The distribution of the chalcophile and siderophile metals Cu, Ni, Au, Pd, Ir, Os and Ru in an
Archaean komatiite flow from Alexo, Ontario and in a Phanerozoic komatiitic suite of
Gorgona Island, Colombia, provides new information about the geochemical behaviour of …

An exceptional occurrence of ultramafic lavas within the volcanic member of the Mesozoic
(or younger) Gorgona Igneous Complex represents the first known komatiites of post-
Precambrian age. Gorgona komatiites are virtually unaltered and display typical spinifex …

The small Pacific island of Gorgona, off the coast of Colombia, is well known for its
spectacular spinifex-textured komatiites. These high-Mg liquids, which have been linked to a
late Cretaceous deep mantle plume, are part of a volcanic series with a wide range of trace …

Abstract Komatiitic rocks from Gorgona Island, Colombia, in contrast to their Archaean
counterparts, occur as rather structureless flows. In addition, textural and mineralogical
features indicate that the Gorgona komatiites may have crystallized from superheated …

UNMETAMORPHOSED mafic and ultramafic rocks overlain by Neogene oceanic sediments
are exposed on Gorgona Island which is a remnant of the Coastal Cordillera along the
Pacific margin of Colombia 1. Gorgona is one of the rare places in the world where young …

Abstract Gorgona Island, Colombia is remarkable not only because it contains the only
Phanerozoic komatiites, but also because it has mafic to ultramafic lavas with a wide range
of compositions, from moderately enriched to extremely depleted (relative to Bulk Earth). The …

The presence of coupled enrichments in 186 Os/188 Os and 187 Os/188 Os in some mantle-
derived materials reflects long-term elevation of Pt/Os and Re/Os relative to the primitive
upper mantle. New Os data for the 89 Ma Gorgona Island, Colombia komatiites indicate that …

Knowledge of upper thermal-tolerance limits of marine organisms in the tropical eastern
Pacific (TEP) is important because of the influence of phenomena such as El Niño and
global warming, which increase sea temperature. Laboratory experiments were conducted …

A wide range of intrusive (wehrlite, dunite, gabbro and olivine gabbro) and extrusive
(komatiites picrites and basalts) igneous rocks are found on the small pacific island of
Gorgona. The island is best known for its∼ 90 Ma spinifex-textured komatiites: the only true …

Recent work has suggested that the mafic-ultramafic volcanism in evidence throughout
portions of the Caribbean, Central America, and northern South America, including the
islands of Gorgona and Curaçao, was generated as part of a middle-Cretaceous, large …