izindaba

Imayini ingaphansi kwesigaba esincane se-volcanic provenance deposits ohlotsheni lwe-continental lacustrine sedimentary diatomite. Kuyidiphozithi enkulu eyaziwa eChina, futhi izinga layo alivamile emhlabeni. Ungqimba lwe-diatomite lushintshana nongqimba lobumba nolwelwesi lukadaka. Isigaba sokwakheka komhlaba sitholakala enkathini yezikhawu phakathi kwesigqi sokuqhuma kwe-basalt. I-stratum yendawo yezimayini ikhonjisiwe kulelithebula elingezansi.

Ukusatshalaliswa kwendawo kwamadiphozithi kulawulwa iphethini ye-paleo-tectonic. Ukucindezeleka okukhulu kwe-volcanic landscape kwakheka ngemva kwenani elikhulu lokuqhuma kwentaba-mlilo e-Himalaya kwanikeza indawo yokubeka ama-diatom. Izingxenye ezihlukene zomgodi wasendulo kanye nesimo sezulu esingaphansi kwamanzi echibini lalilawula ngokuqondile ukusatshalaliswa kwamadiphozithi. Indawo eseceleni yomgodi iphazanyiswa imifula futhi imvelo ewugwadule ayizinzile, engahambisani nokusinda nokunqwabelana kwama-diatoms. Enkabeni yomgodi, ngenxa yamanzi ajulile kanye nokukhanya kwelanga okwanele, futhi ayihambisani ne-photosynthesis edingekayo ukuze kuphile ama-diatom. Ukukhanya kwelanga, indawo ezungezile ye-sedimentary kanye nokuqukethwe kwe-SiO2 endaweni yoguquko phakathi kwesikhungo nonqenqema konke kulungele ukusakazeka nokuqoqwa kwama-diatom, angakha imizimba yensimbi yezimboni yekhwalithi ephezulu.

Uchungechunge lwedwala eline-ore ungqimba lwe-Ma'anshan Formation sedimentary, olunendawo yokusabalalisa engu-4.2km2 nogqinsi luka-1.36～57.58m. Ungqimba lwe-ore lwenzeka ochungechungeni lwedwala eline-ore-bearing, elinesigqi esisobala endaweni eqondile. Ukulandelana kwesigqi esiphelele kusuka phansi kuya phezulu yilo: ubumba lwe-diatom → i-diatomite yobumba → i-diatomite enobumba → i-diatomite → i-diatom equkethe ubumba Umhlabathi → i-diatomite yobumba → ubumba lwe-diatom, kukhona ubudlelwano kancane kancane phakathi kwabo. Isikhungo sesigqi sinokuqukethwe okuphezulu kwama-diatom, izendlalelo eziningi ezingabodwa, ukushuba okukhulu, nobumba obuncane; okuqukethwe kobumba kwezigqi ezingenhla neziphansi kuncipha. Kunezingqimba ezintathu engxenyeni yensimbi ephakathi. Ungqimba olungezansi luwugqinsi oluyi-0.88-5.67m, nesilinganiso esingu-2.83m; ungqimba lwesibili luwugqinsi oluyi-1.20-14.71m, nesilinganiso esingu-6.9m; ungqimba olungaphezulu ungqimba lwesithathu, olungazinzile, olunogqinsi oluyi-0.7-4.5m.

Ingxenye yamaminerali eyinhloko ye-ore i-diatom opal, ingxenye encane yayo ephinda ihlanganise futhi iguqule ibe yi-chalcedony. Kukhona inani elincane lobumba eligcwaliswa phakathi kwama-diatom. Ubumba ikakhulukazi i-hydromica, kodwa futhi i-kaolinite ne-illite. Iqukethe inani elincane lamaminerali abulalayo njenge-quartz, i-feldspar, i-biotite ne-siderite. Izinhlamvu ze-quartz zigqwalile. I-Biotite ishintshiwe yaba i-vermiculite ne-chlorite. Ukwakheka kwamakhemikhali ensimbi kuhlanganisa i-SiO2 73.1% -90.86%, i-Fe2O3 1% -5%, i-Al2O3 2.30% -6.67%, i-CaO 0.67% -1.36%, nokulahlekelwa kokuvutha okungu-3.58% -8.31%. Izinhlobo ezingu-22 zama-diatom zitholakale endaweni yezimayini, izinhlobo ezingaphezu kuka-68, ezivelele yi-discoid Cyclotella ne-Cylindrical Melosira, i-Mastella ne-Navicula, ne-Corynedia ngokulandelana kwe-Polegrass. I-Genus nayo ijwayelekile. Okwesibili, kukhona uhlobo lwe-Oviparous, Curvularia njalonjalo.