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Tectonic Framework and Evolution of the Dabie Mountains in anhui, Eastern China

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Acta Geologica Sinica(English Edition) 1992年第3期66卷 221-238,326页

作者： Xu Shutong Jiang Laili Liu Yican Zhang Yong institute of geological sciences of {3. Province, hefei, {3. Sun Sheping institute of geological sciences of {3. Province Hefei Anhui

The Dabie Mountains are believed to be a collisional orogenic belt between the Yangtze amd Sino-Koreancontinental plates. It is composed of the foreland fold-thrust zone, the subducting cover and basement of theYangtze continental plate, the coesite- and diamond-bearing ultra-high pressure metamorphic zone and themeta-ophiolitic melange zone in the subducting basement, the fore-arc flysch nappe and the back thrust zoneoccurring respectively on the southern and northern margins of the Sino-Korean continental plate and the in-herited basin with molassic deposits on the northern margin. When the palaeo-Dabie oceanic plate subductednorthward in the Early Palaeozoic, volcanic arc and back arc basin probably formed on the southern margin ofthe Sino-Korean continental plate. The Sm / Nd isotopic dating of the strata and eclogite which were drawn in-to the foreland fold-thrust zone indicates that the intense collision of the two continental plates took place inthe Early Mesozoic.

关键词： collisional orogenic belt ultra-high pressure metamorphic zone ophiolitic melange zone coesite diamond

Discovery of low grade metamorphic volcanic rock sheets within UHP in Dabie Mts. and its implications

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Chinese Science Bulletin 1997年第14期42卷 1199-1203页

作者： DONG Shuwen, WANG Xiaofeng and HUANG Dezhi1. Chinese Academy of geological sciences (CAGS), Beijing 10003., China 2. institute of Geomechanics of CAGS, Beijing 100081 China {3., hefei 23.001 Chinese Academy of geological sciences (CAGS) Beijing 100037 China

THE ultrahigh-pressure metamorphic zone (UHP), outcropping in the central and southernDabie Mts. with an area of about 1000 km^2, may be the largest one in the world. The forma-tion and exhumation mechanism of the UHP rocks become a hot point in the study of continen-tal orogen. The first finding of the Shiqiao structural window, which is composed of low

关键词： ultrahigh-pressure metamorphic zone (UHP) low grade metamorphic rock sheets Dabie Mts.

A Preliminary Research on Skarns of Magmatic Origin

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Journal of Earth Science 1999年第1期18卷 58-61页

作者： Wu Yanchang anhui institute of geological {3., hefei 23.001

Skarns of magmatic origin, or magmatic skarns as called, are formed by crystallization of skarnic magma injecting into structural fissures. They occur in various rocks (rock formations), mainly in form of veins. Usually, they possess massive structure and cumulative texture. They mainly consist of calc silicate, without or with minor water bearing silicates. The typical minerals in it include alkali feldspar, calcite and anhydrite. Some silicate melt inclusions and high temperature, high salinity poly phase inclusions can be seen in the crystals of their host minerals. The particular members of the magmatic skarns are transitional skarn and skarnic pegmatite. The magmatic skarn and the congenetic alkali rich diorite usually collaborate in a conjugating and complementary manner. They probably are the products of calcic contamination, degassing, desilicification and separation in melt state of deep seated (high level magma chamber) alkali rich intermediate acid magma.

关键词： magmatic skarn magmatic skarn alkali intrusive pair the middle and lower reaches of Changjiang River.

^(40)Ar/^(3.)Ar dating of shear deformation of the Xianshuihe fault zone in west Sichuan and its tectonic significance

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Science China Earth sciences 2004年第9期47卷 794-803页

作者： ZHANG Yueqiao1, CHEN Wen2, 3.& YANG Nong1 1. institute of Geomechanics, Chinese Academy of geological sciences, Beijing 100081, China 2. institute of Geology, Chinese Academy of geological sciences, Beijing 10003., China 3. institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, China institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

Based on field geological survey, structural measurements and classical Ar/Ar dating of mica, biotite and K-feldspar, we obtain cooling ages for Miocene left-lateral shear along the Xianshuihe fault zone. The results document two thermal events during the sinistral shear. The early event (12-10 Ma) corresponds to rapid cooling of the Zheduoshan granitic massif from above 700℃ to below 3.0℃. The late event (5-3.5 Ma) corresponds to cooling of granites intruded along the eastern side of the fault zone. These dating results provide important thermochronological constraint on the timing of late Cenozoic eastward extrusion of the Chuan-Dian Block in the SE Tibetan margin.

