The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Shifeng Dai - One of the best experts on this subject based on the ideXlab platform.
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concentration and distribution of elements in late permian coals from western Guizhou Province china
International Journal of Coal Geology, 2005Co-Authors: Shifeng Dai, Deyi Ren, Yuegang Tang, Mei Yue, Liming HaoAbstract:Abstract With the aim of better understanding geochemistry of coal, 71 Late Permian whole-seam coal channel samples from western Guizhou Province, Southwest China were studied and 57 elements in them were determined. The contents of Al, Ca, Co, Cr, Cu, Fe, Ga, Hf, K, Li, Mn, Mo, Nb, Ni, Sn, Ta, Ti, Th, U, V, Zr, and REEs in the Late Permian coals from western Guizhou Province are higher than the arithmetic means for the corresponding elements in the US coals, whereas As, Ba, Br, F, Hg, P, Se, and Tl are lower. Compared to common Chinese coals, the contents of Co, Cr, Cu, Ga, Hf, Li, Mn, Mo, Ni, Sc, Sn, Ti, U, V, Zn, and Zr in western Guizhou coals are higher, and As, F, Hg, Rb, Sb, Tl, and W are lower. Five groups of elements may be classified according to their mode of occurrence in coal: The first two, Group A, Tm–Yb–Lu–Y–Er–Ho–Dy–Tb–Ce–La–Nd–Pr–Gd–Sm, and Group B, As–Sr–K–Rb–Ba–F–Ash–Si–Sn–Ga–Hf–Al–Ta–Zr–Be–Th–Na, have high positive correlation coefficients with ash yield and they show mainly inorganic affinity. Some elements from Group B, such as Ba, Be, Ga, Hf, and Th, are also characterized by significant aluminosilicate affinity. In addition, arsenic also exhibits high sulfide affinity ( r S–Fe >0.5). The elements, which have negative or lower positive correlation coefficients with ash yield (with exceptions of Bi, Cs, Nb, Mn, Se, and Ti), are grouped in other four associations: Group C, Cr–V–Mo–U–Cd–Tl; Group D, Hg–Li–Sc–Ti–Eu–Nb–Cs–W; Group E, Bi–Sb; and Group F, Co–Ni–Cu–Pb–Zn–Mg–Se–Ca–Mn–S–Fe. The correlation coefficients of some elements, including Co, Cr, Cu, Fe, Hg, Li, Mo, Ni, P, S, Sc, U, V, and Zn, with ash yield are below the statistically significant value. Only Cr and Cu are negatively correlated to ash yield (−0.07 and −0.01, respectively), showing intermediate (organic and inorganic) affinity. Manganese and Fe are characterized by carbonate affinity probably due to high content of epigenetic veined ankerite in some coals. Phosphorus has low correlation coefficients with any other elements and is not included in these six associations. There are five possible genetic types of enrichment of elements in coal from western Guizhou Province: source rock, volcanic ash, low-temperature hydrothermal fluid, groundwater, and magmatic hydrothermal inputs.
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the cause of endemic fluorosis in western Guizhou Province southwest china
Fuel, 2004Co-Authors: Shifeng Dai, Deyi RenAbstract:The endemic fluorosis in western Guizhou Province, southwest China is usually attributed to a high-fluorine content in Late Permian coals. This study found that the average fluorine content in 50 coal channel samples from western Guizhou Province ranges from 16.6 to 500 μg/g, with an average of 83.1 μg/g, which is close to the world average (80 μg/g) and that of Chinese coals (82 μg/g). Additionally, the fluorine content of drinking water and fresh corn is too low to lead to fluorosis in western Guizhou Province. However, the clay used as an additive for coal-burning and as a binder in briquette-making by local residents has a very high content of fluorine, ranging from 100.8 to 2455.7 μg/g, with an average of 1027.6 μg/g. The endemic fluorosis is likely caused by fluorine in the clay. Therefore, in areas where unhealthy traditional coal-burning habits and customs are kept and furnaces without chimneys are used, the more clay used for a coal-burning additive and as a binder for briquettes, the more serious the fluorosis problem is.
