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1Surgical outcome after docetaxel-based neoadjuvant chemotherapy in locally-advanced gastric cancer显示文摘AIM:To investigate feasibility,morbidity and surgical mortality of a docetaxel-based chemotherapy regimen randomly administered before or after gastrectomy in patients suffering from locally-advanced resectable gastric cancer.METHODS:Patients suffering from locally-advanced(T3-4 any N M0 or any T N1-3 M0)gastric carcinoma,staged with endoscopic ultrasound,bone scan,computed tomography,and laparoscopy,were assigned to receive four 21 d/cycles of TCF(docetaxel 75 mg/m 2 day 1,cisplatin 75 mg/m 2 day 1,and fluorouracil 300 mg/m 2 per day for days 1-14),either before(Arm A)or after(Arm B)gastrectomy.Operative morbidity,overall mortality,and severe adverse events were compared by intention-to-treat analysis.RESULTS:From November 1999 to November 2005,70 patients were treated.After preoperative TCF(Arm A),thirty-two(94%)resections were performed,85% of which were R0.Pathological response was complete in 4 patients(11.7%),and partial in 18(55%).No surgical mortality and 28.5%morbidity rate were observed,similar to those of immediate surgery arm(P= 0.86).Serious chemotherapy adverse events tended to be more frequent in arm B(23%vs 11%,P=0.07),with a single death per arm.CONCLUSION:Surgery following docetaxel-based chemotherapy was safe and with similar morbidity to immediate surgery in patients with locally-advanced resectable gastric carcinoma.Roberto Biffi Nicola Fazio Fabrizio Luca Antonio Chiappa Bruno Andreoni Maria Giulia Zampino Arnaud Roth Jan Christian Schuller Giancarla Fiori Franco Orsi Guido Bonomo Cristiano Crosta Olivier Huber 2010World Journal of Gastroenterology2010,16,7:43
2Tectonic evolution of the Dabieshan orogen: In the view from polyphase deformation of the Beihuaiyang metamorphic zone显示文摘The Beihuaiyang metamorphic zone was formed by the Early Mesozoic collision of the North and South China Blocks. It consisted of the Foziling and Luzhenguan complexes and was thought to have never afforded a deep subduction. A similar feature of the deformation in the Dabieshan UHP metamorphic rocks implies that these different tectonic units share the same geodynamic background. The early stage of deformation can be preserved on account of their relatively shallower subduction than that for UHP rocks. On the basis of an analysis of the geo- logical structure and geochronological results, five deformational stages have been recognized: a D1-Early compressional deformation which represents the continental subduction; a D2-Early exhumation deformation producing a syn-convergence exhumation; a D3-Main deformation, represented by an exhumation deformation with Late Triassic age; a D4-Doming and its margin extensional gravity collapse deformation and finally a D5-regional extensional deformation of Cretaceous that was mostly introduced by the migmatization and plutonism.LIN Wei1, 2, Faure Michel3, WANG Qingchen1 & Arnaud Nicolas4 1. LTE, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China 2. Department of Earth and Planetary Sciences, Graduate School of Science, Nagoya University, Japan 3. ISTO, UMR CNRS 6113, Batiment Géosciences, Orléans Université d’Orléans, 45067 Orléans Cedex 2, France 4. UMR 6524 'Magmas et Volcans', 5 Rue Kessler, 63000 Clermont-Ferrand, France 2005Science China Earth Sciences2005,48,7:25
3喀喇昆仑断裂的形成时代:锆石SHRIMP U-Pb年龄的制约显示文摘喀喇昆仑断裂的形成时代对青藏高原形成演化、变形过程的研究具有重要意义.在断裂东南段阿伊拉日居山地区,沿断裂出露具高温右旋剪切应变特征的糜棱岩和糜棱岩化片麻岩-花岗岩,因此,利用变形岩石中锆石的SHRIMP U-Pb年龄来制约断裂的形成时代和变形历史.变形岩石中同构造结晶锆石的U-Pb同位素年龄,暗示了喀喇昆仑断裂的形成时代至少为距今约27Ma以前,比前人观点至少早约10Ma;大规模的高温右旋剪切活动至少在距今27~20Ma期间,并且伴随同构造淡色花岗岩的产生;剪切变形过程中伴随大量热液流体作用时限至少在距今25-13Ma期间.喀喇昆仑断裂的生长可能是由南东向北西扩展的过程,是印度板块与欧亚大陆持续碰撞的结果.李海兵 Franck Valli 刘敦一 许志琴 杨经绥 Nicolas Arnaud Paul Tapponnier Robin Lacassin 陈松永 戚学祥 2007科学通报2007,52,4:26
