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| 1 | 江苏省农作物秸秆综合利用技术分析显示文摘我国是一个农业大国,农作物秸秆资源丰富,但目前大量的秸秆被焚烧或废弃,不但造成严重的环境污染,而且还浪费了宝贵的可再生资源,因此,研究农作物秸秆综合利用技术具有重要的意义。该文分析了农作物秸秆的利用价值,探讨了秸秆综合利用的途径、技术现状及存在的问题,并提出了江苏农作物秸秆综合利用技术发展的建议和对策。 | 高翔 | 2010 | 江西农业学报2010,22,12: | 43 |
| 2 | Zircon U-Pb geochronology,Hf isotopic composition and geological implications of the rhyodacite and rhyodacitic porphyry in the Xiangshan uranium ore field,Jiangxi Province,China显示文摘The Xiangshan uranium ore field is the largest volcanic rock hosted uranium deposit in China.The host rock is a volcanic intrusive complex,including rhyodacite,porphyroclastic lava and late stage sub-volcanic rocks.In this study,zircons from an early stage rhyodacite and a late stage rhyodacite porphyry were dated by SHRIMP and LA-ICP-MS U-Pb methods,and their Hf isotopic compositions were measured by LA-MC-ICP-MS.206Pb/238U ages of 135.1±1.7 and 134.8±1.1 Ma were obtained for the rhyodacite and rhyodacitic porphyry,respectively.These accurate ages indicate that the Xiangshan volcanic-intrusive complex formed in the Early Cretaceous rather than in the Late Jurassic,as concluded in some previous studies.By the Early Cretaceous,the tectonic setting of the area has evolved into a back-arc extensional setting,possibly related to subduction of the paleo-Pacific plate.The close ages of the(early) eruptive rhyodacite and the(late) hypabyssal rhyodacitic porphyry shows that the Xiangshan volcanism was intensive and concentrated in a short time.Zircons from the rhyodacite show negative εHf(t) values of-5.7 to-8.5,with Hf depleted mantle model ages between 1550 and 1720 Ma,whereas zircons from the rhyodacitic porphyry yield εHf(t) values of-6.9 to-10.1 and Hf model ages between 1621 and 1823 Ma.These zircon Hf model ages are similar to the whole rock Nd model ages(1486 to 1911 Ma).Combined with other geochemical characteristics,the Xiangshan rhyodacite and rhyodacitic porphyry may have been derived from partial melting of the Paleo-Mesoproterozoic metamorphic rocks from the Xiangshan basement,without any significant addition of mantle-derived magma.Contribution of basement of this age is also supported by finding a Paleoproterozoic xenocrystic zircon core in the rhyodacite sample. | YANG ShuiYuan JIANG ShaoYong JIANG YaoHui ZHAO KuiDong FAN HongHai | 2010 | Science China Earth Sciences2010,53,10: | 40 |
