Xiuming Liu

Xiuming Liu
Fujian Normal University · Geography

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112
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Publications

Publications (112)
Article
In this study, a systematic comparison of the magnetic properties of the Xifeng loess in northern China and the Titel loess in northern Serbia was conducted. This comparison was performed to identify the causes of the different ranges of magnetic susceptibility (χlf) enhancements from loess units to paleosol units between the two regions. Ultimatel...
Article
Paleosols are useful evidence of paleoclimates and paleoenvironments independent of fossils. Zhangye Danxia National Geopark of Gansu Province (northwestern China) has been protected for its stunning varicolored badlands of Early Cretaceous (Aptian-Albian) claystones. However, the paleoclimates and paleoenvironments forming such unique succession a...
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Plain Language Summary Ultra‐high loess sedimentation rates around the Sanmen Gorge outlet since the formation of S2 palaeosols (0.24 Ma) has been interpreted as resulting from the drainage of the river through the gorge, while fluvial terraces underlying by S14 palaeosols is expected to yield a time contrast of 1.2 Ma. In this study, we investigat...
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Magnetotactic bacteria (MTB) rely on magnetotaxis to effectively reach their preferred living habitats, whereas experimental investigation of magnetotactic advantage in stable sediment is currently lacking. We studied two wild type MTB (cocci and rod-shaped M . bavaricum ) in sedimentary environment under exposure to geomagnetic field in the labora...
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The changing pattern of magnetic characteristics in eastern European loess deposits is the most similar across the world to that of the Chinese Loess Plateau, both of which are dominated by the strength of pedogenesis. Hence a systematical study to the rock magnetism of eastern European loess is not only helpful for understanding the paleoclimatic...
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The magnetic susceptibility of the loess-paleosol sequence is considered a significant indicator for recording paleoclimate, and the relationship is different between magnetic susceptibility and climate variation in diverse regions. A deep analysis of the composition, content, and evolution mechanism of magnetic minerals is helpful to enhance our u...
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Chalks are generally believed to have formed in shallow marine environments. However, the consensus on sources of Fe and origin of hematite in red chalks remains elusive. To better understand the origin of hematite in the Middle Cretaceous red chalks on the eastern coast of England, the evidence has been gathered through diffuse reflection, trace e...
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The thick loess-palaeosol sequences of the Chinese Loess Plateau (CLP) are valuable continental archives of paleoclimatic and paleoenvironmental changes since at least the mid-Miocene. The magnetic susceptibility record of loess sequences is frequently used for palaeoclimatic reconstruction. However, the two magnetoclimatological models for the mag...
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The magnetic measurement is an effective tool to identify the source of pollutants and diagnose the urban pollution. In this study, 132 group samples (that topsoil and street dust were sampled at the same location is regarded as a group) were collected from Xinyang, central eastern China. In addition, the background samples (19 topsoils under woodl...
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Late Permian and Triassic red mudstones are widely distributed and exposed in southwestern England. This homogenous, massive mudstone succession has been extensively studied for its palaeoenvironmental potential. However, its origin and palaeoenvironment remain under debate. The Triassic Mercia mudstone was early proposed to be aeolian loessic clay...
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Determining the location of the Cretaceous-Paleogene (K-Pg) boundary in terrestrial strata is highly significant for studying the evolution of terrestrial ecosystems at the end of the Cretaceous (especially the extinction of non-avian dinosaurs). At present, research on terrestrial K-Pg boundaries worldwide is concentrated in the middle and high la...
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The Cretaceous–Paleogene (K–Pg) boundary interval is an important time interval for deep-time paleoclimatic research, and most records of this interval are derived from marine sections. In this study, we conduct high-resolution magnetic and geochemical analyses in a terrestrial sedimentary succession from the Nanxiong Basin (Southeast China). We co...
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S U M M A R Y The loess from the northern piedmont of the Dabie Mountains is in a transition area between loess from the Chinese Loess Plateau, the Quaternary red soils of southern China and the Xiashu loess. Despite its significant location, the study has been inadequate. In this study, the Guangshan section in the northern piedmont of the Dabie M...
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Previous studies have revealed that magnetic enhancement caused by the pedogenic process often occurs in aerobic soils experiencing low to moderate rainfall, while magnetic reduction caused by iron oxide dissolution often occurs in anaerobic soils experiencing high rainfall. To explore the time required for iron oxide dissolution when the soil cond...
