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青藏高原北缘伸展构造对金矿形成的控制作用及其成矿时代探讨

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矿床地质 2002年第S1期21卷 97-100页

作者：陈宣华杨风 george e.gehrels 王小凤陈柏林陈正乐杨懿李学智中国地质科学院地质力学研究所北京100081 新疆地质调查院一所新疆乌鲁木齐830011 Department of Geosciences University of Arizona

青藏高原北缘阿尔金山东北段大平沟金矿床是受eW向伸展构造(拉配泉正断层)控制的韧性剪切带型金矿床。本文阐明了大平沟金矿床地质特征和矿床成因,并利用锆石TIMS法和离子探针U-Pb定年方法、40Ar/39Ar阶段加温测年和MDD模拟方法,分析了... 详细信息

青藏高原北缘阿尔金山东北段大平沟金矿床是受eW向伸展构造(拉配泉正断层)控制的韧性剪切带型金矿床。本文阐明了大平沟金矿床地质特征和矿床成因,并利用锆石TIMS法和离子探针U-Pb定年方法、40Ar/39Ar阶段加温测年和MDD模拟方法,分析了与金矿床有关的岩浆作用和伸展构造的活动时代。结果表明,与大平沟金矿床有关的花岗岩浆活动的时代为早奥陶世(485Ma),而金矿床的控矿构造(拉配泉正断层)的活动时代为早侏罗世(200～187Ma期间)。由此可见早古生代岩浆活动为青藏高原北缘的金矿化提供了物质来源,而中生代伸展作用直接控制了金矿化,金的成矿时代为早侏罗世。

关键词：伸展作用金矿床成矿时代青藏高原北缘

青藏高原北缘中生代伸展构造^(40)Ar/^(39)Ar测年和MDD模拟

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地球学报 2002年第4期23卷 305-310页

作者：陈宣华尹安 george e.gehrels 王小凤 eric S.Cowgill Marty Grove T.Mark Harrison 陈正乐中国地质科学院地质力学研究所北京100081 Department of earth and Space Sciences and Institute of Geophysics and Planetary Physics University of California Department of Geosciences University of Arizona

沿着青藏高原北缘的阿尔金山脉东段 ,发育了长度大于 30 0km、eW走向的拉配泉断裂。中美合作阿尔金课题组的地质填图结果表明 ,该断层实际上是一条南倾的正断层 ,局部倾角可以低至 30°以下。沉积学和热年代学研究控制了拉配泉断裂的活... 详细信息

沿着青藏高原北缘的阿尔金山脉东段 ,发育了长度大于 30 0km、eW走向的拉配泉断裂。中美合作阿尔金课题组的地质填图结果表明 ,该断层实际上是一条南倾的正断层 ,局部倾角可以低至 30°以下。沉积学和热年代学研究控制了拉配泉断裂的活动时代 :早—中侏罗统地层可以解释为断裂上盘的伸展盆地沉积 ;下盘岩石中钾长石40 Ar/ 3 9Ar测年和MDD模拟给出 2个阶段的冷却事件 ,早期事件出现在约 2 2 0～ 187Ma之间 ,晚期事件出现在早白垩世晚期 (约 10 0Ma)。早期事件代表了拉配泉断裂正断作用的主要阶段。

关键词：青藏高原阿尔金山拉配泉断裂 ^40Ar/^39Ar测年 MDD模拟氩同位素中生代

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阿尔金山区域热演化历史的初步研究

地质论评 2002年第S1期48卷 146-152页

作者：陈宣华尹安高荐 george e.gehrels 陈正乐王小凤 eric S.COWGILL Marty GROVe T.Mark HARRISON 中国地质科学院地质力学研究所北京100081 Department of earth and Space Sciences and Institute of Geophysics and Planetary Physics University of California 中国石油股份公司青海油田分公司甘肃敦煌736202 Department of Geosciences University of Arizona Department of earth and Space Sciences and Institute of Geophysics and Planetary Physics

