Abstract The St. Ignace Island complex in Northern Ontario is a package of dominantly felsic rocks emplaced within the upper portions Osler Volcanic ~1.1 Ga Midcontinent Rift System. volcanic are predominantly tholeiitic basalts intercalated with rare interflow sediments and rhyolites. an ~26-km2 stock core quartz–feldspar–phyric rhyolites dacites outer ring anorthosite gabbro. Textures at vari...

A method for analyzing low-salinity fluids (up to ~11 wt% NaCl equivalent) that have been equilibrated with felsic melts in high-pressure, high-temperature experiments is reported. Experiments were performed at a pressure of 200 MPa and 800 °C internally-heated vessels, wherein magmatic quenched recovered multi-step process analyses major (Na, K, Ca, Cl, F) trace (Li, Be, Mn, Cu, Zn, Rb, Sr) el...

Abstract Rutile from a wide range of orogenic gold deposits and districts, including representative world-class deposits, was investigated for its texture trace element composition using scanning electron microscopy, probe microanalysis, laser ablation-inductively coupled plasma-mass spectrometry. Deposits are hosted in various country rocks felsic to ultramafic igneous sedimentary rocks, which...

Copper and associated gold mineralization in the Mundiyawas-Khera area of western India is hosted by Proterozoic felsic volcanic rocks rhyo-dacite composition. Signatures hydrothermal alteration represented sericite, epidote, scapolite carbonates are well observed around ore zone. The with gently to flat sloping REE pattern, variable negative Eu anomaly, intermediate abundances HFSE moderate lo...

As we know, vascular plants (Tracheophyta) in general and crop require a defined amount of trace elements to ensure normal growth development. In many developed countries, some natural materials have been used as an addition for growing ornamental plants, vegetables, hydroculture plants. Vietnam, minerals support plant is still very limited. Meanwhile, the source raw territory Vietnam quite pop...

One of the fundamental geophysical observations made of the Earth is the stratified nature of the continental crust, in which the lower crust comprises denser, more mafic material and the upper crust comprises less dense, more felsic material. This chemically differentiated layered structure is developed and maintained by partial melting at depth and the ascent of magma to shallower crustal lev...

U-Pb and Hf isotope analyses of zircons from felsic granulite xenoliths in Mesozoic volcanics reveal Early Archean ($3.6 Ga) lower crust beneath the younger (,2.85 Ga) southern margin of the North China craton, and suggest that the eastern part of the craton formed a coherent block by 3.6 Ga. Hf model ages indicate extraction of protoliths from the mantle ca. 4 Ga or earlier, followed by remelt...

The effect of watershed spatial scale on chemical weathering is inadequately known for subtropical environments. In order to determine the relationship between watershed scale and weathering chemistry, the Enoree River basin was sampled at seven different spatial scales ranging from second-order watersheds smaller than 2 km^2 to a sixth order watershed of 1840 km^2. The second-order watersheds ...

The Haisyn complex rocks (sobites (Shcherbakov, 2005)), consisting of diorite-like and amphibolites, which biotite granites develop, is outcroping near the village Shumyliv along South Bug river in an abandoned open pit mine (on Shumyliv). are characterized by high magnetization according to magnetic survey results. A linear anomaly extends north-east direction (NE 69º) with a distance more tha...

Abstract Granitoids are the main constituents of continental crust, and an understanding their petrogenesis is key to origin evolution continents. Whether crystal fractionation dominant way generate evolved magmas has long been debated, mostly because such processes would produce large volumes complementary cumulates, which remains elusive. Mafic magmatic enclaves (MMEs) ubiquitous in granitoid...