关键词： Xianshuihe fault zone, Zheduoshan granitic massif, sinistral shear deformation, 40Ar/3.Ar dating, late Cenozoic.

Using Fractal Function Auto-correlative Method to Confirm Fractal Dimension of Function Graph

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Chinese Journal of Lasers 1999年第2期8卷 54-57页

作者： FAN Chengyu (anhui institute of Optics and Fine Mechanics, The Chinese Academy of sciences, {3. 23.03., China) 中科院安徽光学精密机械所安徽合肥 230031

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｈｙｐｏｔｈｅｓｉｓｏｆａｓｔａｔｉｓｔｉｃａｌｙｌｏｃａｌｙｉｓｏｔｒｏｐｉｃｈｏｍｏｇｅｎｅｏｕｓｔｕｒｂｕｌｅｎｔｆｉｅｌｄｗａｓｔｈｅｂａｓｅｏｆＫｏｌｍｏｇｏｒｏｖ’ｓｍｏｄ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｈｙｐｏｔｈｅｓｉｓｏｆａｓｔａｔｉｓｔｉｃａｌｙｌｏｃａｌｙｉｓｏｔｒｏｐｉｃｈｏｍｏｇｅｎｅｏｕｓｔｕｒｂｕｌｅｎｔｆｉｅｌｄｗａｓｔｈｅｂａｓｅｏｆＫｏｌｍｏｇｏｒｏｖ’ｓｍｏｄｅｌ［１］．Ｔｈｅｓｅｃｏｎｄｏ...

关键词： function graph fractal dimension power spectrum

The effects of K^+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6

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Science China(Life sciences) 2006年第2期49卷 123-129页

作者： WANG Hailei1,2,3. KONG Fanjing1,2,3.& ZHENG Mianping1,2,3.1. R&D Center for Saline Lake and Epithermal Deposits, Chinese Academy of geological sciences, Beijing 10003., China 2. Key Open Laboratory of Saline Lake Resources and Environment, Chinese Academy of geological sciences, Beijing 10003., China 3. institute of Mineral Resources, Chinese Academy of geological sciences, Beijing 10003., China R&D Center for Saline Lake Epithermal Deposits Chinese Academy of Geological Sciences Beijing 100037 China Key Open Laboratory of Saline Lake Resources Environment Chinese Academy of Geological Sciences Beijing 100037 China institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

The accumulation of cesium by the bacterium Thermus sp. TibetanG6 was examined under different K+ growth conditions. The effects of external pH and Na+ on the accumulation of ce-sium were also studied, and the mechanism involved was discussed. K+ regimes played an important role in the accumulation of cesium by the strain TibetanG6. The quantity of cesium accumulated (24 h) was much higher in K+-deficient regime than that in K+-sufficient regime. The pH and Na+ had different effects on the accumulation of cesium in the two K+ regimes. IR spectra analyses indicated that the biosorption is a process of homeostasis with cesium initially accumulated on the cell wall.

关键词： Thermus sp. TibetanG6, cesium, bioaccumulation, K+-growth condition, pH, sodium, IR spectroscopy.

Repetition Operation of Flashlamp Pumped Ti: sapphire Laser

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Chinese Journal of Lasers 1996年第6期B5卷 492-496页

作者： LI Ziyao GAO Guochang YIN Shaotang (anhui institute of Optics and Fine Mechanics,Chinese Academy of sciences, {3. 23.03., China) anhui Inst of Optics and Fine Mechanics Hefei China

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ＲｅｐｅｔｉｔｉｏｎＯｐｅｒａｔｉｏｎｏｆＦｌａｓｈｌａｍｐＰｕｍｐｅｄＴｉ：ｓａｐｐｈｉｒｅＬａｓｅｒ￥ＬＩＺｉｙａｏ；ＧＡＯＧｕｏｃｈａｎｇ；ＹＩＮＳｈａｏｔａｎｇ（ＡｎｈｕｉＩｎｓｔｉｔｕｔｅｏｆＯｐｔｉｃｓａｎｄＦｉｎｅＭｅｃｈａｎｉｃｓ，Ｃ...