Lihai Shang - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric Mercury Emissions from Residential Coal Combustion in Guizhou Province, Southwest China
2019Co-Authors: Zikang Cui, Xinbin Feng, Lihai Shang, Yanzhe Zhang, Xuefeng Wang, Leiming Zhang, Zuxiu YaoAbstract:Coal combustion has represented a very important atmospheric mercury (Hg) source in the past 5 decades, especially in eastern Asia. Compared with coal-fired power plants (CFPPs) and industrial boilers, Hg emissions from the residential sector have not drawn much attention. In this study, two field campaigns were carried out to quantify Hg emission ratios and Hg speciation discharged into the ambient atmosphere from residential coal combustion (RCC) in Guizhou Province, Southwest China. The average Hg emission ratio, based on the mass balance calculation from coal samples collected in 27 families, was estimated to be 99.6%, higher than those found in the majority of the previous studies (52.0–99.8%). Total Hg in the exhausted flue gas from five families in different areas in Guizhou ranged from 5.4 to 18.5 μg/m3 and was mainly affected by the Hg contents in the fuel (lump coal or briquette coal). Hg species in the flue gas from RCC were measured on site for the first time, indicating Hg in the exhausted flue gas was dominated by Hg0 (91.2 ± 3.8%) rather than Hg2+ (7.6 ± 3.5%) or Hg(p) (1.2 ± 1.7%), despite different coal types with different associated Hg contents being used in different families. Such a finding is very different from a previous assumption that Hg(p) is the dominant emitted species. The total Hg emissions from RCC in Guizhou were estimated to be 48.9 Mg (106 g) between 1990 and 2016, with annual emission amount of 1.2–2.3 Mg Hg/year. The annual Hg emission amounts from RCC were likely more than double of those emitted from CFPPs in this Province in the more recent years, indicating the necessity of better quantifying this source sector and setting stricter emission control measures
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atmospheric mercury species measured in guiyang Guizhou Province southwest china
Atmospheric Research, 2011Co-Authors: Na Liu, Xinbin Feng, Guangle Qiu, Matthew S Landis, Lihai ShangAbstract:Abstract Atmospheric mercury (Hg) species were measured in Guiyang City, the capital of Guizhou Province, southwestern China at the Guiyang Monitoring Station Agency (GMSA) from September to November 2008 and at the Institute of Geochemistry, Chinese Academy of Sciences (IGCAS) during February, May, and July, 2009. Monitoring results found elevated concentrations of all three Hg species in ambient air in Guiyang. Large temporal and spatial variation patterns in the resulting data were also obtained. The overall average TGM concentrations at the GMSA and IGCAS sampling sites were 7.4 ± 4.8 ng m− 3 and 6.2 ± 5.1 ng m− 3, respectively. The average Hg(p) and RGM concentrations at GMSA were 1330 pg m− 3 and 24 pg m− 3, and at IGCAS were 250 pg m− 3 and 19 pg m− 3, respectively. It is hypothesized that local anthropogenic sources and the seasonal variability result in the high degree of spatial and temporal variability.
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mercury distribution and speciation in water and fish from abandoned hg mines in wanshan Guizhou Province china
Science of The Total Environment, 2009Co-Authors: Guangle Qiu, Xinbin Feng, Shaofeng Wang, Lihai ShangAbstract:Concentrations of total mercury (Hg-T), methylmercury (MeHg), and its speciation in water samples as well as fish collected from abandoned Hg mines in Wanshan, Guizhou Province, China, were measured to show regional dispersion of Hg contaminations that are not well known. High Hg-T and MeHgT (total methylmercury) concentrations obtained in waters from mining areas, ranged from 15 to 9300 ng/l and 0.31 to 25 ng/l, respectively. MeHgT were not correlated with Hg-T, whereas, peak values in both cases were in accord with high concentrations of particulate fraction, which appeared to be enhanced during high-flow regime with ratios reaching to 99%. Elevated Hg concentrations in the particulate form indicated that particles released from Hg mining tailings (calcines) might be an important pathway of Hg to the aquatic system. The concentrations of total Hg in fish muscle were elevated ranging from 0.061 to 0.68 mg/kg, but MeHg were generally low ranging from 0.024 to 0.098 mg/kg with a mean ratio of 28%. The concentrations and distribution patterns of Hg in aquatic systems suggested derivation from historic Hg mining sites in the Wanshan area. (C) 2009 Elsevier B.V. All rights reserved.
