Ososayensi bathole ukushisa okumangalisayo ngemuva kwenyanga. Ucwaningo olusha luhlonze umthombo onelukuluku wale hotspot engaqondakali: Kungenzeka ukuthi isuka emisebeni yemvelo yediphozithi enkulu yegwadle engcwatshiwe, etholakala kuphela Emhlabeni.
Abacwaningi bakholelwa ukuthi intaba-mlilo ethule enyangeni ebingasebenzi iminyaka eyizigidi eziyizinkulungwane ezingu-3.5 ingase ibe umsuka walokhu kwakheka kwegwadle.
NgokukaMatt Siegler, umbhali oholayo wocwaningo ovela ePlanetary Science Institute eTucson, Arizona, ukwakheka kwegwadle eNyangeni kufana kakhulu noMhlaba kunalokho obekucatshangwa ngaphambilini, naphezu kokuntuleka kwamanzi namapuleti tectonics akhona emhlabeni (njengoba kushiwo. phakathi ku isitatimende sephephandaba).
USiegler noRita Economos baseSouthern Methodist University bathola ubufakazi bokushisa ngaphansi kwenyanga ngokusebenzisa ama-microwave ngendlela entsha yokukala amazinga okushisa ngama-orbiter aseShayina i-Chang'E 1 no-2. Ukwengeza, idatha evela ku-NASA's Lunar Prospector kanye ne-Lunar Reconnaissance Orbiters yasetshenziswa ucwaningo lwabo.
Abacwaningi bathola indawo ecishe ibe ngu-50 km ububanzi lapho izinga lokushisa lalicishe libe ngu-10°C ngaphezu kwendawo ezungezile. Le ndawo ibekwe ngaphansi kwendawo eyindilinga ebusweni egcwele i-silicon futhi kukholakala ukuthi iyindawo yentaba-mlilo engasekho eyagcina ukuqhuma eminyakeni eyizigidi eziyizinkulungwane ezingu-3.5 edlule. Kuphakanyiswa ukuthi i-magma eshiywe ngenxa yentaba-mlilo isekhona futhi ikhiqiza imisebe ngaphansi.
I-Economos iphawule esitatimendeni ukuthi kutholwe i-batholith engu-50 km ububanzi. Lolu hlobo lwamatshe entaba-mlilo lwakhiwa lapho udaka oluncibilikisiwe lukhuphuka kodwa lungafinyeleli phezulu. Amatshe egwadle amabili aqhathanisekayo, i-El Capitan ne-Half Dome, atholakala e-Yosemite, e-California, afinyelele phezulu.
Embikweni wabo oshicilelwe kujenali Nature ngo-Julayi 5, abacwaningi baveza abakutholile ekuqaleni, futhi ulwazi olwengeziwe lwanikezwa eNgqungqutheleni ye-Goldschmidt ye-geochemistry e-Lyon, e-France, ngoJulayi 12.
Esitatimendeni, uStephen M. Elardo, isazi sokuma komhlaba eNyuvesi yaseFlorida ongazange ahlanganyele kulolu cwaningo, wabiza lokho okutholwe ngokuthi “kuthakazelisa ngendlela emangalisayo.” U-Elardo waqhubeka waphawula ukuthi igwadle litholakala yonke indawo eMhlabeni, kodwa hhayi kwamanye amaplanethi esimiso sonozungezilanga.
Uphawule ngokuthi ama-granite countertops atholakala yonke indawo emakhishini, kodwa ubunzima bokuwenza ngaphandle kokuba khona kwamanzi kanye nenqubo ye-plate tectonics yingakho engavamile ukubonakala kwamanye amaplanethi. Ngakho-ke, uma ucwaningo oluvela ku-Siegler nethimba labo kuqinisekiswa ukuthi lunembile, lungaba nomthelela omkhulu ekuqondeni kwethu ingaphakathi lezinye imizimba enamatshe ku-Solar System kanye nokwenzeka ekusetshenzisweni kwazo kwesikhathi esizayo.
Ukusetshenziswa kwemithombo yamandla avuselelekayo kuyakhula, futhi abantu abaningi ngokwengeziwe baphendukela kulolu hlobo lwamandla njengendlela esebenzayo kunemithombo evamile. Lokhu kushintshwa kungenxa yokwanda kokuqwashisa ngemiphumela yemvelo yemithombo yamandla angavuseleleki, kanye nezinzuzo zezomnotho zokusebenzisa amandla avuselelekayo. Ngenxa yalokhu, ohulumeni abaningi namabhizinisi batshala imali emithonjeni yamandla avuselelekayo, efana namandla omoya namandla elanga, ukuze banciphise i-carbon footprint yabo futhi bafake isandla eplanethini enempilo.
