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| 1 | DNA cytosine methylation in plant development显示文摘Cytosine bases of the nuclear genome in higher plants are often extensively methylated.Cytosine methylation has been implicated in the silencing of both transposable elements (TEs) and endogenous genes,and loss of methylation may have severe functional consequences.The recent methylation profiling of the entire Arabidopsis genome has provided novel insights into the extent and pattern of cytosine methylation and its relationships with gene activity.In addition,the fresh studies also revealed the more dynamic nature of this epigenetic modification across plant development than previously believed.Cytosine methylation of gene promoter regions usually inhibits transcription,but methylation in coding regions (gene-body methylation) does not generally affect gene expression.Active demethylation (though probably act synergistically with passive loss of methylation) of promoters by the 5-methyl cytosine DNA glycosylase or DEMETER (DME) is required for the uni-parental expression of imprinting genes in endosperm,which is essential for seed viability.The opinion that cytosine methylation is indispensible for normal plant development has been reinforced by using single or combinations of diverse loss-of-function mutants for DNA methyltransferases,DNA glycosylases,components involved in siRNA biogenesis and chromatin remodeling factors.Patterns of cytosine methylation in plants are usually faithfully maintained across organismal generations by the concerted action of epigenetic inheritance and progressive correction of strayed patterns.However,some variant methylation patterns may escape from being corrected and hence produce novel epialleles in the affected somatic cells.This,coupled with the unique property of plants to produce germline cells late during development,may enable the newly acquired epialleles to be inherited to future generations,which if visible to selection may contribute to adaptation and evolution. | Meishan Zhang Josphert N.Kimatu Kezhang Xu Bao Liu | 2010 | Journal of Genetics and Genomics2010，37，1： | 26 |
| 2 | Types, Metallogenic Environments and Characteristics of Temporal and Spatial Distribution of Copper Deposits in China显示文摘Based upon a comprehensive study of 123 copper deposits in China. this paper reaches the following conclusions: 1. The crust in China was solidified pretty late; with the accretion of the plate, the copper mineralization moved towards its margin in space and became successively younger in age. 2. The major copper ore types ever found in the world have mostly been discovered in China, in which the porphyry type seems to be the most important and the massive sulfide type in the transitional bed between marine clastic and carbonate rocks is clearly defined. 3. Carbonate strata are widespread in China and their deposition lasted for a long geological period, so the proportion of copper deposits occurring in them is large as compared with other parts of the world. 4. Seven metallogenic epochs can be recognized, in which the Mesozoic one plays the leading role and the middle(late) Palaeozoic and Cenozoic ones are next in importance. Mineralization was comparatively simple in the early geological period. and became diversified later on. In the early epochs copper deposits related to basaltic magmatism and metamorphosed marine sediments predominated, whereas in the later epochs those related to granitic magmatism and continental sedimentation were dominant. 5. There exist in China thirteen metallogenic provinces, of which the Lower Yangtze downwarping belt, Sanjiang fold system, Jiangnan axis and Xikang-Yunnan axis are of greater significance. 6. The crustal mobility in China was rather pronounced, the polycyclic evolution of the crust has resulted in such obvious phenomena as the inheritance of mineralization, the coexistence of various types and the superposition of different genetic types. | Wang Zhitian and Qin Kezhang Beijing Institute of Geology for Mineral Resources, CNNC, Beijing Zhang Zhongmin | 1989 | Acta Geologica Sinica(English Edition)1989，63，1： | 5 |
| 3 | Massive Sulphide Deposits Related to the Volcano-Passive Continental Margin in the Altay Region显示文摘The Devonian volcano-passive continental margin in southern Altay is a significant volcanogenic massive sulphide metallogenic belt. Acidic volcanism has been dominant on the inner side of the volcano-passive continental margin, i.e., near the old land, resulting in a Pb-Zn metallogenic sub-belt, in which the ore deposits are hosted by sedimentary rocks in volcanic series, as represented by the large Koktal Pb-Zn deposits. In the central part of the margin far away from the old land, bimodal volcanic formations are well developed, forming volcanics-hosted Cu-Zn metallogenic sub-belts, e.g., the large-scale Ashele Cu-Zn deposit. The Qiaoxiahala sub-belt on the outer side of the margin near the ocean ridge is located at the spreading central trough, where ophiolite suites are developed. This type of deposits is rich in gold and copper, similar to the Cyprus-type Fe-Cu-Au metallogenic sub-belt in metallogenic environment (represented by the Qiaoxiahala medium-scale Fe-Cu-Au deposit). From the old land to | WANG Jingbin DENG Jiniu ZHANG Jinhong QIN Kezhang | 1999 | Acta Geologica Sinica(English Edition)1999，73，3： | 3 |
