Internal-wave and internal-tide deposits in the Cambrian Qiongzhusi Formation induced by deep-water contour currents in ponded basin, central Yunnan Province,China

doi:10.7605/gdlxb.2025.049

Journal of Palaeogeography（Chinese Edition） ›› 2025, Vol. 27 ›› Issue (5): 1173-1188. doi: 10.7605/gdlxb.2025.049

• LITHOFACIES PALAEOGEOGRAPHY AND SEDIMENTOLOGY • Previous Articles Next Articles

Internal-wave and internal-tide deposits in the Cambrian Qiongzhusi Formation induced by deep-water contour currents in ponded basin, central Yunnan Province,China

LI Xiangdong¹(), WEI Zeyi¹, WANG Dan², YANG Min¹

1 School of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
2 Office of Academic Affairs, Baise University, Guangxi Baise 533000, China

Received:2024-10-17 Revised:2024-11-26 Online:2025-10-01 Published:2025-09-30
About author:
LI Xiangdong,born in 1973,is an associate professor at the School of Land Resource Engineering of Kunming University of Science and Technology,with a Ph.D. degree obtained from the Yangtze University. He is currently engaged in research on sedimentology. E-mail: lixiangdong614@163.com.
Supported by:
Co-funded by the Science and Technology Special Project for Double First-class Construction of Kunming University of Science and Technology(202202AG050006); National Natural Science Foundation of China(41272119)

滇中地区寒武系筇竹寺组阻塞盆地深水等深流引发内波、内潮汐沉积^*

李向东¹(), 魏泽昳¹, 王丹², 杨敏¹

1 昆明理工大学国土资源工程学院, 云南昆明 650093
2 百色学院教务处, 广西百色 533000

作者简介:
李向东,男,1973年生,毕业于长江大学,获博士学位,现为昆明理工大学国土资源工程学院副教授,主要从事沉积学研究。E-mail: lixiangdong614@163.com。
基金资助:
*昆明理工大学“双一流”建设科技专项(202202AG050006); 国家自然科学基金项目(41272119)

Abstract

Abstract:

The sedimentary environment and facies of the Cambrian Terreneuvian-Qiandongian Qiongzhusi Formation in central Yunnan Province are crucial for understanding the regional stratigraphic evolution. They hold significant implications for constraining the formation of phosphate deposits in the underlying Meishucun Formation,the development of shale gas reservoirs and preservation of the Chengjiang fauna within the Qiongzhusi Formation,and the recognition of depositional environments in the overlying Canglangpu Formation. This study focuses on analyzing sedimentary structures and paleocurrent patterns from the Erjie field profile in the Jinning area,central Yunnan Province,based on detailed field observations. The findings indicate that: (1)The Qiongzhusi Formation in the Jinning area exhibits characteristics of ponded turbidity current deposits,such as repeated Bouma sequences A,recurrent parallel beddings,and relatively thick mudstone caps. (2)Contourite are ubiquitous,associated with bidirectional and unidirectional cross-bedding as well as wave-ripple lamination. (3)Paleocurrent data reveal six dominant and subdominant orientations,forming three nearly opposite pairs: 50° vs. 213°,111° vs. 292°,and 171° vs. 341°;and(4)rose diagrams of paleocurrents from individual bidirectional cross-beds display marked asymmetry. Through comprehensive analysis of sedimentary environments,paleogeography,and interactions of sedimentary flows,it is suggested that the Qiongzhusi Formation was likely deposited in a deep-water ponded basin characterized by widespread contour current deposits,as well as internal-wave and internal-tidal deposits induced by deep-water contour currents.

