Geochemical characteristics and paleoenvironmental implications of carbonate rocks at the Givertian and Eifelian boundary in northeast Guangxi

LIU Shijie; GUAN Qi; PAN Ming

doi:10.11932/karst2023y019

2023 No. 3

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Article navigation > Carsologica Sinica > 2023 > 42(3): 436-447

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LIU Shijie, GUAN Qi, PAN Ming. Geochemical characteristics and paleoenvironmental implications of carbonate rocks at the Givertian and Eifelian boundary in northeast Guangxi[J]. Carsologica Sinica, 2023, 42(3): 436-447. doi: 10.11932/karst2023y019

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LIU Shijie, GUAN Qi, PAN Ming. Geochemical characteristics and paleoenvironmental implications of carbonate rocks at the Givertian and Eifelian boundary in northeast Guangxi[J]. Carsologica Sinica, 2023, 42(3): 436-447. doi: 10.11932/karst2023y019

Geochemical characteristics and paleoenvironmental implications of carbonate rocks at the Givertian and Eifelian boundary in northeast Guangxi

1.
Hebei Key Laboratory of Strategic Critical Mineral Resources, Hebei GEO University, Shijiazhuang, Hebei 050031, China
2.
Hebei Province Collaborative Innovation Center for Strategic Critical Mineral Research, College of Earth Sciences, Hebei GEO University, Shijiazhuang, Hebei 050031, China
3.
Institute of Karst Geology, CAGS, Guilin, Guangxi 541004, China

More Information

Corresponding author: GUAN Qi, qiguan926@163.com

Received Date: 17 June 2022

Revised Date: 25 November 2022

Accepted Date: 23 February 2023

Publish Date: 25 June 2023

Abstract

Abstract

The Devonian period, marking the initial phase of the Late Paleozoic era, has garnered considerable attention in recent decades. This heightened interest stems from its intricate climatic fluctuations, recurrent global shifts in sea levels, and a series of consequential biological catastrophes. Of particular captivation is the upper Devonian-lower Carboniferous in northeastern Guangxi, characterized by a multifaceted paleogeographic configuration known as platform-trench-basin facies. Notably, the stratigraphic progression from basin facies to open platform facies displays a notable continuity, culminating in the formation of a substantial kilometer-thick carbonate rock layer. This unique geological foundation underpins the development of a renowned karst geomorphic landscape, which is globally significant.
Furthermore, this distinctive karst landscape has facilitated the establishment of the international Devonian-Carboniferous boundary auxiliary layer profile, adding another layer of importance to the study of the Devonian system in this region. While prior investigations have primarily concentrated on sedimentary facies, paleontology, pivotal organisms, and event layers like the 'F-F' biological catastrophe event and the D/C boundary layer during the Late Devonian, certain critical events, notably the Kačak-Otomari event in the late middle Devonian, have received comparatively less attention. Moreover, a comprehensive global-scale comparative analysis has been lacking.
Given these gaps, the present study investigates a critical juncture, the boundary between the Eiffelian and Givertian systems, situated in Longyankou village, Yangshuo county. A meticulous examination was carried out, involving the collection of ten carbonate rock samples from this specific section. Through a comprehensive analysis encompassing microscopic features, elemental compositions, ratios, as well as carbon and oxygen isotope data, the study aimed to elucidate and discuss the ancient oceanic sedimentary environments in proximity to this location. Our findings can be summarized as follows:
(1) The presence of Polygnathus intermedius, a conodont fossil, is observed within the YS3 sample layer, attributed to the late Eifelian period. This fossil aids in establishing a precise temporal boundary for both the carbon isotope migration event and the Kačák event within this stratum. (2) By employing Wilson's established microfacies sedimentary model in conjunction with lithological traits, four distinct microfacies types, SMF23, SMF16, SMF4, and SMF15, have been successfully distinguished. (3) Through meticulous geochemical analysis, we draw several significant conclusions regarding the sedimentary environment during various stages: The sedimentary environment during the YS1 to YS2 transition demonstrates rapid deepening of sedimentary water and a consistent material source supply. This mirrors the geological process of swift transformation from limited platform facies to slope facies during the initial transgression phase; the low terrigenous component content during YS3 and YS4 stages indicates a distant shoreline sedimentary environment with deep waters and relatively elevated sea levels. Notably, this stage is characterized by widespread hypoxia, displaying global uniformity; Geochemical indicators for YS5 to YS10 stages exhibit minor fluctuations. Notably, the terrigenous component content gradually increases, while the appearance of radial oolitic limestone signifies a low-energy environment. Simultaneously, the sedimentary area witnesses a significant sea level decline, characterized by thicker upward progradational sequences that provide excellent sedimentary responses. (4) Reconstructing the paleoseawater temperature evolution curve based on oxygen isotope data reveals an average seawater temperature of 21 ℃ during the studied period. This temperature profile reflects a warm subtropical climate, aligning with the paleogeographic proximity to the equator. (5) The observed negative migration of carbon isotopes corresponds with the E/G boundary stratotype profile in Morocco and the carbon isotope curve characteristics observed in Canada within the same horizon as sample YS3. In summary, these findings emphasize the prevalence of a deep-water and anoxic sedimentary environment amidst a global-scale transgressive backdrop.
- northeast Guangxi /
- Kačák event /
- carbonate rocks /
- paleoenvironment /
- Devonian

