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1Emplacement age of the Tahe granite and its constraints on the tectonic nature of the Ergun block in the northern part of the Da Hinggan Range显示文摘Large-scale granitic plutons are exposed in the Ergun block in the northern part of the Da Hinggan Range, but their emplacement age and petrogenesis remain un-known. Of these plutons, the Tahe pluton is composed mainly of porphyritic syenogranite and monzogranite, with minor hornblende alkali feldspar granite and gabbro, which have affinities to post-orogenic granitoids. Laser-ablation Induc-tively Coupled Plasma Mass-spectroscope (LA-ICP-MS) analysis shows that the major rock types of the Tahe pluton formed at 494-480 Ma ago, indicating its emplacement in the Early Paleozoic. It is concluded, therefore, that the colli-sion between the Ergun and the Xing’an blocks ended in Early Paleozoic. Considering the geochronological data of the plutons in the adjacent areas, the Early Paleozoic evolu-tionary history of the Ergun block is similar to the central Mongolia and the Tuvino blocks in Mongolia, and the Ergun block should be a part of the accretionary continental mar-gin in the southern Siberian Craton.GE Wenchun WU Fuyuan ZHOU Changyong Abdel Rahman A. A. 2005Chinese Science Bulletin2005,50,18:111
2Porphyry Cu-Mo deposits in the eastern Xing’an-Mongolian Orogenic Belt: Mineralization ages and their geodynamic implications显示文摘东方 Xing “一 -- 蒙古(Xing-Meng ) Orogenic 带(XMOB ) 是斑岩铜(Cu ) 的重要区域之一在中国的铝(瞬间) 存款。然而,在矿化作用和他们的 geodynamic 意义的准确年龄的研究是很有限的。在这研究,从 Duobaoshan Cu 的 granodioritic 岩石扔, Daheishan 瞬间沉积物被选择做锆石虾 U-Pb 分析以便抑制他们的矿化作用年龄。Geochronological 数据显示矿化作用的二个事件发生在 Duobaoshan Cu 存款。与 Duobaoshan 斑岩 Cu 存款有关的 granodiorite 被形成在与 485 ± 8 妈的锆石 U-Pb 年龄早古生代,而与 Sankuanggou skarn 类型 Cu 存款有关的 granodiorites 是 emplaced 在里面,有锆石 U-Pb 的侏罗记 176 ± 3 和 177 ± 3 妈变老。在吉林省的 Daheishan 区域,与斑岩瞬间存款有关的 granodiorite 斑岩的炮兵阵地年龄在 178 ± 3 妈在 170 ± 3 妈,和 unmineralized monzogranite 被标明日期。因此, Cu 瞬间矿化作用的二个事件分别地在东方 XMOB 被开发,在 -485 妈和 -175 妈。基于地质的历史和 granitoids 的空间时间的分发在东北( NE )中国, Duobaoshan Cu 存款与 Xing 的碰撞有关,这被建议“and Erguna 堵住在早古生代,并且 Sankuanggou Cu 和 Daheishan 瞬间存款在侏罗记期间与Paleo和平的板的 subduction 有关。GE WenChun WU FuYuan ZHOU ChangYong ZHANG JiHeng 2007Chinese Science Bulletin2007,52,24:108
3Mesozoic Bimodal Volcanic Suite in Zhalantun of the Da Hinggan Range and Its Geological Significance: Zircon U-Pb Age and Hf Isotopic Constraints显示文摘Mesozoic bimodal volcanic rocks of basaltic andesite and rhyolite are widely distributed in the Da Hinggan Range, but their petrogenetic relationships and geodynamic implications are rarely constrained. Detailed studies on doleritic and porphyry dikes in the Zhalantun area indicate that they display features of magma mixing, suggesting their coeval formation. In situ zircon U-Pb dating shows that the porphyry was emplaced in the Early Cretaceous with a 206Pb/238U age of 130±1 Ma. Zircons from the dolerite also yield an Early Cretaceous emplacement age of 124±2 Ma although some inherited zircons have been identified. These age results indicate that the Early Cretaceous was an important period of magmatism in the Da Hinggan Range. Zircons from porphyry are characterized by positive value of εHf(t) as high as 10.3±0.5 with Hf depleted mantle model age of 349–568 Ma, whereas magmatic zircons from the dolerite have εHf(t) value of 11.0±1.4 with Hf depleted mantel model age of 342–657 Ma, consistent with those from the porphyry. Considering other data on the geological evolution of this area, it is concluded that the mafic magma originated from the partial melting of Paleozoic enriched lithospheric mantle, whereas the felsic magma came from recycling of juvenile crust formed during the Paleozoic. Both of the protoliths are closely related to the subduction of the Paleo-Asian Ocean during the Paleozoic, indicating that the Paleozoic is an important period of large-scale crustal growth in the area.ZHANG Jiheng GE Wenchun WU Fuyuan LIU Xiaoming 2006Acta Geologica Sinica(English Edition)2006,80,1:52
