lamprophyre การใช้

• A hornblende lamprophyre dyke in the Rozel Conglomerate is dated at.
• Lamprophyre dykes of Late Permian age are found throughout Orkney.
• Musselroe Bay nearby has a lamprophyre and basalt from.
• Dolerite ( or diabase ) and lamprophyre dykes intruded.
• On King Island, there was an intrusion of a biotite lamprophyre dyke at.
• Cape Portland is host to andesite, lamprophyre and porphyrite intrusions and eruptions from.
• The lamprophyre is an unusual igneous rock that contains a low content of silica.
• There are two sets of lamprophyre dykes.
• Modern nomenclature has been derived from an attempt to constrain some genetic parameters of lamprophyre genesis.
• The dykes included a swarm of dolerite dykes, also lamprophyre, feldspar porphyry and aplite.
• Lamprophyre dykes and sheets have intruded at Hibbs Bay and nearby on the south west coast.
• Hornblende lamprophyre ( spessarites ) contain plagioclase, coloured light brown and are oriented north-south.
• The sapphire bearing Yogo dike is a dark gray to green intrusive rock known as a lamprophyre.
• The dikes or sills consist either of phonolite, tinguaite, lamprophyre micromalignite, lamprophyre micromelteigite, or carbonatite.
• The dikes or sills consist either of phonolite, tinguaite, lamprophyre micromalignite, lamprophyre micromelteigite, or carbonatite.
• Ultrapotassic lamprophyre dikes can also be found along the basin flanks, which are highly unusual in the Rocky Mountain region.
• Radiometric dates of 1883-1870 Ma are reported for mafic, ultramafic, carbonatite and lamprophyre intrusions within the Trough.
• Volcanic rocks which have been observed include absarokite, andesite, basaltic andesite, hornblende-lamprophyre, minette and spessartite.
• Ultrapotassic, ultramafic igneous rocks such as lamprophyre, lamproite and kimberlite are known to have reached the surface of the Earth.
• Lamprophyre erratics that originated from the bed of the North Sea demonstrate the influence of ice action on the geomorphology of the islands.