Journal of Palaeogeography最新文献

{"title":"Coupling of the recovery of earliest Silurian sponges and ocean redox conditions: Evidence from South China","authors":"Yong Wang ,&nbsp;Joseph P. Botting ,&nbsp;Jing-Qiang Tan ,&nbsp;Ming Li ,&nbsp;Wen-Hui Wang","doi":"10.1016/j.jop.2023.03.005","DOIUrl":"https://doi.org/10.1016/j.jop.2023.03.005","url":null,"abstract":"<div><p>Many aspects of the Late Ordovician Mass Extinction (LOME) aftermath and recovery have been puzzling due to heterogeneities in tempo and triggering mechanisms. Benthic fossil groups, which are the most severely affected by oxidative stress, offer the best opportunities for understanding both biological and ecological recovery after the LOME. In recent studies, deep-water sponge assemblages (which may have had high physiological tolerance to oxygen deviations) have been reported widely across South China in the immediate aftermath of the extinction interval. In order to further explore the lateral and temporal distributions of sponges, and ecological effects of benthic recovery during this critical interval, this study presents new Llandovery sponge assemblages recovered from two sections in Hunan Province, South China, accompanied by geochemical analyses. The sponge communities are preserved by pyritic spicule replacements and shows a relatively deep-water affinity (estimated around 60–150 m in depth) comparable to several previously reported assemblages in South China, and consistent with the observed graptolite ecology. Geochemical analysis of total organic carbon (TOC) and major and trace element composition in both sections show similar trends, indicating a shift in redox state of the bottom-water from persistent anoxia or intermittent euxinia in the earliest Rhuddanian, becoming oxygenated in the early Aeronian. Based on the present study and previous biological and geochemical data from South China, the distribution of early Silurian sponge assemblages in South China demonstrates a gradual expansion towards deeper regions when ocean redox conditions ameliorated. This study confirms the continuity of the end-Ordovician sponge faunas and taxa, both laterally across South China, and temporally through the early Silurian. The pioneering colonization of sponges in low-oxygen environments after the LOME may have set the stage for the subsequent recovery of other benthic organisms.</p></div>","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 2","pages":"Pages 311-330"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50190631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distinguishing celadonite from glauconite for environmental interpretations: a review","authors":"Pragya Singh ,&nbsp;Santanu Banerjee ,&nbsp;Tathagata Roy Choudhury ,&nbsp;Satadru Bhattacharya ,&nbsp;Kanchan Pande","doi":"10.1016/j.jop.2023.02.001","DOIUrl":"https://doi.org/10.1016/j.jop.2023.02.001","url":null,"abstract":"<div><p>Celadonite and glauconite are comparable in terms of physical, chemical and mineralogical characteristics. Formation of both these minerals requires slightly oxygen-depleted conditions in a semi-confined micro-environment, facilitating the uptake of Fe into the structure. Although glauconite is ubiquitous in marine deposits, celadonite forms in both marine and non-marine environments, more commonly by altering intermediate to mafic rocks. A review of data across the geological column shows that both these minerals are more common in the Mesozoic and Cenozoic, which may be related to extensive volcanism. The composition of celadonite and glauconite is highly variable and is controlled by the availability of cations within the pore water micro-environment. The major element composition of celadonite overlaps with that of evolved to highly evolved glauconite to a large extent. Existing data and representative samples of celadonite and glauconite reveal subtle differences in X-ray diffraction parameters and Fourier transform infrared (FTIR) spectra. Celadonite shows sharper basal and hkl reflections than glauconite. It characteristically exhibits distinct 11 <span><math><mrow><mover><mn>1</mn><mo>¯</mo></mover></mrow></math></span>–021, 003–022, 023 and 130–13 <span><math><mrow><mover><mn>1</mn><mo>¯</mo></mover></mrow></math></span>, and 060 reflections at less than 1.51 Å, indicating a better-ordered crystallographic structure than glauconite. The FTIR spectra of celadonite and glauconite show similar absorption bands although Si–O bending, Si–O stretching and OH–stretching bands are sharper and well resolved in celadonite than that of glauconite. For palaeoenvironmental interpretations, it is, therefore, necessary to examine the subtle differences in X-ray diffraction parameters and FTIR spectra to confirm the identification of these two minerals. The composition of celadonite relates closely to the host rock and depositional environment. The celadonite associated with mafic rock shows relatively high Fe, Mg and low Al contents. In contrast, those associated with felsic to intermediate composition rocks show slightly higher contents of Al and lower content of Fe, Mg. The mineral chemistry of celadonite varies from marine to continental settings. Marine celadonite contains higher Fe, Mg and lesser Al than their non-marine counterpart. Celadonite with relatively higher Al may show slightly lower interlayer K than Fe and Mg-rich celadonite for charge balancing.