Crinoids lived around the Cretaceous seeps: the second example from cold-seep deposit in the Yezo Group in Hokkaido, Japan
Crinoids lived around the Cretaceous seeps: the second example from cold-seep deposit in the Yezo Group in Hokkaido, Japan
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海百合生活在白垩纪渗水周围：来自日本北海道虾夷群冷渗矿床的第二个例子
DOI：
10.11646/zoosymposia.15.1.10
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
KATO MOE
中科院分区：
文献类型：
--
作者：
Aoki Katsuki;De Felice Antonio;Mukohyama Shinji;Noui Karim;Oliosi Michele;C. Pookkillath Masroor;馬場俊介;KATO MOE
冷泉矿床的特点是具有非常低 δ 13 C 特征的自生碳酸盐和化学合成群落成员的特定化石。这些成员主要由软体动物组成，而仅报道了少数来自冷泉沉积物的棘皮动物化石。冷泉环境中或附近的棘皮动物化石的古生态学信息也是零星的。在北海道北部虾夷群的白垩纪冷泉碳酸盐巨石中发现了海百合物种的异地柱状化石。海百合化石样本的稳定碳同位素显示出非常低的值，大约−30‰（VPDB）或更低的值。渗水海百合的低 δ 13 C 特征及其发生模式表明，海百合化石生活在渗水环境附近，并且它们同化了从那里转移的低 δ 13 C 有机颗粒。
Cold seep deposits are characterized by authigenic carbonates with very low δ 13 C signatures and specific fossils of chemosynthetic community members. These members are mainly composed of mollusks, whereas only a few occurrences of fossil echinoderms from cold seep deposits have been reported. The information of paleoecology of fossil echinoderms in or near cold seep environments is also sporadic. Allochthonous columnal fossils of an Isocrinina crinoid species were found in a boulder of Cretaceous cold seep carbonate from the Yezo Group in northern Hokkaido. The stable carbon isotope of the fossil crinoid specimens showed very low values, approximately− 30‰(VPDB) or much lower value. The low δ 13 C signatures of the seep crinoids and their mode of occurrences suggest that the fossil crinoids lived near the seep environment, and they assimilated low δ 13 C organic particles shifted from there.