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Hourglass sector zoning in metamorphic tourmaline and resultant major and trace-element fractionation

Abstract:

A new type of sector zoning, with an hourglass shape, has been identified in metamorphic tourmalines that formed under a wide variety of physical and chemical conditions. The two sectors in the c-direction are not equivalent due to asymmetry in the crystal structure of tourmaline along the c-axis. The c+ sector is characterized by low concentrations of Ti, Ca, Mg, and Na, although Al is high, and has a pale (commonly blue or pale-green) color. Conversely, the c- sector is low in Mg and Al, an...

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Publication status:
Published

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Publisher copy:
10.2138/am.2006.1920

Authors


Van Hinsberg, VJ More by this author
Schumacher, JC More by this author
Mason, PRD More by this author
Journal:
AMERICAN MINERALOGIST
Volume:
91
Issue:
5-6
Pages:
717-728
Publication date:
2006
DOI:
ISSN:
0003-004X
URN:
uuid:0a00288f-ffc9-494e-9e13-98458c1785e3
Source identifiers:
184851
Local pid:
pubs:184851

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