petrology of igneaous rocks

A) WHY STUDY IGNEOUS PETROLOGY?

Igneous petrology is a key component to understanding how the Earth works as a system. Igneous rocks are also the source of metals in many types of ore deposits, thus understanding the behavior of metals in igneous processes is fundamental to mineral exploration.

C) Petrology (from Ancient Greek πέτρος (pétros) 'rock' and -λογία (-logía) 'study of'),

 is the branch of geology that studies rocks, their mineralogy, composition, texture, structure and the conditions under which they form,

D)-petrography

Petrography is a branch of petrology that focuses on detailed descriptions of rocks. The mineral content and the textural relationships within the rock are described in detail.

The classification of rocks is based on the information acquired during the petrographic analysis.

Petrographic descriptions start with the field notes at the outcrop and include macroscopic description of hand-sized specimens.

The most important petrographer's tool is the petrographic microscope. The detailed analysis of minerals by optical mineralogy in thin section and the micro-texture and structure are critical to understanding the origin of the rock.

Igneous petrology

Is the study of magma and the rocks that solidify from magmaM Th us igneous petrologists are concerned with the entire variety of processes that describe how magmas are produced and how they ascend through the mantle and crust, their mineralogical and geochemical evolution, and their eruption or emplacement to form igneous rocks. Igneous petrology requires a working knowledge of mineralogy.

Definition of Igneous Rocks

• Igneous rocks form from cooling and Igneous rocks form from cooling and crystallization of molten rock crystallization of molten rock- magma;