川北地区下寒武统筇竹寺组钙质结核特征及成因机制

庞谦; 李凌; 胡广; 谭秀成; 马腾; 赵东方; 芦飞凡; 陈虹宇; 熊鹰

doi:10.14027/j.cnki.cjxb.2017.04.003

ISSN 1000-0550 CN 62-1038/P

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川北地区下寒武统筇竹寺组钙质结核特征及成因机制

庞谦, 李凌, 胡广, 谭秀成, 马腾, 赵东方, 芦飞凡, 陈虹宇, 熊鹰

文章导航 > 沉积学报 > 2017 > 35(4): 681-690

庞谦, 李凌, 胡广, 谭秀成, 马腾, 赵东方, 芦飞凡, 陈虹宇, 熊鹰. 川北地区下寒武统筇竹寺组钙质结核特征及成因机制[J]. 沉积学报, 2017, 35(4): 681-690. doi: 10.14027/j.cnki.cjxb.2017.04.003

引用本文:

PANG Qian, LI Ling, HU Guang, TAN XiuCheng, MA Teng, ZHAO DongFang, LU FeiFan, CHEN HongYu, XIONG Ying. Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2017, 35(4): 681-690. doi: 10.14027/j.cnki.cjxb.2017.04.003

Citation:

PANG Qian, LI Ling, HU Guang, TAN XiuCheng, MA Teng, ZHAO DongFang, LU FeiFan, CHEN HongYu, XIONG Ying. Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2017, 35(4): 681-690. doi: 10.14027/j.cnki.cjxb.2017.04.003

引用本文:

Citation:

PANG Qian, LI Ling, HU Guang, TAN XiuCheng, MA Teng, ZHAO DongFang, LU FeiFan, CHEN HongYu, XIONG Ying. Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2017, 35(4): 681-690. doi: 10.14027/j.cnki.cjxb.2017.04.003

川北地区下寒武统筇竹寺组钙质结核特征及成因机制

doi: 10.14027/j.cnki.cjxb.2017.04.003

庞谦^1,2,
李凌^1,2,,
胡广^1,2,
谭秀成^1,2,
马腾^1,2,
赵东方^1,2,
芦飞凡^1,2,
陈虹宇^1,2,
熊鹰^1,2

1.
西南石油大学地球科学与技术学院, 成都 610500;
2.
中石油碳酸盐岩储层重点实验室沉积与成藏分室西南石油大学, 成都 610500

基金项目: 中国石油科技创新基金项目计划（2016D-5007-0102）；国家科技重大专项（2016ZX05004002-001）

详细信息

作者简介:
庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者:
李凌,女,副教授,E-mail:lilinglily73@163.com

中图分类号: P534.41

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文章访问数: 594
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Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin

PANG Qian^1,2,
LI Ling^{1,2
,},
HU Guang^1,2,
TAN XiuCheng^1,2,
MA Teng^1,2,
ZHAO DongFang^1,2,
LU FeiFan^1,2,
CHEN HongYu^1,2,
XIONG Ying^1,2

1.
School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
2.
The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Petro China, Southwest Petroleum University, Chengdu 610500, China

Funds: Science and Technology Innovation Foundation of CNPC, No.2016D-5007-0102; National Science and Technology Major Project of the Ministry of Science and Technology of China, No.2016ZX05004002-001

