四川盆地中二叠统茅一段灰岩—泥质灰岩韵律层古温度演化及驱动机制

范建平; 宋金民; 刘树根; 江青春; 李智武; 杨迪; 金鑫; 苏旺; 叶玥豪; 黄士鹏; 王佳蕊; 姜华; 罗平

doi:10.11781/sysydz202304726

四川盆地中二叠统茅一段灰岩—泥质灰岩韵律层古温度演化及驱动机制

doi: 10.11781/sysydz202304726

范建平^1,,
宋金民^1, ,,
刘树根^{1, 2},
江青春³,
李智武¹,
杨迪¹,
金鑫¹,
苏旺³,
叶玥豪¹,
黄士鹏³,
王佳蕊¹,
姜华³,
罗平^{1, 3}

1.
油气藏地质及开发工程国家重点实验室(成都理工大学)，成都 610059
2.
西华大学，成都 610039
3.
中国石油勘探开发研究院，北京 100083

基金项目:

国家自然科学基金面上项目 41872150

国家自然科学基金企业创新发展联合基金 U19B6003

详细信息

作者简介:
范建平(1997—)，男，硕士生，从事储层沉积学研究。E-mail: 272595210@qq.com

通讯作者:
宋金民(1983—)，男，博士，副教授，从事沉积储层研究。E-mail: songjinmin@sohu.com

中图分类号: TE121.3
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出版历程
- 收稿日期: 2022-12-03
- 修回日期: 2023-04-29
- 刊出日期: 2023-07-28

Paleotemperature evolution and its driving mechanism during the formation of limestone-marl alternations in first member of Middle Permian Maokou Formation in Sichuan Basin

1.
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Chengdu University of Technology), Chengdu, Sichuan 610059, China
2.
Xihua University, Chengdu, Sichuan 610039, China
3.
PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China

摘要

摘要: 发生于晚石炭世—中二叠世末期的冰期事件是显生宙史上最剧烈的冰期事件，也是地史上最后一次从冰室期到温室期的转换期。通过薄片鉴定、扫描电镜、主量元素、微量元素、碳氧同位素和锶同位素等地球化学手段，对四川盆地中二叠统茅口组一段古温度及古气候进行恢复，探讨中二叠世重大气候演变过程及驱动机制。研究结果表明，四川盆地中二叠统茅一段灰岩—泥质灰岩韵律层的生物组合类型以有孔虫、腕足和软体动物为主，不发育造礁生物和钙质绿藻；岩石结构以生物碎屑支撑和灰泥支撑为主，无鲕粒等非骨架颗粒，与国际典型的凉水碳酸盐岩类似。通过δ¹⁸O与ω(Mg)/ω(Ca)恢复古温度，灰岩沉积期的古海水温度为3.72~12.38 ℃(平均8.15 ℃，δ¹⁸O标准)，13.79~14.28 ℃(平均13.90 ℃，ω(Mg)/ω(Ca)标准)；泥质灰岩沉积期的古海水温度为7.00~14.24 ℃(平均10.97 ℃，δ¹⁸O标准)，13.82~15.41 ℃(平均14.27℃，ω(Mg)/ω(Ca)标准)。中二叠统茅一段沉积期古温度变化主要受米兰科维奇短偏心率旋回驱动，短偏心率的旋回性变化是古温度、古气候旋回变化的驱动机制。
- 灰岩—泥质灰岩韵律 /
- 凉水碳酸盐岩 /
- 古温度 /
- 茅一段 /
- 中二叠统 /
- 四川盆地
Abstract: From the Late Carboniferous to the end of Middle Permian, the most intense glacial event in history of Phanerozoic occurred and it is also the last transition period from icehouse stage to greenhouse stage in geological history. In this paper, the paleotemperature and paleoclimate in the first member of the Middle Permian Maokou Formation (Mao-1) were restored by means of thin section identification, scanning electron microscope, major elements, trace elements, carbon isotopes, oxygen isotopes and strontium isotopes, and the major climate evolution process and its driving mechanism in the Middle Permian were discussed. The results show that the biological assemblage type (mainly composed of foraminifera, brachiopods and molluscs, without reef-building organisms or calcareous green algae) and rock structure characteristics (supported by bioclastic and plaster, without oolitic or other non-skeletal particles) of the limestone-marl alternations in the Mao-1 member are similar to those of the international typical cool-water carbonate. During the limestone sedimentary period, the paleotemperature of seawater was 3.72 to 12.38 ℃ (8.15 ℃ in average, δ¹⁸O standard) or 13.79 to 14.28 ℃ (13.90 ℃ in average, ω(Mg)/ ω(Ca) standard), while during the marl sedimentary period, the paleotemperature of seawater was 7.00 to 14.24 ℃ (10.97 ℃ in average, δ¹⁸O standard) and 13.82 to 15.41 ℃ (14.27 ℃ in average, ω(Mg)/ω(Ca) standard). The paleotemperature changes in the sedimentary period of Mao-1 Member was mainly driven by the short eccentricity cycle of Milankovitch. The cyclical change of the short eccentricity was the driving mechanism of paleotemperature and paleoclimate cycle changes.
- limestone-marl alternation /
- cool-water carbonate /
- paleotemperature /
- first member of Maokou Formation /
- Middle Permian /
- Sichuan Basin
注释:

利益冲突声明/Conflict of Interests

所有作者声明不存在利益冲突。

All authors disclose no relevant conflict of interests.

