Journal of Quaternary Science最新文献

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The past is uncertain: alternative responses of cloud forest mammals to the Last Glacial Maximum in the Oaxacan Highlands, Mexico 过去不确定:墨西哥瓦哈卡高原云林哺乳动物对末次冰川极盛期的其他反应
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-02-07 DOI: 10.1002/jqs.3600
Lázaro Guevara
{"title":"The past is uncertain: alternative responses of cloud forest mammals to the Last Glacial Maximum in the Oaxacan Highlands, Mexico","authors":"Lázaro Guevara","doi":"10.1002/jqs.3600","DOIUrl":"10.1002/jqs.3600","url":null,"abstract":"<div>\u0000 \u0000 <p>The Last Glacial Maximum (LGM; 26,000–19,000 years before the present) altered the distribution of species worldwide. Its effect is poorly known in tropical regions because the cooling and drought reached during that period are uncertain. Here, I generated hypotheses regarding the possible responses of cloud forest mammals in the Oaxacan Highlands (OH) of Mexico, a region with one of the most extensive cloud forests in the Neotropics. First, I used three General Circulation Models (GCMs: CCSM3, MIROC-ESM and MPI) to characterize probable climates during the LGM. Then, I used ecological niche models to estimate the current and LGM potential distributions of four cloud forest species. As in other locations, the results show that GCMs are consistent with cooler conditions relative to today; however, the three GCMs estimate precipitation regimes with notable variations in the region. MPI indicates that the LGM could have been even wetter than present. Consequently, the MPI scenario allowed more widespread potential distributions of mammals. The paleodistributions show how mid- and lowlands were essential for the long-term survival of these ‘high-mountain mammals’ throughout the last glacial–interglacial cycle. The paleodistributions presented here are precise hypotheses that can be tested based on paleoecological and genetic evidence.</p>\u0000 </div>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"386-396"},"PeriodicalIF":2.3,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139798351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Climate and community in Central Mesa Verde 中梅萨韦德的气候和社区
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-02-02 DOI: 10.1002/jqs.3596
Sean Field, Donna M. Glowacki
{"title":"Climate and community in Central Mesa Verde","authors":"Sean Field,&nbsp;Donna M. Glowacki","doi":"10.1002/jqs.3596","DOIUrl":"10.1002/jqs.3596","url":null,"abstract":"<p>Periods of acute climate stress – the convergence of low subsistence yields due to poor climate conditions and ineffective buffering strategies due to climate variability – critically reduces peoples’ ability to subsist and mitigate food shortages, thereby creating conditions that could result in profound social change. Here, paleoclimate reconstructions are used to identify periods of acute stress at three large Ancestral Pueblo villages in the US Southwest. These periods are examined in relation to occupation histories at each village showing that in certain instances, acute climate stress played a primary role in people's decisions to leave communities. However, not all of the communities reacted to stress in the same way indicating that distinct patterns of climate and social context played an important role in influencing how acute climate stress was experienced by different groups. Results from this study highlight the importance of community-specific histories when considering the impact of climate stress on past people.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"488-504"},"PeriodicalIF":2.3,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3596","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139769569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Holocene overflow events of the lower Yellow River recorded in Huangdun ancient lake, northern Jiangsu Plain, China 中国江苏北部平原黄墩古湖记录的全新世黄河下游泛滥事件
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-02-01 DOI: 10.1002/jqs.3599
Rui Zhang, Li Xing, Shi-Yong Yu, Junsheng Nie, Jinjia Wu, Zhao Wang, Shiyue Chen, Zhanfang Hou, Guodong Zhang, Denghui Zhang
