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| 1 | 云南宣威晚二叠世末生物灭绝期C1煤的地球化学特征显示文摘云南宣威雁塘煤矿晚二叠世末期C1煤层蕴含了二叠纪—三叠纪界线事件演化以及宣威肺癌高发原因方面的重要信息。本文对该矿C1煤层(包括三个分层——B1、B2和B3)进行了刻槽分层采样,采用X射线荧光光谱和电感耦合等离子体质谱测试了24个样品中常量和微量元素。利用偏光显微镜和带能谱的扫描电镜(SEMEDX)对煤中的显微组分及矿物组成进行微区分析,利用X射线衍射对低温灰化后的煤样作了矿物的半定量分析。结果表明,雁塘矿C1煤中常量元素Ca、Mn、Si含量明显高于中国煤均值;与华南二叠纪煤平均值、中国煤平均值、世界煤平均值以及地壳元素丰度相比较,雁塘矿C1煤中的W、Co、Mo、Cd、Pb、Be、Sb、Cu、Ni、Zn、Zr和V等12种微量元素相对比较富集。结合相关分析和SEM-EDX微区分析方法,对C1煤中微量元素的赋存状态进行分析发现Cs、Ga、Nb、Ba、Rb、Th、Tl、U与灰分显著正相关,表明这些元素主要以无机矿物态赋存,其它元素赋存状态复杂。结合C1煤中12种富集元素在垂向上的含量分布特征,推断Co、Cu、V、Zn应主要来源于峨眉山玄武岩风化产物;Be和Zr主要受同沉积火山灰影响;Ni则可能受峨眉山玄武岩风化及同沉积火山灰的共同影响;同沉积火山灰是C1煤中W来源之一;Sb可能受中低温热液的影响。C1煤中Zr与我国南方其他地区P/T界线粘土岩中Zr的富集规律一致。C1煤中富集的微量元素与宣威肺癌高发区可吸入颗粒物中的高含量元素一致,推断C1煤的燃烧可能与宣威肺癌高发有关。C1煤中富集的有毒有害微量元素可能与二叠纪—三叠纪之交生物大灭绝期的独特环境有密切关系。 | 邵龙义 王娟 侯海海 张名泉 汪浩 SPIRO Baruch LARGE David 周义平 | 2015 | 地质学报2015，89，1： | 17 |
| 2 | SHRIMP zircon U-Pb ages from coal beds across the Permian-Triassic boundary, eastern Yunnan, southwestern China显示文摘The first SHRIMP zircon U e Pb ages from coal beds close to the end-Permian mass extinction are reported from the C_1 coal seam in the Yantang Mine in Laibin Town, Xuanwei County, eastern Yunnan Province.Zircons were extracted from kaolinite claystone layers, defined as tonsteins(volcanic ash deposits), in the subseam B_1 and B_3 of the coal seam C_1.The U-Pb ages are 252.0 ± 2.3 Ma and 250.3 ± 2.1 Ma for the sub-seam B_1 and B_3, respectively. Within analytical uncertainties, these U-Pb ages include the time period of the onset of the mass extinction at 251.941 ± 0.037 Ma, which was obtained from the marine Meishan section in Zhejiang Province, ~1600 km away from the Yantang Mine. These new ages represent not only the first and closest ages to the PTB mass extinction in terrestrial coal beds, but also ages from the nearest site to the Emeishan volcanoes investigated so far. Therefore these new data provide the most accurate stratigraphic horizon of terrestrial facies of the end-Permian extinction in South China. The Emeishan volcanoes were likely the source of volcanic ash in the coal seams at the Xuanwei County and broader areas in South China. Furthermore, the minerals and geochemistry characteristics of the C_1 coal seam also implied the influences of contemporaneous volcanic activities. | Juan Wang Long-Yi Shao Hao Wang Baruch Spiro David Large | 2018 | Journal of Palaeogeography2018，7，2： | 4 |
| 3 | Lacustrine basin evolution and coal accumulation of the Middle Jurassic in the Saishiteng coalfield, northern Qaidam Basin, China显示文摘Based on an extensive borehole survey of the Middle Jurassic coal-bearing sequences in the Saishiteng coalfield,northern Qaidam Basin(NQB),a total of 20 rock types and 5 sedimentary facies were identified,including braided river,meandering river,braided delta,meandering river delta,and lacustrine facies.The distribution of rock types and sedimentary facies contributed to the reconstruction of three periods' sedimentary facies maps of the Middle Jurassic in the Saishiteng coalfield,namely,the Dameigou age,the early Shimengou age and the late Shimengou age.That also provided the basis for the development of a three-stage depositional model of the Middle