4On the Controllability of an Advection-diffusion Equation with Respect to the Diffusion Parameter:Asymptotic Analysis and Numerical Simulations显示文摘The advection-diffusion equation y_t~ε-εy_(xx)~ε+ M y_x~ε= 0,(x, t) ∈(0, 1) ×(0, T) is null controllable for any strictly positive values of the diffusion coefficient ε and of the controllability time T. We discuss here the behavior of the cost of control when the coefficient ε goes to zero, according to the values of T. It is actually known that this cost is uniformly bounded with respect to ε if T is greater than a minimal time T_M, with T_M in the interval [1, 2×3^(1/2)]/M for M > 0 and in the interval [2×2^(1/2), 2(1 +3^(1/2))]/|M | for M < 0. The exact value of TM is however unknown.We investigate in this work the determination of the minimal time T_M employing two distincts but complementary approaches. In a first one, we numerically estimate the cost of controllability, reformulated as the solution of a generalized eigenvalue problem for the underlying control operator, with respect to the parameter T and ε. This allows notably to exhibit the structure of initial data leading to large costs of control. At the practical level, this evaluation requires the non trivial and challenging approximation of null controls for the advection-diffusion equation. In the second approach, we perform an asymptotic analysis, with respect to the parameter ε, of the optimality system associated to the control of minimal L^2-norm. The matched asymptotic expansion method is used to describe the multiple boundary layers.Youcef AMIRAT Arnaud MNCH 2019Acta Mathematicae Applicatae Sinica2019,35,1:18
5毛竹节间材与节部材的构造与强度差异研究显示文摘竹节是竹子为适应其生存环境长期择优演化而形成的特殊构造,它对提高细长竹子的刚度与稳定性至关重要。但在竹的利用中,竹节对竹材的力学强度是否会有影响,说法不一。现以毛竹为研究对象,在比较了竹节间材和竹节之间的构造差异的基础上,以竹青、竹黄、竹节未处理和已刨平处理的两种试件形式,分析研究了毛竹的含节材与不含节的节间材在强度上的差异。结果表明,无论是自然状态下的竹材试件,还是刨去刨平青、黄、节的竹材试件,竹节对弯曲强度、顺纹剪切强度、抗压强度等力学性能均未见有降低的作用,相反还有着不同程度的增强作用。但竹节对竹材顺纹抗拉强度有着不可忽视的降低影响。邵卓平 黄盛霞 吴福社 周亮 Clement. Arnaud 2008竹子研究汇刊2008,27,2:16
6喀喇昆仑断裂带走滑过程中伴随的快速隆升作用:热年代学证据显示文摘喀喇昆仑断裂带是青藏高原西部的一条大型右旋走滑断裂带,它是喜马拉雅山脉西段北侧重要的地质边界。本文在岩石学、变形构造的研究基础上,对喀喇昆仑断裂带东南段阿伊拉日居山—噶尔盆地地区的喀喇昆仑韧性剪切带中变质岩石的同构造矿物进行了^(40)Ar/^(39)Ar热年代学研究。显微构造研究表明,剪切带中的矿物记录了从高温(>600℃)到低温(<250℃)条件下的连续变形,表现为近水平的右旋剪切运动转变成斜向的右旋正滑,使绿片岩相的变形作用叠加在中-高温变形之上,暗示出走滑过程中存在隆升作用,热年代学结果显示其连续剪切变形作用从早中新世以来至少持续到4Ma,并且出现三个快速冷却阶段:第一个快速冷却阶段为从25~22Ma 到21~18Ma 期间,可能代表的是浅部高温剪切过程中变形局部停止或减慢的过程;第二个快速冷却时期为从15Ma 到12~10Ma,是喀喇昆仑断裂带走滑过程中,阿伊拉日居山的快速隆升、噶尔盆地开始形成以及主要河流深切过程阶段;9Ma 以来是第三个快速冷却过程,使阿伊拉日居山脉进一步快速隆升、噶尔盆地定形过程。根据不同年代地表地貌特征的右旋错位距离以及不同层次变形特征,估算出喀喇昆仑断裂带长期滑移速率为8~10mm/a,伴随的隆升速率为1mm/a。从显微构造和热年代学证据表明,晚第四纪以来该断裂经历了强烈的右旋走滑运动的同时伴随强烈的隆升作用。李海兵 VALLI Franck ARNAUD Nicolas 陈松永 许志琴 TAPPONNIER Paul LACASSIN Robin 司家亮 邱祝礼 2008岩石学报2008,24,7:14
7Recommendations for liver transplantation for hepatocellular carcinoma: an international consensus conference report显示文摘Pierre-Alain Clavien Mickael Lesurtel Patrick MM Bossuyt Gregory J Gores Bernard Langer Arnaud Perrier 2012Lancet Oncology2012,,1:13
8Brain edema and intracranial hypertension in fulminant hepatic failure:Pathophysiology and management显示文摘Intracranial hypertension is a major cause of morbidity and mortality of patients suffering from fulminant hepatic failure. The etiology of this intracranial hypertension is not fully determined, and is probably multifactorial, combining a cytotoxic brain edema due to the astrocytic accumulation of glutamine, and an increase in cerebral blood volume and cerebral blood flow, in part due to inflammation, to glutamine and to toxic products of the diseased liver. Validated methods to control intracranial hypertension in fulminant hepatic failure patients mainly include mannitol, hypertonic saline, indomethacin, thiopental, and hyperventilation. However