The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The mid-Tertiary lamprophyre dike swarm (~8km×2.5km in size) from Hermosillo (Sonora, NW Mexico) has calc–alkaline characteristics and includes NNW-striking, amphibole-phyric spessartite (~85% of the swarm) and NNE-striking, phlogopite-phyric kersantite. The 40 Ar/ 39 Ar geochronology of amphibole and phlogopite gives overlapping plateau ages ranging from 25 to 21Ma. Although all the...
The Lighthouse gneiss association is an amphibolite-dominated assemblage situated in the allochthonous Shawanaga domain of the Central Gneiss Belt (CGB), Grenville Province. It consists of two units in which the amphibolites differ in chemical composition and associated lithologies. The upper unit consists of: (i) thick intervals of amphibolite interpreted as mafic flows and which form about half...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.