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atmospheric mercury emission from artisanal mercury mining in Guizhou Province southwestern china
Atmospheric Environment, 2009Co-Authors: Xinbin Feng, Guangle Qiu, Lihai Shang, Shaofeng Wang, Bo MengAbstract:Mercury (Hg) mining is an important anthropogenic source of atmospheric Hg emissions. The Guizhou Province in Southwestern China is a region with extensive artisanal mercury mining (AMM), but little Hg emission data from this area is available. Using a mass balance method, we estimated emission factors from artisanal mercury mining in Wuchuan mercury mining area (WMMA) and Gouxi area (GX). Average emission factors were 18.2% in WMMA (ranging from 6.9% to 32.1%) and 9.8% in GX (ranging from 6.6% to 14.5%), respectively, which were 2.2–36.4 times higher than the literature values used to estimate Hg emission from Hg mining. Furthermore, the average Hg emission factor of AMM in WMMA was much higher than that in GX, indicating that double condensation processes practiced in GX resulted in higher recoveries and lower emission factors compared to single condensation process applied in WMMA. Atmospheric Hg emission was estimated to be 3.7–9.6 metric tons in 2004 for WMMA and 1.3–2.7 metric tons in 2006 for GX, indicating artisanal Hg mining was an important atmospheric Hg emission source in the study area.
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the variations of mercury in sediment profiles from a historically mercury contaminated reservoir Guizhou Province china
Science of The Total Environment, 2008Co-Authors: Haiyu Yan, Xinbin Feng, Guangle Qiu, Lihai Shang, Shaofeng Wang, Qianjin Dai, Yamin HouAbstract:Abstract Baihua Reservoir in Guizhou Province, China, experienced serious Hg contamination from Guizhou Organic Chemical Plant (GOCP) between 1971 and 1997. However, the biogeochemical cycling of Hg in this reservoir is not well studied. Sediment cores were collected in fall 2002, spring 2003 and in spring and fall 2004. THg and MeHg concentrations in all sediment profiles ranged from 0.26 to 38.9 mg/kg and from 0.5 to 27.5 μg/kg (d.w.), respectively. The distribution of THg in sediment cores was characterized by a few peaks, which may correspond to the Hg-containing wastewater discharge history of the GOCP. The average THg concentrations in sediments cores decreased from upstream to downstream due to the deposition of particulate Hg, which is the major form of Hg in water. THg and MeHg concentrations in pore water varied from 6.1 to 5860 ng/L and from 0.3 to 15.4 ng/L, respectively, which were significantly higher than levels in the overlying water column. Average diffusive flux from sediment to water is 1642 and 36 ng/m 2 /day for THg and MeHg. The spatial distribution of THg in pore water from upstream to downstream showed the same trend as the sediment, but MeHg in pore water did not show a declining pattern with distance from the GOCP. These results suggested that sediments experienced serious contamination of Hg, and the contaminated sediment is an important Hg contamination source to the overlying water.
Xinbin Feng - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric Mercury Emissions from Residential Coal Combustion in Guizhou Province, Southwest China
2019Co-Authors: Zikang Cui, Xinbin Feng, Lihai Shang, Yanzhe Zhang, Xuefeng Wang, Leiming Zhang, Zuxiu YaoAbstract:Coal combustion has represented a very important atmospheric mercury (Hg) source in the past 5 decades, especially in eastern Asia. Compared with coal-fired power plants (CFPPs) and industrial boilers, Hg emissions from the residential sector have not drawn much attention. In this study, two field campaigns were carried out to quantify Hg emission ratios and Hg speciation discharged into the ambient atmosphere from residential coal combustion (RCC) in Guizhou Province, Southwest China. The average Hg emission ratio, based on the mass balance calculation from coal samples collected in 27 families, was estimated to be 99.6%, higher than those found in the majority of the previous studies (52.0–99.8%). Total Hg in the exhausted flue gas from five families in different areas in Guizhou ranged from 5.4 to 18.5 μg/m3 and was mainly affected by the Hg contents in the fuel (lump coal or briquette coal). Hg species in the flue gas from RCC were measured on site for the first time, indicating Hg in the exhausted flue gas was dominated by Hg0 (91.2 ± 3.8%) rather than Hg2+ (7.6 ± 3.5%) or Hg(p) (1.2 ± 1.7%), despite different coal types with different associated Hg contents being used in different families. Such a finding is very different from a previous assumption that Hg(p) is the dominant emitted species. The total Hg emissions from RCC in Guizhou were estimated to be 48.9 Mg (106 g) between 1990 and 2016, with annual emission amount of 1.2–2.3 Mg Hg/year. The annual Hg emission amounts from RCC were likely more than double of those emitted from CFPPs in this Province in the more recent years, indicating the necessity of better quantifying this source sector and setting stricter emission control measures