| 3 | 河南省嵩县鱼池岭斑岩钼矿床成矿流体特征及其地质意义显示文摘河南省嵩县鱼池岭钼矿床产于合峪复式花岗岩基内部,含矿岩体为黑云母二长花岗斑岩。矿体呈透镜状或似层状产出于侵入体中,含矿斑岩全岩矿化。矿石构造主要为网脉浸染状,网脉矿物组合有石英±钾长石±绿帘石、石英-萤石±方解石、萤石以及大量的石英-黄铁矿、石英-辉钼矿、石英-多金属硫化物等。根据网脉矿物组合和穿切关系,将矿化过程分为早、中、晚3个阶段,其特征性围岩蚀变分别是高温硅化、钾长石化、绿帘石化,硅化、绢云母化、绿泥石化、硫化物化,以及低温碳酸盐化、萤石化。脉石英中广泛发育流体包裹体,包括水溶液包裹体(W型)、纯CO_2包裹体(PC型)、H_2O-CO_2包裹体(C型)及含子矿物多相包裹体(S型)。早期无矿石英脉中捕获了H_2O-CO_2-NaCl体系的初始成矿流体,其温度集中于280~420℃、盐度为30.1 wt%~54.1 wt%NaCl.eqv,压力最大值为194MPa(约6.8km深)。成矿流体上升至5.6km左右、温度降低至400℃即发生沸腾,CO_2大量逸失,黄铁矿及少量辉钼矿沉淀,形成石英-黄铁矿-辉钼矿脉;在280~380℃、~137MPa、约4.8km深处流体强烈沸腾,辉钼矿大量沉淀。在200~340℃、约0.8~4.3km深时,黄铁矿、辉钼矿、黄铜矿、闪锌矿等多种金属硫化物沉淀,形成石英-多金属硫化物脉。晚期流体为H_2O-NaCl体系,脉石英中仅见水溶液包裹体,均一温度为130~200℃。上述结果表明,由酸性岩浆分异出高温、高盐度、富CO_2流体,CO_2可大量存在于浆控高温热液体系。结合区域地质演化,认为包括鱼池岭含矿斑岩在内的合峪花岗岩基形成于加厚造山带地壳的快速隆升过程;考虑到成矿年龄为144Ma,确定144Ma以来的最大剥蚀厚度不超过7km,平均剥蚀速率不超过0.05mm/a。 | 李诺 陈衍景 倪智勇 胡海珠 | 2009 | 岩石学报2009,25,10: | 36 |
| 4 | Re-Os isotope dating of molybdenites in the Huang-shaping Pb-Zn-W-Mo polymetallic deposit, Hunan Province, South China and its geological significance显示文摘The large-scale Huangshaping Pb-Zn-W-Mo polymetallic deposit is located in the central Nanling min- eralization zone, South China. Six molybdenite samples from the Huangshaping deposit were selected for Re-Os isotope measurement in order to define the mineralization age of the deposit. It yields a Re-Os isochron age of 154.8±1.9 Ma (2σ ), which is in accordance with the Re-Os model ages of 150.9― 156.9 Ma. This age is about 7 Ma younger than their host granite porphyry, which was dated as 161.6±1.1 Ma by zircon U-Pb method using LA-ICPMS. All these ages demonstrate that the Huang- shaping granite and related Pb-Zn-W-Mo deposit occurred in the middle Yanshanian period, when many other granitoid and related ore deposits emplaced and formed, e.g. the Qitianling granite and Furong tin deposit, the Qianlishan granite and giant Shizhuyuan W-Sn-Mo-Bi deposit and Jinchuantang Sn-Bi deposit in the nearby area. They constitute the main part of the magmatic-metallogenic belt of southern Hunan, and represent the large-scale metallogeny in middle Yanshanian in the area. The lower rhenium content in molybdenite of Huangshaping deposit suggests that the ore-forming material was mainly of crust origin. | YAO JunMing HUA RenMin QU WenJun QI HuaWen LIN JinFu DU AnDao | 2007 | Science China Earth Sciences2007,50,4: | 29 |
| 5 | 基于InVEST生境质量模型与景观格局指数的山地植物多样性变化研究——以甘肃白龙江流域为例(英文)显示文摘Mountains in western China, hosted rich biodiversity and millions of people and inhabitant with vital ecosystem services, had experienced the most serious biodiversity loss with fragile ecological problems. Even though increasing attentions had been paid to this issue, we still lacked efficient methods to assess the change of plant biodiversity at medium/large scale due to the poor data and co-existing multiple habitat types. This study proposed an integrated method combining InVEST-habitat quality model, NPP and landscape pattern indexes to analyze the spatial heterogeneity of plant biodiversity and its spatiotemporal change on raster cell scale. The results indicated that plant biodiversity service was high in Bailongjiang watershed with