通过地质年龄数据的综合分析,本文探讨了阿尔金山地区自元古宙以来的区域热演化历史。其中,本区自古太古代以来具有多期岩浆活动,其主要活动时期为早古生代晚期(490～385 Ma),高峰期年龄为442Ma左右。同时,具有新元古代、早古生代、中... 详细信息

通过地质年龄数据的综合分析,本文探讨了阿尔金山地区自元古宙以来的区域热演化历史。其中,本区自古太古代以来具有多期岩浆活动,其主要活动时期为早古生代晚期(490～385 Ma),高峰期年龄为442Ma左右。同时,具有新元古代、早古生代、中生代和新生代4次地壳抬升和冷却事件。其中中生代冷却事件启动时间与阿尔金北缘伸展作用早期活动时间相一致;新生代事件出现在7 Ma左右,与青藏高原隆升具有密切关系。

关键词：阿尔金山热年代学演化阶段

Flexible ultra-thin super-resolution endoscopy

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Science China(Physics,Mechanics & Astronomy) 2024年第3期67卷 171-172页

作者： george S.D.Gordon Department of electrical and electronic engineering University of NottinghamNottingham NG7 2RDUK

In recent years, multimode fiber(MMF) has become an important tool for high-resolution endoscopic imaging in narrow channels(e.g., in the brain via needles or inside blood vessels) due to its high mode density and fine diameter, typically ever, a major obstacle to widespread deployment in applications is that realistic perturbations, including bending, twisting and changes in temperature, cause unacceptable image degradation.

关键词： fiber resolution typically

Septic cardiomyopathy phenotype in the critically ill may depend on antimicrobial resistance

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Journal of Intensive Medicine 2024年第3期4卷 355-361页

作者： Vasiliki Tsolaki Kyriaki Parisi george e.Zakynthinos efrosini Gerovasileiou Nikitas Karavidas Vassileios Vazgiourakis epaminondas Zakynthinos Demosthenes Makris Intensive Care Unit University Hospital of LarissaUniversity of Thessaly Faculty of MedicineLarissaGreece Third Cardiology Clinic University of AthensSotiria HospitalAthensGreece Respiratory Department University Hospital of LarissaUniversity of Thessaly Faculty of MedicineLarissaGreece

Background Sepsis is a life-threatening organ dysfunction,and septic cardiomyopathy(SCM)may complicate the course of the *** with multidrug-resistant(MDR)pathogens has been linked with worse *** study aims to evaluate SCM in patients with infections caused by different antimicrobial-resistant *** This retrospective study included patients with sepsis/septic shock,hospitalized,and intubated in the intensive care unit of the University Hospital of Larissa between January 2022 and September 2023 with echocardiographic data during the first two days after infection *** patients were divided into two groups:non-MDR-SCM group and MDR-SCM *** cardiac function was compared between the two *** A total of 62 patients were included in the ***-four patients comprised the MDR-SCM and 18 the non-MDR-SCM ***-six patients(41.9%)presented with left ventricular(LV)systolic dysfunction,and≤35%right ventricular fractional area change(RVFAC)was present in 56.4%.LV systolic function was more severely impaired in the non-MDR-SCM group(left ventricular ejection fraction,35.8%±4.9%vs.45.6%±2.4%,P=0.049;LV outflow tract velocity time integral,[10.1±1.4]cm vs.[15.3±0.74]cm,P=0.001;LV-Strain,–9.02%±0.9%vs.–14.02%±0.7%,P=0.001).The MDR-SCM group presented with more severe right ventricular(RV)dilatation(right ventricular end-diastolic area/left ventricular end-diastolic area,0.81±0.03 vs.0.7±0.05,P=0.042)and worse RV systolic function(RVFAC,32.3%±1.9%vs.39.6%±2.7%,P=0.035;tricuspid annular plane systolic excursion,[15.9±0.9]mm vs.[18.1±0.9]mm,P=0.165;systolic tissue Doppler velocity measured at the lateral tricuspid annulus,[9.9±0.5]cm/s vs.[13.1±0.8]cm/s,P=0.002;RV-strain,–11.1%±0.7%vs.–15.1%±0.9%,P=0.002).Conclusion SCM related to MDR infection presents with RV systolic dysfunction predominance,while non-MDR-SCM is mainly depicted with LV systolic dysfunction impairment.