4Subduction history of the Paleo-Pacific slab beneath Eurasian continent: Mesozoic-Paleogene magmatic records in Northeast Asia显示文摘This paper presents a review on the rock associations, geochemistry, and spatial distribution of Mesozoic-Paleogene igneous rocks in Northeast Asia. The record of magmatism is used to evaluate the spatial-temporal extent and influence of multiple tectonic regimes during the Mesozoic, as well as the onset and history of Paleo-Pacific slab subduction beneath Eurasian continent. Mesozoic-Paleogene magmatism at the continental margin of Northeast Asia can be subdivided into nine stages that took place in the Early-Middle Triassic, Late Triassic, Early Jurassic, Middle Jurassic, Late Jurassic, early Early Cretaceous, late Early Cretaceous, Late Cretaceous, and Paleogene, respectively. The Triassic magmatism is mainly composed of adakitic rocks,bimodal rocks, alkaline igneous rocks, and A-type granites and rhyolites that formed in syn-collisional to post-collisional extensional settings related to the final closure of the Paleo-Asian Ocean. However, Triassic calc-alkaline igneous rocks in the Erguna-Xing'an massifs were associated with the southward subduction of the Mongol-Okhotsk oceanic slab. A passive continental margin setting existed in Northeast Asia during the Triassic. Early Jurassic calc-alkaline igneous rocks have a geochemical affinity to arc-like magmatism, whereas coeval intracontinental magmatism is composed of bimodal igneous rocks and A-type granites. Spatial variations in the potassium contents of Early Jurassic igneous rocks from the continental margin to intracontinental region, together with the presence of an Early Jurassic accretionary complex, reveal that the onset of the PaleoPacific slab subduction beneath Eurasian continent occurred in the Early Jurassic. Middle Jurassic to early Early Cretaceous magmatism did not take place at the continental margin of Northeast Asia. This observation, combined with the occurrence of low-altitude biological assemblages and the age population of detrital zircons in an Early Cretaceous accretionary complex,indicates that a strike-slip tectonic regime existed between the continental margin and Paleo-Pacific slab during the Middle Jurassic to early Early Cretaceous. The widespread occurrence of late Early Cretaceous calc-alkaline igneous rocks, I-type granites, and adakitic rocks suggests low-angle subduction of the Paleo-Pacific slab beneath Eurasian continent at this time. The eastward narrowing of the distribution of igneous rocks from the Late Cretaceous to Paleogene, and the change from an intracontinental to continental margin setting, suggest the eastward movement of Eurasian continent and rollback of the PaleoPacific slab at this time.Jie TANG Wenliang XU Feng WANG Wenchun GE 2018Science China Earth Sciences2018,61,5:48
5The willow genome and divergent evolution from poplar after the common genome duplication显示文摘Xiaogang Dai Quanjun Hu Qingle Cai Kai Feng Ning Ye Gerald A Tuskan Richard Milne Yingnan Chen Zhibing Wan Zefu Wang Wenchun Luo Kun Wang Dongshi Wan Mingxiu Wang Jun Wang Jianquan Liu Tongming Yin 2014Cell Research2014,24,10:28
6Two-phase TOPSIS of uncertain multi-attribute group decision-making显示文摘To solve the uncertain multi-attribute group decision-making of unknown attribute weights,three optimal models are built to decide the corresponding ideal solution weights,standard deviation weights and mean deviation weights.The comprehensive attribute weights are gotten through the product of the above three kinds of weights.And each decision maker's weighted decision matrices are also received by using the integrated attribute weights.The closeness degrees are also gotten by use of technique for order preference by similarity to ideal solution(TOPSIS) through dealing with the weighted decision matrices.At the same time the group decision matrix and weighted group decision matrix are gotten by using each decision-maker's closeness degree to every project.Then the vertical TOPSIS method is used to calculate the closeness degree of each project.So these projects can be ranked according to their values of the closeness degree.The process of the method is also given step by step.Finally,a numerical example demonstrates the feasibility and effectiveness of the approach.Wenkun Zhou Wenchun Jiang 2010Journal of Systems Engineering and Electronics2010,21,3:15
