Calc-alkaline magma series - Wikipedia
The diverse rock types in the calc-alkaline series include volcanic types such as basalt, andesite, dacite, rhyolite, and also their coarser-grained intrusive equivalents (gabbro, diorite, granodiorite, and granite). They do not include silica-undersaturated, alkalic, or peralkaline rocks.
Calc-alkaline rocks - SpringerLink
Calc-alkaline rocks are a broad group of volcanic and plutonic rocks found in modern island arcs, cordilleran continental margins, and ancient orogenic belts. The group includes a range of compositions and mineralogies ranging from mafic basalts, through intermediate andesites to the felsic and silicic dacites and rhyolites.
Volcanic Rocks - ALEX STREKEISEN
Rocks in the tholeiitic magma series are classified as and are distinguished from rocks in the calc-alkaline magma series by the redox state of the magma they crystallized from (tholeiitic magmas are reduced; calc-alkaline magmas are oxidized).
A genetic classification of the tholeiitic and calc-alkaline …
2021年9月30日 · The division of igneous rocks into tholeiitic and calc-alkaline suites makes sense in a plate tectonic context. Tholeiitic rocks are found at mid-ocean ridges, where decompression melting of the upper mantle produces primitive magmas without crustal contamination.
Calc-alkaline - chemeurope.com
The diverse rock types in the calc-alkaline series include volcanic types such as basalt, andesite, dacite, rhyolite, and also their coarser-grained intrusive equivalents (gabbro, diorite, granodiorite, and granite).
Two of these widely used diagrams are the total alkalies-silica (TAS) diagram and the (Na2O + K2O)–FeO*– MgO (AFM) triangular diagram, neither of which has calcium as one of the plotting...
Alkaline magma series - Wikipedia
Rocks in the alkaline magma series are distinguished from rocks in the subalkaline tholeiitic and calc-alkaline magma series by their high content of alkali metal oxides (K 2 O plus Na 2 O) relative to silica (SiO 2).
Calc-alkali basalt: Mineral information, data and localities.
Calc-alkaline basalts are rich in Ca, Mg and Na, crystallising olivine, augite and plagioclase, and make up a major portion of continental crust. It is commonly associated with andesites and dacites in orogenic belts and island arcs.
tholeiitic and calc-alkaline rocks using an A–T–M diagram. Our new classifications offer two significant advantages over the previous decision boundaries. First, they go beyond simple binary decisions and quantify the extent to which an igneous rock belongs to either suite. Second, they clarify the distinction
A primary division of igneous rock series into two groups, alkalic and sub-alkalic (calc-alkalic, calcic), has long been recognized. Tables contrasting the mineralogical characters of rock types of the two groups have been given by Harker' and by Tyrrell ; and in gen-eral a rock series can be readily placed in this twofold classification.