摘要

摘要: 不同成因的钙质结核在研究沉积水体、早期成岩环境及泥页岩的压实程度方面具有重要意义。通过对川北地区旺苍县下寒武统筇竹寺组钙质结核抛光，发现结核内部具有层理、暗色圈层和张裂缝构造。结核和围岩的层理关系和具有漂浮状的微观结构特征表明，该地区结核是形成于压实作用之前的成岩早期结核。对结核中Al、Ti、Ca、K、Na元素分析表明，结核的元素分布受到结核内部裂缝的影响。结核内部富含生物碎屑和其形成深度为数十米的特征，推测结核主要是在硫酸盐还原带生长。结核具有暗色圈层之间层理不弯曲和元素移动的特征，揭示了结核为透入性生长，在整个结核生长阶段就开始大量同时结晶。Mg/Ca和Sr/Ca的比值说明，结核内部钙质成分为富镁方解石—生物成因方解石。结核中富含钙质成分的原因可能是围岩中的生物成因方解石大量向结核运移所致。裂缝的形态特征表明，裂缝为张裂缝。对结核上部地层的沉积特征研究表明，张裂缝的成因很可能与筇竹寺顶部的浊积岩和沧浪铺组底部的似瘤状灰岩快速搬运沉积有关。
- 钙质结核 /
- 裂缝 /
- 筇竹寺组 /
- 成因机制 /
- 川北地区
Abstract: Calcareous concretions of different genesis have a great significance in the study of early diagenetic environment, the sedimentary water body and shale of compacted degree. By polishing, the calcareous concretion shows the interior textures including bedding, dark circles structure and tension cracks during the lower Cambrian Qiongzhusi stage in Wangcang, north of Sichuan Basin. The relationship of concretions and surrounding rock of bedding and the preservation of sedimentological micro-features in the concretion matrix point to an early diagenetic concretions and forming before compaction. Not obvious systematic geochemical variations including Al, Ti, Ca, K, Na from concretion center to edge suggests that the element distribution of concretions are affected by cracks. The rich bioclastic and forming about tens meters under the sediment-water interface suggest the concretions may primarily grow during sulfate-reduction. The two characteristics which the beddings are not deformed among the concentric circles and the move of elements reveal that the concretions are pervasive growth which the calcium crystallites of the concretions nucleated at virtually the same time across the entire concretion. The ratios of Mg/Ca and Sr/Ca indicate that the internal calcium components of concretions is magnesium-rich calcite and biogenic calcite. The large migration of calcium in the biogenic calcite of the surrounding rock lead to the rich calcium component in the concretions. Fracture morphology shows the crack is tension cracks. The rapid transportation and deposition of turbidite at the top of Qiongzhusi Formation and analogous-nodular limestone at the bottom of Canglangpu Formation may be the cause of tension cracks.
- calcareous concretions /
- crack /
- Qiongzhusi Formation /
- genetic mechanism /
- northern Sichuan Basin

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川北地区下寒武统筇竹寺组钙质结核特征及成因机制

doi: 10.14027/j.cnki.cjxb.2017.04.003

1. 西南石油大学地球科学与技术学院, 成都 610500;

2. 中石油碳酸盐岩储层重点实验室沉积与成藏分室西南石油大学, 成都 610500

基金项目: 中国石油科技创新基金项目计划（2016D-5007-0102）；国家科技重大专项（2016ZX05004002-001）

作者简介:
庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者: 李凌,女,副教授,E-mail:lilinglily73@163.com

收稿日期: 2016-07-11
修回日期: 2016-10-24
刊出日期: 2017-08-10

中图分类号: P534.41

关键词:

裂缝 /

摘要: 不同成因的钙质结核在研究沉积水体、早期成岩环境及泥页岩的压实程度方面具有重要意义。通过对川北地区旺苍县下寒武统筇竹寺组钙质结核抛光，发现结核内部具有层理、暗色圈层和张裂缝构造。结核和围岩的层理关系和具有漂浮状的微观结构特征表明，该地区结核是形成于压实作用之前的成岩早期结核。对结核中Al、Ti、Ca、K、Na元素分析表明，结核的元素分布受到结核内部裂缝的影响。结核内部富含生物碎屑和其形成深度为数十米的特征，推测结核主要是在硫酸盐还原带生长。结核具有暗色圈层之间层理不弯曲和元素移动的特征，揭示了结核为透入性生长，在整个结核生长阶段就开始大量同时结晶。Mg/Ca和Sr/Ca的比值说明，结核内部钙质成分为富镁方解石—生物成因方解石。结核中富含钙质成分的原因可能是围岩中的生物成因方解石大量向结核运移所致。裂缝的形态特征表明，裂缝为张裂缝。对结核上部地层的沉积特征研究表明，张裂缝的成因很可能与筇竹寺顶部的浊积岩和沧浪铺组底部的似瘤状灰岩快速搬运沉积有关。

English Abstract

Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;

2. The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Petro China, Southwest Petroleum University, Chengdu 610500, China

