Comparative volcanology and petrology of the atlantic island-arcs

  title={Comparative volcanology and petrology of the atlantic island-arcs},
  author={Peter E. Baker},
  journal={Bulletin Volcanologique},
  • P. E. Baker
  • Published 1 February 1968
  • Geology
  • Bulletin Volcanologique
Comparisons are made between the Lesser Antilles and the South Sandwich Islands, the recent volcanic island chains at the eastern margins of the Caribbean and Scotia arcs. Although situated in similar geological and structural environments there are differences in the type of volcanic activity which prevails in these two arcs and in the petrography and chemistry of the lavas emitted. There is good evidence that the South Sandwich Islands are in general appreciably younger than the islands of… 
Magmatism in the South Sandwich arc
Abstract The South Sandwich Islands are one of the world’s classic examples of an intraoceanic arc. Formed on recently generated back-arc crust, they represent the earliest stages of formation of arc
Geology, petrography, and geochemistry of the volcanic islands of Tonga
The South Pacific Ocean is an ideal area in which to test some of the compositional implications of plate tectonics and sea-floor spreading. The island arc of Tonga marks an active zone of seismic
The Scotia Arc and Antarctic Margin
The Scotia Arc is the name generally applied to the largely submarine physiographic feature that joins southern South America to the Antarctic Peninsula. More correctly called the Scotia Ridge, it
Evolution of the Margins of the Scotia Sea
The margins of the South American and Antarctic continents that border on the Scotia Sea have been affected during the Mesozoic and Cenozoic by tectonic processes related to both divergent and
Petrology and chemistry of recent lavas in the northern Marianas: Implications for the origin of island arc basalts
Petrologic and chemical data are presented for samples from five volcanically active islands in the northern Marianas group, an intra-oceanic island arc. The data include microprobe analyses of
Contrasts in tectonic evolution of orogenic belts in the south-east pacific
Abstract The orogens of southern South America and Antarctic Peninsula, which are of similar age and apparently linked by the Scotia Arc, are shown to have evolved along markedly different patterns


Lateral variation of basalt magma type across continental margins and Island Arcs
Quaternary basalt magmas in the Circum-Pacific belt and island arcs and also in Indonesia change continuously from less alkalic and more siliceous type (tholeiite) on the oceanic side to more alkalic
The volcanic history and petrology of the Soufrière region, St. Lucia
The Soufriere region, which includes the most recently active volcanic centre on the island of St. Lucia in the West Indies, is the site of a relatively recent volcanic caldera. This structure, with
Observations in the South Sandwich Islands, 1962
The South Sandwich Islands lie between lats. 56° 18′ S. and 59° 28′ S., and between longs. 26° 14′ W., and 28° 11′ W. There are eleven islands, of which ten form a curved chain stretching north and
A Survey of the South Sandwich Islands
T HE eleven volcanic islands of the South Sandwich group lio on an arc between latitudes 56 IS' and ii9° 2S' S. and longitudes 26° 14' and 2S0 ll' W. (Fig. 1). Although discovered by Cook in 1775 and
The islands of Saint Bartholomew and Saint Martin consist of andesitic tuffs and tuff-breccias of Middle and Late Eocene (?) age, respectively, which have been intruded by hypabyssal basalt,
Chemical Characteristics of Oceanic Basalts and the Upper Mantle
Tholeiitic basalts (oceanic tholeiites) that form most of the deeply submerged volcanic features in the oceans are characterized by extremely low amounts of Ba, K, P, Pb, Sr, Th, U, and Zr as well as
Pumice Eruption in the Area of the South Sandwich Islands
Abstract An extensive pumice raft was encountered by H.M.S. Protector in the area of the South Sandwich Islands on the 14th March, 1962. Evidence is presented which suggests that this material was
The Structure of the Scotia Arc
  • D. Hawkes
  • Geology, Environmental Science
    Geological Magazine
  • 1962
Abstract It is suggested that the Scotia Arc was formed after the disruption of a continental strip between South America and Antarctica by an eastward advance of the Pacific crust; volcanic island