7New Zircon U-Pb Age of the Super-Large Lijiagou Spodumene Deposit in Songpan Garze Fold Belt, Eastern Tibet: Implications for Early Jurassic Rare-Metal Polymetallic Event显示文摘The Songpan-Garze Fold Belt (SGFB), located in theeastern part of the Tibet Plateau and west of the SichuanBasin, is an important pegmatite province in China. Somefamous pegmatite type deposits occur in the SGFB,including the Xuebaoding, Jiajika, Keeryin rare metaldeposits and Danba muscovite deposit (Li Jiankang et al.,2015).FEI Guangchun TIAN Jingjing YANG Jiyi GAO Jianguo TANG Wenchun LI Jian GU Chenghui 2018Acta Geologica Sinica(English Edition)2018,92,3:5
8Age assignment and geological significance of the “Budate Group” in the Hailar Basin显示文摘Age and nature of the Budate Group in the Hailar Basin are of great significance in studying the evolution of the Hailar Basin and the Xing'an-Mongolian Orogenic Belt(XMOB).Zircon U-Pb ages of eight volcanic rocks from the Budate Group and two basement granites in the Hailar Basin were reported in this study.The dating results indicated that the formation of these volcanic rocks was consistent with the emplacement of Late Paleozoic basement granite in age(356-290 Ma),i.e.,Early Carboniferous to Early Permian rather than Early Mesozoic.Combined with regional geology,it was concluded that the Budate Group is the component of the basement of the Hailar Basin,and these volcanic rocks were formed at an active continental margin,which is related to the closure of the Hegen Mountains suture zone.The captured Neoproterozoic zircons(814-873 Ma) were probably derived from the Neoproterozoic basement materials in the Ergun Block,implying the close genetic relationships between the Ergun Block(including the Hailar Basin) and the Siberian Block.MENG Qi'An WAN ChuanBiao ZHU DeFeng ZHANG YanLong GE WenChun WU FuYuan 2013Science China Earth Sciences2013,56,6:4
9INFLUENCE OF ANTIDROM IC ELECTRIC STIM ULATI ON ONPREPROTACHYKININ m RNA EXPRESSION IN ADJACENT DORSAL ROOT GANGLIA OF RATS显示文摘By in situ hybridization histochemistry, the changes of preprotachykinin (PPT) mRNA expression were examined in the neurons of adjacent thoracal dorsal root ganglion (DRG) after a strong electric stimulation to an intact dorsal cutaneous branch and the cut distal part of left T 9 thoracal spinal nerve of rat. There was a significant increase of the number of neurons expressing PPT mRNA in the ipsilateral T 8, T 9 and T 10 DRG of the animals given electric stimulation to intact spinal nerve branch 24 h after the electric stimulation. The same increase was found in the ipsilateral T 8 and T 10 DRG of the animals given electric stimulation to the distal part of spinal nerve branch. While no change was found in the DRG of the contralateral side of these animals. The present results showed that the antidromic electric stimulation strengthened the biosynthesis of PPT mRNA in adjacent DRG. These findings suggested that there was information transmission across segments between two sensory nerve endings and some bioactive substances such as SP might play important roles in the information transmission across segments of spinal cord.Li Xiuhua,Zhao Yan,Shi Wenchun,Li XinminFirst Affiliated Hospital,Wang Huisheng Research Center of Neurobiology, Xi′an Medical University, Xi′an 710061 1999Journal of Pharmaceutical Analysis1999,13,2:2
10APPLICATION OF CIRCUIT SIMULATION IN HARDWARE DESIGN FOR ELECTRONIC CONTROL HIGH PRESSURE COMMON-RAIL FUEL SYSTEM OF DIESEL ENGINE显示文摘By means of circuit simulation, hardware of electronic control unit (ECU) of high pressure common-rail electronic control fuel system for diesel engine is designed. According to the system requirements for hardware of ECU, signal-processing circuit of variable reluctance (VR) sensor, filter circuit for input signal, high voltage power circuit and driver and protection circuit of solenoid are simulated as emphases. Difficulties of wide scope of VR sensor output signal, efficiency of high voltage power and reliable and swift driver of solenoid are solved. The results of simulation show that the hardware meets the requirement of the fuel system. At the same time, circuit simulation can greatly increase quality of the design, alleviate design labor and shorten design time.Tan Wenchun Yu Shitao Yang Lin Zhuo Bin 2005Chinese Journal of Mechanical Engineering2005,18,4:2