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References

[1]	曾允孚, 陈洪德, 张锦泉, 刘文均. 华南泥盆纪沉积盆地类型和主要特征[J]. 沉积学报, 1992, 10(3):104-113. Google Scholar ZENG Yunfu, CHEN Hongde, ZHANG Jinquan, LIU Wenjun. Types and main characteristics of Devonian sedimentary basin in South China[J]. Acta Sedimentologica Sinica, 1992, 10(3):104-113. Google Scholar
[2]	陈洪德, 曾允孚. 右江盆地的性质及演化讨论[J]. 岩相古地理, 1990(1):28-37. Google Scholar CHEN Hongde, ZENG Yunfu. Nature and evolution of the Youjiang Basin[J]. Sedimentary Geology and Tethyan Geology, 1990(1):28-37. Google Scholar
[3]	郭文, 张朝锋, 王晓鹏. 天峨-南丹地区泥盆系罗富组页岩气成藏条件及有利区预测[J]. 石油地质与工程, 2018, 32(1):22-26, 123. Google Scholar GUO Wen, ZHANG Chaofeng, WANG Xiaopeng. Geological conditions for shale gas accumulation and favorable area prediction of Luofu Formation of Devonian in Tian'e-Nandan area[J]. Petroleum Geology and Engineering, 2018, 32(1):22-26, 123. Google Scholar
[4]	刘疆, 白志强. 广西横县六景泥盆系艾菲尔阶—吉维特阶之交化学地层研究[J]. 地质论评, 2008(5):683-693, 724. doi: 10.16509/j.georeview.2008.05.013 CrossRef Google Scholar LIU Jiang, BAI Zhiqiang. Chemostratigraphy of Eifelian-Givetian stage boundary at Liujing section, Guangxi, South China[J]. Geological Review, 2008(5):683-693, 724. doi: 10.16509/j.georeview.2008.05.013 CrossRef Google Scholar
[5]	Thomas J Suttner, Erika Kido, Carlo Corradini, Stanislava Vodráková, Monica Pondrelli, Luca Simonetto. Conodont diversity across the late Eifelian Kaák Episode of the southern Alpine realm (central Carnic Alps, Austria/Italy)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology, 2017, 479:34-47. Google Scholar
[6]	Joachimski M M, Breisig S, Buggisch W, Talent J A, Mawson R, Gereke M, Morrow J R, Day J, Weddige K. Devonian climate and reef evolution: Insights from oxygen isotopes in apatite[J]. Earth and Planetary Science Letters, 2009, 284:599-609. doi: 10.1016/j.jpgl.2009.05.028 CrossRef Google Scholar
[7]	House M R. Correlation of mid-Paleozoic ammonoid evolutionary events with global sedimentary perturbations[J]. Nature, 1985, 313:17-22. doi: 10.1038/313017a0 CrossRef Google Scholar
[8]	Michal M. Lingulate brachiopods across the Kačák Event and Eifelian–Givetian boundary in the Barrandian area, Czech Republic[J]. Bulletin of Geosciences, 2019, 94(2):169-186. Google Scholar
[9]	Walliser O H, Bultynck P, Weddige K. Definition of the Eifelian–Givetian stage boundary[J]. Episodes, 1995, 18(3):107-115. doi: 10.18814/epiiugs/1995/v18i3/002 CrossRef Google Scholar
[10]	Becker R T, Gradstein F M, Hammer O. The Devonian Period[M]//The Geological Time Scale. 2012, 559-601. Google Scholar
[11]	王成源, 陈波, 邝国敦. 广西南宁大沙田下泥盆统那高岭组的牙形刺[J]. 微体古生物学报, 2016, 33(4):420-435. Google Scholar WANG Chengyuan, CHEN Bo, KUANG Guodun. Lower Devonian conodonts from the Nagaoling Formation of the Dashatian section near Nanning, Guangxi, South China[J]. Acta Micropalaeontologica Sinica, 2016, 33(4):420-435. Google Scholar
