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首页> 外文OA文献 >Lithofacies, paleoenvironments and sequence stratigraphy of the Late Oligocene Aotea Formation (Te Kuiti Group), central-western North Island, New Zealand
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Lithofacies, paleoenvironments and sequence stratigraphy of the Late Oligocene Aotea Formation (Te Kuiti Group), central-western North Island, New Zealand

机译：新西兰北岛中西部的晚渐新世奥特亚组（Te Kuiti集团）的岩相，古环境和层序地层

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摘要

This report presents a comprehensive facies and sequence stratigraphic analysis of the Late Oligocene Aotea Formation within the Late Eocene – Earliest Miocene Te Kuiti Group in the Waikato-King Country Basin in central-western North Island, New Zealand. The Aotea Formation is a mixed carbonate-siliciclastic succession with four facies associations: limestone (Waimai Limestone Member), calcareous sandstone (Hauturu Sandstone Member, Kihi Sandstone Member), calcareous siltstone (Patikirau Siltstone Member) and chemogenic facies (upper parts of Kihi Sandstone Member, Patikirau Siltstone Member and Waimai Limestone Member). Theses facies are established from field descriptions supplemented by laboratory textural and petrographic data and are inferred to have accumulated in different sectors of a shelf environment. The Aotea Formation comprises one sequence for which key surfaces and systems tracts are described and interpreted. The lower sequence boundary is a wave-planed surface. It, together with the subsequent onlap deposits represent a marked basinward shift in the position of coastal onlap arising from basin inversion focussed along the western margin of the basin, followed by marked subsidence in the northern part of the basin.
机译：本报告提供了新西兰北岛中西部怀卡托-金国家盆地晚始新世-最早的中新世Te Kuiti组内晚渐新世奥特亚组的综合相和层序地层分析。 Aotea组是碳酸盐-硅质碎屑混合演替的，具有四个相的组合：石灰岩（Waimai石灰岩成员），钙质砂岩（Hauturu砂岩成员，Kihi砂岩成员），钙质粉砂岩（Patikirau粉砂岩成员）和化成相（Kihi砂岩上部）会员，Patikirau粉砂岩会员和Waimai石灰石会员）。这些相由野外描述建立，再加上实验室的纹理和岩石学数据，据推断已积累在架子环境的不同区域。 Aotea地层包括描述和解释关键地表和系统道的一个序列。序列下界是波状表面。它与随后的上覆沉积物一起反映了沿海上覆位置的显着盆地向偏移，这是由于盆地倒置集中在盆地西部边缘引起的，随后在盆地北部显着沉降。

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