Metamorphic kankara

A yanayi, akwai da dama iri na kankara: sedimentary, metamorphic da magmatic. Dukan su wakiltar fili wasu ma'adanai.

A wannan labarin, za mu tattauna a daki-daki, abin da metamorphic kankara. Mun bayyana iri, halaye da kuma hanyoyin da amfani a masana'antu.

Amma sama da dukan, shi ya gaya maka cewa irin wannan rawa. Wannan lokaci da aka amfani da su koma zuwa ga sinadaran yanayin da mahadi wanda aka kafa a cikin ɓawon burodi.

Metamorphic kankara ne sakamakon daukan hotuna zuwa high yanayin zafi da kuma karfi matsa lamba a kan ma'adanai na magmatic ko sedimentary asalin. A sunadarai abun da ke ciki na ma'adanai ba sha gagarumin canje-canje, amma su karɓo su wani sabon irin zane da tsari.

Mutane da yawa metamorphic ma'adanai ne daban-daban shale (gaban bakin ciki jirgin ruwa ake ɗaukar). Wannan halayyar nuna ma'adinai samuwar Hanyar (a karkashin matsin). Irin wannan ma'adanai suna da ikon karya a cikin wani bakin ciki farantin.

Idan aiwatar da mayar da wasu sauran ma'adanai (metamorphism) ya auku a karkashin aikin zafi intrusive taro a wata m zurfin, a wannan yanayin, metamorphic kankara zai yi rogovistuyu tsarin. Wannan ne exemplified da hornfelses (biotite, pyroxene, amphibolite) kafa daga lãka.

Kan aiwatar da metamorphism (canji) iya hõre wani ma'adanai - igneous, sedimentary ko metamorphic asalin. Duk wani canje sanya a cikin kankara ta wajen recrystallization a cikin m jihar. A mataki na canji na fara ma'adanai iya sosai bambancin, jere daga kananan gyare-gyare to babba canje-canje a cikin abun da ke ciki da kuma siffar da m. A yanayi na metamorphism ne ma daban-daban. Yana iya faruwa ne kawai a kananan hatimi, ko iya kammala recrystallization na ma'adinai.

All metamorphic kankara ne inherently sakandare samfurin. Dangane da mataki na hira, akwai da dama iri mika mulki ma'adanai:

• The lamba. Yana taso daga intrusion na magma (gabatarwar a cikin ƙasa ta ɓawon burodi) da hulda da sediments. Ma'adanai da irin wannan suna kafa a ƙarƙashin rinjayar matsa lamba da kuma zafi. Irin wannan burbushin da dangantaka marmara, skarn, migmatite. Species lamba metamorphism ne yawanci crystalline, m, kuma saccharoidal slabosloistoe tsarin, cikinsa da abun da ke ciki na ma'adanai preperpevaet gagarumin canje-canje.
• Regional (mai zurfi). gyara tsari faruwa a babban zurfin da babban matsin hulda, zafin jiki da kuma ruwaye. A mineralogical abun da ke ciki na ma'adanai a wannan yanayin, na yi ba ko da yaushe. Jinsi daban-daban crystalline shale, m tsarin.
• Dynamo metamorphism. A canji tsari ya auku a cikin tectonic faranti a karkashin babban matsin. A iri-iri na ma'adanai kafa wani karfi sashi na rushewar hadaddun folds. Wadannan burbushin ne mylonites da ka-taklazity.

Yawancin lokaci metamorphic kankara da ake samu a yanayin a cikin nau'i na veins, strata da ruwan tabarau. Su sau da yawa riƙe da asali nau'i na ma'adinai da ya faru, amma a lokacin da a lamba tare da intrusions magma ma'adanai iya irregularly dimbin yawa.

Metamorphic ma'adanai ake amfani a duniya a matsayin ado, gini da ornamental abu (quartzite, marmara, schist, gneiss). Suna kuma amfani da masana'antu albarkatun kasa (asbestos, talc, da dai sauransu). A yanayin da metamorphic kankara sau da yawa dake kusa da adibas na ma'adanai, da daraja, da Semi-duwatsu masu daraja (yaƙutu, Emerald, Jade, garnet, da dai sauransu).