obvious spatial pattern variations. The land area containing higher plant biodiversity were 3161 km2, which mainly distributed in the National Nature Reserve and forestry area. While the areas with lower plant biodiversity accounted for 37.67% and mainly distributed in the valleys between Zhouqu-Wudu-Wenxian County, the valley of Minjiang in Tanchang County and alpine mountain snow-covered regions. During 1990–2010, plant biodiversity level tended to increase and the higher plant biodiversity area increased from 14.13% to 17.15% due to ecological restoration and afforestation, while plant biodiversity decreased in the area with intensive human activities, such as cultivated land, urban and rural land. The results showed that combining InVEST-habitat quality model, NPP and landscape pattern indexes can effective reveal mountain plant biodiversity change. The study was useful for plant biodiversity conservation policy-making and human activity management for the disaster-impacted mountainous areas in China. | 巩杰 谢余初 曹二佳 黄秋燕 李红瑛 | 2019 | Journal of Geographical Sciences2019,29,7: | 29 |
| 6 | 华北克拉通东北缘岩石圈深部物质组成的不均一性:来自吉林南部中生代火山岩元素及Sr-Nd同位素地球化学的证据显示文摘本文报导了吉林南部果松组和三棵榆树组火山岩的全岩K-Ar和角闪石^(40)Ar/^(39)Ar定年结果和岩石地球化学资料,并讨论了吉林南部早白垩世火山岩岩浆源区性质以及空间变异。定年结果显示,果松组和三棵榆树纽火山岩的形成时代分别为130.2±0.3Ma和118.3±1.9Ma。果松组火山岩主要由玄武岩-玄武质粗面安山岩-粗面安山岩-英安岩组成;它们的SiO_2含量介于46%~64%,Mg~#介于31~50之间,Al_2O_3含量介于14.9%~18.9%之间,全碱含量(Na_2O+K_2O)介于4.61%~9.23%之间,属于亚碱性系列,具钙碱性演化趋势;并以富集大离子亲石元素(LILEs)和轻稀土元素(LREEs),亏损重稀土元素(HREEs)和Nb、Ta、Ti等高场强元素(HFSEs)为特征;(^(87)Sr/^(86)Sr)_i值和ε_(Nd)(t)值分别介于0.7065~0.7077和-2.67~ -19.71之间。果松组火山岩的成分具有较好的空间变异趋势,由东向西,火山岩的基性程度增高,东部果松组火山岩具有较高的(^(87)Sr/^(86)Sr)。值,而西部具有较低的ε_(Nd)(t)值。三棵榆树组火山岩由粗面安山岩和粗面英安岩组成;三棵榆树组火山岩的SiO_2含量介于55.5%~65.8%之间,Mg~#介于42~50,Al_2O_3含量介于15.0%~15.7%,全碱含量偏高(Na_2O+K_2O=6.93%~9.24%),主体属于亚碱性系列,具钙碱性系列的演化趋势;并以较高的Th/U(5.36~5.82)、Ba/Nh(50.2~120.0)、(La/Yh)_N(32.9~47.9)和Sr/Y(50.0~72.4)比值为特征;它们的(^(87)Sr/^(86)Sr)_i值和ε_(Nd)(t)值分别变化于0.7056~0.7057和-8.99~-19.71之间。上述特征揭示,果松组火山岩(130Ma)的形成主要与古太平洋板块的俯冲作用有关,岩浆来源于受流体/熔体交代的地幔楔,东西部受到不同程度陆壳物质的混染。与果松组火山岩相比,三棵榆树组火山岩(118Ma)形成于俯冲背景下的相对引张环境,岩浆来源于受交代的岩石圈地幔,但受到深部陆壳物质的混染。 | 裴福萍 许文良 杨德彬 于洋 孟恩 | 2009 | 岩石学报2009,25,8: | 28 |
| 7 | U-Pb zircon geochronology and Hf isotope study of metamorphosed basic-ultrabasic rocks from metamorphic basement in southwestern Zhejiang:The response of the Cathaysia Block to Indosinian orogenic event显示文摘A combined study using LA-ICP-MS U-Pb dating, Hf isotopes, trace elements and the Ti-in-zircon geo-thermometer was carried out on zircons from the metamorphosed basic-ultrabasic rocks in the meta-morphic basement of the Cathaysia Block, southwestern Zhejiang Province. The formation and meta-morphic ages of the rocks from the metamorphic basement of the Cathaysia Block were determined based on