|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | LA-ICP-MS zircon U-Pb dating for high-pressure basic granulite from North Qinling and its geological significance显示文摘A combined study of CL imaging, LA-ICP-MS U-Pb dating and trace element analysis were carried out for zircon grains from high-pressure basic granulite at Song- shugou in North Qinling. The zircons display core-rim in- ternal texture. The cores are made up of sector or planar domains, partially displaying weak zoning or misty texture, and have the feature of low content of Th, U, REE, HREE, low Th/U ratio and high (Nd/Yb)N ratio, and the REE pat- tern typical for zircon coexisting with garnet. These features indicate the metamorphic genesis for the zircon cores. The rims have narrow light margins (<30 μm in width) around the cores and boundaries between core and rim are rounded or lough-like, indicating that the rims were formed during retrograde metamorphism. U-Pb isotopic data of 24 spots from the cores of 11 zircon grains yield a 206 Pb/238U weighted average age of 485±3.3 Ma, which is interpreted as the peak metamorphic age of high-pressure (HP) basic granulite. This age is well consistent within error with that of ultra- high-pressure (UHP) eclogite and its country rock gneiss (507±37 Ma) that occur at the north side of the Qinling Group, possibly indicating the occurrence of two contempo- raneous Early-Paleozoic HP to UHP metamorphic rock belts on the north and south sides of the Qinling Group. Combin- ing with the regional geological studies and the distribution of Early-Paleozoic granites related to subduction and colli- sion, the two HP to UHP metamorphic belts may be the products of continental crust bi-directional deep subduction toward Qinling micro-block caused by the subduction and collision of Paleozoic Qinling ocean and Erlangping ocean, respectively. | CHENDanling LIULiang SUNYong ZHANGAnda LIUXiaoming LUOJinhai | 2004 | Chinese Science Bulletin2004，49，21： | 41 |
| 2 | SHRIMP U-Pb zircon ages for the UHP metamorphosed granitoid gneiss in Altyn Tagh and their geological significance显示文摘Cathodoluminescence (CL) and mineral inclu- sions investigations show that zircons from Yinggelisayi UHP metamorphosed granitoid gneiss in Altyn Tagh exhibit core-mantle-rim internal texture with magmatic residual core, the metamorphic overgrowth mantle and the late stage rim. SHRIMP 206 Pb/238U ages of 5 spots from the mantles vary from 484±11 to 491±12 Ma with Th/U ratios from 0.01 to 0.03, yielding a weighted average age of 487±10 Ma (2σ ) as the age of the UHP metamorphosed granitoid gneiss. The 206Pb/238U ages from the oscillatory zoned cores range from 809±19 to 885±21 Ma with Th/U ratios ranging from 0.42 to 0.83, which are interpreted as the crystallization age of the protolith of the granitoid gneiss. The metamorphic age (487±10 Ma) of the UHP metamorphosed granitoid gneiss, well consistent with the peak metamorphic age (about 500 Ma) of the UHP eclogite with crystallization age of the proto- lith between 809±19 and 885±21 Ma at Jianggelisayi in west- ern Altyn Tagh, indicates the existence of a UHPM belt along the south margin of the Altyn Tagh as a result of deep sub- duction during Early Paleozoic age of previously existing continental crust. | ZHANGAnda LIULiang SUNYong CHENDanling WANGYan LUOJinhai | 2004 | Chinese Science Bulletin2004，49，23： | 21 |