all these measures are often not sufficient in absence of liver transplantation, the only curative treatment of intracranial hypertension in fulminant hepatic failure to date. Induced moderate hypothermia seems very promising in this setting, but has to be validated by a controlled, randomized study. Artificial liver support systems have been under investigation for many decades. The bioartificial liver, based on both detoxification and swine liver cells, has shown some efficacy on reduction of intracranial pressure but did not show survival benefit in a controlled, randomized study. The Molecular Adsorbents Recirculating System has shown some efficacy in decreasing intracranial pressure in an animal model of liver failure, but has still to be evaluated in a phase Ⅲ trial.Olivier Detry Arnaud De Roover Pierre Honoré Michel Meurisse 2006World Journal of Gastroenterology2006,12,46:12
9日晕测量与日晕光度计外缘杂散光抑制试验显示文摘为配合大型太阳设备西部选址工作,研制了一架现代日晕光度计(Sky Brightness Monitor,SBM).前期实验对日晕光度计性能进行了测试,同时积累了云南部分址点的日晕数据.资料分析结果显示,轿子雪山正午前后的日晕水平最低可至日面中心强度百万分之几的量级(蓝波段).这表明该日晕光度计内部杂散光水平已达到了国际同类产品的标准.日晕光度计的内部杂散光源主要来自两部分:镜筒前端中性滤光片(ND4)固定套圈的边缘衍射(视场靠内区域)和镜筒内置光阑的边缘衍射(视场靠外区域).针对后者进行的变换光阑孔径大小试验结果证实,适当缩小光阑孔径可有效减小数据中视场靠外区域的衍射光干扰.刘念平 刘煜 申远灯 张雪飞 曹文达 Arnaud Jean 2011天文学报2011,52,2:11
10Preoperative rectosigmoid endoscopic ultrasonography predicts the need for bowel resection in endometriosis显示文摘BACKGROUND Rectosigmoid endometriosis is an underdiagnosed disease responsible for abdominal pain, transit disorders and rectal bleeding. Two surgical approaches,rectosigmoid bowel resection(segmental or patch) or intramuscular layer dissection(shaving), are available.AIM To assess whether the lesion features observed via preoperative rectosigmoid endoscopic ultrasonography(RS-EUS) might predict the need for bowel resection.METHODS This multicentric retrospective study was conducted on patients with rectosigmoid endometriosis who underwent a curative surgical procedure,evaluated by RS-EUS performed by two trained operators, between January 2012 and March 2018. A univariate statistical analysis was performed on nodules' RSEUS features(thickness, width, infiltration of the submucosae, presence of a bump into the digestive lumen and presence of multiple rectosigmoid localizations). A multivariate logistic regression was then performed on the significant results.RESULTS Of the 367 patients, 73 patients with rectosigmoid endometriosis were evaluated by RS-EUS and underwent rectosigmoid surgery. After the univariate analysis was completed, thickness, width and infiltration of the submucosae were identified as potential predictive factors for bowel resection. In a multivariate logistic regression model, only thickness appeared to be a significant [odds ratio(OR) = 1.49, 95% confidence interval(CI): 1.04-2.12, P = 0.028] predictive factor for bowel resection. Receiver operating characteristic analysis performed showed that a thickness over 5.20 mm might be used as cut-off with a sensitivity of 76%, a specificity of 81%, and an area under carve = 0.82. The cut-off values for 100%sensitivity and 100% specificity were 0.90 mm and 10.00 mm, respectively. A trend concerning width to predict the need for resection was also observed(OR1.12, 95%CI: 1.00-1.26, P = 0.054)CONCLUSION The presence of a rectosigmoid nodule of endometriosis greater than 5.20 mm thick on RS-EUS might predict the need for bowel resection.Victor Desplats René-Louis Vitte Joseph du Cheyron Gilles Roseau Arnaud Fauconnier Frédérick Moryoussef 2019World Journal of Gastroenterology2019,25,6:9