Jurassic in the NQB,indicating the lacustrine basin of the NQB in the Dameigou age and early Shimengou age were corresponding to an overfill basin,and that in the late Shimengou age was related to a balanced-fill basin.The analysis of the stability and structure of coal seams based on sedimentary facies maps showed that the preferred coal-forming facies in the Saishiteng coalfield were inter-delta bay and interdistributary bay of lower delta plain in the Dameigou age.In particular,the swamps that developed on the subaqueous palaeohigh favored the development of thick coal seams.Thus,minable coal seams may also be found along the Pingtai palaeohigh in the western part of the Saishiteng coalfield. | Meng Li Long- Yi Shao Lei Liu Jing Lu Baruch Spiro Huai-Jun Wen Yong-Hong Li | 2016 | Journal of Palaeogeography2016，5，3： | 2 |
| 4 | Controls on trace element (Sr–Mg) compositions of carbonate cave waters: implications for speleothem climatic records显示文摘 | Ian J Fairchild Andrea Borsato Anna F Tooth Silvia Frisia Christopher J Hawkesworth Yiming Huang Frank McDermott Baruch Spiro | 2000 | Chemical Geology2000，，3： | 2 |
| 5 | The inorganic geochemistry of a peat deposit on the eastern Qinghai-Tibetan Plateau and insights into changing atmospheric circulation in central Asia during the Holocene显示文摘 | Marion Ferrat Dominik J. Weiss Baruch Spiro David Large | 2012 | Geochimica et Cosmochimica Acta2012，，： | 2 |
| 6 | Using geophysical logs to identify Milankovitch cycles and to calculate net primary productivity(NPP) of the Late Permian coals,western Guizhou,China显示文摘Milankovitch periodicities of 123 kyr(eccentricity), 35.6 kyr(obliquity), and 21.2 kyr(precession) were identified in geophysical logs of three Late Permian coals: 17#, 18#, and 17 + 18#, from the Songhe mining area in western Guizhou Province. Based on the astronomic temporal framework, the periods of deposition of the 17#(5.6 m), 18#(6.4 m), and 17 + 18#(5.4 m) coals were constrained to 140.8–119.8 kyr, 160–136.2 kyr, and 135–114.9 kyr,respectively. The overall depositional period of the 18# coal of 160–136.2 kyr was further subdivided using the wavelet analysis method, into short and precise periods corresponding to the Milankovitch periodicities. It includes one eccentricity periodicity(123 kyr), three obliquity periodicities(35.6 kyr), and five precession periodicities(21.2 kyr). Different thicknesses of the subdivided coal sections, equivalent to the same time span of deposition, indicate different rates of coal deposition, i.e., thicker sections imply higher rates while the thinner sections represent lower rates. The combination of the measured average carbon concentration with the density of the coals gave rise to long-term average values of carbon accumulation rates for the Late Permian coals, in the range of 42.4–50.6 g?C?m^(-2)?a^(-1). This range corresponds to the long-term average carbon accumulation rates for the initial peat in the range of 60.6–72.3 g?C?m^(-2)?a^(-1). Based on the known quantitative relation between net primary productivity(NPP)values and long-term average carbon accumulation rates for the Holocene tropical peatlands, the range of NPP values for the Late