Lub mine belongs rau subcategory ntawm volcanic provenance deposits nyob rau hauv lub continental lacustrine sedimentary diatomite hom. Nws yog ib tug loj deposit paub nyob rau hauv Tuam Tshoj, thiab nws scale yog tsis tshua muaj nyob rau hauv lub ntiaj teb no. Lub diatomite txheej alternates nrog av nplaum txheej thiab cov silt txheej. Lub geological seem yog nyob rau hauv lub sij hawm intermittent ntawm lub basalt eruption atherosclerosis. Lub stratum ntawm cheeb tsam mining yog qhia nyob rau hauv cov lus hauv qab no.
Lub spatial faib ntawm deposits yog tswj los ntawm paleo-tectonic qauv. Qhov loj volcanic toj roob hauv pes kev nyuaj siab tsim tom qab ib tug loj tus naj npawb ntawm volcanic eruptions nyob rau hauv lub Himalayas muab qhov chaw rau lub deposition ntawm diatoms. Qhov sib txawv ntawm lub pas dej thaum ub thiab cov underwater topography nyob rau hauv lub pas dej phwj ncaj qha tswj kev faib ntawm cov deposits. Qhov chaw marginal ntawm lub phiab yog cuam tshuam los ntawm cov dej ntws thiab qhov chaw nyob hauv sedimentary tsis ruaj khov, uas tsis tsim nyog rau kev ciaj sia thiab tsub zuj zuj ntawm diatoms. Nyob rau hauv nruab nrab ntawm lub phiab, vim yog dej tob thiab tsis txaus tshav ntuj, nws kuj tsis haum rau photosynthesis xav tau rau cov ciaj sia taus ntawm diatoms. Lub hnub ci illuminance, ib puag ncig sedimentary thiab SiO2 cov ntsiab lus hauv thaj chaw hloov pauv ntawm qhov chaw nruab nrab thiab ntug yog txhua yam ua rau kev nthuav tawm thiab sib sau ua ke ntawm diatoms, uas tuaj yeem tsim cov khoom lag luam zoo.
Cov pob zeb ore-bearing series yog Ma'anshan Formation sedimentary txheej, nrog thaj tsam ntawm 4.2km2 thiab thickness ntawm 1.36～57.58m. Lub ore txheej tshwm sim nyob rau hauv ore-bearing pob zeb series, nrog pom tseeb atherosclerosis nyob rau hauv txoj kev ntsug. Qhov ua tiav qhov sib dhos ntawm hauv qab mus rau sab saum toj yog: diatom av nplaum → av nplaum diatomite → av nplaum uas muaj diatomite → diatomite → av nplaum uas muaj diatom av → av nplaum diatomite → diatom av nplaum, muaj kev sib raug zoo ntawm lawv. Qhov nruab nrab ntawm qhov sib dhos muaj cov ntsiab lus siab ntawm diatoms, ntau txheej txheej, loj tuab, thiab cov ntsiab lus av nplaum tsawg; cov av nplaum cov ntsiab lus ntawm lub Upper thiab qis rhythms txo. Muaj peb txheej hauv nruab nrab ore txheej. Cov txheej hauv qab yog 0.88-5.67m tuab, nrog qhov nruab nrab ntawm 2.83m; txheej thib ob yog 1.20-14.71m tuab, nrog qhov nruab nrab ntawm 6.9m; txheej sab sauv yog txheej thib peb, uas tsis ruaj khov, nrog lub thickness ntawm 0.7-4.5m.
Cov pob zeb tseem ceeb ntawm cov ore yog diatom opal, ib feem me me uas recrystallizes thiab hloov mus rau chalcedony. Muaj ib qho me me ntawm av nplaum txhaws ntawm cov diatoms. Cov av nplaum feem ntau yog hydromica, tab sis kuj kaolinite thiab illite. Nws muaj ib tug me me ntawm detrital minerals xws li quartz, feldspar, biotite thiab siderite. Quartz nplej yog corroded. Biotite tau hloov mus ua vermiculite thiab chlorite. Cov tshuaj muaj pes tsawg leeg ntawm cov ore muaj xws li SiO2 73.1% -90.86%, Fe2O3 1% -5%, Al2O3 2.30% -6.67%, CaO 0.67% -1.36%, thiab ignition poob ntawm 3.58% -8.31%. 22 hom diatoms tau pom nyob hauv thaj chaw mining, ntau dua 68 hom, cov tseem ceeb yog cov discoid Cyclotella thiab Cylindrical Melosira, Mastella thiab Navicula, thiab Corynedia nyob rau hauv qhov kev txiav txim ntawm Polegrass. Genus kuj muaj ntau. Qhov thib ob, muaj cov genus Oviparous, Curvularia thiab lwm yam.
Post lub sij hawm: Jun-17-2021