11一个熟悉的陌生人:在脂肪质的织物的 SVF 房间的 CD34 表示和通常认为的功能显示文摘 Human adipose tissue obtained by liposuction is easily accessible and an abundant potential source of autologous cells for regenerative medicine applications. After digestion of the tissue and removal of differentiated adipocytes, the so-called stromal vascular fraction (SVF) of adipose, a mix of various cell types, is obtained. SVF contains mesenchymal fibroblastic cells, able to adhere to culture plastic and to generate large colonies in vitro , that closely resemble bone marrow-derived colony forming units-fibroblastic, and whose expanded progeny, adipose mesenchymal stem/stromal cells (ASC), show strong similarities with bone marrow mesenchymal stem cells. The sialomucin CD34, which is well known as a hematopoietic stem cell marker, is also expressed by ASC in native adipose tissue but its expression is gradually lost upon standard ASC expansion in vitro . Surprisingly little is known about the functional role of CD34 in the biology and tissue forming capacity of SVF cells and ASC. The present editorial provides a short introduction to the CD34 family of sialomucins and reviews the data from the literature concerning ex- pression and function of these proteins in SVF cells and their in vitro expanded progeny.Arnaud Scherberich Nunzia Di Maggio Kelly M McNagny 2013World Journal of Stem Cells2013,5,1:8
12Carcinoid tumor of the appendix: A consecutive series from 1237 appendectomies显示文摘AIM: To report the experience of the CHU Sart Tilman, University of Liège, Belgium, in the management of appendiceal carinoid tumor. METHODS: A retrospective review of 1237 appendecto- mies performed in one single centre from January 2000 to May 2004, was undertaken. Analysis of demographic data, clinical presentation, histopathology, operative re- ports and outcome was presented. RESULTS: Among the 1237 appendectomies, 5 appen- diceal carcinoid tumors were identified (0.4%) in 4 male and 1 female patients, with a mean age of 29.2 years (range: 6-82 years). Acute appendicitis was the clinical presentation for all patients. Four patients underwent open appendectomy and one a laparoscopic procedure. One patient was reoperated to complete the excision of mesoappendix. All tumors were located at the tip of the appendix with a mean diameter of 0.6 cm (range: 0.3-1.0 cm). No adjuvant therapy was performed. All patients were alive and disease-free during a mean follow-up of 33 mo. CONCLUSION: Appendiceal carcinoid tumor most of- ten presents as appendicitis. In most cases, it is found incidentally during appendectomies and its diagnosis is rarely suspected before histological examination. Appen- diceal carcinoid tumor can be managed by simple appen- dectomy and resection of the mesoappendix, if its size is ≤ 1 cm.Vincent Tchana-Sato Olivier Detry Marc Polus Albert Thiry Bernard Detroz Sylvie Maweja Etienne Hamoir Thierry Defechereux Carla Coimbra Arnaud De Roover Michel Meurisse Pierre Honoré 2006World Journal of Gastroenterology2006,12,41:8
13医疗保健数据库的安全信号检测方法概述显示文摘近十年,在药品不良反应监测领域,基于医疗保健数据库的安全信号检测方法受到越来越多的关注,已成为弥补自发报告固有局限性的重要手段。目前数据挖掘方法主要基于比值失衡分析法(disproportionality analysis)、传统药物流行病学设计(如自身对照设计)、序列对称分析(sequence symmetry analysis,SSA)、序贯统计检验(sequential statistical testing)、时序关联规则(temporal association rules)、监督机器学习(supervised machine learning,SML)、树状扫描统计量方法(tree-based scan statistic)等。本文从应用场景和实用性角度对医疗保健数据库中安全信号检测方法及其性能进行介绍。王巍巍 张格 杨智荣 马晓洁 孙凤 詹思延(译) Arnaud M Bégaud B Thurin N 2021中国循证医学杂志2021,21,4:8
