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Dacite
Dacite

Icelandite
Icelandite



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Dacite
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Icelandite

Dacite and Icelandite

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1 Definition
1.1 Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
1.2 History
1.2.1 Origin
Romania and Moldova, Europe
Iceland
1.2.2 Discoverer
Unknown
Ian S. E. Carmichael
1.3 Etymology
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Volcanic
Volcanic
1.6 Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Aphanitic to Porphyritic
Aphanitic to Porphyritic
2.2 Color
Bluish - Grey, Brown, Grey, Light to Dark Grey
Bluish - Grey, Grey, Pink, Yellow
2.3 Maintenance
Less
More
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
2.4.2 Scratch Resistant
2.4.3 Stain Resistant
2.4.4 Wind Resistant
2.4.5 Acid Resistant
2.5 Appearance
Vesicular
Dull and Soft
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Entryways, Interior Decoration
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
3.1.2 Exterior Uses
As Building Stone, Paving Stone, Garden Decoration
Office Buildings, Roof Tiles
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping
Cobblestones, Construction Aggregate, for Road Aggregate
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts
Artifacts, Jewellery, Sculpture, Small Figurines
3.4 Other Uses
3.4.1 Commercial Uses
Commemorative Tablets, Creating Artwork
Cemetery Markers, Creating Artwork
4 Types
4.1 Types
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite
Not Available
4.2 Features
Host Rock for Lead, Is one of the oldest rock
Generally rough to touch, High silica content, Is one of the oldest rock
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
Not Yet Used
4.3.2 Famous Monuments
Not Applicable
Not Applicable
4.3.3 Sculpture
Not Yet Used
Used
4.3.4 Famous Sculptures
Not Applicable
Data Not Available
4.3.5 Pictographs
Used
Not Used
4.3.6 Petroglyphs
Used
Not Used
4.3.7 Figurines
Not Yet Used
Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
Dacitic magma is formed by the subduction of young oceanic crust under a thick felsic continental plate. Further, the Oceanic crust is hydrothermally altered as quartz and sodium are added.
Icelandite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.
5.2 Composition
5.2.1 Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
5.2.2 Compound Content
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide
Silicon Dioxide
5.3 Transformation
5.3.1 Metamorphism
5.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering
5.3.5 Erosion
5.3.6 Types of Erosion
Chemical Erosion
Chemical Erosion, Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
2-2.257
Coal
1 7
7.3.2 Grain Size
Medium to Fine Coarse Grained
Very fine-grained
7.3.3 Fracture
Conchoidal
Uneven
7.3.4 Streak
White
White
7.3.5 Porosity
Less Porous
Less Porous
7.3.6 Luster
Subvitreous to Dull
Vitreous
7.3.7 Compressive Strength
NANA
What Is Obsidian
0.15 450
7.3.8 Cleavage
Perfect
Not Available
7.3.9 Toughness
Not Available
1.1
7.3.10 Specific Gravity
2.86-2.872.5-2.8
Granite
0 8.4
7.3.11 Transparency
Translucent
Opaque
7.3.12 Density
2.77-2.771 g/cm32.11-2.36 g/cm3
Granite
0 1400
7.4 Thermal Properties
7.4.1 Specific Heat Capacity
0.92 kJ/Kg K2.39 kJ/Kg K
What Is Granulite
0.14 3.2
7.4.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
8 Reserves
8.1 Deposits in Eastern Continents
8.1.1 Asia
Not Yet Found
India, Indonesia, Japan, Nepal, South Korea
8.1.2 Africa
Not Yet Found
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
8.1.3 Europe
France, Greece, Romania, Scotland, Spain
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
8.1.4 Others
Not Yet Found
Not Yet Found
8.2 Deposits in Western Continents
8.2.1 North America
USA
Mexico, USA
8.2.2 South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
8.3 Deposits in Oceania Continent
8.3.1 Australia
New Zealand, South Australia, Western Australia
New South Wales, New Zealand, Western Australia

All about Dacite and Icelandite Properties

Know all about Dacite and Icelandite properties here. All properties of rocks are important as they define the type of rock and its application. Dacite and Icelandite belong to Igneous Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Icelandite is Aphanitic to Porphyritic. Dacite appears Vesicular and Icelandite appears Dull and Soft. The luster of Dacite is subvitreous to dull while that of Icelandite is vitreous. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas Icelandite is available in bluish - grey, grey, pink, yellow colors. The commercial uses of Dacite are commemorative tablets, creating artwork and that of Icelandite are cemetery markers, creating artwork.