alcatuirea si structura litosfereii
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ALCATUIREA SCOARTEI
MINERALE ŞI ROCI
Mineralele = substante chimice solide, mai rar fluide, alcatuite dinunul sau mai multe elemente chimice
De regulă sunt substanţe neomogene din punct de vedere chimic,fiind frecvent substanţe solide cristalizate, dar diferă prin duritate, culoare, compoziţie chimică.
ex. sare, cuart, pirita, galena, blenda, gips, feldspat, azbest, mica,
grafit, diamant
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EXEMPLE DE
MINERALELE
AUR
TALC
GIPS
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AGATSULF
PIRITA
CALCIT
SILVINAAZURIT+MALACHIT
APATIT
FLORIT
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CUARŢ
TOPAZ
DIAMANTE
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ROCILE
Sun an!a"#luri $e "ai "ule "inerale $e a%ela&i
i' !au $e i'uri $i(erie
Tipuri de roci:
A. ROCI MAGMATICE
C. ROCI METAMORFICE
B. ROCI SEDIMENTARE
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A) ROCILE MAGMATICE
Se (*r"ea, 'rin r,%irea &i !*li$i(i%area "a-"ei;
Tipuri:.) inru!i/e:formate n interiorul scoarţei terestre !granit"
0) e(ui/e1formate la suprafaţa scoarţei,prin ntărirea lavei !bazalt"
-rani
-rani
#aal
#aal
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2) ROCILE SEDIMENTARE
Sun r*%ile (*r"ae 'rin $i/er!e 'r*%e!e (ii%e &i %3i"i%e)#n fucţie de procesul ce le generează se clasifică:
.) R*%i $erii%e4 (*r"ae 'rin $ea-re-area r*%il*r 'ree5i!ene
a. $ecimentate: %&'('T)*, +)T&)*, $)-)+, /01&)
b. 2imentate: 3&2)), 2'$%0'&4T, %&-)), 4&%)00) R*%i $e 're%i'iare4(*r"ae 'rin 'r*%e!ul $e 're%i'iare 6n *nele ari$e
5gips, calcar, sare gemă
7) R*%i *r-n*-ene4 (*r"ae 'rin $e!%*"'unerea *r-ani!"el*r
6 cărbuni !superiori: antracit, huila; inferiori: cărbune brun, lignit, turba",
petrol, chihlimbar
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C) ROCI METAMORFICE
S4au (*r"a 'rin ran!(*r"area %el*rlale i'uri $e r*%i la e"'erauri &i
're!iuni (*are "ari4 'r*%e! nu"i "ea"*r(i!";Tipuri: marmură, 7isturi cristaline, 7isuri verzi
Ta8 Ma3alMar"ur,
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Prof. RĂDUCAN SORIN
2013