Country | Peru |
| City | Macusani |
| Other Geospatial | Andes Mountains |
| Google Analytic Metrics | Metrics page |