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首页> 外文期刊>Facies >Sedimentary facies from Upper Triassic reefal limestone of the Sambosan accretionary complex in Japan: mid-ocean patch reef development in the Panthalassa Ocean
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Sedimentary facies from Upper Triassic reefal limestone of the Sambosan accretionary complex in Japan: mid-ocean patch reef development in the Panthalassa Ocean

机译：日本Sambosan增生复合体的上三叠世礁珊瑚灰岩的沉积相：Panthalassa海洋中洋片斑礁的发育

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摘要

Microfacies of the Early to Middle Norian reefal limestone of the Sambosan Accretionary Complex (SAC) at Kamase locality, southwest Japan, are classified into seven major facies types in stratigraphic order: peloidal grainstone-packstone, unfossiliferous lime-mudstone, tubular problematica-rich wackestone, sponge-coral floatstone, sponge bafflestone, coral rudstone, and peloidal-bioclastic packstone-grainstone. The SAC records patch reef development on a mid-oceanic seamount in the Panthalassa Ocean. Because most examples of Triassic reefs come from the former Tethys, counterparts such as those from the SAC are pivotal in resolving paleogeographic issues as well as clarifying the depositional patterns between the eastern Tethys and adjacent western Pacific (Panthalassa). We also reveal that the primary stratigraphy of the reefal limestone was disrupted by submarine landslides of the seamount in an open-ocean realm during the late Middle to Late Jurassic time.
机译：日本西南部龟濑地区三宝山增生复合体（SAC）的早，中诺期礁珊瑚灰岩的微相按地层顺序分为7种主要相类型：角质粒岩-堆积石，无化石的石灰-泥岩，管状的富含问题的瓦克石，海绵珊瑚浮石，海绵挡板，珊瑚石和倍体生物碎屑堆积石-颗粒岩。 SAC记录了Panthalassa海洋中洋海山上的斑块礁发育情况。由于三叠纪珊瑚礁的大多数例子都来自前特提斯，因此，例如SAC的那些对解决古地理问题以及阐明东特提斯和相邻的西太平洋（Panthalassa）之间的沉积模式至关重要。我们还发现，在中侏罗纪晚期至晚侏罗纪晚期，一个开放海域的海山海底滑坡破坏了礁灰岩的主要地层。

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