Hydrothermally altered volcanic and/or intrusive rocks
of intermediate to silicic composition are present in the deposits and prospects discussed, as well as at a number of additional prospects.
Most of the NW-SE fractures are filled with barite and less commonly, lead-zinc ores, and their predominance in the intrusive rocks
suggests that they are probably Post-Santonian in age.
The aim of this study is to present new Sr and Nd isotopic data from some intrusive rocks
of Laramide Arc to discuss their geochemistry, age, different magmas relationship, and the role and type of basement involved.
In addition, there are two undeformed, unmetamorphosed, intrusive rocks
with U-Pb LA-ICPMS zircon ages of 48.1 +-0.8 Ma and 45.8 +-0.8 Ma.
The lithology of intrusive rocks
consists of gabbro, diorite, quartz diorite, granodiorite, biotite granite and leucogranite.
According to the current New Brunswick lexicon of bedrock geology (New Brunswick Department of Natural Resources 2010), the Saint George Plutonic Suite is a contiguous cluster of mainly high-level intrusive rocks
comprising (in inferred chronological order from oldest to youngest) the Bocabec Gabbro, Utopia Granite, Welsford,Jake Lee Mountain, and Parks Brook alkali granites, Magaguadavic Granite, John Lee Brook Granite, and Mount Douglas Granite.
He studied ferromagnesian minerals in the basic igneous intrusive rocks
in the Wichita Mountains of Oklahoma.
Vermiculite mineralization in the Agasthyapura area occurs within the ultramafic body which trends in N35[degrees]E direction and at the contact zones between the N65[degrees]E trending and dipping subvertical acid (felsic) intrusive rocks
. The vermiculite accumulations occur as clots within the ultramafic body and also as narrow belts, found in the marginal portions of fractured and altered ultramafic rocks in contact with acid intrusive (Fig.
of the Coldwell Complex revealed high grade mineral zones of copper, gold, palladium and platinum and other metals.
and Desborough, G.A., 1970, Mafic intrusive rocks
of Precambrian age in southeast Missouri, Missouri Division of Geology and Land Survey, Report of Investigations 47.
These holes demonstrate the continuity of the mineralization along the McQuesten Structural Zone and significantly advance the project towards the resource definition stage." Drilling and trenching completed to date on the MeQuesten property indicate the presence of a large mineralized system hosted within calcareous meta-sediments and intrusive rocks
along the McQuesten Mineralized Structural Zone.