zircon U-Pb geochronology. The age for the magmatic crystalline zircons from the protolith is about 1.85 Ga. The εHf(t) values of the older zircons were from ?7 to ?3, with two-stage model Hf ages (TDM2LC) of about 2.9 to 3.4 Ga, indicating that the source material was derived from anatexis and recy-cling of the Archean crust. The newly formed metamorphic zircons yielded U-Pb ages of 260―230 Ma. The metamorphic temperature calculated using the Ti-in-zircon geothermometer ranged from 610 to 720℃, consistent with the results from petrographic observations, indicating that the Cathaysia Block experienced an amphibolite facies metamorphism during the Indosinian. Results from this study pro-vided an important timeframe for the tectonic evolution in South China and the Southeast Asia during the Late Permian and Early Triassic times. | XIANG Hua ZHANG Li ZHOU HanWen ZHONG ZengQiu ZENG Wen LIU Rui JIN Song | 2008 | Science China Earth Sciences2008,51,6: | 24 |
| 8 | Discovery of a Late Permian Angara-Cathaysia mixed flora from Acheng of Heilongjiang,China,with discussions on the closure of the Paleoasian Ocean显示文摘This work documents a new flora from the Upper Permian Hongshan Formation of Acheng County, Heilongjiang Province, Northwest China. The flora consists of 20 species: Paracalamites sp., Pecopteris tangwangheensis Huang, Callipteris obese Huang, Callipteris shenshuensis Huang, C. tangwangheensis Huang, C. heilongjiangensis Huang, C. zeilleri Zalessky, C. sp., Comia yichunensis Huang, C. tenueaxis Huang, Iniopteris sibirica Zalessky, Supaia teiliensis Huang, Compsopteris tchirkovae Zalessky, C. cf. adzvensis Zalessky, Nilssonia sp. 1, Nil. sp. 2, Taeniopteris cf. densissima Halle, T. cf. nystraemii Halle, T. sp. and Noeggerathiopsis derzavinii Neub. It is dominated by Angara species but mixed with some typical Cathaysian elements. The age of the flora is assigned to late of the Late Permian according to the stratigraphic ranges of the known species and the comparisons of it with the similar floras. The new discovery indicates that the final collision between the North China Plate and Siberian Plate occurred in Late Permian along the Xar Moron River-Changchun-Yanji sutured zone, and the Paleoasian Ocean was finally closed at the end of the Permian. | DENG ShengHui1,2, WAN ChuanBiao3 & YANG JianGuo3 1 Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China 2 State Key Laboratory of Enhanced Oil Recovery, Beijing 100083 China 3 Daqing Institute of Petroleum Exploration and Development, PetroChina, Daqing 164712, China | 2009 | Science China Earth Sciences2009,52,11: | 22 |
| 9 | 海南省五指山地区油茶林调查研究显示文摘油茶是我国南方特有的重要木本油料树种之一,有很大的发展潜力。本文对海南省五指山地区油茶林进行了定点调查,分析了油茶的产量、营养状况以及不同区域的差异性。结果表明,五指山地区不同区域之间,油茶林的产量存在高、中、低三种状况,油茶营养元素含量呈显著性差异。这将为五指山地区油茶林的科学管理以及进一步发展提供一定的参考依据。 | 李艳 陈良秋 杨伟波 唐龙祥 郑亚军 孙丽萍 | 2010 | 江西农业学报2010,22,11: | 20 |
