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| 1 | Age of the Miyun dyke swarm:Constraints on the maximum depositional age of the Changcheng System显示文摘A group of NE-trending(~30°)mafic dykes,termed Miyun swarm herein,are distributed around the Miyun Reservoir,northe China,and have individual widths of over 40 m,and lengths of up to 8000 m.Baddeleyite grains were extracted from a~40 wide dyke.Using an isotope dilution thermal ionization mass spectrometry method,these grains yield an average 207Pb/206Pb a of 1731±4 Ma(n=4;or 1731±1 Ma,n=3).Because this dyke is overlain unconformably by conglomerates of the Changzhoug Formation,the lowermost formation of the Changcheng Group,the maximum depositional age of this group is constrained to no earlier than 1731 Ma.This result also suggests that the Changcheng System,with the Changcheng Group as its standard stra graphic section,is younger than 1731 Ma.The Miyun dykes possibly have distinct petrogenesis from the subsequent anorth site-rapakivi intrusions(1730-1680 Ma),which are thought to be responsible for the opening of the Yan-Liao rift,where Changcheng Group was deposited.Thus it is reasonable to set the initial boundary of the Changchengian Period at 1730 Ma slightly younger. | PENG Peng LIU Fu ZHAI MingGuo GUO JingHui | 2012 | Chinese Science Bulletin2012，57，1： | 40 |
| 2 | Sm-Nd age dating of high-pressure granulites and amphi-bolite from Sanggan area,North China craton显示文摘The high pressure (HP) metamorphic age has been dated to HP rocks from the Sanggan area, North China craton. We have got garnet+whole rock isochron ages of (1 842±38) Ma for HP granulite, and (1 856± 26) Ma for HP amphibolite. The Sm-Nd whole rock isochron of HP granulites give out an age of (1870±150) Ma with Nd depleted mantle model age of (2402-2 482) Ma. Considering the Nd isotope homogenization during the peak metamorphism of the HP granulite, Sm-Nd closure temperature and the retention of Nd isotopic memory in garnets partially broken down during decompression, all these isochron ages are thought to be HP metamorphic age. Furthermore, we proposed that the HP metamorphism took place at the end of Paleoproterozoic during the large-scale collision and assembly of the North China craton. | Jinghui Guo Mingguo Zhai | 2001 | Chinese Science Bulletin2001，46，2： | 21 |
| 3 | Effects of preventive acupuncture or moxibustion at the Guanyuan acupoint on expression of interleukin-2 and its receptors in hypothalamus, serum, and uterus of menopausal rats显示文摘BACKGROUND: Previous studies have indicated preventive acupuncture and moxibustion at the Guanyuan point have positive effects on the immune system of menopausal rats. OBJECTIVE: To observe the effects of preventive acupuncture or moxibustion at the Guanyuan point on interleukin-2 (IL-2) and its receptor (IL-2R mRNA) levels in hypothalamus, serum, and uterus of menopausal rats. DESIGN: Randomized control animal experiment. SETTING: School of Acupuncture and Moxibustion, Beijing University of Chinese Medicine. MATERIALS: This study was performed at the Laboratory of Beijing University of Chinese Medicine from November 2004 to July 2005. The vaginal smear method was used to determine the estrus cycle of 9.5-month-old Sprague Dawley (SD) female rats. Three continuous estrus cycles were measured, and 160 rats with estrus cycle disorder, weighing (300 ± 20) g, were included in this study. The rats were randomly divided into four groups: preventive acupuncture group (n =48), preventive moxibustion group (n =48), model groups (n =48), and 10-month-old group (n =16). Sixteen 3.5-month-old healthy SD female rats, weighing (240 ± 20) g, were also assigned to the young group. All rats were clean grade and were purchased from the Laboratory Animal Center, Beijing University of Chinese Medicine. The experiment was in accordance with animal ethics standards. METHODS: Acupuncture was applied to the preventive acupuncture group at 10 months of age. The needle was inserted upward and perpendicularly two fen to a point that was two fen below the Guanyuan point. The rats freely moved around during needle retention (20 minutes). Acupuncture was administered twice a week and continued for eight weeks. A moxa cone (small) moxibustion was applied to the preventive moxibustion group at 10 months of age. The rats were caught gently and kept at the same position as the preventive acupuncture group. The moxa cone was ignited and held to the Guanyuan point directly. Only one moxa cone was used each time. After moxibustion, the local skin turned slightly red. Moxibustion was used twice a week and continued for eight weeks. Nothing except gently catching and lying was administered to the model group and the young group. MAIN OUTCOME MEASURES: Radioimmunoassay, in situ hybridization, and similar methods were employed to detect IL-2 in serum and the uterus, as well as IL-2R mRNA expression in the hypothalamus and uterus arcuate nuclei, of the preventive acupuncture group, preventive moxibustion group, model groups (at 12, 14, and 16 months), 10 month old group (at 10 months), and the young group (at 4 months). RESULTS: All 176 rats were included in the final analysis. ① IL-2R mRNA: IL-2R mRNA expression decreased significantly in the uterus of 12-, 14-, and 16-month-old model groups and in the hypothalamus of 14- and 16-month-old model groups (P < 0.05-0.01). Compared to the same month-aged model groups, the expression of IL-2R mRNA increased significantly in the hypothalamus and uterus of 16-month-old preventive acupuncture or moxibustion groups (P < 0.05-0.01).