About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Statistical Application of Plagioclase Extinction in Provenance Studies: NOTES
I. F. Ermanovics
ABSTRACT
Estimating the determining composition of plagioclase by a rapid extinction method using albite twin lamellae 010 is successful, when treated statistically and cautiously, in establishing provenance area of a sediment. The method involves recording all symmetrical extinction angles of albite twin lamellae. It differs from the Michel-Levy method which records only the maximum value for each thin section. Recording all symmetrical extinction angles allows the detection of a polymodal population of plagioclase compositions. The apparent anorthite content of plagioclase ("An") in two conglomerate horizons and three granite bodies is used: (1) to relate conglomerate horizons separated by a body of water, (2) to relate both conglomerat
horizons to a common provenance area (two of the granite bodies), and (3) to show assimilation of the conglomerate into the third granite body, allowing areal extension of the conglomerate palaeo-environment.
The usefulness of this approach is limited.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 | |
Open PDF Document: $24 |