黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境&mdash;&mdash;来自碳酸盐岩岩相与碳、氧同位素的指示

向坤鹏; 贺永忠; 赵磊; 安亚运; 盘应娟; 何犇; 刘奎勇

doi:10.14027/j.issn.1000-0550.2018.184

ISSN 1000-0550 CN 62-1038/P

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黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

向坤鹏, 贺永忠, 赵磊, 安亚运, 盘应娟, 何犇, 刘奎勇

文章导航 > 沉积学报 > 2019 > 37(5): 957-967

向坤鹏, 贺永忠, 赵磊, 安亚运, 盘应娟, 何犇, 刘奎勇. 黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示[J]. 沉积学报, 2019, 37(5): 957-967. doi: 10.14027/j.issn.1000-0550.2018.184

引用本文:

XIANG KunPeng, HE YongZhong, ZHAO Lei, AN YaYun, PAN YingJuan, HE Ben, LIU KuiYong. The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes[J]. Acta Sedimentologica Sinica, 2019, 37(5): 957-967. doi: 10.14027/j.issn.1000-0550.2018.184

Citation:

XIANG KunPeng, HE YongZhong, ZHAO Lei, AN YaYun, PAN YingJuan, HE Ben, LIU KuiYong. The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes[J]. Acta Sedimentologica Sinica, 2019, 37(5): 957-967. doi: 10.14027/j.issn.1000-0550.2018.184

引用本文:

Citation:

XIANG KunPeng, HE YongZhong, ZHAO Lei, AN YaYun, PAN YingJuan, HE Ben, LIU KuiYong. The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes[J]. Acta Sedimentologica Sinica, 2019, 37(5): 957-967. doi: 10.14027/j.issn.1000-0550.2018.184

黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

doi: 10.14027/j.issn.1000-0550.2018.184

贵州省地质调查院, 贵阳 550081

基金项目: 贵州省地质矿产勘查开发局科研项目（QDKKH[2017]28）；贵州省科技计划项目（黔科合平台[2018]5626）；中国地质调查局项目（DD20 160020）

详细信息

作者简介:
向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

中图分类号: P588;P595

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The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes

Guizhou Geological Survey, Guiyang 550081, China

Funds: Geological Scientific Research Project of the Bureau of Geology and Mineral Exploration and Development of Guizhou Province, No. QDKKH[2017]28; Guizhou Scientifil and Technology Planning Project, No.QKHPTRC[2018]5626; China Geological Survey Project, No. DD20160020

摘要

摘要: 为详细刻画黔西南郭家湾一带中三叠世安尼期幻龙化石的埋藏环境，对所属地层坡段组进行岩相和碳、氧同位素分析。结果显示该组属于开阔台地、台地边缘礁和礁缘斜坡亚相，包含五种沉积微相类型。全岩碳氧同位素分析结果显示，δ¹⁸O_PDB值为-6.28‰~-2.11‰，平均值为-4.36‰；δ¹³C_PDB值为+0.50‰~+2.86‰，平均值为1.58‰，与黔西南及邻区同期地层碳氧同位素组成一致。获得古海水温度为16℃~20℃，盐度为125.77~131.62，指示为正常温暖的海相沉积环境。淡水的加入是导致δ¹³C_PDB和δ¹⁸O_PDB在化石层显示轻微负偏的主要原因。综合分析还原化石的埋藏活动表明：地震活动导致碳酸盐岩台地局部地层失稳，形成含大量幻龙骨骼的碎屑流最终于礁缘斜坡地带发生卸载，形成异地埋藏化石层。研究结果为进行黔西南及邻区三叠纪化石群特异埋藏分析提供资料。
- 岩相分析 /
- 碳氧同位素 /
- 安尼期 /
- 地震 /
- 郭家湾剖面
Abstract: The burial paleoenvironment of Nothosaurs during the Anisian Stage of the Poduan Formation,Guojiawan area,southwest of Guizhou province,is chacterized in detail. Analysis of carbon and oxygen isotopes in the lithofacies showed that the Poduan Formation consisted of an open platform and a platform-edge reef. The reef edge slope subfacies comprises five sedimentary microfacies types. Whole rock isotope analysis revealed a δ¹⁸O_(PDB) value of -6.28‰ to -2.11‰,averaging 4.36‰;the δ¹³C_(PDB) was +0.50‰ to +2.86‰,at an average of 1.58‰. Both values are consistent with the carbon and oxygen isotopic composition in southwestern Guizhou province and adjacent region during the Anisian Stage. The study showed that the ancient seawater temperature was 16℃ to 20℃,and the salinity was between 125.77 and 131.62,indicating a normal warm marine environment. The slight negative deviation of the δ¹³C_(PDB) and δ¹⁸O_(PDB) was caused by the mingling of fresh water with the seawater. Based on a comprehensive analysis,the following burial process of the Nothosaur is proposed. Earthquakes led to local instability of the carbonate platform,causing a debris flow. This is evident from the large number of Nothosaur bones deposited on the reef edge slope,ultimately forming the present-day fossil bed. This study provides more information for the analysis of Triassic biota in southwestern Guizhou province and adjacent areas.
- lithofacies analysis /
- carbon and oxygen isotopes /
- Anisian Stage /
- earthquake /
- Guojiawan section

