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Curs 02 Granofaciesul sedimentar

Sedimentologie si sisteme depozitionale Lect. dr. Relu D. Roban. Curs 02 Granofaciesul sedimentar. Scara granulometrica Udden-Wentworth. Reprezentări ale datelor granulometrice. Cheel (2005). Parametrii granulometrici. Inman ( 1952 ). Modul (Mo). Indice de clasticitate (C). P1.

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Curs 02 Granofaciesul sedimentar

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  1. Sedimentologiesisistemedepozitionale Lect. dr. Relu D. Roban • Curs 02 • Granofaciesulsedimentar

  2. Scara granulometrica Udden-Wentworth

  3. Reprezentări ale datelor granulometrice Cheel (2005)

  4. Parametrii granulometrici Inman (1952) Modul (Mo) Indice de clasticitate (C) P1 P50 Mediana (Md) Media (Mz) Deviatia standard (σ) Asimetria (Sk) Ascutimea (K)

  5. Comparator vizual pentru estimarea sortării funcţie de abaterea standard Clasificarea tipurilor de sortare in functiede valorile deviatiei standard, in phi,Compton (1962) din Davis, (1992).

  6. Asimetria (Sk)

  7. Ascutimea (K) Curbe: leptocurtice K>1 (ascutite), platicurtice K<1 (plate) mezocurtice K=1 (apropiate de distributia normala).

  8. Denumirea distribuţie granulometrice Diagramăternară, Shepard (1954): 1 - nisip; 2 - nisip siltic (prăfos); 3 - nisip lutitic (argilos); 4 - nisip lutito-prăfos; 5 - silt (praf); 6 - silt nisipos; 7 - silt lutitic (argilos); 8 - silt argilo-nisipos; 9 - lutit (argilă); 10 - lutit (argilă) nisipos; 11 - lutit (argilă) prăfos; 12 - lutit (argilă) silto-nisipos (după) Diagramă ternară, Folk(1954)

  9. McManus (1988)

  10. Aprecieri ale dinamicii sedimentelor Segmentele linerare pe curba cumulativa si semnificatia acestora in termenii dinamicii sedimentelor, Visher, (1969) fide McManus, (1988)

  11. Aprecieri ale mediilor sedimentare

  12. Aprecieri ale mediilor sedimentare Plotarea indice de clasticitate vs mediana, Pasega (1964), si interpretarea segmentelor in termeni de mediu depozitional si conditii de transport al clastelor, fide McManus, (1988).

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