关键词： Ti:sapphire laser flashlamp pumped repetition operation

Crustal structure of Gondwana-and Yangtze-typed blocks:An example by wide-angle seismic profile from Menglian to Malong in western Yunnan

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Science China Earth sciences 2005年第11期48卷 1828-1836页

作者： ZHANG Zhongjie1, BAI Zhiming1, WANG Chunyong2, TENG Jiwen1, Lü Qingtian3. LI Jiliang1, SUN Shanxue1 & WANG Xinzheng1 1. institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, China 2. institute of Geophysics, Chinese Seismological Bureau, Beijing 100081, China 3. institute of Deposition Resource, Chinese Academy of geological sciences, Beijing 10003., China 1. institute of Geology and Geophysics Chinese Academy of Sciences 100029 Beijing China 2. institute of Geophysics Chinese Seismological Bureau 100081 Beijing China 3. institute of Deposition Resource Chinese Academy of Geological Sciences 100037 Beijing China

The wide-angle seismic profile between Menglian and Malong crosses the Baoshan block (Gondwana-typed), and Simao and southwestern Yangtze blocks (Yangtze-typed). By in-terpreting the wide-angle seismic data, we obtained the seismic crust/upper mantle structure of P-wave velocities together with the seismic reflections of these three blocks, Changning- Menglian and Mojiang suture zones among the mentioned three blocks. Our interpreting results demonstrate that the P-wave crustal velocity of Simao block is slower than that of Baoshan and southwestern Yangtze block and the crustal thickness gradually thickens from the Baoshan block, Simao to southwestern Yangtze block. Crustal reflection patterns of these three blocks have dis-tinct differences too. For the Gondwana-typed blocks, seismic reflections in the upper crust are well developed while in middle-lower crust they are very weak. The crustal reflections in the Yangtze block are very well developed. The crustal reflection patterns in Simao and southwest-ern Yangtze blocks are distinguishable. The average thickness of the crust in the studied area is about 40 km. And we make some discussions on the crustal thickening model of the three blocks in western Yunnan and tectonic setting of seismic developing and interaction of Gondwana and Yangtze blocks.

关键词： Gondwana blocks,Yangtze blocks,wide-angle profile,crustal structure,tectonic setting

Grain-size features of a Miocene loess-soil sequence at Qinan: Implications on its origin

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Science China Earth sciences 2006年第7期49卷 731-738页

作者： QIAO Yansong1,3. GUO Zhengtang2,1, HAO Qingzhen1, YIN Qiuzhen1, YUAN Baoyin1 & LIU Tungsheng1 1. institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, China 2. institute of Earth Environment, Chinese Academy of sciences, Xi’an 710075, China 3. institute of Geomechanics, Chinese Academy of geological sciences, Beijing 100081, China 1. institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China 3. institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China 2. institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China

In this study, grain-size of 507 bulk samples from the QA-I Mioceneloess-soil sequence at Qinan were analyzed, and the grain-size features are compared with those oftypical Quaternary loess and soil samples, representative lacustrine and fluvial samples. Theresults indicate that the grain-size distribution pattern of the Miocene loess is essentiallysimilar to that of Quaternary loess, but greatly differs from the lacustrine and fluvial *** layers are regularly coarser than soil layers, indicating cyclical climate changes. Mediangrain-size along the 253.1 m sequence varies from 6 to 13.μm and the > 63.μm fraction representsonly 5.3. in maximum, 0.9% in average. Long-term grain-size variations are consistent with the loessaccumulation rate at Qinan and with the eolian mass accumulation rate in the North Pacific. Thesefeatures firmly indicate an eolian origin of the studied sequence, and also reveal a coeval changesbetween the long-term changes of eolian grain-size and continental aridity in the dust sourceregions.

关键词： Qinan, Miocene loess-soil sequence, grain-size, eolian origin.