Abstract:

Studyofinternal-tidedepositsisarelativelynewresearchfieldindeep-watersedimentology．Sincethefirstexampleof internal-tidedepositswasidentifiedin1990,sedimentologistshavemadegreatefforts,discoveredaseriesofexamplesofinternal-tide deposits,summarizeddepositionalcharacteristics,sedimentarysuccessions,anddepositionalmodelofinternal-tidedepositsidentified. Internal-tidedepositsareconsideredasapotentialreservoirofoilandgas.Butsofar,theexamplesofinternal-tidedepositsidentified are very limited. A series of problems in the study of internal-tide deposits remain to be solved. First, the existing criteria for identificationandrecognitionofinternal-tidedepositsarenotperfect.Second,thetypicalexamplesofmoderninternal-tidedepositsare verylimited.Soitisdifficulttofullyunderstandtheimpactofinternaltidesonsedimentation.Third,relevantresearchresultsof marinephysicshavenotbeenappliedintostudyofinternal-tidedeposits,relatedsimulationexperimentsofinternal-tidedepositshave notbeencarriedoutandthedepositionalcharacteristicsofinternal-tidesexistinginancientstratahavenotbeenusedtoinvestigatethe physicalcharacteristicsofinternaltides,whicharecriticaltostudytheformationprocess,formationmechanism,formationcondition, andformationenvironmentofinternal-tidedeposits.Finally,understandingofthesignificanceofinternal-tidedepositsisnotenough.In futureresearch,relevantresearchresultsofmarinephysicsshouldbecombinedtoobserveandstudymoderninternal-tidedeposits,and
relatedsimulationexperimentsofinternal-tidedepositsshouldbecarriedout.Inaddition,inversionresearchofancientinternal-tidal depositsalsoshouldbecarriedout.Furthermore,theoreticalstudiesshouldbecombinedwiththeoilandgasresourcesinorderto betterpromotethedevelopmentofinternal-tidedepositsresearch.

Key words:  internalwave;internal-tidedeposits;modernsedimentation;depositionalmodel;existingproblems