| 10 | 辽西北票蓝旗组火山岩锆石U-Pb年龄和Hf同位素组成显示文摘辽西北票常河营子地区有中生代蓝旗组火山岩分布,其中上部安山质角砾熔岩的锆石LA-ICPMS U-Pb年龄分析结果表明,其结晶年龄为159.4±3.4Ma,属晚侏罗世。锆石^(176)Hf/^(177)Hf比值介于0.282098~0.282789之间,ε_(Hf)(t)值为-20.4~+4.1,主体分布在华北克拉通地壳演化线之上,位于古元古代地壳演化范围内,所给出的亏损地幔年龄(t_(DM))和平均地壳模式年龄(t_(cruat))分别为0.7~1.6Ga和0.9~2.5Ga。结合已发表蓝旗组中酸性火山岩的岩石地球化学及Sr-Nd同位素组成特征,我们认为安山质火山岩源于古老(如晚太古代)下地壳玄武质岩石的部分熔融,其形成过程可能与中生代幔源岩浆底侵作用有关。 | 马强 郑建平 | 2009 | 岩石学报2009,25,12: | 16 |
| 11 | 湖南芙蓉锡多金属矿床成矿流体地球化学显示文摘湖南芙蓉锡多金属矿床是我国最近发现的与A型花岗岩具有成因联系的超大型锡多金属矿床。本文对该矿床主要的四种矿化类型(矽卡岩型、云英岩型、蚀变花岗岩型、锡石硫化物型)进行了系统的流体包裹体地球化学和稳定同位素地球化学研究。研究结果表明:该矿床中流体包裹体类型复杂,包括富含CO_2包裹体、气液包裹体、含子晶包裹体和气相包裹体。矽卡岩型矿石中流体包裹体均一温度主要集中在400~450℃,云英岩和蚀变花岗岩型矿石的均一温度相对下降,主要分布于250~350℃之间,锡石硫化物型矿石中包裹体温度进一步下降。成矿流体主要由高盐度CaCl_2-NaCl-KCI-HO_O流体(盐度多集中在32.2 wt%~50.6 wt%NaCl.eqv)和富含CO_2的CO_2-CH_4-NaCl-H_2O低盐度流体(盐度多集中在32.2 wt%~50.6wt%NaCl.eqv)组成。芙蓉锡矿云英岩型矿石成矿流体中的水主要以岩浆水为主,锡石硫化物型矿石成矿流体中的水具有岩浆水和大气降水混合的特征,成矿流体中的碳为岩浆碳与沉积碳酸盐不同比例混合的结果。芙蓉锡多金属矿床的成矿流体应主要来源于骑田岭黑云母二长花岗岩岩浆结晶期后分异出的岩浆热流体。岩浆热流体沿岩体周围裂隙对围岩和原生矽卡岩进行热液交代,在造成绢云母化、白云母化、绿泥石化等热液蚀变现象的同时,导致了大规模的锡矿化。减压沸腾和低温流体与高温流体混合造成的沸腾作用是导致芙蓉锡矿锡沉淀的主要机制。 | 双燕 毕献武 胡瑞忠 彭建堂 苏文超 朱长生 | 2009 | 岩石学报2009,25,10: | 15 |
| 12 | 黑龙江省三矿沟矽卡岩型铁铜矿床流体包裹体研究显示文摘对黑龙江省三矿沟矽卡岩型铁铜矿床内花岗闪长岩中石英斑晶、硫化物阶段及石英-碳酸盐阶段的石英、方解石中流体包裹体的岩相学、显微测温学和显微激光拉曼光谱分析等的研究结果表明,流体包裹体有富液相、富气相和含子矿物多相包裹体3种类型;花岗闪长岩石英斑晶中的含子矿物多相包裹体均一温度均值为432℃,盐度在30.92 wt%~63.91wt%NaCl eqv.之间,平均为52.96 wt%NaCl eqv,代表了高温、高盐度岩浆流体;硫化物阶段形成的黄铜矿磁铁矿矿石中流体温度主要介于323~424℃之间,盐度介于8.95 wt%~62.51 wt%NaCl eqv.之间;硫化物阶段形成的黄铜矿矿石中流体温度主要介于333~441℃之间,盐度介于8.28 wt%~65.32 wt%NaCl eqv.之间;石英-碳酸盐阶段流体温度主要介于124~140℃之间,盐度介于1.65 wt%~4.34 wt%NaCl eqv.之间。铁铜矿石均形成于高温、高盐度阶段,以岩浆热液为主,在成矿晚期,由于大气降水的混合,形成了少量低温、低盐度流体,成矿流体以富Na、K、Ca、Cl^-和CO_3^(2-)的高盐度流体为特征,主体属于 NaCl-H_2O-CO_2-H_2S-CH_4体系。成矿流体在300~400℃区间内发生了强烈的沸腾作用,导致大量金属硫化物和少量金属氧化物沉淀,沸腾作用对三矿沟铁铜矿床的形成起到至关重要的作用。 | 刘军 武广 钟伟 朱明田 | 2009 | 岩石学报2009,25,10: | 15 |
| 13 | Sauropterygian from Triassic of Guizhou,China显示文摘A new sauropterygian, Anshunsaurus huangguoshuensis, is described on the basis of a well-preserved skull from the Late Triassic Wayao Member of Falang Formation, Guizhou Province, southwestern China. It is ascribed to Eusauropterygia because it possesses the following characters: the rostrum is mainly composed by the premaxillae; the nasals are small,paired and separated from one another by the premaxillae; the external nares are close to the orbits; and the frontals are fused. Anshunsaurus differs from other Triassic sauropterygians in its large size, long rostrum and the supratemporal fenestrae slightly smaller than orbits. It is further considered to be closely related to Pistosaurus on the basis of the nasals contact with the prefrontals; large pineal foramen, lain in the anterior part of the parietal table; the squamosals not in contact posterior to the supratemporal fenestra. The discovery of Anshunsaurus with the ichthyosaurs in the same locality indicates a new assemblage of Triassic marine | LIU JunInstitute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences , Beijing 100044, China | 1999 | Chinese Science Bulletin1999,44,14: | 15 |
