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Estimating crack parameters from observations of P-wave velocity anisotropy
2A
has aPl~eclable fabric cohesion desplte a lack of true mineral cement. Fa~rlc cmheslon, as opposed t o ceme~Itlous cohesion, i s strom@ly stress depemdent~ and l~acol~nites can be expected to have h i ~ curviline~r failure criteria. Atrhh. 811011 L A ~ T ~ Ivb~,n,OD FOR FREPARATION OF A LAYERED SOIL SYSTEM. TECHNICAL NOTE Mri~na M t ~ , M; N a s a 4 , T S; ~idharan, A GeOtech Test J, V2, N3, Sept 1979, P163-166
Texture, structure, composition and density
811017 S~APE OF ROCK PARTICLES, A CRITICAL KEVI~4 Barre~, P J Sedimentol~y, V27, N3, June 1980, F291-303 Discusses the shape of rock particles in terms of form, rOnn~r~Ss and surface texture, and attempts to discover by ama!ysie a=d empirical considerations the most a~pro~late parameters for describimg these aspects. 37 refs. 811018 CLAY ORIENTATION IN SOME ~ CARBONT~S MUDROCKS, ITS R E L A T I O N ~ P TO Q~JARrZ CORTEI~ AND SOME INF~2~EI~ES ABOUT FISSILITY, POROSITY AND COMPACTIONAL HISTORY C u r t i s , C D; Lipshle~ S R; Oe~tel, G Sedimentology, V27, N'3, June 1980, P333-339
See a l s o : 811225 811012 PARTICLE CONTACTS IN DISCRETE MATERIALS. TECHNICAL NOTE Athamaslou-Grlvas, D; HarT, M E J Geotech Emgng Div ASCE, Vl06, ~ , May 1980, Reports an experiment to investigate the relationahlp between particle c o n t a c ' c s amd porosity in granular materials.
811019 VENN DIAGRAM TO REPRESENT RO%~[ ATTRI~OTES Ptzlsey, C J J se~L~m Petrol, VSO, ~, June 1980, ~6~6-6~7 Describes a graPhical method f ~ r e ~ ' e s e n ~ l m g groups of rocks with one or m~re ~ i f l e d attributes, add avplies to sole st..~uzt~res on t~bldites. Another possible application mentioned is to inte~nsl struct~es of sanlstonss ar~ clastlc carbonates.
811013 GRANITIC ROCKS OF Y O S ~ T E V~r.r~[ AND AN IDEAL GRANITE M O D ~ Vistelius, A B; Haz~augh, J w J In~ Assoc Math Geol, VI2, NI, Feb 1980, P1-2~
811020 LABORATORY METHOD OF MEASURING IN-SITU DENSITY DISTRIBUTION IN DRY SAND Slr~h, G; Ergato%1~Is, J; Slab, B $ G e o t e c h Test J, V2, N3, Sept 1979, P129-135
Stochastic models of an ideal, a "degemara~e" ideal granite, amd two models for me~asomatically transformed granites have been com~ed vith s e q u e ~ e e e o f g r a i n s observed i n granitic r o c k s of Yose=Ite Valley, Callformla. Properties of the gramltic r o c k s appear t o show a relationship to t h e topo@raphy a~d s ~ ' e e ~ directions amd may reflect ~he bahaviour of t h e granitic rocks with r e s p e c t to fract~rlmg and wea%heri~. Auth.
Describes" a thermal ~robe employing unsteady~ state heat flow l~inclples. Fcm" "the samd used there is a linear relationship between thermal conductivity and density.
811oi~ PROGESSSIVELY C~;SOR~) SAMPLING OF ROCK JOINT TRACES Baecher, G B J Int Ass Math Octal, VI2, Feb 1980, P33-~0
811015 VARIATION OF DENSITY WITH ROCK TYPE, DEPTH AND FORMATION IN THE ~ CANADA BASIN FROM DENSI~ LOGS M~xant ~ J Geol~hyslcs, V ~ , N6, June 1980, PI06!-I076
811022 DYNAMIC LINEAR ELASTIC CP~CK PROPAGATION IN ANTI-PLANE ~ BY FINITE D A ~ ~ * ~ E E S Burgers, P Int J Fract, VI6, N~, June 1980, .~61-274 811023 zw~'~CT OF WATER ON THE SUBCRI~fICAL CRACK GROWTH IN sILICATE ROCKS waza, T; K~Ita, K; Mlzutaml, H Tec~o~slcs, V67, NI-2, 1 Aug 1980, P25-34
Reports an extensive s~udy of rock densities based on g ~ . ~ w , ~ lo~e frc~ ~3~ wells in the Western Canada Basin.
