| It has also been found in silica-poor igneous rocks, such as syenite, nepheline syenite, serpentinite, and lamprophyre. |
| It is supposed that they did not crystallize in the lamprophyre dike but in some way were caught up by it. |
| Each variety of lamprophyre may and often does contain all four minerals but is named according to the two which preponderate. |
| Melts of these metasomites were volatile rich and hence ascended rapidly through the lithosphere, forming the lamprophyre magmas. |
| Remelting of these metasomites produced the Gardar lamprophyre magmas. |
| Reflection events were identified which could be attributed to known fracture zones and lamprophyre dykes. |
