Sedimentary Cycle ; Exogenous (Surficial) processes; Weathering; Supergene enrichment; Mechanical concentration; Chemical concentration; Chemical deposition (Sedimentation); Evaporation; Resources from the Sedimentary Environments; Deposits formed by Evaporation Methods; placer deposits; residual deposits; laterite deposits; Supergene Secondary Enrichment Deposits; Manganese nodules; Manganese, iron deposits [Banded Iron Formation (BIF) and phanerozoic ironstones], Calcium carbonate; Uranium; Lead; Zinc; Copper deposit

1. LECTURE 7:
SEDIMENTARY MINERAL DEPOSITS
Prof. Dr. Hassan Z. Harraz
Geology Department, Faculty of Science, Tanta University
hharraz2006@yahoo.com
Spring 2020
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4. The Sedimentary Cycle
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5. “Ore genesis processes”
Formation of Mineral Deposits
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7. II) Exogenous (Surficial) processes: (solar, external heat driven largely)
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8. 1) Deposits formed by Weathering methods
Mechanical
Weathering
Chemical
Weatheri
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9. Residual Concentration by Mechanical Weathering
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10. Concentration of heavy minerals in placer deposits

11. Placer deposits occur in any area where current velocity is low, such as;
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12. ❑Residual (eluvial or laterite) Mineral Deposits :

13. Definition of Laterites

14. Secondary enrichment process
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❑Supergene Secondary Enrichment Deposits:

15. Zoning of Secondary enrichment process

17. Mineral Deposits and Geologic Processes
Mineral deposits may be found in a variety of plate tectonic settings.
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18. II) Exogenous (Surficial) processes
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20. Mineral Deposits formed as Depositional (Sedimentation) Methods
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21. Manganese Nodules
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Main features of Egyptian BIFs: (a) Macro- and meso- scale banding in one of
the least altered BIF samples from Gebel Semna (altered BIF). (b) Meso- and
(c) micro-scale banding (lamination) between alternating jasper (red)

24. Classification of
BIFs
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according to facies:
(Mineralogy of BIFs)
according to geologic
setting: Three main types of
banded iron formations are recorded
allover the world :

25. 3) Deposits formed by Evaporation Methods
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26. Resources from the Sedimentary Environments
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27. Economic mineral deposits that formed in arid and tropical/subtropical environments
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28. Deposits Formed by weathering and Sedimentation Processes
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29. Different weathering methods lead to form economic
mineral deposits
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30. Follow me on Social Media
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