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10d
为什么有的岩石和地球一样老,有的可能才“刚出生”?
这一系列过程,被称为“岩石循环”。 像前面提到的具有 44 亿年的锆石矿物,其所属的变质砾岩就还没有进入岩石循环的最终步骤——熔为岩浆。岩石是地球历史的见证者,每一块岩石都蕴藏 ...
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6y
中国学者揭示了深部碳循环与大地幔楔地球动力学的联系
高精度地震层析成像显示亚洲东部的地壳-地幔结构是由滞留在地幔过渡带(深达410−660km)的西太平洋俯冲板片和顶部东亚大陆岩石圈,以及夹于 ...
EurekAlert!
5y
俯冲带中地幔与地壳组分是如何相互作用的?
地球自从30亿年前就可能开始出现板块构造运动,其中俯冲作用是其核心过程,并逐步导致水圈、大气圈、生物圈等圈层的协同演化,实现着不同圈 ...
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