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Three scoria blocks from Māori occupation sites, New Zealand: Their petrography, mineralogy, geochemistry and attribution to a source locality in eastern Polynesia
Geoarchaeology ( IF 1.4 ) Pub Date : 2021-02-28 , DOI: 10.1002/gea.21843 William R. H. Ramsay 1 , Graeme S. Collett 2 , Elizabeth G. Ramsay 3 , Georgia Kerby 4
Geoarchaeology ( IF 1.4 ) Pub Date : 2021-02-28 , DOI: 10.1002/gea.21843 William R. H. Ramsay 1 , Graeme S. Collett 2 , Elizabeth G. Ramsay 3 , Georgia Kerby 4
Affiliation
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We document the petrography, mineralogy, major, minor, trace elements, and isotopic signatures of three shaped scoria blocks found within or associated with Māori occupation sites in southern New Zealand. Both mineralogy and geochemistry show that these scoria blocks have close affinities to alkaline lavas characteristic of intraplate, volcanic oceanic islands. Comparisons are made with broadly similar young alkaline associations on the mainland and off‐shore islands of New Zealand and it is shown that all three blocks are exotic. A number of young, east Pacific Islands are investigated and it is demonstrated that the closest comparison is with lavas from the Society Islands, French Polynesia. Geochemically it is difficult to identify which island in that group was the source but, predicated on the youthful appearance of these scoria blocks; it is suggested that the most likely location is the volcanically young island of Mehetia. This island is the location of a recent Strombolian pyroclastic event and scoria is a common rock associate of that island. These scoria blocks are the first pre‐European artefacts with secure archaeological contexts found in New Zealand, whose origins can reliably be traced to their source island group in the eastern Pacific.
中文翻译：
来自新西兰毛利人占领点的三个矿渣岩块：岩相学，矿物学，地球化学和归属于波利尼西亚东部的来源地
我们记录了在新西兰南部毛利人占领区发现的或与之相关的三个异型鳞屑岩的岩石学，矿物学，主要，次要，微量元素和同位素特征。矿物学和地球化学都表明，这些火山灰岩块与板内火山岛的碱性熔岩具有密切的亲和力。比较了新西兰大陆和离岸岛屿上与年轻碱性化合物大致相似的结果，结果表明这三个区块都是异国情调的。对许多年轻的东太平洋群岛进行了调查，结果表明，与法属波利尼西亚社会群岛的熔岩最接近的比较是。从地球化学上讲，很难确定该组中的哪个岛是来源，但要根据这些火山灰岩块的年轻外观来确定。建议最可能的位置是梅赫蒂亚火山年轻的岛屿。该岛是最近发生的斯特伦伯利亚火山碎屑事件的所在地，而火山灰是该岛的常见岩石伴生。这些火山灰岩块是在新西兰发现的第一批具有可靠考古背景的前欧洲文物，其起源可以可靠地追溯到其东太平洋的原始岛群。
更新日期：2021-04-08
中文翻译：
来自新西兰毛利人占领点的三个矿渣岩块：岩相学，矿物学，地球化学和归属于波利尼西亚东部的来源地
我们记录了在新西兰南部毛利人占领区发现的或与之相关的三个异型鳞屑岩的岩石学，矿物学，主要，次要，微量元素和同位素特征。矿物学和地球化学都表明，这些火山灰岩块与板内火山岛的碱性熔岩具有密切的亲和力。比较了新西兰大陆和离岸岛屿上与年轻碱性化合物大致相似的结果，结果表明这三个区块都是异国情调的。对许多年轻的东太平洋群岛进行了调查，结果表明，与法属波利尼西亚社会群岛的熔岩最接近的比较是。从地球化学上讲，很难确定该组中的哪个岛是来源，但要根据这些火山灰岩块的年轻外观来确定。建议最可能的位置是梅赫蒂亚火山年轻的岛屿。该岛是最近发生的斯特伦伯利亚火山碎屑事件的所在地，而火山灰是该岛的常见岩石伴生。这些火山灰岩块是在新西兰发现的第一批具有可靠考古背景的前欧洲文物，其起源可以可靠地追溯到其东太平洋的原始岛群。
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