introduction mesgar iron occurrence is located in northwestern part of the central iran, 115 km south of zanjan. although there is a sequence of volcanic-pyroclastic rocks accompanied by iron mineralization, no detailed works had been conducted in the area. the present paper provides an overview of the geological framework, the mineralization characteristics, and the results of geochemical stud...

Hydrogeomorphic controls on runoff in a temperate swamp S. C. Kaufman, J. M. Waddington, and B. A. Branfireun McMaster University, School of Geography and Geology, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada University of Toronto at Mississauga, Department of Geography, 3359 Mississauga Road North, Mississauga, Ontario L5L 1C6, Canada Received: 7 March 2005 – Accepted: 16 March 200...

East-northeast extension ca. 24 Ma at Rodeo and Nazas, México, was accompanied by eruption of hawaiites, marking some of the earliest intraplate-type mafic alkalic volcanism associated with development of the southern Basin and Range Province. An earlier extensional pulse, 32.3–30.6 Ma, concurrent with subductionrelated rhyolitic volcanism of the Sierra Madre Occidental, is the earliest establi...

introduction worldwide, ni-cu and pge magmatic sulfide deposits are confined to the lower parts of stratiform mafic and ultramafic complexes. however, ophiolite mafic and ultramafic complexes have been rarely explored for sulfide deposits despite the fact that they have been extensively explored and exploited for chromite. sulfide saturation during magmatic evolution is necessary for sulfide mi...