Dacitic magma tau ntsib nyob rau hauv ib lub qhov drillhole thaum lub sij hawm tshawb nrhiav geothermal ntawm Kīlauea hauv 2005. Ntawm qhov tob ntawm 2488 m, magma ntws los ntawm qhov dej. Qhov no ua rau ob peb kilograms ntawm ntshiab, tsis muaj xim vitric (iav, tsis-crystalline) txiav ntawm qhov chaw.
Dacite pom nyob qhov twg hauv ntiaj teb?
Dacite muaj nyob hauv lava ntws, lava domes, dikes, sills, thiab cov khib nyiab pyroclastic. Nws yog hom pob zeb feem ntau pom ntawm continental crust saum toj no subduction zones, qhov twg cov me nyuam yaus dej hiav txwv phaj tau yaj hauv qab.
Dacite volcano yog dab tsi?
Dacite yog ib qho hluav taws kub, pob zeb hluav taws kub nrog cov ntsiab lus hlau siab pom ntawm ntau lub lava-domes. Dacite (pronounced /deɪsaɪt/) yog lub pob zeb tsis muaj zog, volcanic pob zeb nrog cov ntsiab lus hlau siab. … Dacite kuj txhais los ntawm silica thiab alkali cov ntsiab lus hauv TAS kev faib tawm.
Dacite ua los ntawm dab tsi?
zoo li andesite, dacite muaj feem ntau ntawm plagioclase feldspar nrog biotite, hornblende, augite, lossis enstatite thiab feem ntau muaj cov qauv porphyritic (tawg tawg loj dua cov muaju hauv cov av nplua nuj); Tsis tas li ntawd, txawm li cas los xij, nws muaj quartz raws li qhov sib npaug, corroded siv lead ua los yog nplej, los yog raws li ib feem ntawm …
Dacite zoo li cas?
Dacite yog lub roob hluav taws sib npaug ntawm granite. Pab pawg - volcanic. Xim - sib txawv, tab sis feem ntau bluish-grey los yog grey daj. Kev ntxhib los mos - feem ntau porphyritic.