Permian tropical peatlands was estimated as 242.4–433.8 g?C?m^(-2)?a^(-1).A comparison of existing information about peatland NPP levels of various ages and latitudes indicated that when conditions of high rain and high humidity prevail in the palaeo-peatland at given latitude, the NPP rates will vary with changes in atmospheric concentration of CO_2 and O_2. This relationship may lead to the use of coals as an indicator for the concentration of these gases(CO_2 and O_2) in the contemporaneous atmosphere encompassing the long records of coal deposition. | Zhi-Ming Yan Long-Yi Shao David Large Hao Wang Baruch Spiro | 2019 | Journal of Palaeogeography2019，8，1： | 2 |
| 7 | 滇东弥勒盆地褐煤的矿物质特征:内陆盆地泥炭堆积过程中海水输入的新证据显示文摘运用X射线衍射仪(XRD)、X射线荧光光谱仪(XRF)、电感耦合等离子体质谱仪(ICP-MS)以及Triton Plus质谱分析技术,对云南弥勒内陆盆地中新世褐煤中的矿物和元素组成以及锶同位素进行了分析,发现了在陆相煤盆地泥炭堆积过程中海水入侵的新证据。除了煤中高度富集的自生石膏的锶同位素比值;Sr/;Sr与同时期海水中的锶同位素比值一致以外,石膏和自生黄铁矿的赋存状态也表明泥炭在堆积过程中受到了海水输入的影响。指示沉积环境的敏感元素对Ca/Mg, Sr/Ba, Th/U,V/Ni的质量分数比,以及P;O;的质量分数、稀土元素La和Gd正异常、Y/Ho质量分数比变化特征,均表明海水的入侵,并且随着泥炭的堆积,海水的影响逐渐减弱,而淡水的影响和陆源碎屑的供给逐渐增强。在泥炭堆积期间,弥勒盆地处于多期活动阶段的断裂带变形区内,该盆地通过哀牢山—红河断裂与特提斯海相连接,为海水输入至陆地泥炭堆积地提供了通道;与此同时,哀牢山—红河断裂带北部区域抬升,使弥勒盆地泥炭堆积时受到的海水影响随之减小。 | 刘晶晶 代世峰 SPIRO Baruch F 宋晓林 魏建朋 | 2021 | 煤炭学报2021，46，12： | 1 |
| 8 | Identification of Milankovitch Cycles and Calculation of Net Primary Productivity of Paleo-peatlands using Geophysical Logs of Coal Seams显示文摘Individual coal seams formed in paleo-peatlands represent sustained periods of terrestrial carbon accumulation and a key environmental indicator attributed to this record is the rate of carbon accumulation.Determining the rate of carbon accumulation requires a measure of time contained within the coal.This study aimed to determine this rate via the identification of Milankovitch orbital cycles in the coals.The geophysical log is an ideal paleoclimate proxy and has been widely used in the study of sedimentary records using spectral analysis.Spectral analyses of geophysical log from thick coal seams can be used to identify the Milankovitch cycles and to calculate the period of the coal deposition.By considering the carbon loss during coalification,the long-term average carbon accumulation rate and net primary productivity(NPP)of paleo-peatlands in coal seams can be obtained.This review paper presents the procedures of analysis,assessment of results and interpretation of geophysical logs in determining the NPP of paleo-peatlands. | SHAO Longyi WEN He GAO Xiangyu Baruch SPIRO WANG Xuetian YAN Zhiming David J.LARGE | 2022 | Acta Geologica Sinica(English Edition)2022，96，6： | 1 |
| 9 | Lead isotopes in lacustrine sediments and lichen transplants, contrasting and complimentary indicators of sources显示文摘 | Baruch Spiro Dominik J. Weiss Valery Udachin Ben J. Williamson O. William Purvis Richard M Herrington Svetlana Tessalina | 2006 | Chinese Journal Of Geochemistry2006，25，B08： | 0 |
| 10 | The distribution of trace elements and Sr isotopes across the coal and its partings in the Wyodak sea, Powder River Basin, Wyoming, USA显示文摘 | Baruch F. Spiro Margaret Gomnge David J Large Chris Somerfield | 2006 | Chinese Journal Of Geochemistry2006，25，B08： | 0 |
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