Miyala Metamorphic

Mu chikhalidwe, pali mitundu ingapo ya miyala: nyanja, metamorphic ndi magmatic. Onsewo kuimira pawiri ena mchere.

M'nkhani ino tikambirana mwatsatanetsatane zimene miyala metamorphic. Ife kufotokoza mitundu, makhalidwe ndi njira za ntchito pakampani.

Koma koposa zonse, tiyenera kukuuzani kuti miyala amenewa. Mawu amenewa amagwiritsidwa ntchito ponena chikhalidwe mankhwala mankhwala amene anapanga mu matanthwe a.

Metamorphic miyala ndi chifukwa cha kukhudzana kwa kutentha ndi kuthamanga kwambiri mchere chiyambi magmatic kapena nyanja. Mipweya ya mchere si zimasintha kwambiri, koma tikhale ndi kapangidwe latsopano ndi dongosolo.

Ambiri metamorphic mchere shale osiyana (pamaso pa Timitengo woonda). khalidwe Izi zikusonyeza mchere mapangidwe njira (opanikizika). mchere amenewa angathe gawanikani mbale woonda.

Ngati ndondomeko ya kusintha zina mchere (metamorphism) limapezeka pa zochita za kutentha misa intrusive pa akuya osaya, mu nkhani iyi, miyala metamorphic adzakhala ndi dongosolo rogovistuyu. Izi anapereka chitsanzo cha hornfelses (biotite, pyroxene, amphibolite) anapanga dongo.

The ndondomeko ya metamorphism (kusinthika) akhoza pansi Mchere iliyonse - igneous, nyanja kapena chiyambi metamorphic. masinthidwe opangidwa mu miyala mwa recrystallization mu boma olimba. Mlingo wa kusintha kwa mchere kuyambira akhoza yosiyanasiyana, kuyambira wamng'ono zosintha kusintha ndithu mu kapangidwe ndi mawonekedwe a malasha ndi. Chikhalidwe cha metamorphism ndi osiyana komanso. Izo zikhoza kudzachitika pokhapo chisindikizo yaing'ono, kapena kumaliza recrystallization ya mchere ya.

miyala yonse metamorphic ndi mankhwala analandira sekondale. Malinga mlingo wa kutembenuka, pali mitundu ingapo ya mchere kusintha:

• Kukhudzana. Vutolo limachitika kwa kulowerera kwa chiphalaphala (oyamba mu matanthwe a pansi padziko) ndi anzake ake ndi m'dambo lapansi. Mchere wa mtundu uwu anapanga mchikakamizo cha kuthamanga ndi kutentha. malasha amenewa anafotokoza nsangalabwi, skarn, migmatite. Species kukhudzana metamorphism ndi ambiri crystalline chachikulu, ndipo saccharoidal slabosloistoe dongosolo, momwe zikuchokera mchere preperpevaet kusintha kwakukulu.
• Regional (kwambiri). kusinthidwa ndondomeko kukuchitika kuya kwambiri ndi kuthamanga mogwirizana, kutentha ndi madzi. The zikuchokera mineralogical ya mchere mu nkhani iyi, ine sindiri nthawi zonse. Zimaswana osiyana crystalline shale, kapangidwe zolimba.
• Dynamo metamorphism. Kusinthika akupezeka mbale tectonic pansi kuthamanga. Mu zosiyanasiyana mchere anapanga zone amphamvu kutha ndi makutu zovuta. mafupawa Awa mylonites ndi ka-taklazity.

miyala zambiri metamorphic zimapezeka chikhalidwe mu mawonekedwe a mitsempha, strata ndi magalasi. Kawirikawiri nawobe mtundu wapachiyambi wa zosayembekezereka mchere, koma pamene anakumana ndi mchere intrusions chiphalaphala akhoza zoumbika mosiyanasiyana.

Metamorphic mchere ntchito padziko lonse monga zokongoletsera, nyumba ndi chuma yokongola (quartzite, nsangalabwi, schist, gneiss). Iwo ntchito monga zipangizo mafakitale yaiwisi (asibesitosi, talc, etc.). Khalidwe la miyala metamorphic zambiri ili pafupi madipoziti mchere, wapatali ndi theka-miyala ya mtengo (rube, emarodi, yade, garnet, etc.).