000			01647nab a2200205 4500
005			20260608201646.0
008			260224s2010 xxu
100	1		_aHedegaard, Kathrine _942942
100	1		_aBorre, Mai Kristine _942943
100	1		_aAlam, Mohammad Monzurul _942944
245	0	0	_aBiot's coefficient as an indicator of strenght and porosity reduction _bCalcareous sediments from Kerguelen Plateau
260			_a _b _cfeb. 2010
270			_a17/06/2010 ; 17/06/2010
300			_a16 p. ; 282-297
520			_aTranscripción del resumen del autor. Chalk develops as a result of diagenesis of pelagic calcareous ooze. In a newly deposited ooze sediment, porosity ranges from 60% to 80% but porosity reduces with burial. We studied how different porosity reduction mechanisms change the strength of these deep sea carbonate-rich sediments and effect Biot's coefficient, ß. In calcareous ooze, ß is one. Mechanical compaction reduces porosity, but only leads to a minor decrease in ß. Recrystallization renders particles smoother, but does not lead to reduction in ß unless it gives rise to pore stiffening cementation. Pore stiffening cementation causes ß to fall, even when porosity remains constant. Biot's coefficient correlates with strength-indicating properties: compressional and shear modulus, oedometer modulus, yield strength, strain from direct loading and creep strain. Our data indicate that ß may be used for predicting the diagenetic process involved in porosity reduction and strengthening of chalk during burial diagenesis.
581			_a3-4
773			_g
942			_cARTICULO
999			_c171164 _d171164