</p></div>","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 2","pages":"Pages 179-194"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50190649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Provenance of the Early Permian bauxitic claystone in Huayingshan region, Sichuan Basin, South China: Constraints from U–Pb ages and trace elements of detrital zircons","authors":"Tian-Jia Liu ,&nbsp;Xun-Lian Wang ,&nbsp;Zhen-Tao Wang ,&nbsp;Xi-Fang Liu ,&nbsp;Peng-Cheng Ju ,&nbsp;Jia-Ai Zhong","doi":"10.1016/j.jop.2023.03.002","DOIUrl":"https://doi.org/10.1016/j.jop.2023.03.002","url":null,"abstract":"<div><p>The Early Permian bauxite in the Sichuan Basin is an important part of karst-type bauxite deposits in South China Block and its provenance is poorly understood. Here we present results of mineralogy, whole-rock geochemistry, detrital zircon U–Pb ages and trace element compositions of the bauxitic claystone from the Lower Permian Dazhuyuan Formation and those of the siltstone from the underlying Lower Silurian Hanjiadian Formation in Huayingshan region, Sichuan Basin, South China Block to constrain the provenance of the bauxitic claystone. Detrital zircons from bauxitic claystone and siltstone have similar age spectra, and the ages of bauxitic claystone are classified into five groups of 2600–2200 Ma, 1800–1600 Ma, 1200–900 Ma, 900–650 Ma, and 650–400 Ma respectively. Those of the siltstone are classified into four groups of 2600–2200 Ma, 1200–900 Ma, 900–650 Ma, and 650–400 Ma respectively. We propose that the bauxitic claystone in the study region has mixed sources: the siltstone of the Lower Silurian Hanjiadian Formation probably constitutes the dominant source, and the Late Paleoproterozoic magmatic rocks along the western margin of the Yangtze Block are probably the secondary source. Moreover, the source materials of the Hanjiadian Formation siltstone are mainly sourced from Grenville-aged magmatic rocks in the Cathaysia Block and Neoproterozoic magmatic rocks in the Jiangnan orogen, with minor contributions from the underlying clastic sediments in the Cathaysia Block and Pan-African magmatic rocks in the orogen in eastern Gondwana.</p></div>","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 2","pages":"Pages 211-228"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50190647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tribute to Prof. Zeng-Zhao Feng","authors":"","doi":"10.1016/j.jop.2023.01.007","DOIUrl":"https://doi.org/10.1016/j.jop.2023.01.007","url":null,"abstract":"","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Page 25"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Petrological and geochemical characteristics of the Ordovician–Silurian black shale in eastern Sichuan and western Hubei, South China: Differential sedimentary responses to tectonism and glaciation","authors":"Quan-Sheng Cai ,&nbsp;Ming-Yi Hu ,&nbsp;Oumar Ibrahima Kane ,&nbsp;Zhi Yang ,&nbsp;Ya-Ru Wen ,&nbsp;Qun Luo ,&nbsp;Ming-Tao Li ,&nbsp;Zhong-Gui Hu ,&nbsp;Qing-Jie Deng","doi":"10.1016/j.jop.2022.09.003","DOIUrl":"https://doi.org/10.1016/j.jop.2022.09.003","url":null,"abstract":"<div><p>During the Ordovician–Silurian transition period, the Yangtze area experienced significant environmental changes, which were recorded by the widely distributed black shale of the Upper Ordovician Wufeng and Lower Silurian Longmaxi formations. However, the petrological and geochemical analyses of the Upper Ordovician-Lower Silurian black shale in Well JY1 (eastern Sichuan Basin) and Well YY2 (western Hubei Province) drill cores show that there are some significant differences with respect to lithology, thickness, and geochemical characteristics despite the long-term similar variation trend in petrology and geochemistry. This may suggest some major environmental changes and their differential influence on black shale deposition in the Yangtze area. Based on the analyses of lithology, total organic carbon (TOC), Mo_EF, and U_EF, four long-term sedimentary cycles (one for the Wufeng Formation and three for the Longmaxi Formation) were identified in Well JY1. In Well YY2, only three long-term sedimentary cycles can be recognized (one for the Wufeng Formation and two for the Longmaxi Formation). Different from the gradual increase of the geochemical proxies (such as TOC, Mo_EF, and Ni_EF) followed by an abrupt decrease in the Wufeng Formation, these proxies of the Silurian sedimentary cycles in both wells exhibit an abrupt increase at the base followed by a gradual decrease, showing that controlling mechanisms for the Lower Silurian black shale deposition in the study areas were different from those of the Upper Ordovician black shale. However, the black shale of each Silurian cycle in Well JY1 is much thicker than that in Well YY2. Compared with the thick silty mudstone developed in Well JY1 during the Rhuddanian–Aeronian transition, there is a stratigraphic gap in Well YY2 except for a thin calcareous dolostone formed in a strongly restricted environment. These