DISCRIMINANT ANALYSIS APPLIED TO ESTABLISH MAJOR-ELEMENT FIELD BOUNDARIES FOR TECTONIC VARIETIES OF BASIC ROCKS
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dc.contributor.author | Agrawal S. | |
dc.contributor.author | Guevara M. | |
dc.contributor.author | Verma S.P. | |
dc.date.accessioned | 2022-10-24T08:25:12Z | |
dc.date.available | 2022-10-24T08:25:12Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=31419998 | |
dc.identifier.citation | International Geology Review, 2004, 46, 7, 575-594 | |
dc.identifier.issn | 0020-6814 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/39032 | |
dc.description.abstract | The statistical method of linear discriminant analysis has been applied to distinguish Pliocene to Recent basic rocks on the basis of their major-element composition. Studied basic rock suites are from four tectonic settings: island arc, continental rift, ocean island, and mid-ocean ridge. Field boundaries were derived by computing probability functions replacing the past practice of fitting lines by "eye." Highly successful discrimination diagrams have been obtained. A testing set shows that the rate of correct classification ranges from 76% to 96%, and from 80% to 92% when three and four tectonic groups are considered at a time, respectively. The high potential of this approach to identify different tectonic settings for basic rocks is only reduced by the complex tectonic history shown by a few of the compiled samples, by crustal contamination effects in some basic rock samples, and the similarities of mantle sources tapped in different tectonic settings. | |
dc.title | DISCRIMINANT ANALYSIS APPLIED TO ESTABLISH MAJOR-ELEMENT FIELD BOUNDARIES FOR TECTONIC VARIETIES OF BASIC ROCKS | |
dc.type | Статья |
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