豫北林州地区鼓山阶底部碳同位素组成及演化趋势

陈泳霖; 王玺; 王艳慧; 姚帅; 白国典; 方怀宾

doi:10.19509/j.cnki.dzkq.2022.0196

豫北林州地区鼓山阶底部碳同位素组成及演化趋势

doi: 10.19509/j.cnki.dzkq.2022.0196

陈泳霖^{1, 2,},
王玺¹,
王艳慧¹,
姚帅¹,
白国典¹,
方怀宾¹

1.
河南省地质调查院，郑州 450001
2.
河南省金属矿产成矿地质过程与资源利用重点实验室, 郑州 450001

基金项目:

河南省自然科学基金项目 202300410024

河南省地质调查院科技创新基金项目豫科创[2021]KC-01

详细信息

作者简介:
陈泳霖(1988—)，男，工程师，主要从事古生物学与地层学研究工作。E-mail: 153354533@qq.com

中图分类号: P597
计量
- 文章访问数: 815
- PDF下载量: 38
- 被引次数: 0
出版历程
- 收稿日期: 2022-03-08
- 网络出版日期: 2022-11-10

Carbon isotope composition and its evolution around the base of the Drumian Stage in Linzhou area, northern Henan

1.
Henan Institute of Geological Survey, Zhengzhou 450001, China
2.
Key Laboratory of Metallogenic Geological Process and Resource Utilization of Metal Mineral Resources of Henan Province, Zhengzhou 450001, China

摘要

摘要:
碳同位素地层学是寒武系地层划分与对比的重要手段。通过对豫北驴驮沟剖面碳酸盐岩地层进行碳同位素分析发现，驴驮沟剖面寒武系鼓山阶(Drumian)底界附近的碳酸盐岩的δ¹³C值分布于3.1‰~-1.7‰之间，δ¹⁸O值分布于-3.9‰~-9.4‰之间。δ¹³C、δ¹⁸O之前的非协变关系指示碳同位素组成比较稳定。鼓山阶底界附近δ¹³C表现为负漂移演化趋势，漂移幅度为3.0‰，最低值为-1.7‰，出现在三叶虫Proasaphiscus首现位置15 m之下。出现负漂移的位置和负漂移的幅度与华南湘西王村剖面、美国犹他州Drum Mountains等剖面的鼓山阶底部的负漂Drum carbon isotope excursion(DICE)一致，表明DICE负漂移具有洲际对比意义，可作为寒武系鼓山阶划分和对比的工具。负漂移峰值处岩性为位于青灰色页岩之间的薄层灰岩夹层，超覆于鲕粒灰岩之上，因此，寒武系鼓山阶底部附近的DICE负漂移对应于苗岭世早期的海侵时期。
- 碳同位素组成 /
- DICE负漂移 /
- 鼓山阶 /
- 寒武系
Abstract:
Carbon isotope stratigraphy is an important means to subdivide and correlate the Cambrian strata. Based on the carbon isotope analysis of the carbonate strata of Lütuogou Section, northern Henan Province, it is found theδ¹³C value of carbonate samples collected from the base of the Drumian Stage at Lütuogou Section, northern Henan, ranges from 3.1‰ to -1.7‰, and theδ¹⁸O value ranges from -3.9‰ to -9.4‰. No covariance exists betweenδ¹³C andδ¹⁸O, which implies that the carbon isotope composition is nearly stable. Value ofδ¹³C around the base of the Drumian Stage consists of a negative excursion, the amplitude of the negative excursion is 3.0‰, and the minimum value ofδ¹³C is -1.7‰, which occurs at the place 15 m below the first occurrence of trilobite protasaphiscus. The position and amplitude of the negative excursion are similar to those of the drum carbon isotope excursion (DICE) tested in the Wangcun Section, western Hunan, South China, and the Drum Mountains section in Utah, USA, which suggests that the DICE can be used as a global indicator for the correlation of the Drumian Stage. Furthermore, the cyan shale with thin limestone at the position of minimumδ¹³C overlies the oolitic limestone; therefore, DICE occurs in the transgressive succession in the early Miaolingian.
- carbon isotope composition /
- DICE negative excursion /
- Drumian Stage /
- Cambrian

HTML全文

图 1 剖面位置及苗岭世区域古地理图^[15]

Figure 1. Location of section and reginal paleogeographical map during Miaolingian

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图 2 工作区地质简图

Figure 2. Generalized geological map of the working

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图 3 林州地区张夏组岩性特征

a.叠层石灰岩；b.张夏组底部灰黄色薄板状泥晶灰岩夹粉砂质泥岩；c.张夏组上部软沉积变形构造；d.浅灰色砂屑灰岩中的交错层理；e.鲕粒灰岩外貌；f.鲕粒灰岩镜下特征；g.藻灰岩；h.重结晶鲕粒灰岩；i.含生物碎屑砾屑灰岩

Figure 3. Lithology characteristics of the Zhangxia Formation in Linzhou area

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图 4 驴驮沟剖面δ¹³C与δ¹⁸O之间的相关性

Figure 4. Correlativity between δ¹³C and δ¹⁸O from Lütuogou section

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图 5 驴驮沟剖面寒武系鼓山阶底界附近碳同位素组成演化趋势