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The Chinese loess has been widely studied in order to reconstruct Cenozoic environmental change. Cretaceous loess-like red beds with alternating red and gray layers in the Lanzhou basin, Northwest China are well preserved and can be used for understanding the Mesozoic environmental and climatic changes. However, the red beds and gray clays are less...
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Laterite is ubiquitous in India and has been extensively studied. However, it is still controversial with respect to its origin, definition, classification, and implications in paleoclimate, tectonic history and topography evolution. Of those, the origin of laterite, either in situ weathering of protoliths or weathering of allochthonous input, is t...
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Miocene strata in the Linxia Basin (Gansu, China) are usually interpreted as lacustrine sediments. However, the red–grey inter-beds known as ‘Zebra layers’ commonly tilt with respect to the terrain on the side slopes of the modern valley, which may be due to mantling palaeotopography (similar to aeolian loess). The anisotropy of magnetic susceptibi...
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Aeolian loess is carried by wind and undergoes pedogenesis after deposition. Therefore, both detrital components from the source region and soil pedogenic components contribute to the magnetic properties of the loess. The pedogenic component can be identified by analyzing the coercivity spectra of loess with different degrees of pedogenesis. We use...
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Shell mounds are the foremost type of Neolithic sites found in coastal areas of South China. These sites can provide significant information on prehistoric human activity and climate change; however, only a few shell mounds have a systematic chronology in South China. In this study, optically stimulated luminescence (OSL) and 14C dating techniques...
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Shell mounds are the foremost type of Neolithic sites found in coastal areas of South China. These sites can provide significant information on prehistoric human activity and climate change; however, only a few shell mounds have a systematic chronology in South China. In this study, optically stimulated luminescence (OSL) and 14C dating techniques...
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S U M M A R Y This study investigates the magnetic mineralogy of palaeosol S5 from Xifeng (XF), Linyou (LY) and Baoji (BJ) sections with increasing annual precipitation from north to the south on the Chinese Loess Plateau. Palaeosol S5 samples from these three localities are further prepared as magnetic extracts and separation residues. Low-tempera...
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Rock magnetism of Chinese loess between room and liquid nitrogen temperatures has been studied. Low temperature saturation remanence and low field susceptibility of loess and palaeosol samples have been measured. In addition room temperature saturation remanence was heated up 650°C in order to obtain information maximum unblocking (Curie) temperatu...
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The climate during the Cretaceous Period represented one of the greenhouse states of Earth's history. Significant transformation of climate patterns and a mass extinction event characterised by the disappearance of dinosaurs occurred across the Cretaceous–Palaeogene boundary. However, most records of this interval are derived from marine sediments....
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The monsoonal paleoclimate of India has been critical for understanding the tectonic history of Himalayan and Tibetan uplift over the past 60 My. Monsoonal circulation in deep time has been inferred from variation in stable isotopes of tooth enamel, diatom blooms, and dust influx in the Indian Ocean and the advent of C4 grasses, but these proxies a...
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The climate during the Cretaceous Period represented one of the greenhouse states of Earth's history. Significant transformation of climate patterns and a mass extinction event characterised by the disappearance of dinosaurs occurred across Cretaceous–Palaeogene boundary. However, most records of this interval are derived from marine sediments. The...
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In this study, we report a tuned astronomical time scale for a sedimentary formation in Early Cretaceous – the lower Linze Section located in the Zhangye Basin of the central Hexi Corridor, northwestern China. Based on detailed field investigations, we identified this sediment as the Xiagou Formation, which is widely distributed in the region. A th...
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Aeolian loess in the Ili Basin is an important geological archive for studying the changes in paleoclimate and sources of dust particles. Size-differentiated rare earth elements (REE) may help to distinguish potential dust sources. This study investigates the size-differentiated REE characteristics from three sites including the Zhaosu loess and th...
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Tree-ring variability of submerged wood specimens in coastal areas provides important clues about sea level change and climate variability of the past. We dated submerged wood samples from coastal Fujian province in China using the radiocarbon methods and investigated their tree-ring variability. The submerged wood samples from the Shenhu Bay that...
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Aeolian loess deposits contain abundant information about the evolution of the paleoenvironment. For example, paleoclimate changes recorded in Chinese loess area obtained significant achievement in the past few decades. Compared to Chinese loess, research on Indian loess is lacking. Currently, most studies focus on the Kashmir area located in the s...