作者贡献/Authors’Contributions

范建平、宋金民、刘树根、罗平参与实验设计；范建平、金鑫、王佳蕊完成实验操作；范建平、宋金民、刘树根、江青春、李智武、杨迪、苏旺、叶玥豪、黄士鹏、姜华参与论文写作和修改。所有作者均阅读并同意最终稿件的提交。

The study was designed by FAN Jianping, SONG Jinmin, LIU Shugen and LUO Ping. The experimental operation was completed by FAN Jianping, JIN Xin and WANG Jiarui. The manuscript was drafted and revised by FAN Jianping, SONG Jinmin, LIU Shugen, JIANG Qingchun, LI Zhiwu, YANG Di, SU Wang, YE Yuehao, HUANG Shipeng and JIANG Hua. All the authors have read the last version of paper and consented for submission.

HTML全文

图 1 中二叠世全球(a)及华南板块(b)古地理

据参考文献[17-18]修改。

Figure 1. Middle Permian paleogeographic map of the globe (a) and South China block (b)

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图 2 四川盆地中二叠统茅一段综合柱状图及样品位置

据参考文献[19]修改，剖面位置见图 1。

Figure 2. Stratigraphic columns and sample location of first member of Middle Permian Maokou Formation in Sichuan Basin

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图 3 四川盆地华蓥山剖面灰岩—泥质灰岩韵律层特征

a.透镜状灰岩—泥质灰岩韵律宏观特征；b透镜状灰岩—泥质灰岩韵律，平行层面观察，层面波状起伏；c.透镜状灰岩—泥质灰岩韵律，垂直层面观察，具半球状凸起；d.层状灰岩—泥质灰岩韵律宏观特征1；e.层状灰岩—泥质灰岩韵律宏观特征2；f.灰岩—泥质灰岩韵律中灰岩层与泥质灰岩层呈渐变接触关系；g.泥质灰岩，生物碎屑间被大量滑石充填具波状起伏，HY-12-3，×5，单偏光；h.泥质灰岩，生物碎屑破碎呈定向分布，HS4-97，×2.5，单偏光；i.泥质灰岩，有孔虫，HY-19-1，×5，单偏光；j.泥质灰岩，双壳，HY-6-5，×5，单偏光；k.泥质灰岩，腹足、腕足，HY-19-3，×5，单偏光；l.泥质灰岩，苔藓虫，Z8-19，×5，单偏光；m.灰岩，有孔虫，HY-15-1，×5，单偏光；n.灰岩，苔藓虫，HY-14-3，×5，单偏光；o.灰岩，腕足，HY-8-3，×5，单偏光。L.灰岩层；M.泥质灰岩层。

Figure 3. Characteristics of limestone-marl alternations in Huayingshan section, Sichuan Basin

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图 4 四川盆地华蓥山剖面灰岩—泥质灰岩韵律δ¹⁸O与δ¹³C(a)、δ¹⁸O与ω(Mn)(b)、δ¹⁸O与ω(Sr)(c)相关性分析及Mn-Sr分布(d)

Figure 4. Correlation analysis of δ¹⁸O/δ¹³C (a), δ¹⁸O/ω(Mn) (b), δ¹⁸O/ω(Sr) (c) and distribution of Mn-Sr (d) of limestone-marl alternations in Huayingshan section, Sichuan Basin

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图 5 四川盆地茅一段灰岩—泥质灰岩韵律古气候判别图版

据参考文献[30]修改。

Figure 5. Paleoclimate discrimination of limestone-marl alternations in first member of Middle Permian Maokou Formation in Sichuan Basin

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图 6 四川盆地中二叠统茅一段古温度综合剖面

Figure 6. Paleotemperature profile of first member of Middle Permian Maokou Formation in Sichuan Basin

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图 7 四川盆地中二叠统茅一段古温度与古气候指标交会图

Figure 7. Intersection of paleotemperature and paleoclimate of first member of Middle Permian Maokou Formation in Sichuan Basin

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图 8 低纬度地区罗德期δ¹⁸O、ω(Mg)/ω(Ca)、古海水温度及二氧化碳浓度曲线对比

Figure 8. Comparison of δ¹⁸O, ω(Mg)/ω(Ca), seawater paleotemperature and carbon dioxide concentration in Rhodian stage in low latitude area

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图 9 四川盆地中二叠统茅一段地球化学特征曲线与古温度曲线对比

Figure 9. Comparison of geochemical characteristic curves and paleotemperature curves of first member of Middle Permian Maokou Formation in Sichuan Basin

下载: 全尺寸图片幻灯片

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