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1 Petrology of Sedimentary Rocks G421P13, summer semester, 2/1 hours, 3-4th year 2. Carbonates I. – mineralogy, components, structures, sedimentary environments Karel Martínek Institute of Geology and Palaeontology
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mineralogy, components, structures, sedimentary environments · 37 sedimentary environments microfacies concept (Wilson 1975, Flügel 1972, 1982, 2004)

Apr 18, 2018

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Page 1: mineralogy, components, structures, sedimentary environments · 37 sedimentary environments microfacies concept (Wilson 1975, Flügel 1972, 1982, 2004)

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Petrology of Sedimentary Rocks

G421P13, summer semester, 2/1 hours, 3-4th year

2. Carbonates I. –mineralogy, components, structures, sedimentary

environments

Karel MartínekInstitute of Geology and Palaeontology

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mineralogycalcite (low Mg, high Mg), aragonite, dolomite

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componentsooids, pisoids, peloids, aggregates, intraclasts, bioclasts, algae, stromatolites, carbonate mud, Folk`s classification (1962)

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study of ultrastructures – to better identify particular bioclasts

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biomineralization

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structuresteepee, hardgrounds, birdseyes, palaeocarst, structural classification(Dunham 1962)

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sedimentary environmentsmicrofacies concept (Wilson 1975, Flügel 1972, 1982, 2004)

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continental - lacustrine, pedogenesis, calcretes

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marine - carbonate platforms: rimmed shelf (bioherms, carb. reefs), ramps

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intertidal - supratidal

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lagoonal carbonates

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intertidal – subtidalsand barscarb. shelf

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pelagic - CCD

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cyclicity

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24.5E) Eccentricity Cycle:

413 Kyr 123 Kyr 95 Kyr

O) Obliquity Cycle: 56 Kyr 41 Ky r

P) Precession Cycle: 23 Kyr 19 Ky r

MILANKOVITCH ORBITAL CYCLE S

E

O

P

"400 Kyr "

"100 Kyr "

"40 Kyr "

"21 Kyr "

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E) Eccentricity Cycle:404 kyr124 kyr95 kyr

O) Obliquity Cycle:54 kyr41 kyr29 kyr

23 kyr19 kyr

P) Axial Precession Cycle:

Milankovitch Orbital Cyclicity

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interplay of Milankovitch cycles driven glacioeustacy and basin subsidence

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Reading:M.E.Tucker: Sedimentary petrology. 3rd ed. Blackwell, 2001(2003).M.E.Tucker&V.P.Wright: Carbonate Sedimentology. Blackwell, 1994.P.A.Scholle et al. (eds): Carbonate depositional environments. AAPG Memoir 33, 1983.Bathurst R.G.C. (1979): Carbonate sediments and their diagenesis. Developments in sedimentology 12, Elsevier, Amsterodam.