Key words: ponded basin, contour current deposits, internal-wave and internal-tide deposits, palaeocurrent analyses, Qiongzhusi Formation, central Yunnan Province

摘要： 滇中地区寒武系纽芬兰统至黔东统筇竹寺组的沉积环境和沉积类型在区域地层演化上具有举足轻重的作用,对于其下伏地层梅树村组磷矿的形成、本组中页岩气储集层的形成和澄江动物群的保存及上覆地层沧浪铺组的沉积环境识别均具有重要意义。本研究以滇中地区晋宁二街剖面为研究对象,在详细的野外观察基础上,着重对相关沉积构造和古水流进行了分析。结果表明: (1)在晋宁地区筇竹寺组发育有重复的鲍马序列A段、重复的平行层理及相对较厚的泥帽等阻塞浊流沉积特征; (2)等深流沉积中伴生有双向交错层理、单向交错层理及浪成波纹层理; (3)古水流方向总体上可分为6个优势方向和次优势方向,并构成50° vs. 213°、111° vs. 292°和171° vs. 341°近于相反的3组; (4)单个双向交错层理古水流玫瑰花图具有明显的不对称性。在综合分析沉积环境、古地理和沉积流体交互作用的基础上,认为筇竹寺组可能沉积于深水阻塞盆地,等深流沉积普遍发育,内波、内潮汐沉积为伴生沉积,由深水等深流引发形成。

关键词: 阻塞盆地, 等深流沉积, 内波、内潮汐沉积, 古水流分析, 筇竹寺组, 滇中地区

CLC Number:

P512.2

LI Xiangdong, WEI Zeyi, WANG Dan, YANG Min. Internal-wave and internal-tide deposits in the Cambrian Qiongzhusi Formation induced by deep-water contour currents in ponded basin, central Yunnan Province,China[J]. Journal of Palaeogeography（Chinese Edition）, 2025, 27(5): 1173-1188.

李向东, 魏泽昳, 王丹, 杨敏. 滇中地区寒武系筇竹寺组阻塞盆地深水等深流引发内波、内潮汐沉积^*[J]. 古地理学报, 2025, 27(5): 1173-1188.