{"title":"Holocene overflow events of the lower Yellow River recorded in Huangdun ancient lake, northern Jiangsu Plain, China","authors":"Rui Zhang,&nbsp;Li Xing,&nbsp;Shi-Yong Yu,&nbsp;Junsheng Nie,&nbsp;Jinjia Wu,&nbsp;Zhao Wang,&nbsp;Shiyue Chen,&nbsp;Zhanfang Hou,&nbsp;Guodong Zhang,&nbsp;Denghui Zhang","doi":"10.1002/jqs.3599","DOIUrl":"10.1002/jqs.3599","url":null,"abstract":"<div>\u0000 \u0000 <p>Overflow events are important embodiments of the evolutionary characteristics of the lower Yellow River. Lakes in the lower reaches of the Yellow River have the capacity to record these events. Due to the complex provenance and transport pathways of sediments in local lakes, it is difficult to extract reliable information on sediments delivered by the Yellow River based on conventional methods and proxies. Here, we show results from a genetically meaningful end-member (EM) decomposition of sediment grain-size data from Huangdun ancient lake. The grain-size of the sediments can be decomposed into three end-members. Comprehensive analysis combining environmental magnetism and geochemical indicators clarifies the significance of each end-member. EM1 represents mixed signals of various proximal fluvial sediments and the Yellow River materials. EM2 is similar to terrestrial fine-grained debris in conjunction with local pedogenic materials, aeolian inputs and some Yi River materials. EM3 represents a component that is mainly derived from long-distance transport by the lower Yellow River. End-member analysis successfully identified overflow events of the lower Yellow River on a southward-flowing path during the Holocene. This study provides a meaningful attempt to reconstruct the evolutionary history of the lower Yellow River from sedimentary records.</p>\u0000 </div>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"443-456"},"PeriodicalIF":2.3,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139656542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preservation of plant-wax biomarkers in deserts: implications for Quaternary environment and human evolutionary studies 沙漠中植物蜡生物标志物的保存:对第四纪环境和人类进化研究的影响
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-02-01 DOI: 10.1002/jqs.3597
Deepak Kumar Jha, Robert Patalano, Jana Ilgner, Hema Achyuthan, Abdullah M. Alsharekh, Simon Armitage, James Blinkhorn, Nicole Boivin, Paul S. Breeze, Ravindra Devra, Nicholas Drake, Huw S. Groucutt, Maria Guagnin, Patrick Roberts, Michael Petraglia
{"title":"Preservation of plant-wax biomarkers in deserts: implications for Quaternary environment and human evolutionary studies","authors":"Deepak Kumar Jha,&nbsp;Robert Patalano,&nbsp;Jana Ilgner,&nbsp;Hema Achyuthan,&nbsp;Abdullah M. Alsharekh,&nbsp;Simon Armitage,&nbsp;James Blinkhorn,&nbsp;Nicole Boivin,&nbsp;Paul S. Breeze,&nbsp;Ravindra Devra,&nbsp;Nicholas Drake,&nbsp;Huw S. Groucutt,&nbsp;Maria Guagnin,&nbsp;Patrick Roberts,&nbsp;Michael Petraglia","doi":"10.1002/jqs.3597","DOIUrl":"10.1002/jqs.3597","url":null,"abstract":"<p>Analysis of plant-wax biomarkers from sedimentary sequences can enable past environmental and hydrological reconstruction and provide insights into past hominin adaptations. However, biomarker preservation in desert contexts has been considered unlikely given the sparse nature of the vegetation within the landscape. Here we evaluate the preservation of <i>n</i>-alkanes and fatty acids collected from four depositional sequences associated with archaeological contexts in the Nefud Desert, Saudi Arabia, and the Thar Desert, India. Pleistocene and Holocene samples were selected to understand the effects of age on preservation. The results of molecular distribution patterns and indices, particularly the high carbon preference index and average chain length, show the preservation of plant-wax biomarkers in both the Holocene and Pleistocene desert sequences, while δ<sup>13</sup>C values and organic content provide insights into the vegetation contributing to the plant-wax organic pool. This study provides a baseline for understanding human–environment interactions and for reconstructing changes in arid land habitats of relevance to hominins during the Quaternary.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"349-358"},"PeriodicalIF":2.3,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3597","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139656547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The southern Brazilian tropical forest during the penultimate Pleistocene glaciation and its termination 巴西南部热带森林在更新世倒数第二次冰川时期及其终结
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-01-31 DOI: 10.1002/jqs.3594
Adriana Mercedes Camejo Aviles, Marie-Pierre Ledru, Fresia Ricardi-Branco, Gisele C. Marquardt, Denise de Campos Bicudo
