Systematic petrochemical differences in andesite suites

  title={Systematic petrochemical differences in andesite suites},
  author={Bernard M. Gunn},
  journal={Bulletin Volcanologique},
  • B. Gunn
  • Published 1 March 1974
  • Geology
  • Bulletin Volcanologique
When the chemical compositions of andesites are computed by a least mean squares technique at 60 % silica for different volcanoes and provinces, systematic differences appear. While island arcs in general have lower K, Rb, Ba, Th, Sr and higher Ca than the continental andesites, individual volcanoes within a province often show up to orders of magnitude differences in these elements. Of the seven main Quaternary volcanic provinces of the western American Cordillera (Alcutian, Cascade, Central… 
7 Citations
The petrology and geochemistry of the Medicine Lake Volcano, California
The Medicine Lake shield volcano is part of the Oregon high alumina plateau basalt petrologic province, as defined by Waters (1962) and Higgins (1973). The early eruptions are basaltic andesites and
Andesites and high-alumina basalts from the central-south Chile high Andes: Geochemical evidence bearing on their petrogenesis
High-alumina basalts from seven High-Andean stratovolcanoes (37 °30′S to 41 °S) have major and trace element (including rare earth elements, REE) that are consistent with derivation by partial
Petrographisch-lagerstättenkundliche Untersuchung der Kupferlagerstätte Sar Cheshmeh (Süd-Iran)
ZusammenfassungDie Cu-Lagerstätte Sar Cheshmeh liegt im Süd-Iran in einer Vulkanitzone, die in 150 km Abstand nördlich parallel zur Zagrosüberschiebung verläuft. Die Lagerstätte ist an einen
Metasomatic alteration of the predominantly island arc igneous suite of the Limestone Caribbees (E. Caribbean)
ZusammenfassungDie petrographische und geochemische Untersuchung von 79 Proben von den Kalkstein-Karibeninseln Atigua, St. Martin und Desirade zeigt eine unterschiedlich starke metasomatische


Geochemistry of the volcanics of central Mexico
The Tertiary and Recent volcanics of Mexico occur in two provinces. The Cordillera Province is made up of about 1700 m of ignimbrite sheets overlain and intercalated in the upper part by olivine
Petrochemistry of the Peléan-Type Volcanoes of Martinique
The northern part of the island of Martinique in the Lesser Antilles consists of three overlapping volcanic cones: Mont Pelee, Pitons du Carbet, and Morne Jacob. The southern half of the island
Sr87/Sr86 Ratios of Quaternary Lavas of the Cascade Range, Northern California
Quaternary lavas from Mount Lassen, Mount Shasta, and Medicine Lake, which range in composition from olivine basalt to rhyolite, have Sr 87 /Sr 86 values that fall between 0.7030 and 0.7043,
The volcanic geology and petrology of Montserrat, West Indies
  • W. Rea
  • Geology
    Journal of the Geological Society
  • 1974
The island of Montserrat is made of the products of five major and three parasitic volcanoes of Pliocene to Recent age. Apart from South Soufrière Hill where some basalt lava flows and pyroclast
Isotopic composition of strontium in three basalt-andesite centers along the Lesser Antilles arc
Si87/Sr86 ratios have been determined for lavas and py lastic rocks from three basalt-andesite centers along the Lesser Antilles arc—Mt. Misery on the island of St. Kitts, Soufriere on the island of
Quaternary lavas from the southern Cascades, western U.S.A.
A series of basaltic and andesitic lavas from three centers in the Cascades (Lassen, Medicine Lake, Mt. Shasta) have been investigated. The lavas are weakly porphyritic, containing phenocrysts of
Compositional variation in three Cascade stratovolcanoes: Jefferson, Rainier, and Shasta
Detailed major and trace element studies of volcanic rocks from Jefferson, Rainier, and Shasta stratovolcanoes in the Cascade Range indicate that each volcano has distinct geochemical distribution
Potassium-Rich Igneous Rocks from Puerto Rico
Both shoshonites and calc-alkaline andesites of Late Cretaceous age occur in south-central Puerto Rico. These rocks are chemically and mineralogically related in many respects, but the potassium-rich
Circum‐Pacific andesite types
If geophysical evidence and geochemical inference that andesites are erupted from the mantle as juvenile sial are valid, areal variations among andesitic suites may reflect variable conditions within