Dacite and Evaporite

Dacite

Evaporite

Definition

Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite

A water-soluble mineral sediment resulting from concentration and crystallization by evaporation from an aqueous solution

History

Origin

Romania and Moldova, Europe

USA

Discoverer

Unknown

Usiglio

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 a sediment left after the evaporation

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Soft Rock

Family

Group

Volcanic

Not Applicable

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Earthy

Color

Bluish - Grey, Brown, Grey, Light to Dark Grey

Colourless, Green, Grey, Silver, White

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Stain Resistant

Wind Resistant

Yes

Acid Resistant

Appearance

Vesicular

Glassy, Vesicular and Foilated

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, Paving Stone, Garden Decoration

As Building Stone, As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping

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

Medical Industry

Not Yet Used

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork

Used in the manufacture of Ceramic Powder, Used in the preparation of Sulfuric Acid and Silicon Diborite

Types

Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite

Not Available

Features

Host Rock for Lead, Is one of the oldest rock

Generally rough to touch, Splintery, Veined

Archaeological Significance

Monuments

Not Yet Used

Famous Monuments

Not Applicable

Sculpture

Not Yet Used

Famous Sculptures

Not Applicable

Pictographs

Used

Petroglyphs

Used

Figurines

Not Yet Used

Fossils

Absent

Present

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.

Evaporite is water-soluble mineral sediment which forms from concentration and crystallization by evaporation from an aqueous solution.

Composition

Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Calcite, Cancrinite, Gypsum, Kyanite, Magnetite

Compound Content

Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide

CaMg(CO₃)₂, CaO, Calcium Sulfate, KCl, MgO, NaCl

Transformation

Metamorphism

Yes

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Not Applicable

Erosion

Yes

Types of Erosion

Chemical Erosion

Not Applicable

Properties

Physical Properties

Hardness

2-2.25

2-3

Grain Size

Medium to Fine Coarse Grained

Fracture

Conchoidal

Streak

White

Porosity

Less Porous

Luster

Subvitreous to Dull

Compressive Strength

Not Available

225.00 N/mm²

Cleavage

Perfect

Toughness

Not Available

Specific Gravity

2.86-2.87

2.86-2.99

Transparency

Translucent

Density

2.77-2.771 g/cm³

2.8-2.9 g/cm³

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Not Yet Found

Not Available

Africa

Not Yet Found

Not Available

Europe

France, Greece, Romania, Scotland, Spain

United Kingdom

Others

Not Yet Found

Deposits in Western Continents

North America

USA

South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Colombia, Paraguay

Deposits in Oceania Continent

Australia

New Zealand, South Australia, Western Australia

Central Australia, Western Australia

Summary >>

<< Reserves

All about Dacite and Evaporite Properties

Know all about Dacite and Evaporite properties here. All properties of rocks are important as they define the type of rock and its application. Dacite belongs to Igneous Rocks while Evaporite belongs to Sedimentary Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Evaporite is Earthy. Dacite appears Vesicular and Evaporite appears Glassy, Vesicular and Foilated. The luster of Dacite and Evaporite is subvitreous to dull. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas Evaporite is available in colourless, green, grey, silver, white colors. The commercial uses of Dacite are commemorative tablets, creating artwork and that of Evaporite are used in the manufacture of ceramic powder, used in the preparation of sulfuric acid and silicon diborite.