Modellimg t e c h n i q u e s have b e e n a~lled to obse~a~ons o f eramk imputed velocity a n i s o ~'Opy at %~ree m e ~ 4 ~ sl%es. It i s s t r a f e d that, if the d i p s mf the cracks i n a n u~ler~d rm~rac~ ean be amman, r~action measm'~s o f veloei~ a n l e o l n ~ can yield reliable est~ma~ea ~ average crack dens£tles, cr!en~aT.1ons ~ ~e~ree Of satt~atlon Of biplem~r systems o f c r a c k s .
811021 PERIODIC ARRAY OF IIVA~ACE CRACKS AND THEIR INT~CTION Sc~leser, D; Commlnou, M Ir~ J Solids Struct, VIS, NI2, 1979, P927-93~ Presem~s a simple model for s t u d y l : ~ i n ~ e r f a c e crack I n t e r a c ~ i o n vh1~h s h ~ s %hat s t r e s s i n t e n s i t y f ~ l ~ r s become ~ l l e z ' w l t h dscm'eastr~ @~.~e ~ e ~ q ~ n ~he c r a c k s . The slm'eed~z~ of an Interface crack Is ~hus inhi1~i~ed by the ~resence of ~dJacent cracks.
Discusses t h e ]~oblem of inferrlz~ Joim~ size amd p e r s i s t e n c e f r o m t h e d l s ~ z ' ~ b u t l o n o f %race lengths.
811016 ESTIMATING CRACK PARAM~'~RS FRCM O B ~ A T I O N S P-WAVE VELOCITY ANTSOTBOPY Cram;In, S; M c G ~ l e , R; Ba~ord, D Geol~hysics, V ~ , N3, March I~0, P3~-360
Fracture processes
OF
The relation bet~,teen the s t r e s s imtem~ity factor ard crack velocity in water sattu~ed amd air dried samples of amdesite a~d basalt was determined usimg the dcn~le tc~siOn method. The relates to the contribution of stress ~c~roslon crack~r~ in d~tatarny, creep a~ o~e~ eharacterl~lc behavl~ in. polym_~-FsTa~.ll~ s l l l c a ~ e rocks. 81102~ N U M ~ C A L M I ~ O D FOR DE~41NATIDN OF SOURCE TIME FU~ONS FOR G L ~ THREE DIMENSIONAL ~ J P ~ PROPAGATION Das, S Geo~Ys J R Astr Soc, V62, N3, Se.mt 1980,
has aPl~eclable fabric cohesion desplte a lack of true mineral cement. Fa~rlc cmheslon, as opposed t o ceme~Itlous cohesion, i s strom@ly stress depemdent~ and l~acol~nites can be expected to have h i ~ curviline~r failure criteria. Atrhh. 811011 L A ~ T ~ Ivb~,n,OD FOR FREPARATION OF A LAYERED SOIL SYSTEM. TECHNICAL NOTE Mri~na M t ~ , M; N a s a 4 , T S; ~idharan, A GeOtech Test J, V2, N3, Sept 1979, P163-166
Texture, structure, composition and density
811017 S~APE OF ROCK PARTICLES, A CRITICAL KEVI~4 Barre~, P J Sedimentol~y, V27, N3, June 1980, F291-303 Discusses the shape of rock particles in terms of form, rOnn~r~Ss and surface texture, and attempts to discover by ama!ysie a=d empirical considerations the most a~pro~late parameters for describimg these aspects. 37 refs. 811018 CLAY ORIENTATION IN SOME ~ CARBONT~S MUDROCKS, ITS R E L A T I O N ~ P TO Q~JARrZ CORTEI~ AND SOME INF~2~EI~ES ABOUT FISSILITY, POROSITY AND COMPACTIONAL HISTORY C u r t i s , C D; Lipshle~ S R; Oe~tel, G Sedimentology, V27, N'3, June 1980, P333-339
See a l s o : 811225 811012 PARTICLE CONTACTS IN DISCRETE MATERIALS. TECHNICAL NOTE Athamaslou-Grlvas, D; HarT, M E J Geotech Emgng Div ASCE, Vl06, ~ , May 1980, Reports an experiment to investigate the relationahlp between particle c o n t a c ' c s amd porosity in granular materials.
811019 VENN DIAGRAM TO REPRESENT RO%~[ ATTRI~OTES Ptzlsey, C J J se~L~m Petrol, VSO, ~, June 1980, ~6~6-6~7 Describes a graPhical method f ~ r e ~ ' e s e n ~ l m g groups of rocks with one or m~re ~ i f l e d attributes, add avplies to sole st..~uzt~res on t~bldites. Another possible application mentioned is to inte~nsl struct~es of sanlstonss ar~ clastlc carbonates.
