| Reference Type | Journal (article/letter/editorial) |
|---|
| Title | Fluorine in igneous rocks and minerals with emphasis on ultrapotassic mafic and ultramafic magmas and their mantle source regions |
|---|
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
|---|
| Authors | Edgar, A. D. | Author |
|---|
| Pizzolato, L. A. | Author |
| Sheen, J. | Author |
| Year | 1996 (April) | Volume | 60 |
|---|
| Issue | 399 |
|---|
| Publisher | Mineralogical Society |
|---|
| Download URL | https://rruff.info/doclib/MinMag/Volume_60/60-399-243.pdf+ |
|---|
| DOI | doi:10.1180/minmag.1996.060.399.01Search in ResearchGate |
|---|
| Generate Citation Formats |
|---|
| Mindat Ref. ID | 25 | Long-form Identifier | mindat:1:5:25:7 |
|---|
|
| GUID | 0 |
|---|
| Full Reference | Edgar, A. D., Pizzolato, L. A., Sheen, J. (1996) Fluorine in igneous rocks and minerals with emphasis on ultrapotassic mafic and ultramafic magmas and their mantle source regions. Mineralogical Magazine, 60 (399) 243-257 doi:10.1180/minmag.1996.060.399.01 |
|---|
| Plain Text | Edgar, A. D., Pizzolato, L. A., Sheen, J. (1996) Fluorine in igneous rocks and minerals with emphasis on ultrapotassic mafic and ultramafic magmas and their mantle source regions. Mineralogical Magazine, 60 (399) 243-257 doi:10.1180/minmag.1996.060.399.01 |
|---|
| In | (1996, April) Mineralogical Magazine Vol. 60 (399) Mineralogical Society |
|---|
| Abstract/Notes | AbstractIn reviewing the distribution of fluorine in igneous rocks it is clear that F abundance is related to alkalinity and to some extent to volatile contents. Two important F-bearing series are recognized: (1) the alkali basalt—ultrapotassic rocks in which F increases with increasing K2O and decreasing SiO2 contents; and (2) the alkali basalt—phonolite—rhyolite series with F showing positive correlation with both total alkalis and SiO2. Detailed studies of series (1) show that F abundance in ultrapotassic magmas (lamproite, kamafugite, lamprophyre) occurs in descending order in the sequence phlogopite>apatite>amphibole>glass. Fluorine contents in the same minerals from fresh and altered mantle xenoliths may be several orders of magnitude less than those in the host kamafugite. For many lamproites, F contents correlate with higher mg# suggesting that F is highest in the more primitive magmas.Experiments at mantle conditions (20 kbar, 900–1400°C) on simplified F-bearing mineral systems containing phlogopite, apatite, K-richterite, and melt show that F is generally a compatible element. Additionally, low F abundance in minerals from mantle xenoliths suggests that F may not be available in mantle source regions and hence is unlikely to partition into the melt phase on partial melting. Melting experiments on the compositions of F-free and F-bearing model phlogopite harzburgite indicate that even small variations in F content produce melts similar in composition to those of lamproite. |
|---|
These are possibly similar items as determined by title/reference text matching only.