| 3 | Determination of the Neoproterozoic Shicaogou Syn-collisional Granite in the Eastern Qinling Mountains and Its Geological Implications显示文摘The Shicaogou granite has been identified as a magnesian (Fe-number=0.71-0.76), calcic to calc-alkalic (MALI=3.84-5.76) and peraluminous (ASI=1.06-1.13) granite of the syn-collisional S-type, with high SiO2 (>71%),Al2O3 (>13%) and Na2O+K2O (6.28%-7.33%, equal for NaO2 and K2O). Trace element and REE analyses show that the granite is rich in LILE such as of Rb, Sr, Ba and Th, and poor in HFSE like Yb, Y, Zr and Hf. Its Rb/Sr ratio is greater than 1; the contents of Nb and Ta, and the ratio of Nb/Ta as well as the REE geochemical features (e.g. REE abundance, visible fractionation of LREE and HREE and medium to pronounced negative Eu anomalies) are all similar to those of crustorigin, continent-continent syn-collisional granite. Moreover, the granite exhibits almost the same pattern as that of the typical continent-continent syn-collisional granite on the spider diagram and all samples fall within the syn-collisional granite field.The cathodoluminescence (CL) investigations have revealed that the zircon from the Shicaogou granite represents a typical magmatic product characterized by its colorless, transparent and euhedral crystals, and distinct zoning of oscillatory bands. Residual cores of irregular zircon can be found in a few enhedral grains. Trace element studies of the zircon grains, with high contents of P, Y, Hf, Th, U and REE and high ratios of Th/U, obviously positive Ce anomalies and HREE enrichment compared to LREE, also result in the same conclusion.The LA-ICP-MS U-Pb isotopic data from 24 spots of 21 zircon grains demonstrate that 20 spots in the oscillatory zone yield an average weighted 206pb/238U age of 925+11 Ma, indicating that the Shicaogou granite was formed in the Neoproterozoic. Combined with other Neoproterozoic syn-collisional granites found in the study area, the present geochronological determination can further reveal that collision-amalgamation events could have occurred among some continental blocks in the Qinling orogenic belt during the Neoproterozoic. This in turn provides an accurate chronological constraint on the Neoproterozoic break-up and convergence in the belt. | CHENDanling LIULiang SUNYong ZHANGAnda ZHANGChengli LIUXiaoming LUOJinhai | 2004 | Acta Geologica Sinica(English Edition)2004，78，1： | 20 |
| 4 | Overcoming the fundamental light-extraction efficiency limitations of deep ultraviolet light-emitting diodes by utilizing transverse-magnetic-dominant emission显示文摘While the demand for deep ultraviolet(DUV)light sources is rapidly growing,the efficiency of current AlGaN-based DUV light-emitting diodes(LEDs)remains very low due to their fundamentally limited light-extraction efficiency(LEE),calling for a novel LEE-enhancing approach to deliver a real breakthrough.Here,we propose sidewall emission-enhanced(SEE)DUV LEDs having multiple light-emitting mesa stripes to utilize inherently strong transverse-magnetic polarized light from the AlGaN active region and three-dimensional reflectors between the stripes.The SEE DUV LEDs show much enhanced light output power with a strongly upward-directed emission due to the exposed sidewall of the active region and Al-coated selective-area-grown n-type GaN micro-reflectors.The devices also show reduced operating voltage due to better n-type ohmic contact formed on the regrown n-GaN stripes when compared with conventional LEDs.Accordingly,the proposed approach simultaneously improves optical and electrical properties.In addition,strategies to further enhance the LEE up to the theoretical optimum value and control emission directionality are discussed. | Dong Yeong Kim Jun Hyuk Park Jong Won Lee Sunyong Hwang Seung Jae Oh Jungsub Kim Cheolsoo Sone EFred Schubert Jong Kyu Kim | 2015 | Light(Science & Applications)2015，4，1： | 6 |