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Figures/Tables 10

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测点	地层产状	层系	原始古水流产状	复原后古水流产状
1	145°∠15°	①	88°∠31°,90°∠27°,86°∠26°,85°∠25°,95°∠24°, 82°∠21°,110°∠22°,94°∠22°,84°∠22°,92°∠21°, 86°∠20°,91°∠19°,77°∠20°,71°∠17°	61°∠26°,58°∠22°,53°∠22°,51°∠21°,58°∠18°, 40°∠19°,55°∠17°,68°∠13°,43°∠20°,49°∠20°, 43°∠18°,47°∠16°,41°∠20°,31°∠20°
	145°∠15°	②	181°∠24°,186°∠24°,190°∠29°,183°∠28°, 181°∠30°,170°∠25°,156°∠20°	213°∠13°,224°∠16°,219°∠20°,215°∠19°, 206°∠19°,197°∠12°,175°∠8°
2	145°∠15°	①	192°∠9°,200°∠15°,185°∠10°,198°∠9°, 184°∠18°,160°∠17°,180°∠21°,155°∠21°	242°∠14°,235°∠21°,234°∠12°,208°∠19°, 215°∠19°,218°∠19°,219°∠6°,175°∠7°
3	148°∠10°	①	131°∠16°,122°∠20°,118°∠17°,124°∠19°,107°∠20°,121°∠20°,122°∠20°,107°∠19°,108°∠16°,112°∠19°,112°∠12°,105°∠15°,98°∠17°	118°∠7°,111°∠13°,101°∠10°,109°∠10°,82°∠14°,104°∠14°,111°∠13°,80°∠13°,71°∠15°,86°∠12°,64°∠6°,57°∠12°,66°∠13°
4	144°∠15°	①	191°∠8°,198°∠5°,210°∠8°,205°∠9°,203°∠12°, 207°∠13°,208°∠13°	291°∠11°,307°∠14°,294°∠16°,290°∠14°, 275°∠13°,260°∠15°,273°∠15°
5	154°∠11°	①	126°∠14°,130°∠10°,152°∠12°,143°∠19°,124°∠19°,126°∠8°,134°∠12°,130°∠18°,158°∠22°,170°∠20°	62°∠7°,33°∠4°,105°∠1°,130°∠8°,93°∠11°, 15°∠5°,81°∠3°,105°∠9°,164°∠12°,187°∠10°
	154°∠11°	②	178°∠21°,182°∠26°,163°∠25°,184°∠28°, 166°∠24°,160°∠29°,164°∠30°,170°∠29°, 164°∠29°,168°∠32°,132°∠27°,115°∠25°	199°∠12°,200°∠17°,167°∠14°,200°∠19°, 175°∠13°,162°∠19°,169°∠20°,178°∠19°, 169°∠18°,176°∠21°,119°∠18°,92°∠19°
6	154°∠11°	①	158°∠11°,164°∠29°,157°∠29°,168°∠29°,170°∠32°	265°∠3°,173°∠19°,162°∠18°,180°∠20°,180°∠23°
	154°∠11°	②	113°∠11°,112°∠18°,88°∠13°,122°∠22°	40°∠6°,83°∠10°,35°∠12°,101°∠12°
7	128°∠25°	①	163°∠31°,157°∠30°,155°∠34°,160°∠31°,148°∠25°	213°∠17°,209°∠14°,195°∠15°,195°∠20°,224°∠8°
	128°∠25°	②	76°∠14°,104°∠9°,110°∠9°,100°∠25°	344°∠20°,322°∠18°,315°∠16°,28°∠12°
8	117°∠23°	①	106°∠18°,118°∠16°,118°∠18°,114°∠19°,99°∠19°,90°∠21°,95°∠18°,90°∠21°,95°∠21°,102°∠18°,105°∠18°,102°∠18°,104°∠16°,104°∠11°,110°∠17°,107°∠19°,84°∠16°,78°∠14°,74°∠16°,75°∠15°,75°∠19°,83°∠18°,85°∠15°,105°∠14°,96°∠17°,109°∠19°,112°∠20°,108°∠21°	335°∠6°,297°∠5°,297°∠7°,304°∠4°,344°∠8°,3°∠10°,344.10°,3°∠10°,6°∠8°,337°∠7°,328°∠6°,337°∠7°,335°∠8°,311°∠12°,312°∠6°,333°∠6°,336°∠14°,334°∠15°,342°∠16°,340°∠16°,354°∠15°,346°∠23°,336°∠13°,323°∠6°,337°∠10°,334°∠5°,326°∠3°,338°∠4°
	117°∠23°	②	135°∠31°,136°∠34°,134°∠31°,139°∠30°,129°∠30°,125°∠31°,125°∠29°,122°∠32°,120°∠30°,121°∠27°,117°∠29°,118°∠29°,125°∠30°,124°∠22°,127°∠22°,120°∠27°	94°∠11°,169°∠13°,166°∠11°,178°∠12°,153°∠9°,144°∠9°,148°∠7°,132°∠10°,126°∠8°,144°∠4°,121°∠6°,125°∠6°,141°∠8°,180°∠3°,208°∠4°,132°∠4°