② IL-2: IL-2 in serum of 12- and 14-month-old model groups and in the uterus of 12-, 14-, and 16-month-old model groups decreased significantly compared to the young group (P < 0.05-0.01). IL-2 serum levels increased significantly in the 16-month-old group with preventive moxibustion; in addition, IL-2 expression levels increased significantly in the uterus of the 12-month-old group with preventive moxibustion, as well as the 12- and 16-month-old groups with preventive acupuncture (P < 0.05-0.01). CONCLUSION: As a rat ages and becomes menopausal, IL-2R mRNA expression in the hypothalamus anduterus, as well as IL-2 levels in the serum and uterus, decrease. However, preventive acupuncture and preventive moxibustion can repress the decrease to some extent. This effect is even greater in the late stages of menopause (16-month-old rats). | Xiaohong Li Yuwei He Jieping Xie Lufen Zhang Dengfang Zhou Jinghui Zhai Rui Zhan Jun Zhou Limin Qu Yangchun Tian | 2008 | Neural Regeneration Research2008，3，1： | 5 |
| 4 | The Sm-Nd Geochronology of the High Pressure Basic Granulite in Laixi, Eastern Shandong显示文摘A high pressure basic granulite ultramafic rock belt, which is about 200km long and trends toward NE, occurs in the late Archaean orthogneiss in Laixi Laiyang Qixia area, eastern Shangdong. This belt is located east to the Su Lu UHPM terrane and west to the Archaean rocks of the North China craton, therefore, its geological situation and implication for collision between the North China plate and the Yangtze plate is very important. The analyzed sample of high pressure basic granulite has decreasing pressure metamorphic texture. The mineral assemblage of retrograde metamorphism is of granulite facies. The sample yields an internal mineral whole rock Sm Nd isochron age of 1725Ma. The T(DM) age of whole rock is 2788Ma. These data are very similar to those of high pressure basic granulites in Northern China craton. Considering the petrological and geochemical characteristics and isotopic ages, the high pressure granulite ultramafic rock belt in eastern Shandong is suggested to belong to the North China craton and to be of the early Precambrian lower crust. Their lifting from the lower crustal level is related to collision between the North China plate and the Yangtze plate. | Li Yonggang,Zhai Mingguo,Liu Wenjun,Guo Jinghui and Li Tiesheng (Institute of Geology, Chinese Academy of Sciences, Beijing 100029 China) | 1999 | Global Geology1999，4，1： | 4 |
| 5 | Petrologic indicators of prograde metamorphism in Paleoproterozoic garnet mafic granulites from the Huai'an complex, North China Craton显示文摘Reconstruction of pressure-temperature-time(P-T-t)paths and thermal regimes are essential for inferring tectono-metamorphic processes involved in the formation of metamorphic terranes.However,the P-T information,especially the prograde evolution is generally preserved incompletely due to the fast intra-or inter-grains diffusion under high-temperatures.It may result | Jialin Wu Mingguo Zhai Huafeng Zhang Jinghui Guo Haozheng Wang Wenqiang Yang Hong Zhang Bo Hu | 2018 | Science Bulletin2018，63，2： | 2 |
| 6 | Neoarchean to Paleoproterozoic Continental Evolution and Tectonic History of the North China Craton: A Review显示文摘 | Zhai Mingguo Guo Jinghui Liu Wenjun | 2005 | Journal of Asian Earth Sciences2005，24，： | 1 |
| 7 | Sm-Nd geochronology and petrography of garnet pyroxene granulites in the northern Sulu region of China and their geotectonic implication显示文摘 | Zhai Mingguo Cong Bolin Guo Jinghui Liu Wenjun Li Yonggang Wang Qingchen | 2000 | Lithos2000，52，14： | 1 |
| 8 | Fast identification of inactive security constraints in SCUC problems显示文摘 | Zhai Qiaozhu Guan Xiaohong Cheng Jinghui | | 0，，04： | 1 |
| 9 | Two linear granite brits in the central-western North China Craton and their implication for Late Neoarchaean Paheoproterozoic continental evolution显示文摘 | Zhai Mingguo Guo Jinghui Li Yonggang | 2003 | Precambrian Research2003，127，： | 1 |
| 10 | Paleoproterozoicgabbro noritic and granitic magmatism in the northern margin ofNorth China craton: Evidence of crust- mantle interaction显示文摘 | Peng Peng Guo Jinghui Zhai Mingguo | 2010 | Precambrian Research2010，183，2010： | 1 |
| 11 | Mesoproterozoic magmatic events in the eastern North China Craton and their tectonic implications: Geochronological evidence from detrital zircons in the Shandong Peninsula and North Korea显示文摘 | Bo Hu Mingguo Zhai Tiesheng Li Zhong Li Peng Peng Jinghui Guo Timothy M. Kusky | 2012 | Gondwana Research . 2012 (3-4)2012，，3： | 1 |
| 12 | Neoarchean to Paleoproterozoic continental evolution and tectonic history of the North China Craton: a review显示文摘 | Mingguo Zhai Jinghui Guo Wenjun Liu | 2004 | Journal of Asian Earth Sciences2004，，5： | 1 |
| 13 | Eclogite-High-Pressure Granulite Belt in Northern Edge of the Archean North China Craton显示文摘High-pressuremetamorphiceclogite,asawindowofstudyfordepthleveloflowermostcrustandmantle,hasanimportantindicatingsignificancet... | Zhai Mingguo Guo Jinghui Li Yonggang Yan Yuehua Liu Wenjun Institute of Geology, Academia Sinica, Beijing 100029 | 1998 | Journal of Earth Science1998，17，1： | 0 |
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