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  </ul><BR><BR><table width='100%'><tr><TD><font class=custom000><font color=#000000><table width='100%' cellspacing=0 cellpadding=0><tr><td width='3%'></td><TD><font class=custom2><font color=#000000 face='times New roman'><B>Núcleo da Terra tem ouro para cobrir todo o planeta, afirmam cientistas. E o metal vem subindo à superfície. umsoplaneta.globo.com</b></font></font></td><td width='3%'></td></tr></table></font></font><font class=custom010><font class=custom00><font color=#35282D>&nbsp;&nbsp;&nbsp;&nbsp;26 de maio de 2025, segunda-feira<Br>&nbsp;&nbsp;&nbsp;&nbsp;Atualizado em <i>23/06/2025 03:21:21</i></font></font><center><div style='width:90%;bgcolor:#999999;'><p align=left><table cellspacing=0 cellpadding=0><tr><td><font class=custom1g><font color=#666666>•&nbsp;&nbsp;Imagens&nbsp;</font><font class=custom1g>(1)</font></td></tr></table><table cellspacing=0 cellpadding=0 cellspacing=4 cellpadding=0><tr><TD><font class=custom1g><font color=#666666><B> •</b></font>&nbsp;&nbsp;</td><td><select name='' class=custom1g style='width:300px;background-color:#ffffff;color:#666666;' onchange='this.options[this.selectedIndex].value && (window.location = this.options[this.selectedIndex].value);'><option value=''>Temas (2)</option><option value=b.asp?autor=565>Curiosidades (0)</option><option value=b.asp?autor=449>Ouro (0)</option></select></td></tr></table></p></div></center><BR><center><div style='width:88%;'><p align=left>Se um dia você encontrar ouro no solo, saiba que ele pode ter vindo de dois lugares: ou do núcleo do planeta, ou do espaço, trazido por meteoros.<Br><Br>O metal precioso que motiva a cobiça da humanidade e serve de impulso a inúmeros garimpos ilegais no Brasil é apenas uma pequenina parcela do que a Terra carrega consigo: estima-se que o ouro no núcleo do planeta seria capaz de cobrir o mundo inteiro com uma camada de 50 centímetros.<Br><Br>Cientistas alemães detectaram que parte desse grande armazenamento vem subindo à superfície terrestre, pegando carona com o magma que aparece usualmente em erupções de vulcões, afirma o portal Science Alert.<Br><Br>O novo estudo sobre rochas vulcânicas vazadas das profundezas da litosfera (camada mais superficial da crosta terrestre) revelou que metais preciosos, incluindo ouro, vazaram inicialmente do núcleo antes de iniciar a longa jornada até a superfície.<Br><Br>"<I>Quando os primeiros resultados chegaram, percebemos que tínhamos literalmente encontrado ouro</i>", afirma ao portal o geoquímico Nils Messling, da Universidade de Göttingen, na Alemanha. "Nossos dados confirmaram que material do núcleo, incluindo ouro e outros metais preciosos, está vazando para o manto terrestre."<Br><Br>Mas, se o ouro pode vir também do espaço, como saber a origem ao certo? O achado dos pesquisadores alemães toca justamente esta questão. A resposta estaria nos isótopos (variações do mesmo elemento com diferentes números de nêutrons) de um metal pesado precioso chamado rutênio.</p></div></center><BR>
<center><div style='width:96%;'><p align=left></p></div></center><BR><center><div style='width:95%;box-shadow: 3px 3px 13px 1px #555555;'><center><center><div style='width:95%;bgcolor:#999999;'><p align=left><BR><table width='100%'><tr><Td><img src=imagensx/12779.jpg width='100%'></td></tr></table><center><div style='width:95%;bgcolor:#999999;'><p align=left>Pepita<BR>Data: 08/06/2022<BR>08/06/2022</p></div></center><BR>ID: 12779</p></div></center></center></div></center><BR>OII!<table width='100%' cellspacing=0 cellpadding=0><tr><td align=center><table width='80%' cellspacing=0 cellpadding=0 height=1 bgcolor=#99999><tr><td></td></tr></table></td></tr></table><table width='100%' cellspacing=0 cellpadding=0 height=19><tr><td></td></tr></table>
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