The composition of ore-forming fluids

The majority of the World’s ore deposits were formed from hydrothermal fluids moving through the Earth’s crust.  The temperature and composition of these fluids exert a strong control on the type of ore deposit being formed and as such, investigation of the composition of ore-forming fluids is crucial for complete understanding of ore genesis.  Fluid inclusions, bubbles of hydrothermal fluids trapped during precipitation of the host mineral give us direct access to ore forming fluids and the conditions of ore formation.  We use microthermometry, Raman microspectrometry and laser ablation inductively-coupled-plasma mass spectrometry (LA-ICP-MS) to characterize the composition and state of the ore forming fluids. Facilities at IGV, SU include a Linkam THM 600 stage mounted on a Nikon microscope utilizing a 40X long working-distance objective, and a multichannel Dilor XY Laser Raman spectrometer.

Contact information

Iain Pitcairn
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Curt Broman
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Current projects:
Ore fluid compositions in the Victoria goldfields: the control of compositional and temperature variability on mineralization style on a regional scale. (IP + CB)

The variability of fluid compositions within individual mineralised veins (IP + CB)

Gold metallogeny of the Central Eastern Desert of Egypt: Integrated field, remote sensing and genetic studies. (CB, collaborators: Prof Pär Weihed, Luleå University of Technology; Prof Basem Zoheir, Benha University, Faculty of Science, Egypt; Doc Kjell Billström, Swedish Museum of Natural History).

Zn-Pb breccia ores in the “Gold Line”, Storuman area: temporal and genetic relationships of a new type of deposits”. (CB, collaborators: Doc Kjell Billström, Swedish Museum of Natural History; Warren Pratt, SpecGeolMap Ltd, UK; Lappland Goldminers AB.

New Styles of Intrusive Related Copper-Gold Deposits in northern Sweden – the Älgträsk intrusive hosted Au-Cu deposit”. (CB, collaborators Prof Pär Weihed and PhD Therese Bejgarn, Luleå University of Technology).

Polymetallic mineralization associated with anorogenic magmatism in southern Finland. (CB, collaborators: Prof Krister Sundblad and PhD Mira Valkama, Department of Geology, Turku University, Finland)

Fluid inclusion study of the shear zone hosted gold deposit at Svartliden, northern Sweden. (CB, collaborator: Dragon Mining).

Zn-Pb ores of the Caledonian front. (CB, collaborators: Boliden Mineral AB; Doc Kjell Billström, Swedish Museum of Natural History).

Department of Geological Sciences
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