:%

~!1217 D~'f/-]'-C-~NATIION OF ~ LnCATION AND CONT~'ECT!VI.'VY OF .rP~ =C<7/~ES IN ~-'~T,<u.ORFH.IC ROCK ',,HTH I~-HOLE ~RAC L'L-~ Z

Hmri~e, 1%" Groundwater, V!9, '~, ~,[ay-June 1980, P252-261

In-hole tracers ".'ere used to locate fractures in e bcreho!e and suppleme:~ed other methods, such as core inspection, geophysicel logs and packer tests. For the study Of connectivity, in-hole tracer methods "were developed to supp- lement the investigation of hydraulic response and the use of between-well tracer tes%s.

~i12!8 DENSITY D~'£'~.~fNATIONS OF ~ASIC VOLC~NYC ROCKs OF THE Y'F~_LOWKNIFE ~IPERGROUP BY GRAVITY k ~ A S U P ~ , - - ' ~ S IN ~,fffNE SHAFTS - Y~T.OWK?gfFE, NORT~.dEST T~ITORIES

Olbb, R A; Thomc.% H D Geophysics, Vk5, .~, Jan 1960, P18-31

Neports mems~rements down to 15.°~m.

811219 E@LrfVAI.~[CE IN ELFEq/R. OvAGNEUIC (~.'RECU'ENCY) ?/)UND I }~

Verm_z, R K Geophys Prospect, V28, h~, Oct i~0, F776-791

Analyses the ~henomenon of eq~wuler~e (in which, in resistivity sourdin~ different combinations of thickness and resistivity of a layer lead to similar resistivity fun-.t!ons) in relation to electromo~netic sourdf ng ~dth horlzontzl co- p]an~r coils, ~per~icular coils, vertical co- ~lanar coils, and vertfcal cgaxial coils. Com.- pares "the resolution of e!ectrom~netlc and resistivity sounnlr~ for the different cases.

~i122© .3EI~.,C_C k_'EFI..~OD POR ~ DLETECTION OF SUBSITR~'ACE CAVITIES

PrapR~ , ?[; Muraour', P Geoxplormticn, V!8, ~'~, Aug i~0, P177-185

D~scusses the prlnc~ple of the differential method and reports recent improvements in equip- ment and date. processlr~..~ ~rtiei tr;,.ce inte- grat~ was constructed, to allow rapid detection of the '~coustlc anomalles. ,in e~losei sparker w a s ~!so developed.

5!!22- ~ USE OF ELECTg, 7CAL RESISTVJII'~f MET~[ODS FOR STUDY OF S0{.[E FAULTS IN ~ Jg.L%RIA COALFIELD, INDIA

Verm.a, R K; Bhuln, N C; Rao, C V Geoe×ploratlon, VIS, ~, Aug 1960, P201-220

9~,o pro:~Inent faults, L~ra fault and the South- ern Boundary fault, belonging to Jh~ria coal- field, India, h~ve been studied. A f~ norma/ configu_-:~tlons have been used to study the D~-ra fau/t, whereas the Southern Boundary fa%tlt has been studied using the horizontal profiles and vertical sourd~ngs azi~mthally. The results over the Du~u'a fault suggest +~he ~o-eleetrode

config-~r~+ion to be the most su/table one for mavplng this typic of discontinuity as far ss the shape and &mplltudes of the anomaly are con- cerned. The results over the Southern Bound°-ry fgult prove the usefulness of the azlrmltha] profiles in study of this type of discontinuity in the field. The half-SehlumJ0erger profiles give good indication of the fault. 7he ~'o- electrode Im'ofiles end soundings do not give useful indication of the fault due to small resistivity contr~st between the formstlons or. eith~7 side.

81 ~ 222 5~I~/DY OF TOPOG~&-mHIC %ND '.[!SORr~E.~ATION =-F~CTS IN MULTI~REC:~NCY ELECZqROVAGr~IC cOT~INGS

Sinha, A K Geoe×ploration, V18, bT, April !9~0, Pi!i-133

811223 TOPOGRAPHIC CORR~:TION FOR VLF-E?,~ F£CFUI2~< BAo~-"E'D ON !40DEL ,ffJ~.JgIES

Pak~m, H A; ~.[yers, J O Geoexplor~tion, V!~, Ne, April 196~0, F!35-14%

~ne ~[LF-~4 model applratus already described by the authors has been developed to provide ~- top~raF/qlc correction "~hich can be applied to field profiles o~ the reel component. The results from which the methed i~ derived ere given and the applicstion is demons*eated on field results obtained in hilly terrain. '~uth.

SI122[~ DATA PROCESSING S'v _STE?-,4 =OR ~ !~FgLETAUION OF G}%%Vr~,ff:~PR!C DATA (IN FRE'JC}{)

Seguin~ ~4 K; Grenon, :~ Geoexploratlon, VIS, ~.q, Feb !~C, 75!--4

Describes an Inter~ctlve data proces~ir~ system usirg a graphics CRT termincl which a!!.~=s ~. model ~o ~e cre,~ted and modified accordln~ to geo!(~ical constraints. The m_~in goe! of th~ syste::, is the rapid ar~ aectn~ate d.e~_rmi~z:tion of shape, size and structure of geclc~i-~ol bodies, and density contrasts. 7"he method can be applied both :o :r.~cro~-ravlmetry .~nd reg'onml gr.~vlmetry.

Presentation and interpretation of data

811225

See _also: 811113

%qRUCTURAL FF~iT~3RES OF SOIL Su!llv~n, R A; Prince, A Civil Engr~, London, March !9~0, .~25-29

Presents a systemetic procedure (based on core samp].es) for the qt~%ntitative evaluatlor, of macro-structure/ features in soil, ine!udlr~ consistency, msterlal gradin~ nrd meterlal L-ro- pertles, and for the recordlr~ of" other features such as d~scontlnulty spacir4~, weatherlr~ ard fissure classification.