Savo Type Granitic Rocks

From winter 2001 an introduction to igneous and metamorphic petrology.

Savo type granitic rocks. The iron number is the ratio of the feo feo mgo and its variation with the silica content. They are recognized by a specific set of mineralogical geochemical textural and isotopic characteristics that indicate for example magma hybridization in the deep crust i type granites are saturated in silica but undersaturated in aluminum. Granitic or rhyolitic magmas and andesitic magmas are generated at convergent plate boundaries where the oceanic lithosphere the outer layer of earth composed of the crust and upper mantle is subducted so that its edge is positioned below the edge of the continental plate or. To investigate the feasibility of different types of jalore granitoid rocks red pink golden and white granites in this application.

In the central finland granite complex area as well as in the karelian domain there are granitic rocks as well as dykes of black stone. 347 in your textbook. Those of you with granitic pet rocks may find it useful to plot some of these analyses with your own data. I type granites are a category of granites originating from igneous sources first proposed by chappell and white 1974.

There are also other classification schemes non alphabetic which could he used to geochemically classify granitic rocks. These analyses of granitic rocks are on p. Granite is a type of igneous rock that consists of quartz gray plagioclase feldspar white and alkali feldspar beige plus dark minerals such as biotite and hornblende. The c type was defined as charnockitic granitoids by kilpatrick ellis 1992 who argued that a distinct charnockitic magma type is recognizable among both plutonic and volcanic rocks.

Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. The savo belt consists mainly of metamorphic rocks with ore potential being not very promising as natural stone reserves. Crystalline rocks are the best suited rock type for the nuclear waste repository. Wide range of granitic composition types into 6 rock types.

Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. The interpretation of s type granites are that they are sourced from the partial melting of sedimentary rocks supracrustal that have been through one or more cycles of weathering. The geological map of the project area in finland is presented in the figures 1 and 2. Petrographic features are.

S type granites are so named as a shorthand for supracrustal type. Granite is used by the public as a catchall name for any light colored coarse grained igneous rock. A deeper understanding of the thermomechanical stability of rocks plays a crucial role in the selection of suitable host rock for this purpose. It forms from the slow crystallization of magma below earth s surface.

They include the fe number or fe.