Granodiorite Rock - A Complete Guide

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Granodiorite Rock - A Complete Guide
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Introduction

• Granodiorite is less known and used igneous
  rock falling in intrusive type. It is akin to
  granite in look but containing a high percentage
  of plagioclase (K Ca-rich) feldspar so looks
  off-white in color.

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Granodiorite Classification
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Physical Properties of Granodiorite
Parameter Value
Hardness 6
Grain size Medium to Coarse-Grained
Porosity Less porous
Luster Grainy, pearly, vitreous
Compressive strength 175.00 N/mm2
Specific gravity 2.6-2.7
Density  2.6-2.8 G/cm3
Specific heat capacity 0.79 KJ/Kg K
Resistance Heat wear-resistant
Streak  White 
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Mineralogy of Granodiorite
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• It contains less than 20 Quartz. Other minerals
  are plagioclase, which is always greater than 2/3
  of total feldspar. The plagioclase is with lesser
  orthoclase, Biotite, and amphibole (hornblende).
  It has Silica (SiO 2) content 63-69.
• It is felsic to intermediate in mineral content.
• It is an intrusive igneous rock.
• It has a large amount of sodium and calcium in
  plagioclase.
• It has potassium feldspar, some quartz, and a bit
  of muscovite mica.
• Biotite amphiboles give it a two-toned but
  darker look.
• Mica found in hexagonal crystals while hornblende
  found in needle-like crystals.

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Formation of Granodiorite

• It formed by the intrusion of silica-rich magma
  that eventually cools in stocks or batholiths
  below the earth surface. It exposes after uplift
  or erosion of the upper continental crust. The
  entire process takes place in three major steps,
  melting of magma, shifting, and solidification.
• The causes of melting are mainly an increase in
  temperature, reduction in pressure, or chemical
  changes. 
• Shifting could be intrusive means within the
  earth crust or extrusive out of the earth
  surface.
• Solidification may form with crystallization that
  ends with crystalline or granular rocks. If it is
  without crystallization, it ends with natural
  glasses. 

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Occurrence of Granodiorite

• Granodiorite is the result of fractional melting
  of a mafic parent rock, which takes place above a
  subduction zone. Thereby, it mainly found in
  volcanic arcs and cordilleran mountain building.
  For instance, when subduction takes place along
  the edge of a continent like it happened with the
  Andes Mountains. You can see that it emplaces in
  large batholiths, which are used to running for
  thousands of square miles. It eventually sends
  magma to the surface to produce composite
  volcanoes with and esite lavas.

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According to Wikipedia

• The erratic glacial boulder of Granodiorite is
  found in Plymouth Rock of the USA.
• A large deposit exists in the Sierra Nevada
  Mountains of the States of America.
• A big quarry was found at Mons Claudianus located
  in the Red Sea Governorate in Eastern Egypt.
• In New Zealand, some minor deposits found in
  Northland and the Coromandel Peninsula, west
  Nelson area, Westland, Fiordland, and Stewart
  Island.
• It found in Loda Pahar area of Bundelkhand in a
  massive deposit.

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Uses of Granodiorite

• It has limited applications in the construction
  industry.
• Due to high silica content, it is not ideal as
  aggregates mixing in cement concrete, but useful
  in other applications as crushed stone for road
  building. 
• It resembles granite a lot, so it is good as
  dimensional stones for exterior
  applications like paving for patios, paths, and
  even pool deck. 
• It is ideal as ornamental stone thanks to its
  Rosetta stone-like appearance. Thereby, it is a
  better choice for facing, foyers, and porches. 
• The portico columns of the Pantheon in Rome are
  formed from single shafts of Granodiorite. Each
  shaft is 12 meters tall by 1.5 meters in
  diameter.

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Who Will Provide You Granodiorite?

• World of Stones USA is an ideal destination to
  obtain natural stones for exterior applications.
  Now, we know Granodiorite is a choice for
  exterior applications and some industrial usages
  as the crushed stones. You will find the best
  quote, top quality, and excellent service as well
  as perfect guidance in consulting at the World of
  Stones and its distributors existing nearby you.

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Thank You

• Contact Us
• https//worldofstonesusa.com
• info_at_worldofstonesusa.com

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Source

• https//worldofstonesusa.com/blog/granodiorite-roc
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