S08: Advances in the geochemical and isotopic analyses of fluid inclusions in ore mineralizing systems

Convener:	Jochen Kolb	(kolb@rwth-aachen.de)
Keynote:	John Mavrogenes	(ANU, Canberra)

This symposium focuses not only on analytical methods but also on applications of flinc analyses. Papers are invited that cover fluid inclusion research related to hydrothermal systems and ore deposits, magmatic and metamorphic fluids, as well as sedimentary and petroleum systems. Also welcome are contributions focusing on analytical techniques and thermodynamic modelling. The symposium will serve as an international forum to present and discuss new developments and applications of research in this field.

S09: Developments and applications of classical (H, C, O, S) and new (Fe, Cu, Mo, Se) stable isotope analyses to ore deposit research

Convener:	T. Vennemann	(Torsten.Vennemann@unil.ch)
Keynote:	Alan Matthews	(Jerusalem)

Over the past few decades stable isotope geochemistry has proven itself as an indispensable tool for interpretations on the origin, exploration and also exploitation of a wide range of different ore deposits. The focus of such research has, so far, largely been placed on applications of the more traditional stable isotope systems such as those of H, C, O, and S, or a combination thereof. More recently, however, developments in analytical capabilities have opened up the possibility of using a wide range of ìnew" or non-conventional stable isotope systems such as those for Fe, Cu, Mo, Se, and Si, for example, on a routine basis. This session aims at integrating the use both traditional and non-conventional stable isotope systems for ore deposit research. Particular focus is placed on a combination of various methods in order to address the possible advantages of the new systems to research on ore deposits. Abstracts on field-based research as well as experimental research in this direction are welcomed.

S10: The role of phase separation in magmatic-hydrothermal systems

Conveners:	V. Lüders	(volue@gfz-potsdam.de)
	R. Bodnar	(rjb@vt.edu)
Keynote:	Wolfgang Bach	(Bremen, Germany)

Fluid phase separation in magmatic-hydrothermal environments is often the primary cause of major variations in fluid composition in many land-based and marine hydrothermal systems. Immiscibility (boiling) commonly leads to extreme fractionation of stable isotopes and distribution of metals between silicate melts and aqueous phases, and between the liquid and vapor phases. Furthermore, boiling is a favorable process for the precipitation of oxides, sulfides and native metals in ore deposits. This session aims to bring together researchers studying immiscibility and boiling in the magmatic-hydrothermal environment, and will include experimental and theoretical studies as well as studies of both active, modern systems and ancient, fossil systems, ranging from the macro to the micro scale.

S11: Supergene metal accumulation and paleoclimate

Convener:	F. M. Meyer	(m.meyer@rwth-aachen.de)
Keynote:	G. Brimhall	(Berkeley)
	Paulo Vasconcelos	(Brisbane, Australia)

Supergene ore-forming processes are intimately associated with pedogenesis, reflecting local climate and the interactions between rock, hydrosphere, and atmosphere. Many different metals are enriched in the surficial environment, the most important of which include Al, Ni, Mn, Fe, Cu, Au, Pt, and U. The symposium covers topics such as laterite formation through geologic time, snowball earth and ore deposits, and non-sulfide zinc deposits, as well as clay deposits, calcretes, and associated uranium mineralization. Also welcomed are contributions that include studies on the effects of modification and alteration of hypogene ore deposits by supergene processes, that change their original character to their present day style of occurrence and the implications those effects have on exploration and ore extraction.

S12: The geochemistry of ore deposits

Convener:	Sarah-Jane Barnes	(sjbarnes@uqac.ca)
	Jake Hanley	(jake.hanley@gmail.com)
	S-Y Jiang	(syjl210@hotmail.com)
Keynote:	Zoltan Zajacz	(ETH Zuerich, Switzerland)

Geochemical principles play a key role in the understanding of how ore deposits form and in the practical exploration for ore deposits. The geochemistry of sulfide and oxide ore minerals is central to many aspects of ore deposit studies, mineral technology, and the environmental impact of resource exploitation. This symposium will explore recent advances in both fundamental and applied studies across a wide range of areas such as geochemical processes involved in ore formation, application of geochemical methods to exploration for ore deposits, as well as ore dressing and waste management.

S13: Applied geochemistry - from brines and rare-earth elements to diamonds: A tribute symposium to A. A. Levinson sponsored by IAGC

Conveners:	Brian Hitchon	(geosci@telusplanet.net)
	Bruce Kjarsgaard	(Bruce.Kjarsgaard@nrcan-rncan.gc.ca)
Keynote:	Russell Harmon	(IAGC)

Professor Alfred A. Levinson is recognized forfundamental and applied research in two fields - exploration geochemistry and gem mineralogy - which form the basis of this symposium. Al worked for many years in exploration geochemistry, first in private industry and later in academia. During this time, he proposed a system of mineral nomenclature for rare-earth elements that was accepted by the International Mineralogical Association. In 2002, the mineral species levinsonite-(Y), ahydrated REE alumino-sulfate formed during supergene weathering of pyritiferous phyllite was named in his honor. From 1967 to 1970, Prof. Levinson served as executive editor of Geochimica et Cosmochimica Acta and also edited the 1970 Proceedings of the Apollo 11 Lunar Science Conference and the 1971 Proceedings of the Second Lunar Science Conference. During the 1970s and 1980s, he published two textbooks on exploration geochemistry. Late in his career, Prof. Levinson directed his research toward diamonds and gemstones, becoming an acknowledged expert on the occurrence, exploration, recovery, and economics of diamonds.
This symposium will comprise two sections: Section I:'Exploration Geochemistry'. This session will consist of presentations in the broad area of exploration geochemistry, including both theoretical and field studies. Section II: 'Gem Mineralogy, Diamonds and Gemstones'. This session will be directed toward diamonds and gemstones; their origin, mineralogy, and geochemistry. It is hoped that former students and colleagues will contribute to this symposium in recognition of Prof. Levinson's achievements in geochemistry and mineralogy over a most productive professional career. Papers given at the symposium will be published in a special issue of the IAGC journal Applied Geochemistry (guest editor, Brian Hitchon).