Video: Sparite yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Sparite yog cov ntxhib crystalline calcite cement uas nyob hauv qhov chaw pore hauv ntau limestones tom qab tso tawm, tsim los ntawm nag lossis daus ntawm calcite los ntawm carbonate-nplua nuj daws hla dhau qhov pore qhov chaw hauv cov sediment.
Yog li ntawd, Micrite yog ua los ntawm dab tsi?
Micrite yog limestone constituent tsim los ntawm calcareous hais nyob rau hauv txoj kab uas hla mus txog plaub Μm tsim los ntawm recrystallization ntawm txiv qaub av nkos. Micrite yog txiv qaub av, carbonate ntawm av nkos qib. Nyob rau hauv Folk classification microite yog lub pob zeb carbonate dominated los ntawm nplua-grained calcite.
Ib tug kuj yuav nug, dab tsi yog carbonate ib hom? Carbonate pob zeb yog ib chav kawm ntawm cov pob zeb sedimentary uas muaj feem ntau ntawm carbonate cov ntxhia. Ob tug loj hom yog limestone, uas yog tsim los ntawm calcite lossis aragonite (cov ntaub ntawv sib txawv ntawm CaCO3) thiab dolomite pob zeb, tseem hu ua dolostone, uas yog tsim los ntawm pob zeb hauv av dolomite (CaMg (CO)3)2).
Ib yam li ntawd ib tug yuav nug, qhov twg Micrite nrhiav tau?
piav qhia: Kev ntxhib los mos zoo heev; microite yog carbonate av nkos (feem ntau feem ntau ntawm cov pob zeb carbonate); npub, opaque, thiab aphanitic hauv tes qauv; dawb rau dub. Keeb Kwm: Ua los ntawm cov pob zeb zoo ntawm cov av nkos hauv cov cheeb tsam uas tsis tshua muaj tam sim no lossis yoj ua haujlwm; feem ntau pom nyob rau hauv central qhov chaw ntawm hiav txwv.
Yuav ua li cas carbonates huab cua?
Tag nrho carbonates huab cua haum yooj yim; cov evaporites yog yooj yim soluble hauv dej, tab sis cov calcium carbonates thiab dolomite muaj tsawg solubilities nyob rau hauv circumneutral av thiab ua tau persist los yog txawm tsim nyob rau hauv cov av nyob rau hauv semi-arid rau arid ib puag ncig.
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