[12]	王成源. 广西中部泥盆系二塘组的牙形刺[J]. 古生物学报, 1981(5):400-405, 489. Google Scholar WANG Chengyuan. Conodonts from Devonian Ertang Formation in central Guangxi[J]. Acta Palaeontologica Sinica, 1981(5):400-405, 489. Google Scholar
[13]	黄晶, 储雪蕾, 常华进, 冯连君. 三峡地区埃迪卡拉系陡山沱组帽碳酸盐岩的微量元素和稀土元素研究[J]. 科学通报, 2009, 54(22):3498-3506. Google Scholar HUANG Jing, CHU Xuelei, CHANG Huajin, FENG Lianjun. Trace element and rare earth element of cap carbonate in Ediacaran Doushantuo Formation in Yangtze Gorges[J]. Chinese Science Bulletin, 2009, 54(22):3498-3506. Google Scholar
[14]	储雪蕾, 张同钢, 张启锐, 冯连君, 张福松. 蓟县元古界碳酸盐岩的碳同位素变化[J]. 中国科学 (D辑: 地球科学), 2003(10):951-959. Google Scholar
[15]	Hladı́kováa J, Hladilb J, Křı́beka B. Carbon and oxygen isotope record across Pridoli to Givetian stage boundaries in the Barrandian basin (Czech Republic)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology, 1997, 132(1):225-241. Google Scholar
[16]	Gröcke Darren R, van Hengstum Peter J. Stable isotope record of the Eifelian–Givetian boundary Kačák–otomari Event (Middle Devonian) from Hungry Hollow, Ontario, Canada[J]. Canadian Journal of Earth Sciences, 2008, 45(3):353-366. doi: 10.1139/E08-005 CrossRef Google Scholar
[17]	Brooks B Ellwood, Stephen L Benoist, Ahmed El Hassani, Christopher Wheeler, Rex E Crick. Impact ejecta layer from the Mid-Devonian: Possible connection to global mass extinctions[J]. Science, 2003, 300:1734-1737. doi: 10.1126/science.1081544 CrossRef Google Scholar
[18]	梅冥相, 李仲远. 滇黔桂地区晚古生代至三叠纪层序地层序列及沉积盆地演化[J]. 现代地质, 2004(4):555-563. Google Scholar MEI Mingxiang, LI Zhongyuan. Sequence-stratigraphic succession and sedimentary-basin evolution from late Paleozotic to triassic in the Yunnan-Guizhou-Guangxi region[J]. Geoscience, 2004(4):555-563. Google Scholar
[19]	Klapper G. Sequence within the conodont genus polygnathus in the New York lower middle Devonian[J]. Geologica et Palaeontologica, 1971, 5(1):59-79. Google Scholar
[20]	李飞, 张宁, 夏文臣. 鄂西峡口地区中二叠统栖霞组碳酸盐岩微相及相序[J]. 地质科技情报, 2010, 29(1):23-28. Google Scholar LI Fei, ZHANG Ning, XIA Wenchen. Carbonate microfacies analysis on Chihsia Formation (Middle Permian) at Xiakou area, western Hubei Province[J]. Bulletin of Geological Science and Technology, 2010, 29(1):23-28. Google Scholar
[21]	马永生, 李启明, 关德师. 鄂尔多斯盆地中部气田奥陶系马五1-4碳酸盐岩微相特征与储层不均质性研究[J]. 沉积学报, 1996(1):22-32. Google Scholar MA Yongsheng, LI Qiming, GUAN Deshi. Carbonate microfacies characteristics and reservoir heterogeneity of the Ordovician weathering crust(O_1ma5_1-4) of the Zhongbu Gasfield, Ordos Basin, Northwest China[J]. Acta Sedimentologica Sinica, 1996(1):22-32. Google Scholar
[22]	潘明, 郝彦珍, 孙成杰, 吕勇, 山克强. 云南保山普里道利统沉积特征及其对冈瓦纳北缘古海洋环境的指示[J]. 地质学报, 2020, 94(5):1382-1396. doi: 10.3969/j.issn.0001-5717.2020.05.004 CrossRef Google Scholar PAN Ming, HAO Yanzhen, SUN Chengjie, LV Yong, SHAN Keqiang. Sedimentary characteristics of the Pridolian series in Baoshan, Yunnan Province and their implications for paleomarine environment[J]. Acta Geologica Sinica, 2020, 94(5):1382-1396. doi: 10.3969/j.issn.0001-5717.2020.05.004 CrossRef Google Scholar