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environmental geochemistry of an abandoned mercury mine in yanwuping Guizhou Province china
Environmental Research, 2013Co-Authors: Guangle Qiu, Xinbin Feng, Bo Meng, Chao Zhang, Yan LinAbstract:Abstract The distribution of mercury (Hg) and methylmercury (MeHg) in paddy soil and rice grain (polished), and Hg in surface waters and gaseous elemental Hg (GEM) in atmosphere at the Yanwuping Hg mining district (YMM), Guizhou Province, China was investigated. Results exhibited high total Hg (Hg T ) and MeHg concentrations in soil at sites adjacent to calcine pile and tailings, and ranged from 5.6 to 240 mg kg −1 and 0.66 to 7.3 μg kg −1 , respectively. Concentrations of Hg T in rice ranged from 10 to 45 μg kg −1 , and high MeHg concentrations were also observed ranging from 3.2 to 39 μg kg −1 . The elevated Hg T and MeHg concentrations in soil in the vicinity of calcine pile and tailings reflected in high MeHg concentrations in rice. Those data were significantly correlated with MeHg concentration in soil confirming that soil is the major source of MeHg in rice. The highest Hg concentrations in water, otherwise rather low, ranging from 3.8 to 51 ng l −1 for Hg T and of 0.14 to 2.7 ng l −1 for MeHg T , were found at the proximity of calcine pile suggesting that untreated mine wastes are the principal source of Hg in the nearby area. Huge emissions of GEM were also detected from calcines affecting the whole area, ranging from 12 to 180 ng m −3 with an average of 46±35 ng m −3 . The distribution patterns of Hg and MeHg observed in the environmental compartments suggest an elevated contamination of Hg in the region. Elevated high MeHg concentrations in rice might pose a potential health risk to local populations.
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mercury isotope variations in surface soils in different contaminated areas in Guizhou Province china
Chinese Science Bulletin, 2013Co-Authors: Xinbin Feng, Runsheng YinAbstract:Guizhou Province is known as a heavily Hg-polluted area in China due to its special geochemical background and complicated Hg emission sources. In this study, we investigated the Hg isotope compositions of surface soil samples in the Hg mining area, zinc smelting area, coal combustion area, which are known to be the typical pollution regions of Hg in this Province. We also compared the Hg isotopic fingerprints of primary Hg sources, such as hydrothermal Hg-bearing ores, coals and atmospheric Hg samples. According to our study, Hg stored in surface soils in different pollution regions in Guizhou Province displays a wide range of both mass dependent fractionation (MDF, δ202Hg) and mass independent fractionation (MIF, Δ199Hg). δ202Hg varies by 2.0‰ and Δ199Hg varies by 0.25‰ in the investigated surface soils. This study demonstrated that using a “MDF-MIF” two dimensional Hg isotope system could be particularly useful in discriminating Hg sources in soils.
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atmospheric mercury species measured in guiyang Guizhou Province southwest china
Atmospheric Research, 2011Co-Authors: Na Liu, Xinbin Feng, Guangle Qiu, Matthew S Landis, Lihai ShangAbstract:Abstract Atmospheric mercury (Hg) species were measured in Guiyang City, the capital of Guizhou Province, southwestern China at the Guiyang Monitoring Station Agency (GMSA) from September to November 2008 and at the Institute of Geochemistry, Chinese Academy of Sciences (IGCAS) during February, May, and July, 2009. Monitoring results found elevated concentrations of all three Hg species in ambient air in Guiyang. Large temporal and spatial variation patterns in the resulting data were also obtained. The overall average TGM concentrations at the GMSA and IGCAS sampling sites were 7.4 ± 4.8 ng m− 3 and 6.2 ± 5.1 ng m− 3, respectively. The average Hg(p) and RGM concentrations at GMSA were 1330 pg m− 3 and 24 pg m− 3, and at IGCAS were 250 pg m− 3 and 19 pg m− 3, respectively. It is hypothesized that local anthropogenic sources and the seasonal variability result in the high degree of spatial and temporal variability.