| 4 | Rare Earth Element Behaviour in theWunugetushan Copper - Molybdenum Deposit,Inner Mongolia, and Its Implications显示文摘Considering porphyry and wall rocks as a whole system, the behaviour of rare earth elements (REE) in hydrothermal alteration and mineralization of the exceedingly large Wunugetushan porphyry Cu-Mo deposit of Inner Mongolia has been studied. It has been found for the first time that there exists complementary REE variation in hydrothermal alteration between porphyry and wall rocks, and Eu depletion has certain significance in indicating mineralization. Based on an analysis of the variation in REE contents of relevant minerals during the hydrothermal alteration, the ore-forming fluids are inferred to be depleted in ∑REE, comparatively enriched in ∑Y and strongly depleted in Eu. In the intermediate-strong alteration zones, porphyry and wall rock took part in hydrothermal metasomatism and alteration almost in equal ratio mass. Furthermore, studies of REE and hydrogen and oxygen isotopes and fluid inclusions confirm the existence of hydrothermal convection and the possibility of supplying part of ore | Qin Kezhang and Wang ZhitianBeijing Institute of Geology for M ineral Resources, CNNC, Beijing | 1994 | Acta Geologica Sinica(English Edition)1994，68，2： | 3 |
| 5 | Zircon dating, Hf–Sr–Nd–Os isotopes and PGE geochemistry of the Tianyu sulfide-bearing mafic–ultramafic intrusion in the Central Asian Orogenic Belt, NW China显示文摘 | Dongmei Tang Kezhang Qin Chusi Li Liang Qi Benxun Su Wenjun Qu | 2011 | LITHOS2011，，1： | 1 |
| 6 | High- temperature magmatic fluid exsolved from magma at the Duolong porphyry copper-gold deposit, Northem Tibet显示文摘 | Li Jinxiang Li Guangming Qin Kezhang | 2011 | Geofluids2011，11，1： | 1 |
| 7 | Mineralogy and mineral chemistry of the Cretaceous Duolong gold-rich porphyry copper deposit in the Bangongco arc, northern Tibet显示文摘 | Li Jinxiang Li Guangming Qin Kezhang | 2012 | Resource Geology2012，62，1： | 1 |
| 8 | Paleozoic accretionary and collisional tectonics of the eastern Tianshan (China):Implications for the continental growth of central Asia显示文摘 | Xiao Wenjiao Zhang Lianchang Qin Kezhang | 2004 | American Journal of Science2004，304，： | 1 |
| 9 | U- Pb Ages and Hf - O Isotopes of Zircons from Late Paleozoic Mafic-Ultramafic Units in the Southern Central Asian Orogenic Belt: Tectonic Implications and Evidence for an Early Permian Mantle Plume显示文摘 | Su Benxun Qin Kezhang Sakyi P A | 2011 | Gondwana Research2011，20，： | 1 |
| 10 | Highly oxidized magma and fluid evolution of Miocene Qulong giant porphyry Cu-Mo deposit, Southern Tibet, China显示文摘 | Xiao Bo Qin Kezhang Li Guangming | 2012 | Resource Geology2012，62，1： | 1 |
| 11 | Geochronologic-Petrochemical Studies of the Hongshishan Mafic-Ultramafic Intrusion, Beishan Area, Xinjiang ( NW China):Petrogenesis and Tectonic Implications 显示文摘 | Su Benxun Qin Kezhang Sakyi P A | 2012 | International Geology Review2012，54，3： | 1 |
| 12 | Types, geological features and geodynamic significance of gold-copper deposits in the Kanggurtag metallogenic belt, eastern Tianshan, NW China显示文摘 | Zhang Lianchang Xiao WenJiao Qin Kezhang | 2004 | International Journal of Earth Science2004，93，： | 1 |
| 13 | The role of crustal contamination in the formation of Ni-Cu sulfide deposits in Eastern Tianshan, Xinjiang, Northwest China:Evidence from trace element geochemistry, Re-Os, Sr-Nd, zircon Hf-O, and sulfur isotopes显示文摘 | Tang Dongmei Qin Kezhang Sun He | 2012 | Journal of Asian Earth Sciences2012，，： | 1 |
| 14 | Formation of the giant Chalukou porphy Mo deposit in northern Great Xing' an Range, NE China: Partial melting of juvenile lower crust in intraplate extension environment显示文摘 | Li Zhenzhen Qin Kezhang Li Guangming | 2014 | Lithos2014，，： | 1 |
| 15 | Re verse deduction of virtual chromosomes of manufactured products for their gene-engineering-based innovative de- sign显示文摘 | CHEN Kezhang FENG Xinan CHEN Xiaochuan | 2005 | Computer-Aided Design2005，37，11： | 1 |
| 16 | Re–Os isotopic dating of molybdenite and pyrite in the Baishan Mo–Re deposit, eastern Tianshan, NW China, and its geological significance显示文摘 | Lianchang Zhang Wenjiao Xiao Kezhang Qin Wenjun Qu Andao Du | 2005 | Mineralium Deposita2005，，8： | 1 |
| 17 | Paleozoic epithermal Au and porphyry Cu deposits in North Xinjiang, China:Epochs, features, tectonic linkage and exploration significance显示文摘 | QIN Kezhang SUN Shu LI Jiliang | 2002 | Resource Geology2002，52，4： | 1 |
| 18 | Re-Os isotopic dating of molybdenite and pyrite in the Baishan Mo-Re deposit,east- ern Tianshan, NW China, and its geological significance显示文摘 | Zhang Lianchang Xiao Wenjiao Qin Kezhang | 2005 | Mineralium Deposita2005，39，： | 1 |
| 19 | U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic ultramafic units in the southern Central Asian Orogenic Belt:Tectonic implications and evidence for an Early-Permian mantle plume显示文摘 | Su Benxun Qin Kezhang Sakyi P A Li Xianhua Yang Yueheng Sun He Tang Dongmei Liu Pingping Xiao Qinghua Malaviarachchi S P K | | 0，，： | 1 |
| 20 | Intelligent Dimensioning for Mechanical Parts Based on Feature Extraction 显示文摘 | Chen Kezhang | 2001 | Computer Aided Design2001，33，13： | 1 |
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