西伯利亚西北地台舒姆宁地层泥岩（下寒武统 Botomian 和 Toyonian 阶段）中有机磷腕足类幼年瓣膜的岩石学研究（XC-1 号钻孔）

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Paleontological Journal Pub Date : 2024-04-16 DOI:10.1134/s0031030124010088

G. T. Ushatinskaya

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引用次数: 0

摘要

摘要对来自西伯利亚地台下寒武统-下元古界-下元古界Botomian-Toyonian期Shumnaya地层XC-1钻孔（1012-1013米）岩心样品中的腕足类贝壳印记进行了研究。样品为薄层沥青质泥岩。样本的基底面上有磷酸盐腕足类（菱形目和棘皮目）瓣膜的印迹和瓣膜的铸模。其中一个样本含有一簇小化石（60-220 微米），可能属于这些腕足动物的胚胎或轫瓣。化学分析显示，这些瓣膜原本的有机物质被黄铁矿取代，很可能是死后产生的。同时，成年舌腕足动物的瓣膜碎片由磷酸钙组成。

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Taphonomy of Juvenile Valves of Organophosphate Brachiopods in Mudstones of the Shumnine Formation (Botomian and Toyonian Stages, Lower Cambrian), North-Western Siberian Platform (Borehole XC-1)

Abstract

Brachiopod shell imprints from the core samples from Borehole XC-1 (1012–1013 m), Shumnaya Formation, Botomian–Toyonian stages, Lower Cambrian, Siberian Platform were examined. The samples are represented by thin laminated bituminous mudstone. Imprints of phosphate brachiopod (lingulids and acrotretids) valves and casts of valves occur on the bedding surfaces of the samples. One sample contains a cluster of small fossils (60–220 µm) probably belonging to embryos or brephic valves of these brachiopods. Chemical analysis has revealed that the originally organic material of the valves was replaced by pyrite, most likely postmortem. At the same time, the fragments of the valves of adult lingulate brachiopods are composed of calcium phosphate.

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来源期刊

Paleontological Journal 地学-古生物学

CiteScore

1.20

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Paleontological Journal (Paleontologicheskii zhurnal) is the principal Russian periodical in paleontology. The journal publishes original work on the anatomy, morphology, and taxonomy of fossil organisms, as well as their distribution, ecology, and origin. It also publishes studies on the evolution of organisms, ecosystems, and the biosphere and provides invaluable information on global biostratigraphy with an emphasis on Eastern Europe and Asia.