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[1]	樊婷婷, 柳益群, 周鼎武, 车飞翔, 杨皓凯. 鄂尔多斯南缘长7油页岩中钙质结核成因探讨 . 沉积学报, 2023, 41(3): 932-944. doi: 10.14027/j.issn.1000-0550.2021.104
[2]	路淑毅, 杨斌, 李胜荣, 宋香锁, 杜圣贤, 高建飞, 张尚坤, 李明慧, 张伟林. 鲁西南单县盆地钻孔记录的古近纪环境变化 . 沉积学报, 2023, 41(2): 498-510. doi: 10.14027/j.issn.1000-0550.2021.090
[3]	刘作松, 易雪斐, 吉霞, 向建波. 地震触发下砂岩侵入体变形模拟实验研究 . 沉积学报, 2023, 41(5): 1530-1542. doi: 10.14027/j.issn.1000-0550.2022.113
[4]	白玛曲宗, 韦恒叶, 江增光, 邱振. 江西东岭剖面P-T界线碳同位素变化与沉积物输入的关系 . 沉积学报, 2018, 36(2): 267-279. doi: 10.14027/j.issn.1000-0550.2018.028
[5]	赵平平, 江茂生, 李任伟. 扬子地区中-晚奥陶世转折期的碳同位素漂移事件及其成因探讨 . 沉积学报, 2016, 34(6): 1021-1031. doi: 10.14027/j.cnki.cjxb.2016.06.002
[6]	孙国强, 吕婧文, 赵明君, 朱军, 吴剑锋, 陈章群, 史基安. 柴达木盆地鄂博梁Ⅲ号中新统成岩作用及沉积环境 . 沉积学报, 2015, 33(2): 337-347. doi: 10.14027/j.cnki.cjxb.2015.02.013
[7]	. 南海东北陆坡烟囱状冷泉碳酸盐岩生长剖面的碳、氧同位素特征与生长模式 . 沉积学报, 2013, 31(1): 50-55.
[8]	. 鄂尔多斯盆地下古生界石灰岩岩相及碳、氧稳定同位素特征 . 沉积学报, 2013, 31(04): 580-589.
[9]	. 贵州新民剖面晚二叠世碳同位素变化特征及有机碳埋藏的意义 . 沉积学报, 2012, 30(5): 806-816.
[10]	杨丽丽. 黔南宾夕法尼亚亚纪珊瑚礁相腕足动物氧同位素组成及其古水温信息 . 沉积学报, 2011, 29(3): 458-464.
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[20]	钱建兴. 南中国海8KL岩芯氧同位素第6期以来的氧、碳稳定同位素记录与堆积速率研究 . 沉积学报, 1994, 12(3): 21-28.