{"title":"The southern Brazilian tropical forest during the penultimate Pleistocene glaciation and its termination","authors":"Adriana Mercedes Camejo Aviles,&nbsp;Marie-Pierre Ledru,&nbsp;Fresia Ricardi-Branco,&nbsp;Gisele C. Marquardt,&nbsp;Denise de Campos Bicudo","doi":"10.1002/jqs.3594","DOIUrl":"10.1002/jqs.3594","url":null,"abstract":"<p>To describe the composition of the penultimate glacial Brazilian Atlantic forest, we analyzed pollen, charcoal and diatoms deposited in the section from 871 to 1400 cm of core CO14 drilled in the Colônia basin in southeastern Brazil. The landscape was characterized by a cool grassland with three conifer genera: <i>Araucaria</i>, <i>Podocarpus</i> and <i>Ephedra</i>. Total arboreal pollen frequency did not change during the transition from glacial to interglacial conditions. Changes in <i>Podocarpus</i> frequency and concentration showed out-of-phase responses with austral summer insolation at an orbital scale while, at a millennial scale, both northern and southern hemisphere ice volume controlled the interplay between positions of the Inter-Tropical Convergence Zone and South Tropical Front (STF), which in turn defined the latitudinal distribution of rainfall. The disappearance of <i>Podocarpus</i> and the decrease of <i>Araucaria</i> observed between ~167 and 160 ka were related to a dry interval which was not observed elsewhere. During Termination II a progressive decrease in conifer pollen taxa was in phase with a southward shift in the STF and increase in Atlantic sea surface temperatures. Our results show that southern hemisphere conifer distribution is strongly linked to austral summer insolation and winter precipitation and will be threatened by the southward expansion of the summer rainfall boundary.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"373-385"},"PeriodicalIF":2.3,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3594","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139659347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
First reported fossil occurrences of Phrynosoma sp. from the Columbia Plateau (Washington State, USA) dated to the Late Pleistocene 哥伦比亚高原(美国华盛顿州)首次发现的麒麟座化石,年代为晚更新世
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-01-29 DOI: 10.1002/jqs.3595
Audra J. Richter, Brian J. Pickles, Bax R. Barton
{"title":"First reported fossil occurrences of Phrynosoma sp. from the Columbia Plateau (Washington State, USA) dated to the Late Pleistocene","authors":"Audra J. Richter,&nbsp;Brian J. Pickles,&nbsp;Bax R. Barton","doi":"10.1002/jqs.3595","DOIUrl":"10.1002/jqs.3595","url":null,"abstract":"<p>Reptiles, squamates in particular, can be extremely valuable as indicator species due to their commonly small fundamental niche ranges. Yet these taxa are often overlooked in North American Cenozoic palaeoecological studies in favour of mammalian specimens. At the Coyote Canyon Mammoth Site (CCMS) on the Columbia Plateau (eastern Washington State, USA) excavation has focused on the collection and subsequent identification of all diagnostic fossil specimens, whether associated directly with the mammoth remains or not, including small non-mammalian vertebrates and invertebrates. Here we show that with appropriate excavation techniques, microvertebrate fossils are recoverable and can be identified to at least the genus level. We place the identification of two fossils of <i>Phrynosoma</i> at the CCMS, dated to ~13 and 15 ka, in the context of all recorded fossils identified to this genus in North America since the Middle Miocene. These specimens represent the first fossils of <i>Phrynosoma</i> adequately described and reported from the Columbia Plateau and the greater Pacific Northwest.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"397-407"},"PeriodicalIF":2.3,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3595","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139648535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Forest fires in southwest Western Siberia: the impact of climate and economic transitions over 9000 years 西西伯利亚西南部的森林火灾:9000 年来气候和经济转型的影响
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-01-22 DOI: 10.1002/jqs.3593
N. E. Ryabogina, M. I. Nesterova, R. R. Utaygulova, E. D. Trubitsyna
