Obsidian feem ntau yog dub. Cov xim no yog ua los ntawm feeb suav nrog thiab cov muaju me me hauv khob. Liab xim yog tshwm sim los ntawm tib yam khoom uas muab xim liab rau weathered bas alt, suab puam xuab zeb thiab K-feldspar. … Obsidian feem ntau yog tsaus thiab nws qhov chaw ci ntsa iab.
Vim li cas obsidian dub yog tias nws yog felsic?
Obsidian feem ntau yog xim av xim av lossis xim dub. Tsis zoo li bas alt, obsidian cov xim tsaus yog vim ntau cov impurities ntau dua li qhov muaj cov xim tsaus nti. Cov xim ntawm obsidian nyob ntawm cov tshuaj muaj pes tsawg leeg ntawm impurities.
Puas yog obsidian xim dub?
Txawm hais tias obsidian yog feem ntau dav hlau-dub hauv cov xim, muaj cov hematite (hlau oxide) tsim cov xim liab thiab xim av, thiab suav nrog cov npuas me me tuaj yeem tsim kom muaj xim kub. sheen. Lwm hom uas muaj cov kab tsaus nti lossis mottling hauv grey, ntsuab, lossis daj kuj paub.
Vim li cas pob zeb obsidian thiaj li muaj lub ntsej muag dub?
Obsidian yog tsim thaum lub roob hluav taws felsic lava txias sai sai nrog kev loj hlob tsawg kawg nkaus. Cov tshuaj (hodium silica cov ntsiab lus) tsim cov viscosity siab uas tsim lub iav ntuj los ntawm lava thaum ziab sai.
Obsidian tau nws cov xim li cas?
Obsidian yog qhov tshwm sim ntawm volcanic lava tuaj rau hauv dej. Feem ntau cov lava nchuav rau hauv lub pas dej lossis dej hiav txwv thiab txias sai sai. Cov txheej txheem no tsim ib qho kev ntxhib los mos hauv cov pob zeb uas tshwm sim. Hlauthiab magnesium muab obsidian tsaus ntsuab rau xim dub.