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黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

doi: 10.14027/j.issn.1000-0550.2018.184

贵州省地质调查院, 贵阳 550081

基金项目: 贵州省地质矿产勘查开发局科研项目（QDKKH[2017]28）；贵州省科技计划项目（黔科合平台[2018]5626）；中国地质调查局项目（DD20 160020）

作者简介:
向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

收稿日期: 2018-09-13
修回日期: 2018-11-26
刊出日期: 2019-10-10

中图分类号: P588;P595

关键词:

岩相分析 /

碳氧同位素 /

安尼期 /

地震 /

郭家湾剖面

摘要: 为详细刻画黔西南郭家湾一带中三叠世安尼期幻龙化石的埋藏环境，对所属地层坡段组进行岩相和碳、氧同位素分析。结果显示该组属于开阔台地、台地边缘礁和礁缘斜坡亚相，包含五种沉积微相类型。全岩碳氧同位素分析结果显示，δ¹⁸O_PDB值为-6.28‰~-2.11‰，平均值为-4.36‰；δ¹³C_PDB值为+0.50‰~+2.86‰，平均值为1.58‰，与黔西南及邻区同期地层碳氧同位素组成一致。获得古海水温度为16℃~20℃，盐度为125.77~131.62，指示为正常温暖的海相沉积环境。淡水的加入是导致δ¹³C_PDB和δ¹⁸O_PDB在化石层显示轻微负偏的主要原因。综合分析还原化石的埋藏活动表明：地震活动导致碳酸盐岩台地局部地层失稳，形成含大量幻龙骨骼的碎屑流最终于礁缘斜坡地带发生卸载，形成异地埋藏化石层。研究结果为进行黔西南及邻区三叠纪化石群特异埋藏分析提供资料。

English Abstract

The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes

Guizhou Geological Survey, Guiyang 550081, China

Received Date: 2018-09-13
Rev Recd Date: 2018-11-26
Publish Date: 2019-10-10

Keywords:

Abstract: The burial paleoenvironment of Nothosaurs during the Anisian Stage of the Poduan Formation,Guojiawan area,southwest of Guizhou province,is chacterized in detail. Analysis of carbon and oxygen isotopes in the lithofacies showed that the Poduan Formation consisted of an open platform and a platform-edge reef. The reef edge slope subfacies comprises five sedimentary microfacies types. Whole rock isotope analysis revealed a δ¹⁸O_(PDB) value of -6.28‰ to -2.11‰,averaging 4.36‰;the δ¹³C_(PDB) was +0.50‰ to +2.86‰,at an average of 1.58‰. Both values are consistent with the carbon and oxygen isotopic composition in southwestern Guizhou province and adjacent region during the Anisian Stage. The study showed that the ancient seawater temperature was 16℃ to 20℃,and the salinity was between 125.77 and 131.62,indicating a normal warm marine environment. The slight negative deviation of the δ¹³C_(PDB) and δ¹⁸O_(PDB) was caused by the mingling of fresh water with the seawater. Based on a comprehensive analysis,the following burial process of the Nothosaur is proposed. Earthquakes led to local instability of the carbonate platform,causing a debris flow. This is evident from the large number of Nothosaur bones deposited on the reef edge slope,ultimately forming the present-day fossil bed. This study provides more information for the analysis of Triassic biota in southwestern Guizhou province and adjacent areas.

引用本文:

Citation:

XIANG KunPeng, HE YongZhong, ZHAO Lei, AN YaYun, PAN YingJuan, HE Ben, LIU KuiYong. The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes[J]. Acta Sedimentologica Sinica, 2019, 37(5): 957-967. doi: 10.14027/j.issn.1000-0550.2018.184

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黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

doi: 10.14027/j.issn.1000-0550.2018.184

作者简介:
向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

计量

The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes

计量

目录

黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

doi: 10.14027/j.issn.1000-0550.2018.184

贵州省地质调查院, 贵阳 550081

作者简介:
向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

English Abstract

The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes

Guizhou Geological Survey, Guiyang 550081, China

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黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

doi: 10.14027/j.issn.1000-0550.2018.184

作者简介: 向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

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The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes

计量

出版历程

目录

黔西南郭家湾地区中三叠世坡段组幻龙化石埋藏环境——来自碳酸盐岩岩相与碳、氧同位素的指示

doi: 10.14027/j.issn.1000-0550.2018.184

贵州省地质调查院, 贵阳 550081

作者简介: 向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

English Abstract

The Burial Environment of Nothosaurs in the Middle Triassic Pod-uan Formation,Guojiawan,Southwest of Guizhou: Implications from carbonate lithofacies and carbon and oxygen isotopes

Guizhou Geological Survey, Guiyang 550081, China

全文HTML

目录

友情链接

期刊在线

联系我们

作者简介:
向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com

作者简介:
向坤鹏,男,1988年出生,博士,高级工程师,区域地质,E-mail:xiangkp1988@163.com