{"title":"Forest fires in southwest Western Siberia: the impact of climate and economic transitions over 9000 years","authors":"N. E. Ryabogina,&nbsp;M. I. Nesterova,&nbsp;R. R. Utaygulova,&nbsp;E. D. Trubitsyna","doi":"10.1002/jqs.3593","DOIUrl":"10.1002/jqs.3593","url":null,"abstract":"<div>\u0000 \u0000 <p>Here we compare the long-term dynamics of fires in the southern taiga of Western Siberia with changes in the environment and ancient economies. Utilizing charcoal particles extracted from peat sediments, we assess charcoal accumulation rates to identify the neighborhood level of fires. Comparison of changes in vegetation, climate and land-use history with fire dynamics reveals that wildfires were climate-dependent but inconsequential during the first half of the Holocene (9.0–4.1k cal a <span>bp</span>) in the hunter-gatherer period. Critical changes and a notable increase in fires were observed in the Late Holocene when pyrogenic events correlate poorly with changes in vegetation cover and climate. Nevertheless, after 4.1k cal a \u0000<span>bp</span>, a direct relationship between fire frequency and economic features emerged, primarily linked to the introduction of animal husbandry and metallurgy, along with an increase in the number of settlements. Subsequently, fire activity increased, remaining higher even during periods of cooling and increased humidity, and this appears to have been related more closely to the economic strategies and periods of depopulation. Thus, even in Siberia, where agriculture had not been practised until the last few centuries, the transition to a productive economy in the Bronze Age brought decisive changes in the dynamics of forest fires.</p></div>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"432-442"},"PeriodicalIF":2.3,"publicationDate":"2024-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139517508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Configuration and timing of the postglacial marine incursion along the eastern Ungava Peninsula (Nunavik, Canada): implications for deglaciation models 冰期后海洋入侵沿翁加瓦半岛东部(加拿大努纳维克)的构造和时间:对脱冰期模型的影响
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-01-12 DOI: 10.1002/jqs.3591
Claudie Lefebvre-Fortier, Martin Roy, Hugo Dubé-Loubert, Etienne Brouard, Joerg M. Schaefer
{"title":"Configuration and timing of the postglacial marine incursion along the eastern Ungava Peninsula (Nunavik, Canada): implications for deglaciation models","authors":"Claudie Lefebvre-Fortier,&nbsp;Martin Roy,&nbsp;Hugo Dubé-Loubert,&nbsp;Etienne Brouard,&nbsp;Joerg M. Schaefer","doi":"10.1002/jqs.3591","DOIUrl":"10.1002/jqs.3591","url":null,"abstract":"<p>The final deglaciation stages of the Laurentide Ice Sheet in northern Quebec–Labrador were marked by the incursion of the d'Iberville Sea into the coastal areas of Ungava Bay. Remote and field mapping of raised marine strandlines along the Ungava Peninsula east coast show that the maximum marine limit decreases from south (165 m) to north (100 m), reflecting differential uplift linked to an ice mass remnant located to the southwest of the bay. Reconstruction of the uppermost marine limit in two east–west transects extending into the Peninsula interior reveals distinct sea-level stands with limited extents towards the west, indicating that the early stages of the marine incursion occurred in contact with the ice margin. The reconstruction also identifies the maximum eastward extent of ice-dammed lakes that occupied the Arnaud River and Aux-Feuilles River valleys. <sup>10</sup>Be surface exposure dating of marine strandlines yielded consistent <sup>10</sup>Be ages that indicate a rapid deglaciation of Ungava Bay between 8900 ± 200 a (north) and 7900 ± 200 a (south). These results provide constraints on the position of the Labrador Sector eastern and western ice margins during the late deglaciation, in addition to the timing of ice and meltwater discharges from the Ungava Bay region.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"359-372"},"PeriodicalIF":2.3,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3591","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139461218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Late MIS5a in the southern North Sea: new chronostratigraphic insights from the Brown Bank Formation 北海南部的 MIS5a 晚期:布朗银行地层的年代地层学新见解
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-01-08 DOI: 10.1002/jqs.3592
Irene M. Waajen, Freek S. Busschers, Timme H. Donders, Sytze Van Heteren, Ruth Plets, Jakob Wallinga, Rick Hennekam, Gert-Jan Reichart, Tim Kinnaird, Friederike Wagner-Cremer