| 14 | The oldest angiosperm--a tricarpous female reproductive fossil from western Liaoning Province, NE China显示文摘The fossil plant female reproductive organs each with a tricarpous were collected from the Yixian Formation, Chaoyang district, western Liaoning Province. The geological age of the Yixian Formation here is believed to be Late Jurassic, which places this fossil as the oldest angiosperm currently known. Its morphological characters are distinct from other known angiosperm reproductive organs as it has 3 ovaries, each with a terminal style and an apical stigma. 9 such organs compose a cyme. As this morphological arrangement is unique to this plant, a new genus and species has been established, named Chaoyangia liangii gen. et sp. nov. | 段淑英 | 1998 | Science China Earth Sciences1998,41,1: | 15 |
| 15 | 福建省冬种马铃薯晚疫病流行动态及防治药剂筛选研究显示文摘2008~2009年对福建省福州市和长乐市两个冬种马铃薯晚疫病田间观测点进行了系统调查,对马铃薯晚疫病发病因素和田间病害流行动态进行了分析,并采用菌丝生长抑制法和田间防治效果对6种常用防治疫病的杀菌剂进行了评估.研究结果表明,马铃薯晚疫病发生、流行的主要时期在2月中旬至4月下旬,初始病情、日平均温度和日平均相对湿度是影响马铃薯晚疫病发生流行的重要因素,若日平均温度18~23 ℃,且相对湿度超过85%,一般在3~7 d后有晚疫病发生、流行,烯酰吗啉、氟吗啉、氟吗啉·锰锌、银法利和克露对马铃薯晚疫病防治效果显著,防治效果达80%以上. | 袁宗胜 刘芳 兰成忠 | 2010 | 江西农业学报2010,22,12: | 14 |
| 16 | 基于均方差权值法的山东省县域城镇化水平评价显示文摘在多指标综合评价中,各属性指标权重系数的大小对评价结果有着直接而重要的影响.均方差权值法作为诸多客观赋权法中的一种,较好地解决了主观赋权法无法避免的某些随机性和主观臆断性问题,同时也在一定程度上摆脱了某些客观赋权法存在的局限.文章介绍了均方差权值法的基本原理及其操作过程,并运用该方法对山东省县域城镇化综合发展水平进行了评价,就县域城镇化要素特征进行了深入探讨.结果表明,山东省县域城镇化发展极不平衡,空间分异特征极其明显.从总体上看,城镇化发展水平的空间分布同经济发展和社会发展较相吻合,大致呈现为两轴相交的'┣'型格局. | 王聪 朱喜钢 王富喜 | 2009 | 山东师范大学学报(自然科学版)2009,24,4: | 14 |
| 17 | 吉林东部大蒲柴河adakites锆石U-Pb年龄、Hf同位素特征及其意义显示文摘地球化学研究表明,大蒲柴河岩体具有典型的埃达克岩特征,来自加厚下地壳的部分熔融作用。本文采用激光等离子质谱对该岩体进行了U-Pb同位素定年,结果表明该岩体为晚侏罗世(165Ma)岩浆活动的产物。锆石的LA-MC-ICPMS Hf同位素研究结果显示,ε_(Hf)(165Ma)范围为-5.02~5.43,二阶段Hf模式年龄(t_(DM2)范围为965~1622Ma,暗示原始母岩浆为两种不同源区岩浆的混合。另外,Hf同位素研究表明,研究区在中-新元古代时(965~1304Ma)曾经历了一次重要的地壳增生事件。 | 刘燊 胡瑞忠 冯彩霞 冯光英 于晓飞 李才 贾大成 齐有强 王涛 | 2009 | 岩石学报2009,25,12: | 14 |
| 18 | Fission track dating of the Cenozoic uplift in Mabian area, southern Sichuan Province, China显示文摘The apparent ages of samples are obtained from fission track dating of apatite samples collected from the fault zones in Mabian area, southern Sichuan Province. In addition, thermal history is simulated from the obtained data by applying AFT Solve Program, to acquire the thermal evolution history of the samples. The result shows that tectonically the Mabian area was relatively stable between 25 and 3 Ma, compared to