MODE OF OCCURENCE OF MINERALS Flashcards
DIFFERENTIATE BETWEEN GEOLOGIST AND GEOGRAPHER
geographers- minerals associated with the earth’s crust for a better understanding of landforms. distribution of minerals and related to economic activities
geologists- formation, age, physical and chemical composition of minerals
modes of occurrences of minerals
B:Beds and layers
R:Residual mass of weathered materials
A:Alluvial deposits
V:Veins and lodes
O:Ocean water
how may igneous and metamorphic rocks occur
igneous or metamorphic rocks may occur through cracks,crevices,faults on the earths surface called veins and lodes.
smalller=veins+ less minerals
larger=lodes +more minerals
they are in molten or gaseous form and are forced upwards through cavities to the earths surface where they solidify and cool down
beds and layers
deposition, accumulation and concentration of minerals along the horizontal strata.
iron ore and coal= great heat and pressure over a long period of time
potash and gypsum= evaporation of water in arid regions
residual mass of weathered materials
decomposition of surface rocks and removal of soluble constituents leaving behind a residual mass of weathered materials-
eg:bauxite
alluvial deposits
in sands of valleys or case of hills
aka-placer deposits
minerals are not corroded by water
oceans
vast quantities of minerals
widely diffused so of no economic significance
eg=nacl,mg and bromidw
when does a reserve turn into a mine
when it is economically viable a reserve turns into a mine
what is backbone of industrial development
iron ore
which is the finest iron ore and what is its quantity of iron
why is it important
magnetite-70% iron
highly magnetic used in elecrical industry
most important industrial ore+iron quantity
important for what
haematite, 50-60%, industrial development
97% of iron ore from which states
karnataka, jharkhand,chhatisgarh,odisha
major iron belts
odisha-jharkhand-high grade haematite ore
badampahar mines-mayur bhanj and kendujhar districts
singhbhum jharkhans-gua and noamundi
durgbastar-chandrapur belt-high grade haematite ore used in steel making
bstar district= baila dila hills
ores are exported to japana nd south korea via vishakhapatnam port
ballari-chitradurga-chikkamangaluru-tumkuru0kudremukh mines
100%export
one of the largest
transported via slurry through a pipelineto mangaluru
maharashtra-goa- goa and ratnagiriexploited not high grade tho.
marmagoa port
manganese is used mainly for
steel and ferro manganese alloy. 10kg manganese for one tonne steel
painst, insecticides etc
why iron ore,manganese,coal and steel are near each other?
coal and manganese are required for manufacturing of iron ore and steel. saves on transportation cost and ease of availability
copper main mines
balaghat mines,singhbhum and khetri mines
importance of bauxite ore
provides-electrical conductivity,malleability and lightness
deposits of bauxite
amarkantak pleatau, maikal hills, bilaspur katni
odisha-bauxite
panchpatmali in koratpur
limestone uses
smelting iron and cement industry
mica properties
dielectric strength low power loss factors, insulating strength, resistance to high voltage
deposits-mica
chota nagpur pleatau, kodermagaya-hazaribhag range
ajmer-rajasthanl
nellore- ap
manganese largest producers
maharashtra, madhya pradesh and odisha
bauxite
odisha jharkhand gujarat
