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Trace elements in Thai gem corundums.

Saminpanya, S.; Manning, D. A. C.; Droop, G. T. R.; Henderson, C. M. B

Journal of Gemmology. 2003;28(7):399-415.

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Abstract

Thai gem corundums fall into two discrete populations on the basis of their trace element fingerprinting. Sapphires are rich in Ga (up to 0.101 wt % Ga2O3) and poor in Cr (<0.053 wt% Cr2O3) whereas rubies are rich in Cr (up to 0.564 wt% Cr2O3) and poor in Ga (<0.009 wt% Ga2O3). The trace element study of corundums from well-characterized geol. environments suggests that Thai sapphires crystd. from syenitic gneiss metasomatized by a highly evolved magma such as carbonatite. Rubies could have crystd. in a metamorphic environment probably in a pre-existing metamorphic rock with mafic compn. [on SciFinder (R)]

Keyword(s)

Trace elements Role: GOC (Geological or astronomical occurrence), GPR (Geological or astronomical process), OCCU (Occurrence), PROC (Process) (geol. indicator, in ruby and sapphire gemstones trace elements in sapphire and ruby gemstones of Thailand) Gemstones Role: GPR (Geological or astronomical process), PRP (Properties), PROC (Process) (ruby and sapphire trace elements in sapphire and ruby gemstones of Thailand) Metabasite Role: GPR (Geological or astronomical process), PROC (Process) (ruby parent rock trace elements in sapphire and ruby gemstones of Thailand) Gneiss Metasomatic rocks Metasyenite Role: GPR (Geological or astronomical process), PROC (Process) (syenitic gneiss, sapphire parent rock trace elements in sapphire and ruby gemstones of Thailand)

Bibliographic metadata

Type of resource:
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Publication type:
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Published date:
Journal title:
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Volume:
28
Issue:
7
Start page:
399
End page:
415
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:1a1852
Created:
6th August, 2009, 09:33:48
Last modified by:
Droop, Giles
Last modified:
15th September, 2014, 18:21:47

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