11Generation of Nb-enriched mafic rocks and associated adakitic rocks from the southeastern Central Asian Orogenic Belt:Evidence of crust-mantle interaction显示文摘Melting of subducting oceanic lithosphere and associated melt-mantle interactions in convergent plate margins require specific geodynamic environment that allows the oceanic slab to be abnormally heated.Here we focus on the Early Mesozoic mafic rocks and granite porphyry,which provide insights into slab melting processes associated with final closure of the Paleo-Asian Ocean.The granite porphyry samples are calc-alkaline and distinguished by high Sr contents,strong depletion of heavy rare earth elements,resulting in high(La/Yb);and Sr/Y ratios,and negligible Eu anomalies.Based on their high Na_(2)O and Mg O,low K_(2)O contents,positiveε_(Hf)(t)andε_(Nd)(t)and low(^(87)Sr/^(86)Sr)ivalues,we propose that the granite porphyry was likely derived from partial melting of subducting Paleo-Asian oceanic crust.The Nb-enriched mafic rocks are enriched in Rb,Th,U,Pb and K,and depleted in Nb,Ta,Ba,P and Ti,corroborating a subduction-related origin.Their heterogeneous Sr-Nd-Hf-O isotopic compositions and other geochemical features suggest that they were likely derived from partial melting of peridotitic mantle wedge interacted with oceanic slab-derived adakitic melts.Trace element and isotope modeling results and elevated zirconδ^(18)O values suggest variable subducting sediments input into the mantle wedge,dominated by terrigenous sediments.Synthesizing the widely-developed bimodal rock associations,conjugated dikes,thermal metamorphism,tectonic characteristics,paleomagnetic constraints,and paleogeographical evidence along the Solonke-Changchun suture zone,we identify a slab window triggered by slab break-off,which accounts for slab melting and formation of the Nb-enriched mafic rocks and associated adakitic granite porphyry in southeastern Central Asian Orogenic Belt.Yan Jing Wenchun Ge M.Santosh Yu Dong Hao Yang Zheng Ji Junhui Bi Hongying Zhou Dehe Xing 2022Geoscience Frontiers2022,13,2:2
12The Effect of Filler Metal Thickness on Residual Stress and Creep for Stainless-Steel Plate-Fin Structure显示文摘Jiang Wenchun Gong Jianming Chen Hu 2008International Journal of Pressure Vessels and Piping2008,85,8:1
13Arsenic emission during combustion of high arsenic coals from southwestern Guizhou, China显示文摘Zhao Yongehun Zhang Junying Huang Wenchun 2008Energy Conversion and Management2008,49,:1
14Ar- senic emission during combustion of high arsenic coals from Southwestern Guizhou, China显示文摘Yongchun Zhao Junying Zhang Wenchun Huang 2008Energy Conversion and Management2008,49,:1
15Effect of Geometric Conditions on Residual Stress of Brazed Stainless Steel Plate-Fin Structure显示文摘Jiang Wenchun Gong Jiangming Tu Shan-Tung 2008Nuclear Engineering and Design2008,238,7:1
16Modelling of temperature field and residual stress of vacuum brazing for stainless steel plate-fin structure 显示文摘Jiang Wenchun Gong Jianming Tu Shandong 2009Journal of Materials Processing Technology In Press2009,209,2:1
17Three-dimensional simulation to study the influence of foil thickness on residual stress in the bonded compliant seal design of planar solid oxide fuel cell显示文摘Jiang Wenchun Zhang Yucai Woo Wanchuck 2012Journal of Power Sources2012,209,1:1
18Using heat sink technology to decrease residual stress in 316L stainless steel welding joint: Finite element simulation显示文摘Wenchun Jiang Yucai Zhang Wanchuck Woo 2012International Journal of Pressure Vessels and Piping2012,92,:1
19Antiproliferative and chemopreventive effects of adlay seed on lung cancer in vitro and in vivo显示文摘CHANG Huichiu HUANG Yuchun HUNG Wenchun 2003Agric Food Chem2003,51,12:1
20A Fixed-Threshold Approach to Generate High-Resolution Vegetation Maps for IKONOS Imagery显示文摘Cheng Wenchun Chang J C Chang C P 2008Sensors2008,8,:1
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