| 11573 |
Creator |
4989dd10527e94ef140e45e8c9fb07e6 |
| 11573 |
Creator |
d031e8048206102a070ef3064a0a75b0 |
| 11573 |
Creator |
ext-c40a4e9e4343c7cfe6e6a537a0aebded |
| 11573 |
Date |
2007-12 |
| 11573 |
Is Part Of |
repository |
| 11573 |
Is Part Of |
p0026461X |
| 11573 |
abstract |
Germanium abundances, determined by laser ablation-inductively coupled plasma-mass
spectrometry, are presented for phenocrysts and glass matrices from a metaluminous
trachyte and four peralkaline rhyolites from the Greater Olkaria Volcanic Complex,
Kenya Rift Valley, Africa. Abundances (in ppm) are: sanidine 0.45-0.61; fayalite 4.8-11.7;
hedenbergite 5.1-9.0; titanomagnetite 2.7; ilmenite 0.48; amphibole 8.3-8.9; biotite
7.0; chevkinite-(Ce) 309; trachyte glass 3.0; rhyolitic glasses 2.3-3.9. These values
are generally greater than those recorded for silicic rocks in the literature, whilst
the chevkinite-(Ce) value is the largest yet found in a magmatic mineral. Apparent
partition coefficients range from 0.15-0.26 in sanidine to 124 in chevkinite-(Ce).
Those for fayalite and hedenbergite increase with whole-rock peralkalinity and Fe
content. The possibility of a role for accessory phases in influencing Ge distribution
in rock-forming minerals is also raised. |
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authorList |
authors |
| 11573 |
issue |
6 |
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status |
peerReviewed |
| 11573 |
uri |
http://data.open.ac.uk/oro/document/16912 |
| 11573 |
uri |
http://data.open.ac.uk/oro/document/18315 |
| 11573 |
uri |
http://data.open.ac.uk/oro/document/4629 |
| 11573 |
uri |
http://data.open.ac.uk/oro/document/8582 |
| 11573 |
volume |
71 |
| 11573 |
type |
AcademicArticle |
| 11573 |
type |
Article |
| 11573 |
label |
Macdonald, R.; Rogers, N. W and Tindle, A. G. (2007). Distribution of germanium
between phenocrysts and melt in peralkaline rhyolites from the Kenya Rift Valley.
Mineralogical Magazine, 71(6) pp. 703–713. |
| 11573 |
label |
Macdonald, R.; Rogers, N. W and Tindle, A. G. (2007). Distribution of germanium
between phenocrysts and melt in peralkaline rhyolites from the Kenya Rift Valley.
Mineralogical Magazine, 71(6) pp. 703–713. |
| 11573 |
sameAs |
minmag.2007.071.6.703 |
| 11573 |
Title |
Distribution of germanium between phenocrysts and melt in peralkaline rhyolites from
the Kenya Rift Valley |
| 11573 |
in dataset |
oro |