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mercury distribution and speciation in water and fish from abandoned hg mines in wanshan Guizhou Province china
Science of The Total Environment, 2009Co-Authors: Guangle Qiu, Xinbin Feng, Shaofeng Wang, Lihai ShangAbstract:Concentrations of total mercury (Hg-T), methylmercury (MeHg), and its speciation in water samples as well as fish collected from abandoned Hg mines in Wanshan, Guizhou Province, China, were measured to show regional dispersion of Hg contaminations that are not well known. High Hg-T and MeHgT (total methylmercury) concentrations obtained in waters from mining areas, ranged from 15 to 9300 ng/l and 0.31 to 25 ng/l, respectively. MeHgT were not correlated with Hg-T, whereas, peak values in both cases were in accord with high concentrations of particulate fraction, which appeared to be enhanced during high-flow regime with ratios reaching to 99%. Elevated Hg concentrations in the particulate form indicated that particles released from Hg mining tailings (calcines) might be an important pathway of Hg to the aquatic system. The concentrations of total Hg in fish muscle were elevated ranging from 0.061 to 0.68 mg/kg, but MeHg were generally low ranging from 0.024 to 0.098 mg/kg with a mean ratio of 28%. The concentrations and distribution patterns of Hg in aquatic systems suggested derivation from historic Hg mining sites in the Wanshan area. (C) 2009 Elsevier B.V. All rights reserved.
Deyi Ren - One of the best experts on this subject based on the ideXlab platform.
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concentration and distribution of elements in late permian coals from western Guizhou Province china
International Journal of Coal Geology, 2005Co-Authors: Shifeng Dai, Deyi Ren, Yuegang Tang, Mei Yue, Liming HaoAbstract:Abstract With the aim of better understanding geochemistry of coal, 71 Late Permian whole-seam coal channel samples from western Guizhou Province, Southwest China were studied and 57 elements in them were determined. The contents of Al, Ca, Co, Cr, Cu, Fe, Ga, Hf, K, Li, Mn, Mo, Nb, Ni, Sn, Ta, Ti, Th, U, V, Zr, and REEs in the Late Permian coals from western Guizhou Province are higher than the arithmetic means for the corresponding elements in the US coals, whereas As, Ba, Br, F, Hg, P, Se, and Tl are lower. Compared to common Chinese coals, the contents of Co, Cr, Cu, Ga, Hf, Li, Mn, Mo, Ni, Sc, Sn, Ti, U, V, Zn, and Zr in western Guizhou coals are higher, and As, F, Hg, Rb, Sb, Tl, and W are lower. Five groups of elements may be classified according to their mode of occurrence in coal: The first two, Group A, Tm–Yb–Lu–Y–Er–Ho–Dy–Tb–Ce–La–Nd–Pr–Gd–Sm, and Group B, As–Sr–K–Rb–Ba–F–Ash–Si–Sn–Ga–Hf–Al–Ta–Zr–Be–Th–Na, have high positive correlation coefficients with ash yield and they show mainly inorganic affinity. Some elements from Group B, such as Ba, Be, Ga, Hf, and Th, are also characterized by significant aluminosilicate affinity. In addition, arsenic also exhibits high sulfide affinity ( r S–Fe >0.5). The elements, which have negative or lower positive correlation coefficients with ash yield (with exceptions of Bi, Cs, Nb, Mn, Se, and Ti), are grouped in other four associations: Group C, Cr–V–Mo–U–Cd–Tl; Group D, Hg–Li–Sc–Ti–Eu–Nb–Cs–W; Group E, Bi–Sb; and Group F, Co–Ni–Cu–Pb–Zn–Mg–Se–Ca–Mn–S–Fe. The correlation coefficients of some elements, including Co, Cr, Cu, Fe, Hg, Li, Mo, Ni, P, S, Sc, U, V, and Zn, with ash yield are below the statistically significant value. Only Cr and Cu are negatively correlated to ash yield (−0.07 and −0.01, respectively), showing intermediate (organic and inorganic) affinity. Manganese and Fe are characterized by carbonate affinity probably due to high content of epigenetic veined ankerite in some coals. Phosphorus has low correlation coefficients with any other elements and is not included in these six associations. There are five possible genetic types of enrichment of elements in coal from western Guizhou Province: source rock, volcanic ash, low-temperature hydrothermal fluid, groundwater, and magmatic hydrothermal inputs.