Received Date: 2016-07-11
Rev Recd Date: 2016-10-24
Publish Date: 2017-08-10

Keywords:

Abstract: Calcareous concretions of different genesis have a great significance in the study of early diagenetic environment, the sedimentary water body and shale of compacted degree. By polishing, the calcareous concretion shows the interior textures including bedding, dark circles structure and tension cracks during the lower Cambrian Qiongzhusi stage in Wangcang, north of Sichuan Basin. The relationship of concretions and surrounding rock of bedding and the preservation of sedimentological micro-features in the concretion matrix point to an early diagenetic concretions and forming before compaction. Not obvious systematic geochemical variations including Al, Ti, Ca, K, Na from concretion center to edge suggests that the element distribution of concretions are affected by cracks. The rich bioclastic and forming about tens meters under the sediment-water interface suggest the concretions may primarily grow during sulfate-reduction. The two characteristics which the beddings are not deformed among the concentric circles and the move of elements reveal that the concretions are pervasive growth which the calcium crystallites of the concretions nucleated at virtually the same time across the entire concretion. The ratios of Mg/Ca and Sr/Ca indicate that the internal calcium components of concretions is magnesium-rich calcite and biogenic calcite. The large migration of calcium in the biogenic calcite of the surrounding rock lead to the rich calcium component in the concretions. Fracture morphology shows the crack is tension cracks. The rapid transportation and deposition of turbidite at the top of Qiongzhusi Formation and analogous-nodular limestone at the bottom of Canglangpu Formation may be the cause of tension cracks.

引用本文:

Citation:

PANG Qian, LI Ling, HU Guang, TAN XiuCheng, MA Teng, ZHAO DongFang, LU FeiFan, CHEN HongYu, XIONG Ying. Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin[J]. Acta Sedimentologica Sinica, 2017, 35(4): 681-690. doi: 10.14027/j.cnki.cjxb.2017.04.003

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川北地区下寒武统筇竹寺组钙质结核特征及成因机制

doi: 10.14027/j.cnki.cjxb.2017.04.003

作者简介:
庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者:
李凌,女,副教授,E-mail:lilinglily73@163.com

计量

Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin

计量

目录

川北地区下寒武统筇竹寺组钙质结核特征及成因机制

doi: 10.14027/j.cnki.cjxb.2017.04.003

1. 西南石油大学地球科学与技术学院, 成都 610500;

2. 中石油碳酸盐岩储层重点实验室沉积与成藏分室西南石油大学, 成都 610500

作者简介:
庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者: 李凌,女,副教授,E-mail:lilinglily73@163.com

English Abstract

Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;

2. The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Petro China, Southwest Petroleum University, Chengdu 610500, China

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川北地区下寒武统筇竹寺组钙质结核特征及成因机制

doi: 10.14027/j.cnki.cjxb.2017.04.003

作者简介: 庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者: 李凌,女,副教授,E-mail:lilinglily73@163.com

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Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin

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出版历程

目录

川北地区下寒武统筇竹寺组钙质结核特征及成因机制

doi: 10.14027/j.cnki.cjxb.2017.04.003

1. 西南石油大学地球科学与技术学院, 成都 610500; 2. 中石油碳酸盐岩储层重点实验室沉积与成藏分室 西南石油大学, 成都 610500

作者简介: 庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者: 李凌,女,副教授,E-mail:lilinglily73@163.com

English Abstract

Characteristics and Genetic Mechanism of Calcareous Concretions in the Early Cambrian Qiongzhusi Formation of Northern Sichuan Basin

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China; 2. The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Petro China, Southwest Petroleum University, Chengdu 610500, China

全文HTML

目录

友情链接

期刊在线

联系我们

作者简介:
庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

通讯作者:
李凌,女,副教授,E-mail:lilinglily73@163.com

1. 西南石油大学地球科学与技术学院, 成都 610500;

2. 中石油碳酸盐岩储层重点实验室沉积与成藏分室西南石油大学, 成都 610500

作者简介:
庞谦,男,1993年出生,硕士研究生,储层地质学,E-mail:709964864@qq.com

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;

2. The Sedimentary and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Petro China, Southwest Petroleum University, Chengdu 610500, China