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Red Clay underlying the loess-palaeosol sequences on the Chinese Loess Plateau is an eolian deposit. There is a controversy over whether magnetic susceptibility (χ) variations in Red Clay sequence can be used as an indicator of summer palaeomonsoon intensity. This study investigates the magnetic mineralogy, magnetic concentration and magnetic grain...
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S U M M A R Y Red Clay underlying the loess-palaeosol sequences on the Chinese Loess Plateau is an eo-lian deposit. There is a controversy over whether magnetic susceptibility (χ) variations in Red Clay sequence can be used as an indicator of summer palaeomonsoon intensity. This study investigates the magnetic mineralogy, magnetic concentration and...
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This study was based mainly on environmental magnetic, soil science and geochemical methods to analyze the spatial variation of magnetic characteristics of the S5-1 paleosol (age ~470. Ka) in a NW-SE transect from Xifeng, Linyou and Baoji sections from the Chinese Loess Plateau. The results show that (a) pedogenesis and chemical weathering of the c...
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The geomagnetic polarity reversal rate changes radically from very low to extremely high. Such process indicates fundamental changes in the Earth’s core reorganization and core–mantle boundary heat flow fluctuations. However, we still do not know how critical such changes are to surface geology and climate processes. Our analysis of the geomagnetic...
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Magnetic susceptibility (MS) of aeolian deposits on the Chinese Loess Plateau is high in paleosol and low in loess. The MS of paleosols is mainly enhanced by ferromagnetic minerals formed during post-depositional soil development. In central Alaska aeolian deposits, MS is high in loess and low in paleosol. The wind vigor model has been proposed to...
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Quaternary climate change recorded by Chinese loess closely parallels fluctuations in the benthic δ18O record. However, there are also some unique climate anomalies in and around the Asian inland Chinese Loess Plateau (CLP), where the climate was unusually humid during MIS 3 and 13, and extremely cold during MIS 22 and 38. Most explanations involve...
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Early Miocene paleosols, dated back to 17 Ma BP, are prevalently distributed in the Sydney area, of which laterite strata was previously thought to form in tropic environments with high temperature and humidity. However, the Australia plate did not yet drift to current position during the early Miocene when Sydney paleolatitude was 45°S-50°S, thus...
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The global ice volume change regulates the Earth's climate and has been characterized by 100,000-year cycles over the last 700,000 years. The Asian inland winter climate change is proposed to show primary 100,000-year cycles that mimic ice volume changes. Here we calibrate the age of a high-resolution grain size record over the last 500,000 years w...
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Magnetotactic bacteria (MTB) use passive alignment with the Earth magnetic field as a mean to increase their navigation efficiency in horizontally stratified environments through what is known as magneto-aerotaxis (M-A). Current M-A models have been derived from MTB observations in aqueous environments, where a >80% alignment with inclined magnetic...
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Loess–palaeosol sequences preserve the most significant continental record of climatic and environmental changes during the Quaternary available for scientific study. The Eurasian loess belt in particular could be regarded as one of the most important Quaternary terrestrial records of climatic and environmental changes on a global scale. The Prelim...
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Measurements of magnetic properties and particle size were carried out for dust-storm samples collected from Sydney (Australia) on 23 September 2009 and from Lanzhou (China) on April 2010. The results show that the magnetic mineral content of the Lanzhou sample is much higher than that of the Sydney sample. Magnetite, maghemite and possibly hematit...
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The relationships between magnetic susceptibility and pedogenic development are different in various regions of the world. For example, loess magnetic susceptibility shows a positive correlation with pedogenic development in Chinese Loess Plateau (CLP), while it displays a negative correlation with pedogenesis in Alaska and Siberia. To better under...
Article
In the central Chinese Loess Plateau (CLP), the magnetic susceptibility has the highest value in the S5 paleosol unit. However, at the southern of the CLP, such as in Baoji, the magnetic susceptibility value in the S5 paleosol unit is on the lower range of the top 6 paleosols (S0, S1…S5). The studies of rock magnetism and geochemistry showed that t...
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The development of Asian aridification and cooling is a research hotspot nowadays. Loess-Red Clay sequence in the Chinese Loss Plateau provides an excellent terrestrial archive of such paleoclimatic evolution. This paper applied the magnetic “unmixing” technique to isolate the magnetic components of the Red Clay sequence for the first time. The Jia...
