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1、02第二章矿床学基础(The02andsecondchaptersofdepositScience)ThesecondchapteristhebasisofmineraldepositsSection1BasicConceptsDEPOSITNo.1Mineraldeposit:ageologicalbodythatcanbeusedintheexistingeconomicandtechnologicalconditions,whichisformedbygeologicalactioninthecrustanditsqualityandquantitymeettheindustri
2、alrequirements.Thedepositconsistsoforebodiesandsurroundingrocks,andmayincludeoneormoreorebodies.Mineraldeposit:ageologicalbodythatcanbeusedintheexistingeconomicandtechnologicalconditions,whichisformedbygeologicalactioninthecrustanditsqualityandquantitymeettheindustrialrequirements.Thedepositcons
3、istsoforebodiesandsurroundingrocks,andmayincludeoneormoreorebodies.1.Syngeneticdeposits(syngeneticdeposits):theorebodiesandthesurroundingrocksareformedsimultaneouslyornearlysimultaneouslyduringthesamegeologicalprocess.2,epigeneticdeposits(epigeneticdeposits):theformationoforebodiesisobviouslylat
4、erthanakindoforedepositsinthesurroundingrock.Two.Orebodyandsurroundingrock1.Orebody(orebody):anindependentgeologicalbodycomposedofore(ore)andgangue(gangue),isthemaincomponentofthedeposit,andisthemainobjectofminingandutilization.Theorebodyhasacertainshape(form/morphology),sizeandoccurrence(modeof
5、occurrence),andoccupiesacertainspatialposition,surroundedbysurroundingrocks.2,(countryrock,hostrockrock,wallrock):referstotheorebodyofsurroundingrock,theboundaryofsomeveryclear(suchasvein),andsomeshowedgradualtransition(suchascomposedofveinletdisseminatedoreore).3,parentrock(motherrock):refersto
6、theformationoforedeposits,providingthesourceofmineralrocks.Itiscloselyrelatedtooredepositsinspaceandgenesis.Magnesianchromiterocksarethemotherrocksofchromitedeposits,suchaschromitedepositsinthemagnesianrichultrabasicrocksformedbymagmaticcrystallizationdifferentiation.4,theshapeoftheorebody(formo
7、forebody),namelytheshapeoftheorebody.Theorebodiesaredividedintothreebasictypesaccordingtothelengthratiooftheorebodyinthespaceofthreedegrees1)equiaxedorebody:threeorebodiestobalancetheextension,suchasnodule(diametertensofmete