| Reference Type | Journal (article/letter/editorial) |
|---|
| Title | Petrochemistry of late Palaeozoic alkali lamprophyre dykes from N Scotland |
|---|
| Journal | Transactions of the Royal Society of Edinburgh: Earth Sciences |
|---|
| Authors | Baxter, A. N. | Author |
|---|
| Year | 1987 | Volume | 77 |
|---|
| Issue | 4 |
|---|
| Publisher | Cambridge University Press (CUP) |
|---|
| DOI | doi:10.1017/s0263593300023166Search in ResearchGate |
|---|
| Generate Citation Formats |
|---|
| Mindat Ref. ID | 493994 | Long-form Identifier | mindat:1:5:493994:2 |
|---|
|
| GUID | 0 |
|---|
| Full Reference | Baxter, A. N. (1987) Petrochemistry of late Palaeozoic alkali lamprophyre dykes from N Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, 77 (4) 267-277 doi:10.1017/s0263593300023166 |
|---|
| Plain Text | Baxter, A. N. (1987) Petrochemistry of late Palaeozoic alkali lamprophyre dykes from N Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, 77 (4) 267-277 doi:10.1017/s0263593300023166 |
|---|
| In | (1987) Transactions of the Royal Society of Edinburgh: Earth Sciences Vol. 77 (4) Cambridge University Press (CUP) |
|---|
| Abstract/Notes | ABSTRACTThe lower Carboniferous–late Permian dyke swarms of the Scottish Highlands and Islands comprise a mild-strongly alkaline basic series of dolerites, camptonites and monchiquites. Differentiation within the suite was largely controlled by olivine + clinopyroxene fractionation. Major and trace element data indicate that dolerites and camptonites chemically overlap, their mineralogical contrasts resulting from differential loss of an H2O, CO2-rich fluid phase during ascent. By contrast most monchiquites have high Mg-values and are relatively primitive compositions, some being near-primary magmas which have risen rapidly from mantle levels with little chemical modification.HREE-buffered incompatible element profiles imply a garnet–lherzolite source, which must underlie the lithospheric mantle region represented by spinel lherzolite xenoliths found in some monchiquites. C. 0·5–2·0% partial melting can account for the gross incompatible element variation in the suite, but relative fluctuations in K, Ba, Rb, Sr, P and Zr imply chemical heterogeneity controlled either by refractory mantle accessory phases or by modification of magmas during ascent through variably metasomatised lithospheric mantle. |
|---|
These are possibly similar items as determined by title/reference text matching only.