[23]	胡明毅. 塔北柯坪奥陶系碳酸盐岩地球化学特征及环境意义[J]. 石油与天然气地质, 1994(2):158-163. Google Scholar HU Mingyi. Geochemical characteristics and environmental significance of Ordovician carbonate rocks in Keping area, Tarim Basin[J]. Petroleum Geology, 1994(2):158-163. Google Scholar
[24]	Craig H. Standard for reporting concentrations of deuterium and oxygen-18 in natural waters[J]. Science, 1961, 133(3467):1833-1834. doi: 10.1126/science.133.3467.1833 CrossRef Google Scholar
[25]	Longyi S, Jianwei D, Pengfei Z. Paleogeographic significances of carbon and oxygen isotopes in late permian rocks of Southwest China[J]. Geochimica, 1996, 25(6):575-581. Google Scholar
[26]	潘明, 郝彦珍, 吕勇, 山克强, 苏光样. 滇东北镇雄西部栖霞—茅口组碳酸盐岩地球化学特征及环境意义[J]. 地质力学学报, 2017, 23(3):348-357. doi: 10.3969/j.issn.1006-6616.2017.03.003 CrossRef Google Scholar PAN Ming, HAO Yanzhen, LV Yong, SHAN Keqiang, SU Guangyang. Geochemical characteristics and environmental significance of carbonate rocks in Qixia-Maokou Formation in western Zhenxiong, northeastern Yunnan[J]. Journal of Geomechanics, 2017, 23(3):348-357. doi: 10.3969/j.issn.1006-6616.2017.03.003 CrossRef Google Scholar
[27]	王随继, 黄杏珍, 妥进才, 邵宏舜, 阎存凤, 王寿庆, 何祖荣. 泌阳凹陷核桃园组微量元素演化特征及其古气候意义[J]. 沉积学报, 1997(1):66-71. Google Scholar WANG Suiji, HUANG Xingzhen, TUO Jincai, SHAO Hongshun, YAN Cunfeng, WANG Shouqing, HE Zurong. Evolutional characteristics and their paleoclimate significance of trace elements in the Hetaoyuan Formation, Biyang Depression[J]. Acta Sedimentologica Sinica, 1997(1):66-71. Google Scholar
[28]	王大锐, 白志强. 广西中-上泥盆统界线附近的化学地层学特征[J]. 地层学杂志, 2002, 26(1):50-54. Google Scholar WANG Darui, BAI Zhiqiang. Chemostratigraphic characteristics of the Middle-Upper Devonian boundary in Guangxi, South China[J]. Journal of Stratigraphy, 2002, 26(1):50-54. Google Scholar
[29]	王纯豪, 韩超, 韩梅, 钟文健. 川西坳陷中段雷口坡组碳酸盐岩地球化学特征及地质意义[J]. 山东科技大学学报:自然科学版, 2020, 39(1):28-36. Google Scholar WANG Chunhao, HAN Chao, HAN Mei, ZHONG Wenjian. Geochemical characteristics and geological significance of Leikoupo Formation carbonate rocks in the central western Sichuan Depression[J]. Journal of Shandong University of Science and Technology (Natural Science), 2020, 39(1):28-36. Google Scholar
[30]	李忠雄, 管士平. 扬子地台西缘宁蒗泸沽湖地区志留系沉积旋回及锶、碳、氧同位素特征[J]. 古地理学报, 2001(4):69-76. Google Scholar LI Zhongxiong, GUAN Shiping. Sedimentary cycle and strontium, carbon, oxygen isotopes of the Silurian at Luguhu region in Ninglang county of western margin of Yangtze platform[J]. Journal of Palaeogeography, 2001(4):69-76. Google Scholar
[31]	Königshof P, Da Silva A C, Suttner T J, Kido E, Waters J A, Carmichael S K, Jansen U, Pas D, Spassov S. Shallow-water facies setting around the Kačák Event: A multidisciplinary approach[J]. Geological Society Special Publications, 2016, 423(1):171-199. doi: 10.1144/SP423.4 CrossRef Google Scholar