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The present volume Stratabound Ore Deposits in the Andes has its
roots in an international seminar on stratabound ore deposits which
took place in September 1986 in Cusco, Peru, sponsored by Multi
ciencias (Peru) and UNESCO. During this seminar it became clear
that the amount and quality of research done on stratabound ore
deposits in the Andes required a synthesis. Researchers in industry
and government as well as in academia, including many which had
participated at the Cusco Seminar, were invited to contribute. The
answer was extremely positive, confirming the idea that a book
expressing the state of the art of the study of stratabound ore
deposits in the Andes was long overdue. As editors we sought to
give maximum coverage to the present knowledge, yet keeping the
length, and thereby the price, within rea sonable limits. The book
contains three types of contributions. In the first part the reader
will find review papers focusing on ( 1) the geologic framework
(Frutos), (2) the metallogenesis in Andean countries including also
types of deposits differing from those of stratabound nature
(Cardozo and Cedillo, Oyarzun), and (3) an in troductory overview
of the stratabound ore deposits in the Andes, emphasizing their
geotectonic position as a classification tool (Font bote).
Sediment-hosted deposits are the main source of zinc and lead. In
this volume, the reader will find the most recent developments in
research including: - Fluid migration leading to formation of Zn-Pb
ores in sedimentary basins. Relationships to orogenic events and to
geothermic anomalies - Transport of metals and precipitation
mechanisms. The role played by fluid mixing, fluid-rock reaction,
organic matter, and thiosulfates - Paleomagnetic dating of ore
deposits - The association of Mississippi Valley-type ore deposits
to diapiric salt structures - Geochemical investigations applied to
exploration for sediment-hosted Zn-Pb deposits - Economic aspects.
The broad geographical coverage is an additional aspect which will
interest both researchers and explorationists.
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