Dab tsi yog slate? Yuav ua li cas slate tsim?

Slate tuaj yeem siv rau lub ru tsev, pem teb lossis lub vaj. Nws kuj yog ib lub pob zeb zoo nkauj zoo nkauj. Muaj ntau yam pob zeb ntuj. Dab tsi yog slate? Ntau tus neeg tsis paub ntau txog lub pob zeb no. Yuav ua li cas slate tsim? Tsis txhob txhawj, cia peb piav qhia rau sawv daws hauv qab no, cia peb saib ua ke.

Dab tsi yog slate?

Slateyog lub pob zeb uas muaj cov qauv zoo li phaj thiab yeej tsis muaj recrystallization.Nws yog pob zeb metamorphic. Cov pob zeb qub yog argillaceous, silty lossis nruab nrab tuff, uas tuaj yeem tev rau hauv nyias nyias raws cov kev taw qhia ntawm lub phaj. Nws yog tsim los ntawm me ntsis metamorphism ntawm clayey, silty sedimentary pob zeb los yog nruab nrab-acid tuffaceous pob zeb thiab sedimentary tuff.

Vim yog lub cev qhuav dej, qhov nyuaj ntawm cov pob zeb qub yog txhim kho, tab sis cov ntxhia hauv cov ntxhia hauv cov ntsiab lus tsis yog recrystallized, nrog cov qauv residual sib txawv thiab cov qauv tsis sib xws, thiab cov tsos yog ntom thiab cryptocrystalline. Muaj feem ntau me me ntawm sericite thiab lwm yam minerals nyob rau ntawm lub rooj tsavxwm nto, uas ua rau lub rooj tsavxwm nto me ntsis spun silky luster. Slate feem ntau muaj npe raws li cov xim sib txawv, xws li dub carbonaceous slate, grey-ntsuab calcareous slate. Nyob rau hauv qis-qib thermal contact metamorphism, cov pob zeb ntiav metamorphic nrog speckled thiab phaj zoo li cov qauv tuaj yeem tsim, feem ntau hu ua "speckled pob zeb". Slate tuaj yeem siv los ua cov khoom siv hauv tsev thiab cov khoom siv kho kom zoo nkauj, thiab nyob rau lub sijhawm qub, nws tau siv los ua cov vuas hauv thaj chaw nplua nuj hauv slate.

Yuav ua li cas slate tsim?

Kev tsim ntawm slate, zoo li sandstone, yog vim lub zog ntawm lub ntiaj teb crust, thiab cov xuab zeb thiab xis mas (silica, calcium carbonate, av nplaum, hlau oxide, calcium sulfate, thiab lwm yam) yog compressed thiab bonded los ntawm lub sij hawm ntev lub zog loj. . sedimentary pob zeb. Tam sim no, cov xim tseem ceeb yog lub teeb xiav, dub, lub teeb ntsuab, paj yeeb, tan, lub teeb grey, daj thiab lwm yam. Slate tsis yog tsuas yog nplua nuj nyob rau hauv kev ntxhib los mos, tab sis kuj nyuaj hauv kev ntxhib los mos, quaint xim, tsis tshua muaj dej nqus, thiab tsis muaj hluav taws xob muaj kuab lom.

Cov ntxhia muaj pes tsawg leeg feem ntau yog mica, ua raws li chlorite, quartz, thiab ib qho me me ntawm pyrite thiab calcite. Cov slate tshiab muaj ntau cov xuab zeb, ntau calcium thiab pyrite, thiab muaj zog lithology. Lub cev ore yog calcareous sericite slate thiab nplua sericite slate, nrog ib txheej tuab ntawm 1-5cm.

Cov pob zeb ntiav metamorphic yog tsim los ntawm me ntsis metamorphism ntawm clayey, silty sedimentary pob zeb los yog nruab nrab-acid tuffaceous pob zeb thiab sedimentary tuffs. Dub los yog grey-dub. Lub lithology yog ntom thiab lub phaj cleavage yog tsim. Muaj feem ntau me me ntawm sericite thiab lwm yam minerals nyob rau ntawm lub rooj tsavxwm nto, uas ua rau lub rooj tsavxwm nto me ntsis spun silky luster. Tsis muaj qhov pom tseeb recrystallization tshwm sim. Nyob rau hauv lub microscope, qee cov ntxhia pob zeb xws li quartz, sericite thiab chlorite nrog kev faib tsis sib luag tuaj yeem pom, tab sis feem ntau ntawm lawv yog cov av nplaum cryptocrystalline thiab carbonaceous thiab hlau hmoov. Nrog variadic qauv thiab speckled qauv.

Lub pob zeb thawj pob zeb nrog cov qauv zoo li phaj yog feem ntau yog pob zeb argillaceous, argillaceous siltstone thiab nruab nrab acid tuff. Slate yog cov khoom lag luam qis hauv cheeb tsam metamorphism. Nws qhov kub thiab txias isotropic tsis siab, thiab nws feem ntau cuam tshuam los ntawm kev ntxhov siab. Metamorphic pob zeb nrog argillaceous thiab silty Cheebtsam raws li lub ntsiab Cheebtsam, feem ntau argillaceous thiab silty Cheebtsam, thiab phaj-zoo li cleavage tsim metamorphic pob zeb tsuas yog tsim ntawm argillaceous thiab silty Cheebtsam. Nws tuaj yeem siv los ua lub tsev pob zeb, stele, inkstone thiab lwm yam khoom siv pob zeb.

Tau ntau xyoo, pob zeb ntuj tau ua pov thawj tias yog ib qho ntawm cov khoom siv hauv pem teb nrov tshaj plaws. Lawv muaj qee cov khoom muaj peev xwm ua rau lawv zoo tagnrho rau chav dej hauv pem teb. Slate, lub pob zeb ntuj, muaj cov khoom siv hauv tsev uas ua rau nws cov khoom siv hauv chav dej zoo tagnrho.