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SHrIMP U-Pb dating for a K-bentonite bed in the Tieling Formation,North China

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Chinese Science Bulletin 2010年第29期55卷 3312-3323页

作者： SU WenBo LI HuaiKun huff W D ETTENSOHN F r ZHANg ShiHong ZHOU HongYing WAN YuSheng School of Earth Sciences and resources China University ofGeosciences (Beijing) Beijing 100083 China Tianjin Institute of geology and Mineral resources China Geological Survey Tianjin 300170 China Department of geology University of Cincinnati Cincinnati OH 45221-0013 USA Department of Earth and Environment Sciences University of Kentucky Lexington KY 40506-0053 USA Beijing SHrIMP Center Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

A SHrIMP U-Pb zircon age of 1437±21 Ma was obtained for a recently discovered K-bentonite bed in the Tieling Formation,situated northeast of Beijing at the boundary between Liaoning and Hebei provinces,on the northern margin of the North China Craton(NCC).The SHrIMP U-Pb age places Tieling Formation near the end of the Calymmian Period of the early Mesoproterozoic *** addition,a SHrIMP U-Pb zircon date of 1372±18 Ma was acquired for K-bentonite beds in the overlying,dark-shale-dominated Xiamaling Formation from the same location northeast of *** date assigns a similar Mid-Mesoproterozoic(Ectasian Period) age for the Xiamaling Formation,as have previously determined dates from other sections northwest of *** dates indicate that the Tieling and Xiamaling formations,as well as the related succession in the eastern part of the Yanshan Mountains,represented by the well-known Meso-to Neoproterozoic standard section in Jixian,can be correlated well with sections northwest of Beijing in the western part of the Yanshan *** other words,the boundary between the Calymmian and Ectasian periods in the northern parts of the NCC is marked by the unconformity between the Tieling and Xiamaling formations in the northern *** boundary was previously ascribed to the "Qinyu Orogeny" and thought to be of grenville *** this regard,the conventional "Qinyu Orogeny" should now be regarded as a short-lived regional uplift during Early Mesoproterozoic time,rather than a result from the grenvillian assembly of the NCC to the rodinia Supercontinent(～1.0 ga).

关键词： SHrIMP 铁岭组膨润土 Pb 锆石中国 rodinia超大陆中元古代早期

The complete Smoke trilogy

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The complete Smoke trilogy

Possibilities of using silicate rock powder:An overview

作者： Tanya huff.

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geoscience Frontiers 2022年第1期13卷 446-456页

作者： Claudete gindri ramos James C.Hower Erika Blanco Marcos Leandro Silva Oliveira Suzi huff Theodoro Department of Civil and Environmental Engineering Universidad de la CostaCalle 58#55-66BarranquillaColombia Departamento de Ingeniería Civil y Arquitectura Universidad de LimaAvenida Javier Prado Este 4600Santiago de Surco 1503Peru Center for Applied Energy research University of Kentucky2540 Research Park DriveLexingtonKY 40511USA Department of Earth&Environmental Sciences University of KentuckyLexingtonKY 40511USA Postgraduate Program of Environment and rural Development(PPg-MADEr) Área Universitária01Vila Nossa Senhora de Fátima–Campus UnBPlanaltinaDFBrazil

This study evaluates the on use of crushed rocks(remineralizers)to increase soil fertility levels and which contributed to increase agricultural productivity,recovery of degraded areas,decontamination of water,and carbon *** use of these geological materials is part of the assumptions of rock technology and,indirectly,facilitates the achievement of sustainable development goals related to soil management,climate change,and the preservation of water *** over the past 50 years on silicate rocks focused on soil fertility management and agricultural *** recently,the combined use with microorganisms and organic correctives have shown positive results to mitigate soil degradation;to expand carbon sequestration and storage;and to contribute to the adsorption of contaminants from water and *** this article we show results obtained in several countries and we show that this technology can contribute to the sustainability of agriculture,as well as to reverse global *** mineral nutrients are released more slowly from these types of inputs,they remain in the soil for a longer time,stimulating the soil *** addition,they are a technology to soluble synthetic fertilizers replace,since the few nutrients derived from such inputs not consumed by plants are lost by leaching,contaminating groundwater and water *** addition,conventional methods rely heavily on chemical pesticides which cause damage to soil’s microfauna(responsible for the decomposition of organic matter and nutrient cycling)and the loss of organic carbon(in the form of dioxide),which is quickly dispersed in the *** rock powders are applied in natura,have long-lasting residual effects and reduce greenhouse gas emissions.