{"title":"Late MIS5a in the southern North Sea: new chronostratigraphic insights from the Brown Bank Formation","authors":"Irene M. Waajen,&nbsp;Freek S. Busschers,&nbsp;Timme H. Donders,&nbsp;Sytze Van Heteren,&nbsp;Ruth Plets,&nbsp;Jakob Wallinga,&nbsp;Rick Hennekam,&nbsp;Gert-Jan Reichart,&nbsp;Tim Kinnaird,&nbsp;Friederike Wagner-Cremer","doi":"10.1002/jqs.3592","DOIUrl":"10.1002/jqs.3592","url":null,"abstract":"<p>The Brown Bank Formation (BB Fm) is a clay-rich sedimentary unit that is distributed over a large area in the southern North Sea. It is easily recognisable in 2D acoustic reflection profiles, forming sets of subparallel high-amplitude reflections. Previous studies have provided only fragmentary information on the facies, and a variety of interpretations on the depositional environment and age of the BB Fm. In this study we combine high-resolution 2D acoustic reflection profiles and multiproxy sedimentological, geochemical and geochronological analyses of three vibrocores, to provide a detailed description and a new age assessment for the BB Fm at its type locality, adjacent to the Brown Bank ridge. At the study site, the BB Fm shows morphologically well-preserved submarine sand dunes, deposited in a high-energy shelf setting, overlain by organic-rich silty clays that were deposited under lower-energy conditions in an increasingly compartmentalised marginal marine environment. Elevated terrestrial organic input shows that the Rhine–Meuse delta was situated relatively close-by. Luminescence ages indicate that the sediments of the BB Fm in our cores were deposited during the Weichselian Odderade interstadial (MIS5a, ca. 80 ka) and earliest parts of the Early Pleniglacial (MIS4, ca. 70 ka), which is later than previously reported in the literature.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"408-420"},"PeriodicalIF":2.3,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3592","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139397542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vertical acoustic blanking in seismic data from the German North Sea: a spotlight to shallow gas-bearing incised channels 德国北海地震数据中的垂直声波消隐:浅层含气切槽的聚焦点
IF 2.3 3区 地球科学
Journal of Quaternary Science Pub Date : 2024-01-08 DOI: 10.1002/jqs.3590
Niklas Ahlrichs, Axel Ehrhardt, Michael Schnabel, Christian Berndt
{"title":"Vertical acoustic blanking in seismic data from the German North Sea: a spotlight to shallow gas-bearing incised channels","authors":"Niklas Ahlrichs,&nbsp;Axel Ehrhardt,&nbsp;Michael Schnabel,&nbsp;Christian Berndt","doi":"10.1002/jqs.3590","DOIUrl":"10.1002/jqs.3590","url":null,"abstract":"<p>Seismic data from the North Sea commonly show vertical acoustic blanking (VAB) often interpreted as fluid conduits with implications for Quaternary development. The robustness of this interpretation has long been controversial as the infill of tunnel valleys can also cause vertical blanking. Using 2D and 3D seismic data and sediment echosounder data from the German North Sea, we investigate VAB to determine a geological or imaging origin of these anomalies. We detected multiple VAB occurrences throughout the North Sea. 3D data from the Ducks Beak (‘Entenschnabel’) reveal a correlation of VAB with bright spots in incised channels directly below the seafloor. Large source–receiver distances allow imaging the subsurface below the channel without signal penetrating through it (undershooting). This method removes the blanking. Energy absorption by shallow biogenic gas trapped within the channels explains the observed VAB. Hence, the blanking represents an imaging artifact, highlighting the need for careful seismic processing with sufficient offset before interpreting such anomalies as fluid pathways. The channels belong to a postglacial channel system related to the now submerged lowlands of Doggerland. This work demonstrates the usability of mapping VAB to detect shallow features for paleo-landscape reconstruction and identification of shallow gas for hazard assessments, for example.</p>","PeriodicalId":16929,"journal":{"name":"Journal of Quaternary Science","volume":"39 3","pages":"421-431"},"PeriodicalIF":2.3,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jqs.3590","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139397469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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