| 5 | OSCILLATION OF IMPULSIVE HYPERBOLIC PARTIAL DIFFERENTIAL EQUATION WITH DELAY显示文摘In this paper, oscillation properties of the solutions of impulsive hyperbolic equation with delay are investigated via the method of differential inequalities. Sufficient conditions for oscillations of the solutions are established. | Xue Qiutiao Wu Sunyong (Dept. of Computational Sci. and Math., Guilin University of Electronic Technology, Guilin 541004) Liu Anping (School of Math, and Physics, China University of Geosciences, Wuhan 430074) | 2006 | Annals of Differential Equations2006，22，3： | 3 |
| 6 | Efficacy of Entecavir and Adefovir Combination Therapy for Patients with Lamivudine- and Entecavir-Resistant Chronic Hepatitis B显示文摘 | Jung Jeon Hyun Shin Joung Lee Kwang Joo Jae Cha Jae Park Jun Lim Kyuseong Lim Sunyong Kim | 2012 | Digestive Diseases and Sciences2012，，5： | 1 |
| 7 | Bridge reliability assessment based on monitoring 显示文摘 | Frangopol Dan M Strauss Alfred Kim Sunyong | 2008 | Journal of Bridge Engineering2008，13，3： | 1 |
| 8 | Fluidized-bed combustion characteristics of cedar pellets by using an alternative bed material 显示文摘 | Tadaaki Shimizu Jun Han Sunyong Choi | 2006 | Energy & Fuels2006，20，： | 1 |
| 9 | Bridge Safety Evaluation Based on Monitored Live Load Effects显示文摘 | Liu M Frangopol D M Sunyong Kim S Y | | 0，，4： | 1 |
| 10 | Electronicstructuresandopticalof(L12,D022)GTiAl3andL12GTi(Al,Pt)3byfirstGprinciplescalculation显示文摘 | DuanYonghua SunYong LuLi | 2013 | JournalofFunctionalMaGterials2013，44，24： | 1 |
| 11 | Use of monitoring extreme data for the performance prediction of structures: General approach显示文摘 | Dan M. Frangopol Alfred Strauss Sunyong Kim | 2008 | Engineering Structures2008，，12： | 1 |
| 12 | Maintenance, management, life-cycle design and performance of structures and infrastructures: a brief review显示文摘 | DanM. Frangopol Duygu Saydam Sunyong Kim | 2012 | Structure and Infrastructure Engineering2012，，1： | 1 |
| 13 | 显示文摘 | SUNYong ZHANGJin-ping YANGGang etal(孙勇 张金平 杨刚 等) | | 食品科学0，，： | 1 |
| 14 | Microstructure of Ti·(CN)-WC-NbC-Ni Cermets显示文摘 | SUNYONG Ahn SEONGWON Kim KANG S | 2001 | J Am Ceram Soc2001，84，4： | 1 |
| 15 | Pre-treatment neutrophil to lymphocyte ratio as a prognostic marker to predict chemotherapeutic response and survival outcomes in metastatic advanced gastric cancer显示文摘 | In Rae Cho Jun Chul Park Chan Hyuk Park Jung Hyun Jo Hyun Jik Lee Sunyong Kim Choong Nam Shim Hyuk Lee Sung Kwan Shin Sang Kil Lee Yong Chan Lee | 2014 | Gastric Cancer2014，，4： | 1 |
| 16 | The Stability of the Nitrogen S - phase in Austenitic Stainless Steel显示文摘 | Li Xiao Ying SunYong Tom Bell | 1999 | Z Metallkd1999，90，11： | 1 |
| 17 | Use of monitoring extreme data for the performance prediction of structures: general approach 显示文摘 | Dan M Frangopol Alfred Strauss Sunyong Kim | 2008 | Engineering Structures2008，30，： | 1 |
| 18 | Tracefossils of Guanling Formation and its sedimentary environment显示文摘 | YangShi—pu(杨式溥) SunYong—zhuan(孙永传) | 1982 | 石油与天然气地质1982，3，4： | 1 |
| 19 | Single-step sensitization of reduced graphene oxide sheets and CdS nanoparticles on ZnO nanorods as visible-light photocatalysts显示文摘 | Pawar R C Lee Caroline Sunyong | 2014 | ApplCatal B2014，144，： | 1 |
| 20 | Fluidized-bed combustion characteristics of cedar pellets by using an alternative bed material 显示文摘 | Tadaaki Shimizu Jun Han Sunyong Choi et M | 2006 | Energy & Fuels2006，20，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员