GEO-ARTICLES

Replacement reactions (reaction rim/ corona)

In metamorphic petrology the reactions generally involves the replacement of minerals by their polymorphs and often the reactions may not complete. In many reactions, a pseudomorph may develop in which the new mineral retain the older minerals shape. “Some reactions produce intimate, typically wormy-looking intergrowths of two or more minerals called symplectite texture. Pseudomorphs may

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Carbonate Group

The carbonate mineral group form in the environment where water and carbon-di-oxide are present. The (CO3)– complex are basic building units of all carbonate minerals and are responsible for the properties to group. An acid test is widely used for identification of carbonates. Calcite Group (Hexagonal) Dolomite Group (Hexagonal) Aragonite Group (Orthorhombic) Calcite [CaCO3]Magnesite [MgCO3]Siderite

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Pi and Beta Diagram

Beta diagrams are generally preferred for analysis of faults, ore shoots, kink-bands and rotational manipulations but for complexly folded terrains, Pi diagrams are preferred. Beta diagram beta diagram A stereographic diagram which represents the trend and plunge of the line produced by the intersection of two planes. In its application in structural geology, the dip and strike of a fold surface / lineation/ bedding are recorded as a great circle,

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