Mike Porter

• BSc (Hons)
• Chief Geologist at Porter GeoConsultancy Pty Ltd

The Jinchuan Ni-Cu-PGE deposit (>500 Mt @ 1.2% Ni, 0.7% Cu, ∼0.4 g/t PGE), one of the largest magmatic sulphide deposits in the world, is located within the westernmost terrane of the North China Craton. It is hosted within the 6.5 km long, Neoproterozoic (∼0.83 Ga) Jinchuan ultramafic intrusion, emplaced as a sill-like body into a Palaeoproterozoi...

The Oyu Tolgoi cluster of seven porphyry Cu-Au-Mo deposits in southern Mongolia, define a narrow, linear, 12 km long, almost continuously mineralised trend, which contains in excess of 42 Mt of Cu and 1850 t of Au, and is among the largest high grade porphyry Cu-Au deposits in the world. These deposits lie within the Gurvansayhan island-arc terrane...

This two part paper discusses the classification, definition and characteristics of what may be termed “iron oxide-alkali altered” mineralised systems - a grouping that collectively incorporates both iron oxide coppergold (IOCG) sensu stricto ores, and otherwise similar deposits that also have abundant related hydrothermal iron oxides and associate...

This second of the two parts of this paper reviews aspects of the lithospheric- to deposit-scale setting, tectonic and structural controls, associated magmatism, temporal distribution, implied crustal scale sources and circulation dynamics of ore-related fl uids, and the resultant alteration and mineralisation patterns, for most of the world’s prov...

Major porphyry Cu-Au and Cu-Mo deposits (e.g. Oyu Tolgoi in Mongolia - >2.3 Gt @ 1.16% Cu, 0.35 g/t Au and Kal’makyr-Dalnee in Uzbekistan - >5 Gt @ 0.5% Cu, 0.4 g/t Au) are distributed over an intervalof almost 5000 km across central Eurasia, from the Urals Mountains in Russia in the west, to Inner Mongolia in north-eastern China, to the east. Thes...

Abstract - Hydrothermal copper & gold deposits associated with felsic intrusives, particularly porphyry related and epithermal ores, are found in a series of extensive, narrow, linear metallogenic provinces throughout the world. These are predominantly associated with the great Mesozoic to Cainozoic orogenic belts. Major deposits however, are also...