811013 GRANITIC ROCKS OF Y O S ~ T E V~r.r~[ AND AN IDEAL GRANITE M O D ~ Vistelius, A B; Haz~augh, J w J In~ Assoc Math Geol, VI2, NI, Feb 1980, P1-2~
811020 LABORATORY METHOD OF MEASURING IN-SITU DENSITY DISTRIBUTION IN DRY SAND Slr~h, G; Ergato%1~Is, J; Slab, B $ G e o t e c h Test J, V2, N3, Sept 1979, P129-135
Stochastic models of an ideal, a "degemara~e" ideal granite, amd two models for me~asomatically transformed granites have been com~ed vith s e q u e ~ e e e o f g r a i n s observed i n granitic r o c k s of Yose=Ite Valley, Callformla. Properties of the gramltic r o c k s appear t o show a relationship to t h e topo@raphy a~d s ~ ' e e ~ directions amd may reflect ~he bahaviour of t h e granitic rocks with r e s p e c t to fract~rlmg and wea%heri~. Auth.
Describes" a thermal ~robe employing unsteady~ state heat flow l~inclples. Fcm" "the samd used there is a linear relationship between thermal conductivity and density.
811oi~ PROGESSSIVELY C~;SOR~) SAMPLING OF ROCK JOINT TRACES Baecher, G B J Int Ass Math Octal, VI2, Feb 1980, P33-~0
811015 VARIATION OF DENSITY WITH ROCK TYPE, DEPTH AND FORMATION IN THE ~ CANADA BASIN FROM DENSI~ LOGS M~xant ~ J Geol~hyslcs, V ~ , N6, June 1980, PI06!-I076
811022 DYNAMIC LINEAR ELASTIC CP~CK PROPAGATION IN ANTI-PLANE ~ BY FINITE D A ~ ~ * ~ E E S Burgers, P Int J Fract, VI6, N~, June 1980, .~61-274 811023 zw~'~CT OF WATER ON THE SUBCRI~fICAL CRACK GROWTH IN sILICATE ROCKS waza, T; K~Ita, K; Mlzutaml, H Tec~o~slcs, V67, NI-2, 1 Aug 1980, P25-34
Reports an extensive s~udy of rock densities based on g ~ . ~ w , ~ lo~e frc~ ~3~ wells in the Western Canada Basin.
Modellimg t e c h n i q u e s have b e e n a~lled to obse~a~ons o f eramk imputed velocity a n i s o ~'Opy at %~ree m e ~ 4 ~ sl%es. It i s s t r a f e d that, if the d i p s mf the cracks i n a n u~ler~d rm~rac~ ean be amman, r~action measm'~s o f veloei~ a n l e o l n ~ can yield reliable est~ma~ea ~ average crack dens£tles, cr!en~aT.1ons ~ ~e~ree Of satt~atlon Of biplem~r systems o f c r a c k s .
811021 PERIODIC ARRAY OF IIVA~ACE CRACKS AND THEIR INT~CTION Sc~leser, D; Commlnou, M Ir~ J Solids Struct, VIS, NI2, 1979, P927-93~ Presem~s a simple model for s t u d y l : ~ i n ~ e r f a c e crack I n t e r a c ~ i o n vh1~h s h ~ s %hat s t r e s s i n t e n s i t y f ~ l ~ r s become ~ l l e z ' w l t h dscm'eastr~ @~.~e ~ e ~ q ~ n ~he c r a c k s . The slm'eed~z~ of an Interface crack Is ~hus inhi1~i~ed by the ~resence of ~dJacent cracks.
Discusses t h e ]~oblem of inferrlz~ Joim~ size amd p e r s i s t e n c e f r o m t h e d l s ~ z ' ~ b u t l o n o f %race lengths.
811016 ESTIMATING CRACK PARAM~'~RS FRCM O B ~ A T I O N S P-WAVE VELOCITY ANTSOTBOPY Cram;In, S; M c G ~ l e , R; Ba~ord, D Geol~hysics, V ~ , N3, March I~0, P3~-360
Fracture processes
OF
The relation bet~,teen the s t r e s s imtem~ity factor ard crack velocity in water sattu~ed amd air dried samples of amdesite a~d basalt was determined usimg the dcn~le tc~siOn method. The relates to the contribution of stress ~c~roslon crack~r~ in d~tatarny, creep a~ o~e~ eharacterl~lc behavl~ in. polym_~-FsTa~.ll~ s l l l c a ~ e rocks. 81102~ N U M ~ C A L M I ~ O D FOR DE~41NATIDN OF SOURCE TIME FU~ONS FOR G L ~ THREE DIMENSIONAL ~ J P ~ PROPAGATION Das, S Geo~Ys J R Astr Soc, V62, N3, Se.mt 1980,