Article
Climate changes are closely related to peoples' livelihoods. Holocene climate changes are therefore particularly important to humans. It is known that eolian loess deposits in China are one of the best geological records for paleoclimatic change. As it is the top layer of loess sequence, Holocene loess may be easily disturbed by human activities. F...
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There are vast dry areas in Australia, but few loess sections have been reported. Mackenzie's Waterholes Creek (MWC) profile in New South Wales was the deepest and first dated loess profile. In this paper, various measurements of magnetic parameters from MWC were carried out and comparison was made with those of Luochuan profile, which lies in the...
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Thermomagnetic measurements including high temperature magnetic susceptibility and high temperature magnetization, are the crucial way to distinguish magnetic minerals by determining the turning points (e.g. Curie point, Neel point or other transforming points) on thermomagnetic curves. In this study, two synthetic maghemite samples are subjected t...
Article
Full-text available
The development of Asian aridification and cooling is a research hotspot nowadays. Loess-Red Clay sequence in the Chinese Loss Plateau provides an excellent terrestrial archive of such paleoclimatic evolution. This paper applied the magnetic "unmixing" technique to isolate the magnetic components of the Red Clay sequence for the first time. The Jia...
Article
Full-text available
This paper reports a loess-paleosol sequence located in the Danube River basin, Serbia, which formed at least since the latest part of the early Pleistocene, and before the paleomagnetic B/M boundary. Various magnetic parameters of the Serbian V-L 1-V-S 4 loess-paleosol sequence have been measured and analyzed in the Titel Loess Plateau. These para...
Article
Loess-paleosol sequences are good archives for research on paleoclimate over the last 2.5 million years and even earlier. Magnetic susceptibility of loess-paleosol sequences has been used extensively as a proxy for paleoclimate interpretations. Magnetic minerals in loess/paleosols are of lithogenic (allochthonous) origin or pedogenic (authigenic) o...
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Full-text available
Climate changes are closely related to peoples' livelihoods. Holocene climate changes are therefore particularly important to humans. It is known that eolian loess deposits in China are one of the best geological records for paleoclimatic change. As it is the top layer of loess sequence, Holocene loess may be easily disturbed by human activities. F...
Article
Full-text available
The magnetic susceptibility of loess from the Ily Basin, northwestern China shows maximum values in S0 paleosols but minimum values in other paleosols, the mechanism of which has been well debated. In this work, systematic magnetic measurements were made on a representative section from Neleke county. The results show that the loess horizons (L1, L...
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Full-text available
The magnetic susceptibility of loess from the Ily Basin, northwestern China shows maximum values in S0 paleosols but minimum values in other paleosols, the mechanism of which has been well debated. In this work, systematic magnetic measurements were made on a representative section from Neleke county. The results show that the loess horizons (L1, L...
Article
We report results obtained from magnetic and geochemical measurements of 71 street dust samples from four distinct districts (residential, commercial and industrial) in Lanzhou, an industrial city in China. Magnetic properties and the concentrations of 17 elements (As, Ba, Bi, Cr, Cu, Mn, Ni, Pb, Ti, Zn, Fe, Si, Na, Mg, K, Ca, Al) are reported for...
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This paper reports a loess-paleosol sequence located in the Danube River basin, Serbia, which formed at least since the latest part of the early Pleistocene, and before the paleomagnetic B/M boundary. Various magnetic parameters of the Serbian V-L1-V-S4 loess-paleosol sequence have been measured and analyzed in the Titel Loess Plateau. These parame...
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The topsoils of the loess region of Tianshan Mountains and Loess Plateau in northwestern China are systematically collected and analysed on their rock magnetism and grain size. Their magnetic characteristics indicate that high magnetic minerals are magnetite and maghemite, and the weakly magnetic minerals are hematite, goethite or lepidocrocite. Th...
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Two geophysical measurements have been widely used as paleoclimatic indicators: oxygen-isotope ratios from deep-sea cores and magnetic susceptibility of loess sediments. Both types of record have been shown to possess climatic information, as they share the same dominant frequencies of the Earth's orbital movements, which, according to Milankovitch...
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Annual and seasonal trends in maximum and minimum temperatures, precipitation and vapour pressure deficit (VPD) were examined with the goal of understanding trends in temperature and moisture across the Tibetan Plateau, using meteorological data (1971–2005) collected at 63 stations. Trends in pan evaporation (PE; 1971–2001, 68 stations) and runoff...