Definition
Pantellerite is a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs
Origin
Strait of sicily
Adak, Aleutian Islands
Discoverer
Unknown
Defant and Drummond
Etymology
From Pantelleria, a volcanic island in the Strait of Sicily
From Adak, Aleutian Islands
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Texture
Eutaxitic
Porphyritic
Color
Dark Greenish - Grey
Black, Brown, Light to Dark Grey
Durability
Durable
Durable
Appearance
Layered and Foliated
Dull and Soft
Interior Uses
Not Yet Used
Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens
Exterior Uses
Not Yet Used
As Building Stone, As Facing Stone, Office Buildings
Other Architectural Uses
Not Yet Used
Whetstones
Construction Industry
NA
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Artifacts, Sculpture
Monuments, Sculpture, Small Figurines
Commercial Uses
Creating Artwork
Commemorative Tablets, Pottery, Used in aquariums
Types
Pantelleritic Ignimbrite
Not Available
Features
High Fe content
Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock
Archaeological Significance
Monuments
Not Yet Used
Used
Famous Monuments
Not Applicable
Data Not Available
Sculpture
Not Yet Used
Used
Famous Sculptures
Not Applicable
Data Not Available
Pictographs
Not Used
Used
Petroglyphs
Not Used
Used
Figurines
Not Yet Used
Used
Formation
Pantellerite 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.
Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.
Mineral Content
Amphibole, Feldspar, Ilmenite
Olivine, Plagioclase, Pyroxene
Compound Content
Al, Fe
Aluminium Oxide, MgO, Silicon Dioxide
Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering
Chemical Weathering, Mechanical Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Coastal Erosion, Sea Erosion, Water Erosion
Grain Size
Fine Grained
Fine to Medium Grained
Fracture
Sub-conchoidal
Conchoidal
Streak
Unknown
Bluish Black
Porosity
Less Porous
Less Porous
Luster
Earthy
Grainy, Pearly and Vitreous
Cleavage
Conchoidal
Not Available
Toughness
2
Not Available
Specific Gravity
Not Available
Not Available
Transparency
Translucent to Opaque
Opaque
Density
Not Available
Not Available
Resistance
Heat Resistant
Heat Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
China, India
India, Russia
Africa
Angola, Egypt, Madagascar, Namibia, Nigeria
Ethiopia, Somalia, South Africa
Europe
Germany, Iceland, Ireland, Italy, Spain, United Kingdom
Iceland
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada, USA
Canada, USA
South America
Argentina, Bolivia, Brazil, Colombia, Ecuador
Brazil
Deposits in Oceania Continent
Australia
Central Australia, Queensland, Western Australia
Not Yet Found