关键词： rock powder Soil management Carbon storage Water contaminant adsorption

Implications of a new, biostratigraphically well-controlled, radio-isotopic age for the lower Telychian Stage of the Llandovery Series （Lower Silurian, Sweden）

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Episodes 2008年第3期31卷 309-314页

作者： Stig M. Bergstrom Funda Ozlem Toprak Warren D. huff roland Mundil School of Earth Sciences Division of Geological Sciences The Ohio State University 155 S. Oval Mall Columbus Ohio 43210 USA. Department of geoiogy University of Cincinnati Cincinnati Ohio 45221 USA Berkeley geochronology Center 2455 Ridge Road Berkeley California 94709 USA.

radio-isotopic analysis of single zircons from two early Telychian K-bentonites, one of which is among the most widespread Lower Paleozoic volcanic ash falls in north- ern Europe, yields overlapping weighted mean 206pb/238U ages of 438. 7± 1.0 Ma and 437.8 ± 0.5 Ma, respectively. The former age is from zircons of the Osmundsberg K-bentonite from the type locality at Osmundsberget in the Siljan area of central Sweden where it occurs in the lower part of the Spirograptus tur- riculatus graptolite Zone and in the lower part of the Angochitina longicollis Chitinozoan Zone. Zircons giv- ing the latter age are from a bed previously identified as the Osmundsberg K-bentonite at the Kallholn Quarry in the same area. Based on new biostratigraphic data, the latter bed is now considered to be slightly younger than the Osmundsberg K-bentonite. The dated stratigraphic level of the ash layers is slightly younger than the base of the Telychian Stage and thus represents a minimum age for the Aeronian/Telychian Stage boundary. A U-Pb age of 〉 438 Ma for the base of this stage, however, is older and in conflict with estimates in the most recent compilation of the Silurian time scale. In view of the fact that only three radio-isotopic dates from the entire Llan- dovery have been previously accepted, this new and biostratigraphically exceptionally well-controlled radio-isotopic date fills an important gap in the Lower Silurian geochronology.

关键词：无线电同位素蓝达夫里阶志留纪

Timing the termination of the Doushantuo negative carbon isotope excursion: evidence from U-Pb ages from the Dengying and Liuchapo formations,South China

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Science Bulletin 2018年第21期63卷 1431-1438页

作者： Mingzhong Zhou Taiyi Luo Warren D.huff Zhiqing Yang guanghong Zhou Tian gan Hua Yang Di Zhang School of geographical and Environmental Sciences Guizhou Normal University State Key Laboratory of Ore Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Department of geology University of Cincinnati Beijing SHrIMP Center Chinese Academy of Geological Sciences School of geography and Tourism Guizhou Education University College of Earth Sciences University of Chinese Academy of Sciences

The Doushantuo negative carbon isotope excursion(DOUNCE) is the largest known marine inorganic carbon isotope anomaly. The origin of this pronounced negative excursion is still an enigmatic issue that attracts geologists. Time constraints on the excursion are the critical information that would provide insight into its genesis. In previous decades, the timing of its termination has been constrained by the widely cited zircon U-Pb age of 550.5 ± 0.8 Ma for the tuff at the top of the Miaohe Member at the Jiuqunao section in the Yangtze gorges area, South China. However, results of recent studies indicate that the reliability of this time constraint needs to be re-evaluated. Here, a geochronological study was carried out using two K-bentonites from Fanglong in South China. A K-bentonite in the lower Dengying Formation yielded a U-Pb age of 557 ± 3 Ma, while a K-bentonite in the basal Liuchapo Formation yielded an age of 550 ± 3 Ma. Based on regional correlations between the Ediacaran successions in South China,the age(557 ± 3 Ma) for the K-bentonite in the lower Dengying Formation may serve as a second critical timing constraint for the ending of the DOUNCE. Combined with available estimates of the DOUNCE duration, our new data indicate that the DOUNCE has a maximum onset age ～570 Ma.