differences indicate that tectonism and glacial eustasy should be the key factors for black shale development, but their influences on the deposition of the Lower Silurian black shale varied between eastern Sichuan Basin and western Hubei province. Since the early Rhuddanian stage, continuous tectonic subsidence in eastern Sichuan Basin promoted the development of thick black shale, while a persistent tectonic uplift in western Hubei Province led to the formation of thin black shale. Meanwhile, the study areas experienced a significant sea-level drop related to intensified glaciation during the Rhuddanian–Aeronian transition, which is recorded by the low chemical index of alteration (CIA) values in both wells. This resulted in the formation of a stratigraphic gap in western Hubei Province and the deposition of thick silty mudstone in eastern Sichuan Basin. Moreover, abrupt increases in CIA, TOC, Mo_EF, and Ni_EF observed in the lower part of the Aeronian black shale in the two wells suggest that eastern Sichuan Basin and weste","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Pages 129-152"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Northeastern Asia humidification at the end of the Miocene drives the boost of mammalian dispersals from the Old to New World","authors":"Qigao Jiangzuo ,&nbsp;Shi-Qi Wang","doi":"10.1016/j.jop.2022.09.002","DOIUrl":"https://doi.org/10.1016/j.jop.2022.09.002","url":null,"abstract":"<div><p>Mammals have high dispersal ability, and many lineages can spread across the continents when a landbridge appears. Here, we summarize the dispersal of mammals between the Old and New World at the end of the Miocene. Our analysis suggested that the three phases of dispersal represented the largest dispersal tide during the Neogene, and the direction of dispersal is dominated by being from the Old to New World. Judging from the components that crossed the dispersal corridor, the Arctic environment near the Beringia corridor in the first phase (∼7.5 Ma) is a mixed environment, and in the second phase (∼6.5 Ma) is an open environment, and in the third phase (∼5.8 Ma and continue to the Pliocene) is a wooded (closed) environment. A clear trend of eastern Asian humidification driven by Asian monsoon and the global C4 grassland expansion explain this dispersal pattern. The boost of mammalian dispersals is controlled by the heterogeneity of environmental changes in different continents.</p></div>","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Pages 50-68"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"毕生之力探海陆变迁 一腔激情领学科发展","authors":"Zhi-Dong Bao,&nbsp;Yuan Wang,&nbsp;Xiu-Juan Zheng","doi":"10.1016/j.jop.2023.01.003","DOIUrl":"https://doi.org/10.1016/j.jop.2023.01.003","url":null,"abstract":"","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Pages 1-2"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In memory of respected Prof. Zeng-Zhao Feng","authors":"Long-Yi Shao","doi":"10.1016/j.jop.2023.01.008","DOIUrl":"https://doi.org/10.1016/j.jop.2023.01.008","url":null,"abstract":"","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Pages 26-27"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tribute to Prof. Zeng-Zhao Feng","authors":"","doi":"10.1016/j.jop.2023.01.005","DOIUrl":"https://doi.org/10.1016/j.jop.2023.01.005","url":null,"abstract":"","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Pages 4-7"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The first megafossil of Cibotium within its modern distribution","authors":"Jia-Rong Hu ,&nbsp;Hao Zhang ,&nbsp;Lu-Liang Huang ,&nbsp;Xin-Kai Wu ,&nbsp;Robert A. Spicer ,&nbsp;Cheng Quan ,&nbsp;Jian-Hua Jin","doi":"10.1016/j.jop.2022.12.002","DOIUrl":"https://doi.org/10.1016/j.jop.2022.12.002","url":null,"abstract":"<div><p>The ‘man fern’ (<em>Cibotium</em>, Cibotiaceae), a typical tree fern of tropical and subtropical climates, is today mainly distributed in the Hawaiian Islands, Mesoamerica, and tropical and subtropical regions of East and Southeast Asia. Reliable fossil records of this genus are rare. Only two cases of stem fossils have been reported from the Upper Cretaceous of Iwate-Ken, Japan and the upper Eocene of Oregon, USA. In this paper, ultimate fertile pinna fossils of <em>Cibotium</em> are described from the Miocene Erzitang Formation of Guiping Basin, Guangxi Zhuang Autonomous Region, South China, which also preserve <em>in situ</em> spores and cuticles. As the first global discovery of <em>Cibotium</em> pinna fossils preserving both <em>in situ</em> spores and cuticles, this find enriches the organ types of <em>Cibotium</em> fossils. This is also the first discovery of <em>Cibotium</em> fossils within its modern distribution range, indicating that <em>Cibotium</em> had migrated southwards into its modern distribution by at least the Miocene. Based on the modern habitat of <em>Cibotium</em>, we infer that the Guiping Basin was under a warm and humid tropical/subtropical climate in the Miocene.</p></div>","PeriodicalId":100819,"journal":{"name":"Journal of Palaeogeography","volume":"12 1","pages":"Pages 96-106"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50189047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}