Figure 5. Evolution trend of carbon isotope composition around the base of Cambrian Drumian Stage in Lütuogou section

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图 6 驴驮沟剖面寒武系鼓山阶底界碳同位素演化曲线与世界其他地区对比

Figure 6. Comparison of carbon isotope evolution curves around the base of Cambrian Drumian Stage in Lütuogou section and other regions of the world

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图 7 鼓山阶底部层序地层与化学地层对比

1.泥质白云岩；2.泥质条带灰岩；3.鲕粒灰岩；4.泥岩；5.页岩；6.平行层理；7.水平层理；8.主要硬底；9.层序边界；10.向上变深趋势

Figure 7. Correlation of sequence stratigraphy and chemostratigraphy around the base of Drumian Stage

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表 1 华北中寒武统与国际寒武系苗岭统地层对比^[19-20]

Table 1. Stratigraphic correlation between the Middle Cambrian in North China and the international Cambrian Miaolingian

国际寒武系			华北寒武系
统	阶	三叶虫带	三叶虫带	阶	统
苗岭统			Damesellaparonai	张夏阶	中寒武统
	鼓山阶	Lejopyge armata	Damesellaparonai
			Liaopeishania
			Taitzuia-Poshania
		Goniagnostus nathorsti	Amphoton
		Ptychagnostus punctuosus	Crepicephalina
		Ptychagnostus punctuosus	Megagraulos
		Ptychagnostus atavus	Inouyella-Peishania
	乌溜阶	Ptychagnostus gibbus	Bailiella-Lioparia Poriagroulos Inouyops Metagraulos Sunaspis-Sunaspidella Sinopagetia jinnanensis Ruichengaspis Asteromajia hsuchuangensis	徐庄阶
		Peronopsis taijiangensis
		Oryctocephalus indicus

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表 2 驴驮沟剖面碳酸盐岩碳氧同位素分析结果

Table 2. Carbon and oxygen isotope analysis results of carbonate rock in Lütuogou section

样品编号	δ¹³C_VPBD/‰	δ¹⁸O_VPBD/‰	距底位置/m	岩性
LZ043	0.7	-4.4	400.6	砂屑砾屑灰岩
LZ042	0.5	-5.9	392.1	叠层石灰岩
LZ041	0.4	-5.7	388.8	鲕粒灰岩
LZ040	1.3	-3.3	383.3	白云质灰岩
LZ039	1.3	-2.6	367.3	灰质白云岩
LZ038	0.2	-8.8	366.3	叠层石白云岩
LZ037	0.5	-7.0	363.7	鲕粒砂屑灰岩
LZ036	0.7	-7.6	361.6	鲕粒灰岩
LZ035	0.5	-7.9	358.4	白云质灰岩
LZ034	1.9	-3.3	352.1	白云质灰岩
LZ033	1.3	-3.9	340.8	砂屑灰岩
LZ032	0.3	-4.8	333.7	灰质白云岩
LZ031	0.2	-5.5	330.9	含鲕粒灰岩
LZ030	1.3	-8.1	329.0	鲕粒灰岩
LZ029	1.1	-8.0	319.5	鲕粒砂屑灰岩
LZ028	-0.5	-5.9	313.7	豆粒灰岩
LZ027	0.6	-8.0	313.0	砂屑灰岩
LZ026	0.3	-7.4	293.6	鲕粒灰岩
LZ025	0.1	-5.2	273.1	鲕粒灰岩
LZ024	0.3	-5.4	268.0	豆粒灰岩
LZ023	0.3	-5.1	249.3	藻灰岩
LZ022	-0.1	-8.1	246.8	鲕粒灰岩
LZ021	0.6	-4.9	241.8	竹叶状灰岩
LZ020	0.6	-5.4	230.4	砂屑颗粒灰岩
LZ019	0.9	-5.4	226.6	云斑状灰岩
LZ018	1.5	-6.7	221.8	砂屑颗粒灰岩
LZ017	1.6	-3.9	220.2	灰质白云岩
LZ016	2.7	-5.0	218.1	白云质灰岩
LZ015	2.8	-4.6	216.7	砂屑灰岩
LZ014	2.8	-5.8	215.7	豹皮灰岩
LZ013	2.2	-6.5	214.7	白云质灰岩
LZ012	3.1	-9.1	199.3	砂屑灰岩
LZ011	1.9	-9.1	189.8	细晶灰岩
LZ010	1.7	-5.4	183.1	薄板灰岩
LZ009	1.6	-5.3	181.6	薄板灰岩
LZ008	0.5	-4.6	171.7	薄层灰岩
LZ007	-0.9	-4.9	170.7	生物碎屑灰岩
LZ006	-1.7	-6.6	163.8	砂屑灰岩
LZ005	-0.1	-9.4	156.4	鲕粒灰岩
LZ004	0.3	-6.3	149.5	鲕粒灰岩
LZ003	-0.7	-7.0	125.0	鲕粒灰岩
LZ002	-0.2	-11.8	109.8	泥晶白云岩
LZ001	1.3	-6.5	97.8	鲕粒灰岩

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