I-Golden obsidian

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I-Golden obsidian

IGolden obsidian, ebizwa nangokuthi yi-sheen obsidian noma i-sheen obsidian iyitshe liqukethe amaphethini wamabhamuza wegesi, asele ekugelezeni kwe-lava, ahlanganiswe eduze kwezendlalelo ezakhiwe njengoba idwala elincibilikisiwe laligeleza ngaphambi kokuphola. Lawa mabhamu akhiqiza imiphumela ethandekayo ibukeka njenge-sheen yegolide.

Obsidian

I-Obsidian ingilazi yomswakama-mlilo eyenziwa ngokwemvelo eyakhiwe njengedwala eliqhakazile elingenalutho.
Kukhiqizwa lapho i-felsic lava ikhishwa kusuka ku-volcano ibanda ngokushesha ngokukhula okuncane kwekristalu. Ngokuvamile kutholakala ngaphakathi kwemigqa ye-ryolitic lava flows eyaziwa ngokuthi i-obsidian flows, lapho ukwakheka kwamakhemikhali, okuqukethwe okuphezulu kwe-silica kubangela ukuvela okuphezulu okuthi lapho sekupholile ngokushesha, kwakheke ingilazi yemvelo evela kumakhaza. Ukuvinjwa kokuqhekeka kwe-athomu ngokusebenzisa le lava e-viscous kakhulu kuchaza ukungabikho kokukhula kwekristalu. I-Obsidian ilukhuni, ayisiqholo, futhi i-amorphous, ngakho-ke iqhuma ngemiphetho ebukhali kakhulu. Esikhathini esedlule yayisetshenziselwa ukwenza amathuluzi okusika nokubhoboza futhi ibisetshenziswa njengezivivinyo njengezici zokuhlinzwa zesikali se-scalpel.

Okufana namaminerali

Hhayi amaminerali eqiniso ngoba njengengilazi akuyona i-crystalline, ngaphezu kwalokho, ukwakheka kwayo kuhluka kakhulu ukuthi kungahlukaniswa njengamaminerali. Ngezinye izikhathi ihlukaniswa ngokuthi i-mineraloid. Yize i-obsidian imvama ngombala omnyama, ifana namatshe e-mafic anjenge-basalt, ukwakheka kwe-obsidian kuyinto eyindida ngokweqile. I-Obsidian iqukethe ikakhulu i-SiO2, i-silicon dioxide, imvamisa i-70% noma ngaphezulu. Amatshe e-Crystalline anokwakhiwa kwe-obsidian afaka i-granite ne-rhyolite. Ngoba i-obsidian iyabonakala emzimbeni womhlaba, ngokuhamba kwesikhathi ingilazi iba amakristalu amile kahle amaminerali, akukho okutholakele kumdala okudala kuneminyaka yobudala beCretaceous. Lokhu kwehlukaniswa kwe-obsidian kusheshiswa ubukhona bamanzi. Ukuba nokuqukethwe kwamanzi aphansi lapho kusanda kwakhiwa, ngokuvamile kungaphansi kwamanzi we-1% ngesisindo, i-obsidian iba namandla kancane kancane lapho ivezelwa amanzi asemhlabeni, yakha i-perlite.

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