关键词： Doushantuo formation Dengying formation Shuram carbon isotope excursion South China

Continuous conversion of methanol to higher hydrocarbons at ambient pressure

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Journal of Natural gas Chemistry 2010年第5期19卷 461-462页

作者： William W.Porterfield gordon M.Zrelak L.Avery Moncure Matthew D.huff Hampden-Sydney College Pennsylvania State University University Park UNC-Charlotte

An iodozincate ionic liquid solvent and catalyst is used to convert methanol continuously to a wide variety of hydrocarbons at atmospheric pressure.

关键词： methanol conversion zinc iodide hydrocarbon formation

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Tennis or Badminton？

空中英语教室（初级版．大家说英语） 2013年第5期 39-41,55页

作者： by Katherine huff

中-新元古界标准剖面蓟县系首获高精度年龄制约——蓟县剖面雾迷山组和铁岭组斑脱岩锆石SHrIMP U-Pb同位素定年研究

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岩石学报 2014年第10期30卷 2999-3012页

作者：李怀坤苏文博周红英相振群田辉杨立公 Warren D huff Frank r ETTENSOHN 中国地质调查局天津地质矿产研究所中国地质大学地球科学与资源学院天津市蓟县中上元古界国家自然保护区管理中心 Department of geology University of CincinnatiCincinnatiOH 45221-0013 Department of Earth and Environment Sciences University of KentuckyLexingtonKY 40506-0053

近期在蓟县中-新元古界标准剖面铁岭组和雾迷山组首次发现斑脱岩、并测得其锆石SHrIMP U-Pb同位素年龄为～1440Ma（1439±14Ma）和～1485Ma（1483±13Ma和1487±16Ma）,这标志着这条传统的标准剖面上以碳酸盐岩为主体的蓟县系上部的两... 详细信息

近期在蓟县中-新元古界标准剖面铁岭组和雾迷山组首次发现斑脱岩、并测得其锆石SHrIMP U-Pb同位素年龄为～1440Ma（1439±14Ma）和～1485Ma（1483±13Ma和1487±16Ma）,这标志着这条传统的标准剖面上以碳酸盐岩为主体的蓟县系上部的两个重要组,从此也获得了直接的、高精度的锆石U-Pb同位素年龄约束。这是华北中-新元古界标准剖面蓟县系相关地层单位首次获得直接而精确的锆石U-Pb同位素年龄约束,也是在整个华北北缘燕山地区雾迷山组内部首次获得精确的直接定年。这一进展为闻名中外的天津蓟县剖面中-新元古界年代地层格架的正确厘定、以及今后继续作为华北该阶段的标准剖面,并与国内外其他地区相关地层的正确对比等,提供了新的、精确的年代学＂锚点＂,因而具有重要的科学和实际意义。

关键词：蓟县剖面斑脱岩铁岭组雾迷山组 SHrIMP U-Pb同位素测年中元古界华北克拉通

The global Stratotype Section and Point （gSSP） for the base of the Katian Stage of the Upper Ordovician Series at Black Knob ridge, Southeastern Oklahoma, USA

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Episodes 2007年第4期30卷 258-270页

作者： Daniel goldman Stephen A. Leslie Jaak Nōlvak Seth Young Stig M. Bergstroem Warren D. huff Department of geology University of Dayton 300 College Park Dayton Ohio 45469 USA Deparment of geology and Environmental Science James Madison University MSC 6903 Harrisonburg VA 22807 USA Institute of geology at Tallinn University of Technology Ehitajate tee 5 19086 Tallinn Estonia School of Earth Sciences Division of Geological Sciences The Ohio State University 155 S. Oval Mall Columbus Ohio 43210 USA Department of geology University of Cincinnati Cincinnati Ohio 45221 USA.

The global Boundary Stratotype Section and Point （gSSP） for the Katian Stage of the Upper Ordovician Series is defined as the 4.0 m-level above the base of the Bigfork Chert in the Black Knob ridge section, southeastern Oklahoma. This point in this section is coincident with the first appearance of the graptolite Diplacanthograptus caudatus, which has proved to be a reliable datum for precise worldwide correlation. The FAD ofD. caudatus occurs very near the first occurrences of the graptolites D. lanceolatus, *** americanus, Orthograptus pageanus, O. quadrimucronatus, Dicranograptus hians, and Neurograptus margaritatus. This rapid succession of fossil species appearance events provides a secure basis for identification of the base of the Katian Stage of the Upper Ordovician Series and for its global chronostratigraphic correlation.

关键词：层形断面奥陶纪俄克拉荷马州美国地质特点