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首页> 外文期刊>Geodinamica Acta >Middle-Late Triassic radiolarian cherts from the Arkotda? mélange in northern Turkey: implications for the life span of the northern Neotethyan branch
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Middle-Late Triassic radiolarian cherts from the Arkotda? mélange in northern Turkey: implications for the life span of the northern Neotethyan branch

机译：来自Arkotda的中晚期三叠纪放射虫石？土耳其北部的梅朗日：对北部新特提斯扬州分行的影响

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摘要

Moderately to well-preserved, relatively diverse Middle and Late Triassic radiolarian assemblages have been obtained from the chert slide-blocks within the Late Cretaceous mélange of the IntraPontide Suture Zone at the Pelit?ren village to the NE of Kastamonu- Ara? in northern Central Anatolia. In this locality, chert slide-blocks are tectonically overlain by metamorphic sole of the serpentinized peridotites belonging to the IntraPontide ophiolites. The oldest radiolarian assemblages, with the middle Late Anisian and late Early Ladinian ages, were found in green cherts in a pebbly mudstone. They are underlain by a larger slide-block composed of an alternation of radiolarian cherts and mudstones with late Early and early Late Carnian radiolarians. Another slide-block with cherts and mudstones between the sub-ophiolitic amphibolite and the Carnian cherts includes the late Early to early Middle Norian radiolarian assemblages. These new data reveal that the IntraPontide basin was already open during the Middle to Late Triassic time and deep enough for radiolarian cherts to deposit. Moreover, it suggests that the IntraPontide Ocean is contemporaneous with a number of inferred Paleo- and Neotethyan oceanic basins in SE Europe and NW Anatolia, which were proposed in copious tectonic models.
机译：在佩利特伦（Pelit？ren）村东北至卡斯塔莫努-阿拉（Kastamonu-Ara）东北部的佩利特内缝合线带晚白垩世混杂岩中的硅质滑动块中，获得了中度至保存完好，相对多样化的中三叠世和晚期三叠纪放射虫组合。在安纳托利亚中部北部。在这个地方，石滑动块在构造上被属于IntraPontide蛇绿岩的蛇纹化橄榄岩的变质岩底覆盖。在鹅卵石状的泥岩中的绿色found石中发现了最古老的放射虫组合，具有中晚期的阿尼西时期和晚期的拉丁美洲早期时代。它们位于较大的滑块之下，该滑块由放射虫的石和泥岩与早期的晚期和晚期的晚期卡纳利的放射虫交替组成。在次蛇绿岩斜角闪石和卡氏ian石之间的另一处带有with石和泥岩的滑动块，包括早至中中期的诺里安放射虫组合。这些新数据表明，IntraPontide盆地在三叠纪中晚期已经开放，其深度足以使放射虫石沉积。此外，这表明在内部构造模型中提出了Po内大洋与东南欧和西北安纳托利亚的许多推断的古，新特提斯洋盆同时期。

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