湘中地区早特马豆克期笔石分类及分带

doi:10.19657/j.geoscience.1000-8527.2021.078

现代地质 ›› 2021, Vol. 35 ›› Issue (05): 1354-1362.DOI: 10.19657/j.geoscience.1000-8527.2021.078

湘中地区早特马豆克期笔石分类及分带

邓丽婷¹^,²^,³(), 李明³, 杨振京¹^,²(), 黄莫¹^,²^,³

1.河北地质大学地球科学学院,河北石家庄 050031
2.中国地质科学院水文地质环境地质研究所,河北正定 050800
3.自然资源部地层与古生物重点实验室,中国地质科学院地质研究所,北京 100037

收稿日期:2021-01-20 修回日期:2021-05-25 出版日期:2021-10-10 发布日期:2021-11-05
通讯作者: 杨振京
作者简介:杨振京,男,研究员,1966年出生,古生物学与地层学专业,主要从事孢粉及相关地层研究。Email: yangzhenjing@mail.cgsgov.cn。
邓丽婷,女,硕士研究生,1998年出生,古生物学与地层学专业,主要从事笔石系统学和地层学研究。Email: 15731600775@163.com。
基金资助:
中国地质科学院地质研究所基本科研业务费“柴北缘中奥陶世黑色页岩笔石地层研究”项目(J2035);中国地质调查局“蒙西、豫西、鄂西北等典型古生物群与关键地层基础地质调查”项目(DD20190008);中国地质调查局“地质云系统集成与共享服务”项目(DD20190397)

Early Tremadoc Graptolites Taxonomy and Biozonation in Central Hunan, China

DENG Liting¹^,²^,³(), LI Ming³, YANG Zhenjing¹^,²(), HUANG Mo¹^,²^,³

1. School of Earth Sciences, Hebei University of Geosciences, Shijiazhuang, Hebei 050031, China
2. Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Zhengding, Hebei 050800, China
3. Key Laboratory of Stratigraphy and Palaeontology, Ministry of Land and Resources, Institute of Geology, CAGS, Beijing 100037, China

Received:2021-01-20 Revised:2021-05-25 Online:2021-10-10 Published:2021-11-05
Contact: YANG Zhenjing

摘要/Abstract

摘要：

湖南益阳南坝是我国特马豆克阶出露最完整的地区之一。依据研究剖面特马豆克阶下部的笔石标本,参照国内外同期古生物学和地层学资料,通过对研究剖面所有笔石进行测量和数据统计,共识别出笔石3属4种,包括:Rhabdinopora flabelliforme parabola (Bulman, 1954),Adelograptus tenellus (Linnarsson, 1871),Adelograptus altus Willims & Stevens, 1991和Ancoragraptus bulmani (Spjeldnaes, 1963),并主要描述和讨论了两个带化石Rhabdinopora flabelliforme parabola (Bulman, 1954)和Adelograptus tenellus (Linnarsson, 1871)。基于笔石的系统学研究,在印渚埠组识别出Rhabdinopora flabelliformis parabola带和Adelograptus tenellus带,其中,Rhabdinopora flabelliformis parabola带是研究剖面奥陶系的最低层位,依据层内特征化石分子将Rhabdinopora flabelliformis parabola带与国内外同期地层进行了精确对比。

关键词: 分类, 分带, 笔石, 特马豆克阶, 湘中地区

Abstract:

The Nanba (Yiyang, Hunan Province) is one of the most complete areas of Tremadocian in China. According to the graptolite specimens from the lower Tremadocian in the study section and the contemporaneous paleontological and stratigraphic data at home and abroad, all graptolites in the study section were measured and statistically identified. Three genera and four species of graptolites were identified, including: Rhabdinopora flabelliforme parabola (Bulman, 1954), Adelograptus tenellus (Linnarsson, 1871), Adelograptus altus Willims & Stevens, 1991, and Ancoragraptus bulmani (Spjeldnaes, 1963), and mainly described and discussed two zone fossils, Rhabdinopora flabelliforme parabola (Bulman, 1954) and Adelograptus tenellus (Linnarsson, 1871). Based on the study of phylogeny, the Rhabdinopora flabelliforme parabola biozone and Adelograptus tenellus biozone were identified from the Yinzhubu Formation, in which, the Rhabdinopora flabelliforme parabola biozone is the lowest Ordovician strata there. Based on the key fossil in the graptolites’ zone, the Rhabdinopora flabelliforme parabola biozone is accurately compared with the coeval domestic and foreign strata.

Key words: taxonomy, biozonation, graptolite, Tremadoc, central Hunan

中图分类号:

邓丽婷, 李明, 杨振京, 黄莫. 湘中地区早特马豆克期笔石分类及分带[J]. 现代地质, 2021, 35(05): 1354-1362.

DENG Liting, LI Ming, YANG Zhenjing, HUANG Mo. Early Tremadoc Graptolites Taxonomy and Biozonation in Central Hunan, China[J]. Geoscience, 2021, 35(05): 1354-1362.

图/表 5

图1 湖南益阳水口村剖面位置图(a)和湖南益阳水口村剖面交通位置图(b)[11, 19]

Fig.1 Section location map (a) and traffic location map of Shuikou Village (Yiyang, Hunan Province, South China) (b)[11, 19]

图2 湖南益阳水口村剖面笔石生物延限岩性柱状图(据李明等[11]修改,粗横线代表笔石种产出层位,蓝竖线代表笔石种在地层中的延限)

Fig.2 Biostratigraphic and litho-stratigraphic records of graptolites(modified from Li Ming et al.[11],thick horizontal line denoting graptolite species strata, and blue vertical line denoting extension of graptolite in the strata)

图3 湖南益阳地区下奥陶统笔石 (a)Rhabdinopora flabelliformis parabola (Bulman, 1954), YYNX8, Rhabdinopora flabelliformis parabola带; (b) Rhabdinopora flabelliformis parabola (Bulman, 1954) (幼体), YYNX8; (c)(d) Adelograptus tenellus (Linnarsson, 1871), YYN1, Adelograptus tenellus带; (e) Rhabdinopora flabelliformis parabola (Bulman, 1954) (局部), YYN9, Rhabdinopora flabelliformis parabola带

Fig.3 Lower Ordovician graptolites from Yiyang (Hunan)

表1 中国主要地区特马豆克阶笔石带对比(主要依据文献[2-3,12,14,16,28,30,33,38-40,47-48,50])

Table 1 Correlation chart for Tremadoc graptolite biozones in China (after refs.[2-3,12,14,16,28,30,33,38-40,47-48,50])

表2 研究剖面与国际主要地区特马豆克阶笔石带对比(主要依据文献[15,29,33,49-51])

Table 2 Correlation chart forthe study section with Tremadoc graptolite biozones in the world (after refs.[15,29,33,49-51])

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湘中地区早特马豆克期笔石分类及分带

Early Tremadoc Graptolites Taxonomy and Biozonation in Central Hunan, China

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