关键词： Septic cardiomyopathy Multidrug-resistant pathogen Left ventricular failure Right ventricular dysfunction Left/right ventricular longitudinal strain Ventriculoarterial Coupling

Multifunctional nanoparticle-mediated combining therapy for human diseases

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Signal Transduction and Targeted Therapy 2024年第2期9卷 343-375页

作者： Xiaotong Li Xiuju Peng Makhloufi Zoulikha george Frimpong Boafo Kosheli Thapa Magar Yanmin Ju Wei He School of Pharmacy China Pharmaceutical UniversityNanjing 2111198PR China Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410013PR China Shanghai Skin Disease Hospital Tongji University School of MedicineShanghai 200443China

Combining existing drug therapy is essential in developing new therapeutic agents in disease prevention and *** preclinical investigations,combined effect of certain known drugs has been well established in treating extensive human *** to synergistic effects by targeting various disease pathways and advantages,such as reduced administration dose,decreased toxicity,and alleviated drug resistance,combinatorial treatment is now being pursued by delivering therapeutic agents to combat major clinical illnesses,such as cancer,atherosclerosis,pulmonary hypertension,myocarditis,rheumatoid arthritis,inflammatory bowel disease,metabolic disorders and neurodegenerative *** therapy involves combining or co-delivering two or more drugs for treating a specific ***(NP)-mediated drug delivery systems,i.e.,liposomal NPs,polymeric NPs and nanocrystals,are of great interest in combinatorial therapy for a wide range of disorders due to targeted drug delivery,extended drug release,and higher drug stability to avoid rapid clearance at infected *** review summarizes various targets of diseases,preclinical or clinically approved drug combinations and the development of multifunctional NPs for combining therapy and emphasizes combinatorial therapeutic strategies based on drug delivery for treating severe clinical ***,we discuss the challenging of developing NP-codelivery and translation and provide potential approaches to address the *** review offers a comprehensive overview for recent cutting-edge and challenging in developing NP-mediated combination therapy for human diseases.

关键词： drugs diseases prevention

Bulk geochemistry,Rb-Sr,Sm-Nd,and stable O-H isotope systematics of the Metzimevin high-grade iron ore deposit,Mbalam iron ore district,southern Cameroon

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Acta Geochimica 2024年第4期43卷 677-706页

作者： Samndong Cyril Tufoin Cheo emmanuel Suh Tabod Charles Tabod george Lemewihbwen Ngiamte Department of Geology Mining and Environmental ScienceThe University of BamendaB.P.39BambiliNorth West RegionCameroon economic Geology Unit Department of GeologyUniversity of BueaP.O.63BueaSouth West RegionCameroon Department of Physics Faculty of ScienceThe University of BamendaB.P.39BambiliNorth West RegionCameroon Department of Geology Pan-African University Life and Earth Sciences Institute(PAULESI)University of IbadanIbadanNigeria

