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Heavy-mineral variability in bottom sediments of the lower Chesapeake Bay, Virginia

Marine Geology
By: , and 

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Abstract

Heavy minerals in bottom-sediment samples of the lower Chesapeake Bay show distribution patterns and interrelationships that denote characteristic mineral suites associated with defined geographic provinces. The Baymouth province has a garnet-hornblende-pyroxene suite, which is largely attributed to the influx of littoral and shelf sediments; the Eastern Shore province has a similar suite, derived largely from coastal erosion of the Eastern Shore peninsula. The Northern and Combined River provinces have a zircon-tourmaline-staurolite assemblage, which reflects derivation from an Appalachian Piedmont-Atlantic Coastal Plain sourceland. The Western Shore province is associated with a zircon-epidote-staurolite assemblage, apparently derived jointly from tributary influx and coastal erosion of the western shore. Factor analysis identified two major factors that account for 63% of the total variation in the relative amounts of the seven most common heavy minerals. The dominant factor (44%) is based on a zircon-hornblende-staurolite-pyroxene relationship, which indicates that mineral stability, as influenced by sediment maturity, is a major contributing factor. The second factor (19%) based on a tourmaline-epidote-staurolite-garnet relationship indicates that provenance is another major cause of heavy-mineral variability within the lower bay. ?? 1977.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Heavy-mineral variability in bottom sediments of the lower Chesapeake Bay, Virginia
Series title Marine Geology
Volume 23
Issue 3
Year Published 1977
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Marine Geology
First page 217
Last page 235
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