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the cause of endemic fluorosis in western Guizhou Province southwest china
Fuel, 2004Co-Authors: Shifeng Dai, Deyi RenAbstract:The endemic fluorosis in western Guizhou Province, southwest China is usually attributed to a high-fluorine content in Late Permian coals. This study found that the average fluorine content in 50 coal channel samples from western Guizhou Province ranges from 16.6 to 500 μg/g, with an average of 83.1 μg/g, which is close to the world average (80 μg/g) and that of Chinese coals (82 μg/g). Additionally, the fluorine content of drinking water and fresh corn is too low to lead to fluorosis in western Guizhou Province. However, the clay used as an additive for coal-burning and as a binder in briquette-making by local residents has a very high content of fluorine, ranging from 100.8 to 2455.7 μg/g, with an average of 1027.6 μg/g. The endemic fluorosis is likely caused by fluorine in the clay. Therefore, in areas where unhealthy traditional coal-burning habits and customs are kept and furnaces without chimneys are used, the more clay used for a coal-burning additive and as a binder for briquettes, the more serious the fluorosis problem is.
Jin Peng - One of the best experts on this subject based on the ideXlab platform.
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kailidiscus a new plesiomorphic edrioasteroid from the basal middle cambrian kaili biota of Guizhou Province china
Journal of Paleontology, 2010Co-Authors: Yuanlong Zhao, Ronald L Parsley, Colin D Sumrall, Jin PengAbstract:A new genus and species of edrioasteroid grade echinoderm, Kailidiscus chinensis, is described from the Kaili Biota of the basal lower Middle Cambrian Kaili Formation from Guizhou Province, China. This echinoderm has a strong resemblance to isorophid edrioasteroids, bearing a well-developed peripheral rim, long curved ambulacra, and slightly imbricate interambulacral plating at maturity. However, the presence of pore-bearing, double biserial floor plates, tiered cover plates, lack of radially positioned oral frame plates, and unincorporated hydropore/gonopore are unknown in isorophids. Many of these features bear strong resemblance to eocrinoids and helicoplacoids, attesting to the plesiomorphic nature of this taxon. Despite the obvious anatomical differences, specimens of this species preserve a complete ontogeny that resembles that of isorophids. Juveniles show a discoidal theca with straight ambulacra that transitions to an inflated theca with strongly curved ambulacra with maturity.
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new data regarding acritarch biostratigraphy from the early middle cambrian kaili formation in chuandong Guizhou Province china
Progress in Natural Science, 2009Co-Authors: Leiming Yin, Ruidong Yang, Jin Peng, Fanfan KongAbstract:Abstract Previous studies had evaluated acritarchs from the Balang and Pingzhai sections of the Early-Middle Cambrian Kaili Formation in east Guizhou, China. The results of these studies suggest that the acritarchs in these sections have potential biostratigraphic significance. More recently, 34 samples collected from 83 m lower part of the Lower-Middle Cambrian Kaili Formation in the Jianshan section of Chuandong, Guizhou Province were prepared for palynological analysis. Analysis of these samples revealed a distinct change in the acritarch assemblages at the bed, which was approximately 46 m above the bottom of the Kaili Formation. These findings suggest a boundary represented by an important alteration of the ecological environment. In addition, the position of the acritarch biostratigraphic change is somewhat higher than the boundary between Cambrian Series 2 and Series 3 based on trilobites found in the same section. This indicates that the distinct change in acritarch assemblages is similar to the change in trilobite assemblages that occurs around the boundary between Cambrian Series 2 and Series 3. Therefore, acritarch biostratigraphy can provide data that can be used to define the base of Cambrian Series 3 in this region, and possibly worldwide.
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basal middle cambrian short stalked eocrinoids from the kaili biota Guizhou Province china
Journal of Paleontology, 2008Co-Authors: Yuanlong Zhao, Ronald L Parsley, Jin PengAbstract:Gogiid eocrinoids (Echinodermata) are the most abundant coelomate invertebrates in the Middle Cambrian (Taijiangian) Kaili Biota, Taijiang County, Guizhou Province, China. Both long- and short-stalked taxa are represented. The short-stalked Globoeocrinus globulus n. gen. and sp. has a globular theca, with well-developed sutural pores on all thecal plates in older mature specimens, short, thick stalk composed of small polygonal to rounded platelets, a large flattened attachment disc, and up to ten long, thin, helically coiled brachioles with tall, pointed cover plates. Some younger mature specimens have varying patches of non-pored plates that usually occur on the upper (probably) posterior portion of the theca. This species is over three times more abundant than the other co-occurring long-stalked gogiid Sinoeocrinus lui Zhao, Huang and Gong, 1994. Most specimens of G. globulus (ca. 80%) attach to acrotretid brachiopods, trilobite exuviae, or other skeletal remains. They are also capable of attaching directly to the seafloor.