Bulk geochemistry,Sr,Nd,and O-H isotope systematics are reported for the first time on banded iron formation(BIF)-hosted high-grade iron ore at the northwestern segment of Congo Craton(CC).Located in Mbalam iron ore district,Southern Cameroon,Metzimevin iron ore deposit is a hematite-magnetite BIF system,dominated by SiO_(2)+Fe_(2)O_(3)(97.1 to 99.84 wt%),with low concentrations of clastic elements e.g.,Al_(2)O_(3),TiO_(2),and HFSe,depicting a nearly pure chemical *** Ree+Y signature of the iron deposit displays strong positive eu anomaly,strong negative Ce anomaly,and chondritic to superchondritic Y/Ho ratios,suggestive of formation by mixed seawater-high temperature hydrothermal fluids in oxidising ***^(87)Sr/^(86)Sr ratios of the BIF are higher than the maximum^(87)Sr/^(86)Sr evolution curves for all Archean reservoirs(bulk silicate earth,Archean crust and Archean seawater),indicating involvement of continentally-derived components during BIF formation and ***Ɛ_(Nd)(t)(+2.26 to+3.77)and Nd model age indicate that chemical constituents for the BIF were derived from undifferentiated crustal source,between 3.002 and 2.88 *** variable and diverse O and H isotope data(−1.9‰to 17.3‰and−57‰to 136‰respectively)indicate that the Metzimevin iron ore formed initially from magmatic plumes and later enriched by magmatic-metamorphic-modified meteoric *** balance calculations indicate mineralisation by combined leaching and precipitation,with an average iron enrichment factor of>2.67 and SiO_(2)depletion factor of>*** is associated with an overall volume reduction of 28.27%,reflecting net leaching and volume collapse of the BIF protholith.

关键词： Bulk geochemistry Rb-Sr Sm-Nd Mitzimevin High-grade iron ore

A Revealing Voyage Visit to China dispels misperceptions,shows the real picture of China-Africa friendship

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ChinAfrica 2024年第9期16卷 62-63页

作者： george MUSIIMe Development Watch Centre Nigeria

It is very easy for an African living in Africa to be misled into believing that the China-Africa friendship is *** fact,with so much of information reaching Africa about China-Africa cooperation being targeted at undermining the friendly relations enjoyed by the two sides and the e!orts to build a China-Africa community with a shared future,this in a way is not surprising.

关键词： Africa superficial friends

Feeding behavior and hormoligosis associated with imidacloprid resistance in Asian citrus psyllid,Diaphorina citri

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Insect Science 2024年第4期31卷 1211-1221页

作者： Xue Dong Chen Justin george Lauren M.Diepenbrock Hunter Gossett Guoping Liu Jawwad A.Qureshi Lukasz L.Stelinski entomology and Nematology Department University of FloridaCitrus Research and Education CenterLake AlfredFloridaUSA Southern Insect Management Research Unit USDA-ARSStonevilleMississippiUSA entomology and Nematology Department University of FloridaSouthwest Florida Research and Education CenterImmokaleeFloridaUSA

Imidacloprid is a neonicotinoid insecticide used for managing the Asian citrus psyllid,Diaphorina citri Kuwayama,which serves as vector of phytopathogens causing citrus ***,development of resistance to neonicotinoids among populations of *** has coincided with occasional control failures in the *** objectives of this research were to(1)survey current levels of imidacloprid resistance in Florida citrus;(2)compare feeding behavior between imidacloprid-resistant and susceptible *** using electrical penetration graph recordings,and(3)investigate the possible amplification of insecticide hormoligosis associated with *** surveys confirmed that the susceptibility of *** populations to imidacloprid has decreased in commercial Florida citrus groves compared with a laboratory-susceptible *** 12 generations of selection,resistance to imidacloprid increased by 438 fold compared with the susceptible ***-susceptible *** feeding on citrus exhibited significantly more bouts associated with intercellular pathway(C),phloem penetration(D),phloem salivation(e1),and nonprobing(Np)activities than imidacloprid-resistant ***,there were no differences observed in the frequency or duration of phloem ingestion or xylem feeding between susceptible and resistant *** was no statistical difference in fecundity between resistant and susceptible ***,the fecundity of imidacloprid-susceptible female *** treated with a sublethal concentration of imidacloprid(LC_(25))increased significantly compared with controls,while such hormoligosis was less pronounced among imidacloprid-resistant *** results suggest that imidacloprid-resistant psyllids may cease feeding sooner than susceptible counterparts following sublethal exposure to this insecticide,indicative of a behavioral resistance mechanism.

关键词： artificial selection electrical penetration graph feeding behavior hormoligosis insecticide resistance sublethal exposure