1 Definition
1.1 Definition
Boninite is a mafic extrusive rock which is high in magnesium and silica content, formed in fore-arc environments, typically during the early stages of subduction
Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks
1.3 History
1.3.1 Origin
1.4.1 Discoverer
1.5 Etymology
From its occurrence in the Izu-Bonin arc south of Japan
From the Middle High German verb gneist (to spark; so called because the rock glitters)
1.7 Class
Igneous Rocks
Metamorphic Rocks
1.8.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
2.2 Family
2.2.1 Group
2.4 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
3 Texture
3.1 Texture
Aphanitic to Porphyritic
Banded, Foliated, Platy
3.3 Color
Bluish - Grey, Brown, Colourless, Green, Grey
Black, Brown, Pink, Red, White
3.4 Maintenance
3.5 Durability
3.5.2 Water Resistant
3.5.4 Scratch Resistant
3.5.6 Stain Resistant
3.6.1 Wind Resistant
4.1.2 Acid Resistant
4.2 Appearance
5 Uses
5.1 Architecture
5.1.1 Interior Uses
Decorative Aggregates, Homes, Kitchens
Countertops, Decorative Aggregates, Flooring, Interior Decoration
5.2.2 Exterior Uses
Garden Decoration, Office Buildings
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
5.2.4 Other Architectural Uses
5.4 Industry
5.4.1 Construction Industry
As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
As Dimension Stone
6.1.1 Medical Industry
Not Yet Used
Not Yet Used
6.3 Antiquity Uses
6.4 Other Uses
6.5.1 Commercial Uses
An Oil and Gas Reservoir, Cemetery Markers, Creating Artwork, Soil Conditioner, Source of Magnesia (MgO)
Cemetery Markers, Jewelry, Tombstones, Used in aquariums
7 Types
7.1 Types
Not Available
Augen Gneiss, Henderson Gneiss, Lewisian Gneiss, Archean and Proterozoic Gneiss.
7.2 Features
Available in Lots of Colors and Patterns, High Mg content, Is one of the oldest rock
Generally rough to touch, Is one of the oldest rock
7.3 Archaeological Significance
7.3.1 Monuments
7.3.4 Famous Monuments
Not Applicable
Konark Sun Temple in India, Washington Monument, US
7.3.5 Sculpture
Not Yet Used
Not Yet Used
7.3.7 Famous Sculptures
Not Applicable
Not Applicable
7.3.9 Pictographs
7.4.1 Petroglyphs
8.1.1 Figurines
Not Yet Used
Not Yet Used
8.3 Fossils
9 Formation
9.2 Formation
Boninite is a type of Igneous rock which is formed through the cooling and solidification of lava or existing rocks.
Gneiss is a high grade metamorphic rock i.e. it has been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of Gneiss forms from volcanic rock, shale or granitie.
9.3 Composition
9.3.1 Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite
Biotite, Chlorite, Feldspar, Garnet, Graphite, Hornblade, Micas, Muscovite or Illite, Quartz, Quartzite, Silica, Zircon
9.3.3 Compound Content
Silicon Dioxide
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
9.4 Transformation
9.4.1 Metamorphism
9.4.3 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism
Impact Metamorphism
9.4.5 Weathering
10.1.2 Types of Weathering
Biological Weathering
Biological Weathering, Mechanical Weathering
10.1.3 Erosion
10.1.4 Types of Erosion
Chemical Erosion, Coastal Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Sea Erosion
11 Properties
11.1 Physical Properties
11.1.1 Hardness
11.1.5 Grain Size
Fine Grained
Medium to Coarse Grained
11.1.7 Fracture
11.1.9 Streak
11.1.11 Porosity
Less Porous
Very Less Porous
11.1.12 Luster
11.1.13 Compressive Strength
11.1.16 Cleavage
11.1.18 Toughness
11.1.19 Specific Gravity
11.1.21 Transparency
Opaque
Translucent to Opaque
11.1.23 Density
Not Available2.6-2.9 g/cm3
0
1400
11.3 Thermal Properties
11.3.2 Specific Heat Capacity
11.3.3 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
12 Reserves
12.1 Deposits in Eastern Continents
12.1.1 Asia
Not Available
China, India, Iran, Iraq, Kazakhstan, Kyrgyzstan, Mongolia, Russia
13.1.2 Africa
South Africa
Cameroon, Ethiopia, Ghana, Kenya, Madagascar, Morocco, Mozambique, Namibia, Nigeria, Tanzania, Togo
13.1.4 Europe
England, Finland, United Kingdom
Albania, Austria, Bosnia and Herzegovina, Finland, France, Georgia, Germany, Hungary, Italy, Kosovo, Monaco, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, Switzerland, Ukraine, United Kingdom
13.1.6 Others
Antarctica, Greenland
Not Yet Found
13.2 Deposits in Western Continents
13.2.1 North America
USA
Canada, Costa Rica, Cuba, Mexico, Panama, USA
13.3.2 South America
Colombia, Uruguay
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru, Venezuela
13.4 Deposits in Oceania Continent
13.4.1 Australia
New Zealand, Western Australia
New South Wales, New Zealand, Queensland, Victoria