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通过对西太平洋麦哲伦海山M1-1,M2-1铁锰结壳样品超微化石的分析,在Ⅱ+Ⅲ层结壳层中发现了中新世以来的超微化石种类H.carteri,C.leptoporus和G.oceanica。据此,把Ⅱ+Ⅲ层结壳归属于第3个形成期中新世-更新世发育的结壳,相当于Halbach等人提出的年青世代层。Ⅰ层内钙质超微化石的缺失可能与白垩纪末期碳酸盐补偿深度的骤然变化有关。冷的、富氧的南极底层水不仅为结壳的形成提供了良好的氧化环境,而且造成了广阔的区域性的沉积间断,从而为结壳提供了生长场所。
Based on the analysis of the ultrafine fossils of the M1-1 and M2-1 ferromanganese crusts in the Magellan seamount of the western Pacific Ocean, the species H.carteri, C since the Miocene was found in the layer Ⅱ + Ⅲ. leptoporus and G.oceanica. Accordingly, the II + III crusts belong to the third formation period of the Miocene-Pleistocene crust, which is equivalent to the younger generation proposed by Halbach et al. The absence of calcareous microfossils in layer I may be related to sudden changes in carbonate compensation depth at the end of the Cretaceous. Cold, oxygen-rich Antarctic bottom water not only provides a good oxidizing environment for the formation of crusts, but also creates extensive regional depositional discontinuities that provide a source of growth for crusts.