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PSIMMITHO

psimitho

PSIMMITHO (yunoni psammites—regi, az psammos — peg), j i n s h o i regi, jinshoero guyand, ki ziyoda az 50%-i onhoro donahoi mineral va jinsporahoi andozaashon az 0,05 to 1 mm tashkil medihand. Khelhoi poshkhurandai Psimmithoro reg va khelhoi sementshudai onro regsanz menomand. Psimmitho tarkiban ba jnnshoi monominerali (beshtar kvartsdor), oligomikti (beshtar kvartsu shpathoi dashtidor) va poliminerali (reghoi arkozi va grauvakkaho) taqsim meshavand. Psimmitho asosan dar natijai farsoishi mekhanikii jinshoi kuhi va kuchida jam shudani jinsporaho ba vujud meoyand. Dar nohiyahoi nazdikuhi, odatan, qabathoi gafs va az mineralhoi gunogun boi Psimmitho jam meshavand. Dar hamvoriho boshad, qabathoi nachandon  gafsi Psimmitho mavjudand, ki onho az donahoi kvarts va digar mineralhoi ba farsoish tobovar tarkib yoftaand. Baze Psimmitho khud bevosita sarvati zerizaminiand (masalan, peg va regsang masolehi binokoriand) yo dar tarkibashon neftu gaz, bazan almos, tillo, platina va metallhoi digari poshkhurdaro dorand.

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