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SEDIMENTARY ORGANIC MATTER (OM), WhatsApp Image 2020-10-28 at 10.46.43,…
SEDIMENTARY ORGANIC MATTER (OM)
WHAT SEDIMENTARY OM?
The soft tissues of plants and animals are made of organic molecules.
Derived from Carbon
Inorganic carbon
total 18%
Organic carbon
total 82%
OM Origin?
Allochthonous
Debris produced at one environment then transported to other environment
Autochthonous
Debris produced in depositional environment (same environment)
Is buried & preserved in sediment
ENVIRONMENTAL SEDIMENT PRODUCTION
1) Marine
Come from:
zooplankton, reefs & invertebrates
2) Non-marine
Come from:
plant rich environments
MACERAL
Can be petroleum & coal
(More to coal)
Liptinite
Produce
good quality
of petroleum/coal
Shape: algal & spore-like
Vitrinite
Derived from plant tissues
Very
useful thermal maturity indicator
(Vitrinite reflectance, Ro).
Inertinite
Produce
very low quality
of petroleum
Derived from
"dead carbon"
KEROGEN
Insoluble in organic solvent
OM capable in petroleum production
Is a diagenesis product
3 types:
Type 1: long aliphatic chains
Type 2: Medium aliphatic chain
Type 3: aromatic rings, short chains
Classification:
Phytoclasts
Palynomorphs
Amorphous
WHAT'S IN COAL?
Vitrinites
Woot
Roots
Bugs
Inertinites
Charcoal
Ash
Sediments
Minerals
Liptinites
Spores
Leaf cuticles
FARHAH NABILAH BINTI FADZIL
E18A0028
