Title: geology ppt 007
1 2WELCOME
3 CHAPTER -4 MINEROLOGY INTRODUCTION
MINERAL IS A NATURALLY AVAILABLE
MATERIAL
MINERALS FORMED USUALLY BY INORGANIC
PROCESS MINERALS ARE
THE BUILDING UNITS OF WHICH THE SOLID CRUST OF
THE EARTH IS MADE OF
4- PROPERTIES OF COMMON MINERALS
- QUARTZ GROUP
- FELDSPAR GROUP
- PYROXENE GROUP
- AMPHIBOLE GROUP
- MICA GROUP
- CARBONATES
- GYPSUM
- CLAY MINERAL GROUP
5FELDSPAR FELDSPAR ARE THE MOST
IMPORTANT ROCK FORMING MINERALS THEY OCCURS
CHIEFLY IN IGNEOUS ROCKS (ABOUT 60) AND ALSO
AVAILABLE IN GOOD PROPORTION IN METAMORPHIC
ROCKS. FELDSPAR ALSO AVAILABLE IN SOME
SEDIMENTARY ROCKS
6- FELDSPAR GROUP
- ORTHOCLASE
- MICROLINE
- ALBITE
- ANORTHITE
7- ORTHOCLASE
-
- COMPOSITION POTASSIUM ALLUMINIUM
SLICATE,KAlSI3O3 - CRYSTAL SYSTEM MONOCLINIC
- CLEAVAGE TWO SETS OF PERFECT CLEAVAGE
- COLOURVARIOUS SHADES PF PINK AND RED
- STREAKWHITE
- FRACTUREUNEVEN
- LUSTUREVITREOUS TO SUB VITREOUS
- HABITSPRISMATIC CRYSTAL,CRYSTAL TWIN
- HARDNESS6-6.5
- SPECIFIC GRAVITY2.56-2.58
- OCCURENCEIGNEOUS ROCK
- GRANITES
- DIAGNOASTIC FEAUTERSWHITE TO PINK COLOUR WITH
PERFECT CLEAVAGE PLANES - USEAS A CREAMIC MATERIAL
-
8COMPOSITION ALLUMINIUM SLICATE
9CRYSTAL SYSTEM MONOCLINIC , TRICLINIC
10CLEAVAGE PERFECT CLEAVAGE
11(No Transcript)
12- 2.MICROLINE
- COMPOSITIONPOTASSIUM
ALUMINIUM SILICATES,KAlSIO3 - CRYSTAL SYSTEMTRICLINIC
- CLEAVAGE PERFECT CLEAVAGE
- COLOUR BRIGHT GREEN ,CREAM WHITE
- STREAWHITE
- FRACTURE UNEVEN
- LUSTURE VITREOUS TO SUB VITREOUS
- HARDNESS6-6.5
- SPECIFIC GRAVITY2.54-2.57 OCCURRENCE
IGNEOUS ROCK - GRANITES
- DIAGNOSTIC FEATURES DISTINGUISHED FROM ORTHO
CLASS BY ITS BRIGHT RED COLOUR - VARIETIESANORTHOCLASE-IT CONTAINS ALSO SODIUM
SILICATES -
13STREAK WHITE STREAK COLOURLESS
14 FRACTURE UNEVEN
15 LUSTURE VITREOUS TO SUB VITREOUS
16HARDNESS
17Density and specific gravity
18HABITSPRISMATIC CRYSTAL,CRYSTAL TWIN
19- 3.ALBITE
- COMPOSITION SODIUM SALUMINIUM SILICATE WITH
NaAlSI3O8,100-90 AND CaAl2SI2O8,0-10 - CRYSTAL SYSTEMTRICLINIC
- CLEAVAGEPRESENT IN TWO DIRECTIONS
- COLOURCOMMONLY WHITISHOR PINKISH WHITE BUT SHOWS
SHADES OF GREY AND BLUE - STREAK COLOURLESS
- LUSTREVITREOUS TO PEARLY
- HARDNESS6-6.5
- SPECIFIC GRAVITY2.60-2.62
- OCCURRENCEIGNEOUS ROCKS,SUCH AS GRANITES
- USES 1.AS A CERAMIC MATERIALS
- 2.AS AN ORNAMENTAL STONE IN POLISHED
FORM -
-
20CRYSTAL SYSTEM AND GROUPS
21- 4.ANORTHITE
- C0MPOSITION CaAl2SI2O8,100-90
- CRSTAL SYSTEMTRICLINIC
- CLEAVAGE PRSENT IN TWO DIRECTIONS
- COLOURGENERALLY WHITE MAY OCCURS IN REDDISH AND
LIGHT GREY SHADE - STREAKCOLOURLESS
- LUSTURESEMI VITREOUS
- OCCURRENCE AN IMPORTANT CONSTITUENT OF MANY
BASIC TYPES OF IGNEOUS ROCKS - USE AS IN ALBITE
22OCCURRENCE
23USES OF FELDSPAR
24THANK YOU