SELECT IOCG VOLUME ABSTRACTS   BUY  
Iron Oxide Copper-gold and Related Mineralisation of the Siberian Craton, Russia
2 - Palaeoproterozoic and Mesozoic Assemblages of Iron Oxide, Cu, Au and U Deposits of the Aldan Shield, South-eastern Siberia
by
Serguei G. Soloviev,   International GeoSol Consulting Inc., Calgary, Alberta, Canada   and   Centre for Russian and Central EurAsian Mineral Studies (CERCAMS), Natural History Museum, London, UK.

in - Porter, T.M. (ed.), 2010 - Hydrothermal Iron Oxide Copper-Gold & Related Deposits: A Global Perspective, v. 4,  Advances
      in the Understanding of IOCG Deposits; PGC Publishing, Adelaide.  
pp. 515-534.

< Previous Abstract | Monograph Index Page | Next Abstract >

ABSTRACT

The Aldan Shield, part of the Siberian Craton, incorporates numerous iron oxide, copper, gold and uranium deposits formed during the Palaeoproterozoic and Mesozoic. These deposits are clustered within mineralised districts, and along major crustal lineaments across the shield, and include those with combinations of two or more of these metals. The period from 2.0 to 1.8 Ga during the Palaeoproterozoic, was especially productive for IOCG related apatite-iron oxide-REE, iron oxide [±apatite±copper] and copper-iron oxide-gold deposits, while evidence for the presence of significant contemporaneous Au and U mineralisation is growing. These deposits are hosted by the Archaean-Palaeoproterozoic cratonic basement, with no direct relationship to the significant contemporaneous anorogenic Palaeoproterozoic A-type igneous suites of the region. In contrast, during the Mesozoic, particularly from 150 to 130 Ma, major uranium and gold, and low grade copper concentrations were formed, but apparently only minor Fe oxide and no significant IOCG related mineralisation. These younger deposits are mostly hosted in the Cambrian cratonic cover and/or along the cratonic basement/cover unconformity, and are closely associated with, or hosted by, small intrusives of potassic alkaline and alkalic (with shoshonitic affinities) to calc-alkaline rocks exhibiting similarities with those of both distal subduction-related and anorogenic igneous suites. The Palaeoproterozoic and Mesozoic deposits represent two temporally separated ore deposit assemblages involving copper, gold, iron oxides and uranium developed within similar, but not identical cratonic tectonic settings, and possibly with common metal sources in the lower crust. The older group included the development of IOCG mineralisation, the younger apparently did not, corresponding rather to alkalic porphyry/epithermal deposit style.

Buy Top   |   PGC Publishing     |   PGC Home


This book is NOW AVAILABLE FOR ORDER via the web by selecting the BUY button above.

This abstract was printed from the PGC Publishing website http://www.portergeo.com.au/publishing.


PGC Logo
Porter GeoConsultancy Pty Ltd
 International Study Tours
     Tour photo albums
 Ore deposit database
 Conferences
 Experience
PGC Publishing
 Our books  &  bookshop
     Iron oxide copper-gold series
     Super-porphyry series
     Porhyry & Hydrothermal Cu-Au
 Ore deposit literature
 
 Contact  
 What's new
 Site map
 FacebookLinkedin