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首页> 外文期刊>Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences >Taphonomy of ghost shrimps (Decapoda: Axiidea: Callianassidae) associated with their burrows within a middle Miocene mud volcano complex of Persian (Arabian) Gulf, Kuwait
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Taphonomy of ghost shrimps (Decapoda: Axiidea: Callianassidae) associated with their burrows within a middle Miocene mud volcano complex of Persian (Arabian) Gulf, Kuwait

机译：鬼魂虾（Decapoda：Axiidea：Callianassidae）与他们的波斯（阿拉伯）海湾，科威特的中间内部泥港复合体相关联

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摘要

Shallow-marine strata of the Ghar Formation exposed along the Kuwait arch in the north of Kuwait contains fields of mud volcanoes associated with an assemblage dominated by pectinid bivalves and callianassid ghost shrimps. The depositional palaeoenvironment is interpreted to be intertidal to subtidal with the water depth not exceeding 50 m and with normal to hypersaline conditions. Based on the microfossil assemblage a middle Miocene age (early Langhian) is inferred, suggesting a longer stratigraphic span of the formation despite the previous studies treating the Ghar Formation as strictly early Miocene. Callianassid body fossils and numerous trace fossils assignable to Ophiomorpha have been identified. Ghost shrimp remains consisting of isolated cheliped elements are assigned to Neocallichirus (s.l.), which is the likely producer of Ophiomorpha burrows as documented by cheliped elements present within burrows and in the substrate around them. Stable isotopes discrimination modelling confirmed that fluids in the substrate were derived from at least two sources implying the presence of active mud volcanoes in the environment inhabited by ghost shrimps. Effusive activity of mud volcanoes further enhanced disarticulation and fragmentation of callianassid remains. The micritic matrix of ghost shrimp exoskeletons is indicated to have resulted from a mixture of local seawater with fluid of continental origin. This ghost shrimp occurrence is the first formal report of fossil decapod crustaceans from Kuwait.
机译：沿科威特北部的科威特拱门暴露的云层的浅海洋地层含有与由果皮双枝和Callianasid幽灵虾为主的组合相关的泥火山的田间。沉积的猴年环境被解释为透氧到对阴性的阴影，水深不超过50μm，并且正常到过氧碱条件。基于Microfossil组合的中间内肾上腺年龄（兰氏早期）被推断出来，尽管先前的研究表明形成了较长的研究，但是将GHAR形成作为严格早期的中生的研究。已经确定了Callianasisid体化石和可分配给Ophiomorpha的众多微量化石。幽灵虾仍然由分离的螯合元素组成，被分配给新ocallichirus（S.1.），这是由挖掘机内和周围的基材中存在的螯合元素记录的Ophiomorpha挖掘的可能生产者。稳定的同位素辨别建模证实，底物中的流体源自至少两个来源，这意味着在鬼魂虾栖息的环境中存在活性泥火山的存在。泥火山的散热活动进一步增强了禁止蛋白酶的缺陷和碎片。鬼虾外骨骼的微菌基质被指示由局部海水的混合物与大陆源的混合物引起。这种幽灵虾发生是来自科威特Fossil Decapod甲壳类动物的第一个正式报告。

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