测点	地层产状	层系	原始古水流产状	复原后古水流产状
1	145°∠15°	①	88°∠31°,90°∠27°,86°∠26°,85°∠25°,95°∠24°, 82°∠21°,110°∠22°,94°∠22°,84°∠22°,92°∠21°, 86°∠20°,91°∠19°,77°∠20°,71°∠17°	61°∠26°,58°∠22°,53°∠22°,51°∠21°,58°∠18°, 40°∠19°,55°∠17°,68°∠13°,43°∠20°,49°∠20°, 43°∠18°,47°∠16°,41°∠20°,31°∠20°
	145°∠15°	②	181°∠24°,186°∠24°,190°∠29°,183°∠28°, 181°∠30°,170°∠25°,156°∠20°	213°∠13°,224°∠16°,219°∠20°,215°∠19°, 206°∠19°,197°∠12°,175°∠8°
2	145°∠15°	①	192°∠9°,200°∠15°,185°∠10°,198°∠9°, 184°∠18°,160°∠17°,180°∠21°,155°∠21°	242°∠14°,235°∠21°,234°∠12°,208°∠19°, 215°∠19°,218°∠19°,219°∠6°,175°∠7°
3	148°∠10°	①	131°∠16°,122°∠20°,118°∠17°,124°∠19°,107°∠20°,121°∠20°,122°∠20°,107°∠19°,108°∠16°,112°∠19°,112°∠12°,105°∠15°,98°∠17°	118°∠7°,111°∠13°,101°∠10°,109°∠10°,82°∠14°,104°∠14°,111°∠13°,80°∠13°,71°∠15°,86°∠12°,64°∠6°,57°∠12°,66°∠13°
4	144°∠15°	①	191°∠8°,198°∠5°,210°∠8°,205°∠9°,203°∠12°, 207°∠13°,208°∠13°	291°∠11°,307°∠14°,294°∠16°,290°∠14°, 275°∠13°,260°∠15°,273°∠15°
5	154°∠11°	①	126°∠14°,130°∠10°,152°∠12°,143°∠19°,124°∠19°,126°∠8°,134°∠12°,130°∠18°,158°∠22°,170°∠20°	62°∠7°,33°∠4°,105°∠1°,130°∠8°,93°∠11°, 15°∠5°,81°∠3°,105°∠9°,164°∠12°,187°∠10°
	154°∠11°	②	178°∠21°,182°∠26°,163°∠25°,184°∠28°, 166°∠24°,160°∠29°,164°∠30°,170°∠29°, 164°∠29°,168°∠32°,132°∠27°,115°∠25°	199°∠12°,200°∠17°,167°∠14°,200°∠19°, 175°∠13°,162°∠19°,169°∠20°,178°∠19°, 169°∠18°,176°∠21°,119°∠18°,92°∠19°
6	154°∠11°	①	158°∠11°,164°∠29°,157°∠29°,168°∠29°,170°∠32°	265°∠3°,173°∠19°,162°∠18°,180°∠20°,180°∠23°
	154°∠11°	②	113°∠11°,112°∠18°,88°∠13°,122°∠22°	40°∠6°,83°∠10°,35°∠12°,101°∠12°
7	128°∠25°	①	163°∠31°,157°∠30°,155°∠34°,160°∠31°,148°∠25°	213°∠17°,209°∠14°,195°∠15°,195°∠20°,224°∠8°
	128°∠25°	②	76°∠14°,104°∠9°,110°∠9°,100°∠25°	344°∠20°,322°∠18°,315°∠16°,28°∠12°
8	117°∠23°	①	106°∠18°,118°∠16°,118°∠18°,114°∠19°,99°∠19°,90°∠21°,95°∠18°,90°∠21°,95°∠21°,102°∠18°,105°∠18°,102°∠18°,104°∠16°,104°∠11°,110°∠17°,107°∠19°,84°∠16°,78°∠14°,74°∠16°,75°∠15°,75°∠19°,83°∠18°,85°∠15°,105°∠14°,96°∠17°,109°∠19°,112°∠20°,108°∠21°	335°∠6°,297°∠5°,297°∠7°,304°∠4°,344°∠8°,3°∠10°,344.10°,3°∠10°,6°∠8°,337°∠7°,328°∠6°,337°∠7°,335°∠8°,311°∠12°,312°∠6°,333°∠6°,336°∠14°,334°∠15°,342°∠16°,340°∠16°,354°∠15°,346°∠23°,336°∠13°,323°∠6°,337°∠10°,334°∠5°,326°∠3°,338°∠4°
	117°∠23°	②	135°∠31°,136°∠34°,134°∠31°,139°∠30°,129°∠30°,125°∠31°,125°∠29°,122°∠32°,120°∠30°,121°∠27°,117°∠29°,118°∠29°,125°∠30°,124°∠22°,127°∠22°,120°∠27°	94°∠11°,169°∠13°,166°∠11°,178°∠12°,153°∠9°,144°∠9°,148°∠7°,132°∠10°,126°∠8°,144°∠4°,121°∠6°,125°∠6°,141°∠8°,180°∠3°,208°∠4°,132°∠4°

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