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Distribution of rutile in metamorphic rocks and implications for placer deposits

Mineralium Deposita

By:
and
DOI: 10.1007/BF00206567

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Abstract

Pelitic units in the eastern Great Smoky Mountains of the North Carolina Blue Ridge contain rutile grains only in kyanite and higher zones. Adjacent non-pelitic rocks do not contain rutile at kyanite grade but commonly contain sphene. Detrital rutile breaks down at metamorphic grades lower than those at which metamorphic rutile forms. Similarly, pelitic rocks in southeastern Connecticut contain rutile grains above, but not below, the sillimanite isograd. Most non-pelitic rocks there contain rutile only in the hypersthene zone. The slight difference in behavior of rutile in the two terranes is attributed primarily to a slight difference in calcium content of the pelites. In both areas, rutile commonly appears first as inclusions in garnet. Geologic maps showing metamorphic and stratigraphic or compositional information should be useful as prospecting tools for placer deposits. A variety of rocks at granulite facies and pelitic rocks of the upper amphibolite facies contain rutile and these could provide an extensive source for rutile in rutile placer deposits. ?? 1978 Springer-Verlag.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Distribution of rutile in metamorphic rocks and implications for placer deposits
Series title:
Mineralium Deposita
DOI:
10.1007/BF00206567
Volume
13
Issue:
3
Year Published:
1978
Language:
English
Publisher location:
Springer-Verlag
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Mineralium Deposita
First page:
329
Last page:
343