the inner parts and other marginal areas of the Tibetan Plateau. The studied area had little response to the rapid uplift events that occurred for several times in the Tibetan Plateau during 25-3 Ma. The latest thermal event related to the activity of the Lidian fault zone (about 8 Ma ) is later than that of the Ebian fault zone (18-15 Ma ) to the west, indicating to some extent that the evolution of fault activity in the Mabian area has migrated from west to east. The latest extensive tectonic uplift occurred since about 3 Ma. As compared with the Xianshuihe fault zone, the Mabian area is closer to the east- ern margin of the plateau, while the time of fast cooling event in this area is later than that in the southeast segment of the Xianshuihe fault zone (3.6-3.46 Ma ). It appears to support the assumption of episodic uplift and stepwise outward extension of the eastern boundary of the Tibetan Plateau in late Cenozoic. | AN YanFen HAN ZhuJun WAN JingLin | 2008 | Science China Earth Sciences2008,51,9: | 14 |
| 19 | 湖北省水库大坝安全监测现状及对策显示文摘结合湖北省水库除险加固及大坝安全监测工作,介绍了湖北省水库大坝安全监测的发展历程及现状,分析了当前存在的问题及开展水库大坝安全监测的必要性,并提出了加强大坝安全监测的对策与举措。 | 帅移海 李俊辉 高红民 | 2010 | 水电能源科学2010,28,8: | 13 |
| 20 | Analysis on REE geochemical characteristics of three types of REE-rich soil in Guizhou Province,China显示文摘The three kinds of soil formed by the weathering of the basalt in Yema village,Weining county of Guizhou province,the carbonate rock in Guiyang district and the phosphorite in the REE-bearing phosphate mining area in Zhijin county of Guizhou province were all rich in REE.The contents of LREE in these three soil were higher than that of HREE,which was caused by the different properties of LREE and HREE complexes.Since light REE could be easily absorbed by kaolinite grains,LREE was fully enriched in the process of desorption,migration and re-absorption,which formed a typical LREE soil.The chondrite normalized distribution models of those three types of REE-enriched soil are basically similar,which belong to the right deviation type,namely,rich in light rare earth element but short of heavy rare earth element,and showing Ce negative anomalies.Eu showed intense negative anomalies in the REE in the soil formed by the weathering of the sedimentary parent rocks(such as carbonate rock and phosphorite),while no pronounced Eu anomaly was found in the REE in the soil formed by the weathering of volcanic rocks(such as basalt).It is clear that though there were intense migration and enrichment of REE during the weathering process of rocks,no obvious differentiation of REE occurred and some features of the parent rocks were retained.That is why REE is of value in analyzing the source of materials. | 陈吉艳 杨瑞东 | 2010 | Journal of Rare Earths2010,28,S1: | 13 |