14Deep learning in nano-photonics:inverse design and beyond显示文摘Deep learning in the context of nano-photonics is mostly discussed in terms of its potential for inverse design of photonic devices or nano-structures. Many of the recent works on machine-learning inverse design are highly specific, and the drawbacks of the respective approaches are often not immediately clear. In this review we want therefore to provide a critical review on the capabilities of deep learning for inverse design and the progress which has been made so far. We classify the different deep-learning-based inverse design approaches at a higher level as well as by the context of their respective applications and critically discuss their strengths and weaknesses. While a significant part of the community’s attention lies on nano-photonic inverse design, deep learning has evolved as a tool for a large variety of applications. The second part of the review will focus therefore on machine learning research in nano-photonics 'beyond inverse design.' This spans from physics-informed neural networks for tremendous acceleration of photonics simulations, over sparse data reconstruction, imaging and 'knowledge discovery' to experimental applications.PETER R.WIECHA ARNAUD ARBOUET CHRISTIAN GIRARD OTTO L.MUSKENS 2021Photonics Research2021,9,5:8
15外源茉莉酸对大豆中异戊烯黄酮Glyceollins及其前体Glycinol累积的影响显示文摘以中黄13号大豆种子为材料,取生长8天的健康子叶,在其表面挖出约2×2mm的伤口,将50μl不同浓度的茉莉酸溶液和1mM的硝酸银溶液滴在伤口处,黑暗中(25℃)保温不同时间后取样,经甲醇提取,用高压液相色谱(HPLC)测定其中异戊烯化异黄酮glyceollins及其前体glycinol 的累积情况.结果显示,健康子叶中没有glyceollins和glycinol的累积,1mM硝酸银比茉莉酸具有更强的诱导glyceollins和glycinol累积的能力,glyceollins的累积与茉莉酸浓度呈负相关.在各种处理中,glyceollinⅠ、Ⅱ、Ⅲ所占比例分别为:50%~80%、10%~40%和10%~20%,但是glyceollin三种异构体的比例随保温时间的延长而有所变化,glyceollin Ⅰ比例逐渐下降,glyceollin Ⅱ所占比例逐渐升高,在1mM硝酸银处理的子叶中表现更为明显.乞永艳 Arnaud Bovy Ricde Vos 唐益雄 2005大豆科学2005,24,4:7
16High tacrolimus intra-patient variability is associated with graft rejection,and de novo donor-specific antibodies occurrence after liver transplantation显示文摘AIM To investigate the role of tacrolimus intra-patient variability(IPV) in adult liver-transplant recipients.METHODS We retrospectively assessed tacrolimus variability in a cohort of liver-transplant recipients and analyzed its effect on the occurrence of graft rejection and de novo donor-specific antibodies(dn DSAs), as well as graft survival during the first 2 years posttransplantation. Between 02/08 and 06/2015, 116 patients that received tacrolimus plus mycophenolate mofetil(with or without steroids) were included. RESULTS Twenty-two patients(18.5%) experienced at least one acute-rejection episode(BPAR). Predictive factors for a BPAR were a tacrolimus IPV of > 35% [OR = 3.07 95%CI(1.14-8.24), P = 0.03] or > 40% [OR = 4.16(1.38-12.50), P = 0.01), and a tacrolimus trough level of < 5 ng/mL [OR=3.68(1.3-10.4), P =0.014]. Thirteen patients(11.2%) developed at least one dn DSA during the follow-up. Tacrolimus IPV [coded as a continuous variable: OR = 1.1, 95%CI(1.0-1.12), P = 0.006] of > 35% [OR = 4.83, 95%CI(1.39-16.72), P = 0.01] and > 40% [OR = 9.73, 95%CI(2.65-35.76), P = 0.001] were identified as predictors to detect dn DSAs. IPV did not impact on patient-or graft-survival rates during the follow-up. CONCLUSION Tacrolimus-IPV could be a useful tool to identify patients with a greater risk of graft rejection and of developing a de novo DSA after liverArnaud Del Bello Nicolas Congy-Jolivet Marie Danjoux Fabrice Muscari Laurence Lavayssière Laure Esposito Anne-Laure Hebral Julie Bellière Nassim Kamar 2018World Journal of Gastroenterology2018,24,16:7
17Liver transplantation for acute hepatic failure due to chemotherapy-induced HBV reactivation in lymphoma patients显示文摘Hepatitis B (HBV) reactivation induced by chemotherapy is problem encountered recently in the management of malignant diseases.Chemotherapy-induced HBV reactivation may ultimately lead to terminal acute liver failure.Liver transplantation (LT) currently remains the only definitive treatment option for such cases,but is generally denied to patients suffering from malignancy.Here,the authors describe 2 cases of cancer-free and HBV graft re-infection-free survival after LT performed for terminal liver failure arising from HBV reactivation induced by chemotherapy for advanced stage lymphoma.These 2 cases,and some other reports in the literature,may suggest that patients suffering from hematologic malignancies and terminal liver disease can be considered for LT if the prognosis of their hematologic malignancy is good.Timothée Noterdaeme Luc Longrée Christian Bataille Arnaud Deroover Anne Lamproye Jean Delwaide Yves Beguin Pierre Honoré Olivier Detry 2011World Journal of Gastroenterology2011,17,25:6
