地质历史时期海平面变化曲线的数学模型

赵玉光; 刘宝珺; 许效松

地质历史时期海平面变化曲线的数学模型

1.
西南交通大学土木工程学院, 成都 610031
2.
成都地质矿产研究所, 成都 610082

基金项目: 四川省跨世纪杰出青年学术带头人培养基金

详细信息

作者简介:
赵玉光, 男, 教授, 1963年生, 1990年毕业于中国地质大学（北京）, 获硕士学位, 主要从事地质学、工程地质学、防灾减灾、地下工程与岩土工程等教学和科研工作

中图分类号: P539.2; P628⁺.3
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- 被引次数: 0
出版历程
- 收稿日期: 1999-07-12
- 刊出日期: 2000-03-25

MATHEMATICAL MODEL OF SEA-LEVEL CHANGE CURVES IN GEOLOGICAL HISTORY

1.
Building College, Southwest Jiaotong University, Chengdu 610031, China
2.
Chengdu Institute of Geology and Mineral Resources, Chengdu 610082, China

摘要

摘要: 地层层序是古海平面变化的信息记录载体, 有效容纳空间(C(t))是地层层序的堆积场所, 是海平面变化(L(t))、构造沉降(Y(t)) 和地质时间(t) 的函数.通过对上扬子地台西缘二叠—三叠系层序地层学研究, 在总结前人海平面变化曲线研究方法的基础上, 建立了海平面变化曲线的数学模型(数学地质模型和数学函数模型), 即首先创立海平面变化曲线的数学地质模型: C(t) =L(t)+Y(), 进而提出了海平面变化曲线的数学函数模型.运用该模型定量编制了上扬子地台西缘二叠—三叠纪海平面变化曲线.
- 海平面变化曲线 /
- 构造沉降 /
- 有效容纳空间 /
- 数学模型
Abstract: The stratigraphical sequences are considered as a medium to record sea-level changes. The effective accommodation space (C(t)), an accumulation strata for stratigraphic sequences, is a function of sea-level changes (L(t)), tectonic subsidence (Y(t)) and geological time (t). The research into the Permian-Triassic sequence stratigraphy in the western margin of the Upper Yangtze block, and the summary of previous research methods for the sea-level change curves both have been employed to establish the mathematical model of sea-level change curves, including mathematical geological model and mathematical function model. Firstly, the mathematical geological model of sea-level change curves: C(t)=L(t)+Y(t) is established, then the mathematical function model is proposed. The mathematical model has been used to compile quantitatively the Permian-Triassic seal-level change curves on the western margin of the Upper Yangtze block.
- sealevel change curve /
- tectonic subsidence /
- effective accommodation space /
- mathematical model

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图 1 上扬子地区及其西缘三叠纪构造格架及剖面点泥盆纪至三叠纪构造沉降的时空分布

Fig. 1. Triassic tectonic framework and space and time comparison of tectonic subsidence from Devonian to Triassic in different facies zones in the Upper Yangtze craton

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图 2 四川广元上寺晚古生代构造沉降曲线模型与二叠—三叠纪海平面变化绝对值曲线的重建

Fig. 2. Tectonic subsidence curve of Late Paleozoic and reconstruction of absolute value curve of sea＿level changes during the Permian and Triassic in Shangsi, Guangyuan County, Sichuan Province

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图 3 四川广元上寺和峨嵋山龙门洞二叠—三叠纪海平面升降曲线重建与Haq曲线的比较

Fig. 3. Reconstruction of sea-level rising and falling curves during the Permian and Triassic in Shangsi, Guangyuan and Long-mendong, Emeishan, Sichuan and comparison with Haq curve

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参考文献(5)

[1]	Hardenbol J, Vail P R, Ferrer J. Interpreting environments, subsidence history and sea-level changes on passive margins from seismic biostratigraphy[A]. In: Abstract of 26th Int Geol Congr, Geology of Continental Margins[C]. Oceanal Acta, 1981, Suppl4: 33~44.
[2]	Vail P R. Seismic stratigraphy interpretation using sequence stratigraphy. Part 1: seismic stratigraphy interpretation procedure[A]. In: Balley A W, ed. Atlas of seismic stratigraphy[C]. AAPG, 1987, 27: 1~10.
[3]	Bond G C, Kominiz M A. Construction of tectonic subsidence curves for the early Paleozoic miogeocline, southern Canadian Rocky Mountains: implication for subsidence mechanisms, age of breakup, and crustal thinning[J]. GSAB, 1984, 95: 155~173.
[4]	Jervey M T. Quantitative geological modelling of siliciclastic rock sequence and their seismic expressions[A]. In: Wilgus C K, Hastings B, Ross C, et al, eds. Sea level changes: an integrated approach[C]. Society of Economic Paleontologists and Mineralogist Special Publication, 1988, 42: 47~69.
[5]	Cisne J L, Gilder R F, Rabe B D. Eperic sedimentation and sea level: synthetic ecostratigraphy[J]. Lethaia, 1984, 17: 267~288.