Kondinendi yechisere .. Zealandia inyika inotyisa uye zvakavanzika kwekutanga

Pakadzika inosvika 3500 metres (1066 metres) pasi pemafungu eSouth Pacific panogara kondinendi yakarasika yechisere, iyo yakakura yakanyura pasi, inonzi Zealandia, yakasimbiswa nesainzi sekondinendi muna 2017, asi havana kukwanisa kudhirowa. mepu inoratidza kufara kwayo.

Zealandia iri pasi pemvura yePacific Ocean, kumaodzanyemba kwakadziva kumadokero, uye kunoratidzika kuti New Zealand yemazuva ano yaingova chikamu chayo.

"Takagadzira mamepu aya kuti tipe mufananidzo wakarurama, wakakwana, uye wemazuva ano weNew Zealand geology neSouthwest Pacific - zviri nani pane zvataimbova nazvo," akadaro Nick Mortimer, anotungamira timu.

Ndezvipi zvinoshamisa zvinomwe zvenyika zvakafadza nyika?

Mepu yeMortimer et al.'s bathymetric mepu yakatenderedza Zealandia, chimiro nekudzika kwepasi pegungwa, mukuwedzera kune data rayo retectonic, yakaratidza nzvimbo chaiyo yeZealandia, kuyambuka tectonic plate miganhu.

Mepu dzakaratidzawo ruzivo rutsva nezve kuti Zealandia, iyo yakanyudzwa mamirioni emakore apfuura, yakaumbwa.

Zvinoenderana neruzivo rutsva, Zealandia inovhara nzvimbo inosvika mamirioni maviri masikweya mamaira (5 miriyoni mativi emakiromita), ingangoita hafu yehukuru hwekondinendi iri pedyo yeAustralia.

Kuti udzidze zvakawanda nezve kondinendi yakanyura, Mortimer nechikwata chake vakagadzira mamepu eZealand uye pasi pegungwa pakaitenderedza. Mepu yebathymetric yavakagadzira inoratidza kuti makomo ekondinendi uye mitsetse yakamira sei pamusoro pemvura.

Mepu inoratidzawo mahombekombe egungwa, uye mazita makuru epasi pegungwa. Mepu chikamu che global initiative Kugadzira mepu yese yepasi pegungwa panosvika 2030.

Zvinotendwa kuti Zealandia yakaparadzana neAustralia makore angangosvika mamirioni makumi masere apfuura, uye yakanyura pasi pegungwa nekutsemuka kweiyo supercontinent yaizivikanwa seGondwana Land.

Mortimer akanga ambotsanangura kuti geologists vakanga vawana, mukutanga kwezana remakore rapfuura, zvidimbu zvegranite kubva kuzvitsuwa zviri pedyo neNew Zealand, uye metamorphic matombo muNew Caledonia anoratidza continental geology.