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Quartz-porphyry, in layman's terms, is a type of volcanic (igneous) rock containing large porphyritic crystals of quartz. These rocks are classified as...

Porphyry (/ˈpɔːrfəri/ POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained...

refer to quartz monzonite. The term is now deprecated. Quartz monzonite porphyry is often associated with copper mineralization in the porphyry copper ore...

Porphyry copper deposits are copper ore bodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers...

rock types are distinguished in the Kiruna porphyry such as trachyandesite lava and quartz-bearing porphyry of rhyolitic composition. These two rocks are...

materials, particularly quartz, sodium and potassium feldspar, and may be termed a quartz felsite or quartz porphyry if the quartz phenocrysts are present...

precipitated the iron on to a syenite porphyry footwall. Then the ore bed was covered by further volcanic deposits, quartz porphyry, and sedimentary rocks. Later...

deposits of the Lower Permian to the Upper Anis, namely the Bolzano Quartz Porphyry (~272 Ma), the Val Gardena Sandstone, which is famous for its fossil...

embedded in a very fine grained red-brown matrix. The composition of rhomb porphyry places it in the trachyte - latite classification of the QAPF diagram....

free quartz, form a group generally designated the "felsic" rocks. Those again that contain the least silica and most magnesia and iron, so that quartz is...

Elvan is a name used in Cornwall and Devon for the native varieties of quartz-porphyry. They are dispersed irregularly in the Devonian series of rocks and...

arenite the unit hosts some conglomerates with clasts of phyllite and quartz porphyry. The clasts are derived from the nearby units of Hopukka Formation...

metamorphosed mafic volcanic rock and a metamorphic facies Elvan, a quartz-porphyry found in Cornwall, UK Greenstone, Ontario, a municipality in Canada...

Rotliegend, for example the Schramberg or the Baden-Baden Basin with thick quartz-porphyry and tuff plates (exposed, for example, on the rock massif of Battert...

Germany (Weiselberg), Greece (Nisyros and Thera), Italy (in Bozen quartz porphyry, and Sardinia), Austria (Styrian Volcano Arc), Scotland (Argyll), Slovakia...

which forms the Karlsruher Grat, consists of quartz porphyry, specifically the Grünberg-quartz porphyry of the Geisberg Formation, which was formed around...

characteristic quartz and feldspar crystals, or porphyries found in the volcanic rocks. The entire 107-hectare (264-acre) island constitutes the Porphyry Island...

of purple conglomerate, felsitic porphyry, quartz porphyry, tuffite and andesite intercalated with rhyolitic porphyry. This formation is dated to the Early...

eaten raw is deliberately grilled on a special type of rock called quartz porphyry. Originally, this hearty fisherman's dish was eaten by fishermen warming...

pyrite-chalcopyrite ore body, green is a gabbro diabase, lamprophyre and quartz porphyry dike, and light tan is the Supraore sequence of the Upper Sakukan subformation...