18Donation after cardio-circulatory death liver transplantation显示文摘The renewed interest in donation after cardio-circulatory death (DCD) started in the 1990s following the limited success of the transplant community to expand the donation after brain-death (DBD) organ supply and following the request of potential DCD families. Since then, DCD organ procurement and transplantation activities have rapidly expanded, particularly for nonvital organs, like kidneys. In liver transplantation (LT), DCD donors are a valuable organ source that helps to decrease the mortality rate on the waiting lists and to increase the availability of organs for transplantation despite a higher risk of early graft dysfunction, more frequent vascular and ischemia-type biliary lesions, higher rates of re-listing and re-transplantation and lower graft survival, which are obviously due to theinevitable warm ischemia occurring during the declaration of death and organ retrieval process. Experimental strategies intervening in both donors and recipients at different phases of the transplantation process have focused on the attenuation of ischemia-reperfusion injury and already gained encouraging results, and some of them have found their way from pre-clinical success into clinical reality. The future of DCD-LT is promising. Concerted efforts should concentrate on the identification of suitable donors (probably Maastricht category Ⅲ DCD donors), better donor and recipient matching (high risk donors to low risk recipients), use of advanced organ preservation techniques (oxygenated hypothermic machine perfusion, normothermic machine perfusion, venous systemic oxygen persufflation), and pharmacological modulation (probably a multi-factorial biologic modulation strategy) so that DCD liver allografts could be safely utilized and attain equivalent results as DBD-LT.Hieu Le Dinh Arnaud de Roover Abdour Kaba Séverine Lauwick Jean Joris Jean Delwaide Pierre Honoré Michel Meurisse Olivier Detry 2012World Journal of Gastroenterology2012,18,33:6
19异源表达细菌二氢喋呤合成酶基因提高拟南芥叶酸含量的研究显示文摘植物是人体叶酸的重要来源,人体缺乏叶酸会导致贫血、新生儿神经系统疾病,还与心血管病及某些癌症的发病有关,因此提高食用作物中叶酸的含量是代谢工程的研究目标之一。本研究将从细菌中分离到的编码二氢喋呤合成酶(DHPS)基因FolP,由35S启动子驱动在拟南芥线粒体中过量表达,获得了转基因植株。转基因植株叶酸总含量比野生型对照提高48%,表明DHPS酶对植物叶酸的合成起着调控作用。梁业红 Arnaud Bovy 范云六 2006作物学报2006,32,2:6
20Initial movement of the Karakorum Fault in western Tibet:constraints from SHRIMP U-Pb dating of zircons显示文摘The Karakorum Fault zone(KFZ)plays an important role in understanding the formation,evolvement and deformation of the Tibetan Plateau.The high-T dextral shearing metamorphic rocks,e.g.,mylonites or mylonitized gneisses-granites,locally crop out along the southeastern part of the KFZ in the Ayila Ri’gyüRange area.The SHRIMP U-Pb dating of the syn-kinematic crystallized zircons indicates that the initial age of the KFZ is^27 Ma,~10 Ma older than previous results.The extensive high-T dextral shearing along the KFZ started at least at 27-20 Ma,accompanied by the syn-kinematic emplacement of leuco-granites.Deformation and concomitant fluid circulation during shearing most likely occurred as early as at 25-13 Ma.The KFZ probably grew from southeast to northwest along the fault as a result of continuous convergence between the India plate and Eurasia plate.LI HaiBing Franck VALLI LIU DunYi XU ZhiQin YANG JingSui Nicolas ARNAUD Paul TAPPONNIER Robin LACASSIN CHEN SongYong QI xuexiang 2007Chinese Science Bulletin2007,52,8:6
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