Two geoscientific disciplines (mineralogy, geomorphology) which are placed far apart from
each other are selected to forge a genetic tie line between carbonatite-and agpaitic …

Proximal brecciform ferruginous and manganiferous rocks related to VMS deposits of the
Urals are subdivided into jasperites, gossanites, and umbers, in addition to thin-bedded …

Abstract Analyses of 122 Jurassic-Cretaceous rock samples from the Franciscan Terrane,
California, and 24 Cretaceous samples from the Shimanto Terrane, southwest Japan, show …

Trace element analyses have been carried out on hydrothermally altered pillow basalts of
greenschist facies dredged from the median valley of the Mid-Atlantic Ridge. Sr is leached …

Hydrothermally altered pillow basalts dredged from the Mid-Atlantic Ridge, and belonging to
the greenschist facies, have been studied in order to determine the mineralogical and …

There are several hundred ophiolitic manganiferous chert deposits, primarily of late Jurassic
to early Cretaceous age, known within the Franciscan assemblage of California. The …

This book is an outgrowth of my interest in the chemistry of sedimentary rocks. In teaching
geochemistry, I realized that the best examples for many chemical processes are drawn from …

Massive ore-grade zinc, copper and iron sulphide deposits have been found at the axis of
the East Pacific Rise. Although their presence on the deep ocean-floor had been predicted …

Almost all economic manganese ores are ultimately or directly derived from hydrothermal
vents associated with intermediate volcanic rocks. This source is in contrast to deep-sea …

Abstract Numerous Early Cretaceous Mn oxide and Mn-Fe deposits are distributed in the
Tokoro belt, northeastern Hokkaido, Japan. The Mn oxide deposits usually occur in the …