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Primary Study on Quantitative Reconstruction of Middle-Late Eocene Climate in Jianghan Basin

Journal of China University of Geosciences 2002年第3期13卷 252-259页

作者： Tong Guobang Liu Zhiming institute of Hydrogeology and Environmental geology, {3. Academy of geological sciences, Zhengding 050803.Open Laboratory of Saline Lake Resources and Environment, {3. Academy of geological sciences, beijing 10003. Zheng Mianping institute of Mineral Resources, {3. Academy of geological sciences, beijing 10003. Research & Development center of Saline Lake and Epithermal Deposit, {3. Academy of geological sciences, beijing 10003. Wang Weiming Nanjing institute of geology and Palaeontology, {3. Academy of sciences, Nanjing 210008 institute of Hydrogeology and Environmental geology Chinese Academy of Geological Sciences Zhengding 050803 Open Laboratory of Saline Lake Resources and Environment Chinese Academy of Geological Sciences Beijing 100037 institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 Research & Development center of Saline Lake and Epithermal Deposit Chinese Academy of Geological Sciences Beijing 100037 Nanjing institute of geology and Palaeontology Chinese Academy of Sciences Nanjing 210008

This paper reports our primary effort in the quantitative reconstruction ofpaleoclimate based on the thrine in phytoecology of the affinity parent plants in the stratigraphicpollen records. The Eocene pollen data come from our former study on the Mingjia borehole 1 in theJianghan basin. The fluctuating trend in the parameter curve of climate shows that the climate inthe Middle Eocene in the Jianghan basin was more or less comparable with that of the present2.°―2.°N, characteristic of a humid, semi-humid central-southern subtropical climate. The annualtemperature at that time dropped by 1 ℃― 4 ℃ in the Late Eocene, approximately equal to that ofthe present 2.°―2.°N of northern-central subtropical climate. However, the climate composite atthat time, characterized by higher temperature, small annual range and big fluctuation inprecipitation, was quite different from the present one. The average temperature in January in theMiddle Eocene, higher than that of today, ranged between 5 ℃ and 9 ℃, indicating that no effect ofwinter monsoon occurred in the Middle Eocene, though such an effect may have occurred occasionallyin the Late Eocene. Major temperature decline is recognized at the depth of 2.100 m in the borehole,as was indicated by the decline in average January temperature, the increase in annual range, andthe increase in the deciduous broad-leaved types of trees in the spore-pollen assemblage. The sharpfluctuation in the annual precipitation, usually raging from 3.0 to 1 700 mm, was favorable for themigration and accumulation of salty deposit. When the precipitation was lower than 1 000 mm,ephemera shrub increased at the same depth as that of the salty deposit. It is, therefore, deducedthat the formation of the salty deposit was attributed mainly to the dry and hot environment in thehigh mountains and deep basins. The small annual precipitation and the intense fluctuation arefavorable for the sustainable accumulation of the salts, which is different from the present

关键词： quantitative reconstruction of paleoclimate annual range function ofthrine in phytoecology fuzzy mathematics eocene jianghan basin

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Himalayan Tectonic Evolution in the East Asian Peri-Pacific Region

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Acta Geologica Sinica(English Edition) 1990年第3期64卷 233-246页

作者： Cui Shengqin Li Jinrong institute of Geomechanics, chinese Academy of {2. Scinences, {3. Fei Zhenbi institute of Geornechanics Chinese Academy of Geological Scinences Beijing

This paper summarizes the Late Palaeozoic. Indosinian and Yanshanian palaeotectonic settings in theperi-Pacific region of East Asia. On that basis, the Himalayan crustal movement in the region is divided intothe early and late tectonic stages and two principal tectonic phases. From the ocean to the continent, 5 giganticHimalayan formation-deformation belts are distinguished; they are the Northwest Pacific trench-island arcbelt. the Northwest Pacific marginal sea basin bell. the East China Sea-northern South China Seacontinental-shelf down-faulted belt. the East Asian epicontinental rift belt. and the East Asian intracontinentalrift belt. The Early and Late Himalayan tectonic evolution is dealt with. Finally the state of the Himalayan re-gional stress field and its evoution in the region are discussed. It is considered that the mechanism of their for-mation is closely related to the continent-ocean and surface-deep earth interaction.

关键词： Asia

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Spatial-temporal Frame,Evolution and Mineralization of the Northern Qilian Metallogenic Province

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Acta Geologica Sinica(English Edition) 1997年第2期71卷 204-216页

作者： Sun Haitian Wu Jieren and Li Jinping institute of Mineral Deposits, chinese Academy of {2. {3., beijing Xi’an institute of geology and Mineral Resources, chinese Academy of {2. {3., Xi’an, Shaanxi institute of Mineral Deposits, chinese Academy of {2. {3., beijing institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing Xi'an institute of geology and Mineral Resources Chinese Academy of Geological Sciences Xi'an Shaanxi institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing [?]Sun Haitian Born in 1955 got a doctorate degree in 1988 conducted postdoctoral research from 1989 to 1991 in the Department of geology and Mineral Resource Engineering Norwegian University of Science and Technology. He is now Research Professor at the Institute of Mineral Deposits Chinese Academy of Geological Sciences and has long been engaged in geology metallogenesis and regional metallogeny of metallic ore deposits with emphases on cooper deposits and volcanic and sedex metallic deposits.

Four metallogenic epochs occurred in different tectonic environments during theevolution of the Northern Qilian metallogenic province through the geological time. The Mid-dle Proterozoic metallogenic epoch witnessed the tectonic environment of crustal breakupcaused by mantle diapirism, in which ultramafic-mafic rocks were intruded along beep faultbelts and the superlarge Jinchuan magmatic Cu-Ni sulphide deposit was formed. In theMiddle-Late Proterozoic metallogenic epoch the crust was further broken to form anintracontinental rift, in which the Chenjiamiao style massive Cu-Fe sulphide deposits hosted bybasic volcanic tuff were formed in the lower volcano-sedimentary sequence, while the largesedex type Jingtieshan style Fe-Cu deposits were formed within the upper abyssal carbon-richargillaceous sedimentary sequence. The Early Palaeozoic saw the aulacogen environment, with-in which the Baiyinchang style superlarge massive base and precious metal sulphide depositshosted by quartz keratophyric tuff were formed in the Middle-Late Cambrian rifted island arcand the massive Cu-Zn sulphide deposits and magmatic chromite deposits associated with theophiolite suite were formed in the Early-Middle Ordovician, and the Honggou style massiveCu-Fe sulphide deposits hosted by spilite were formed in the Late Ordovician back-arc basinenvironment. In the Late Palaeozoic-Meso-Cenozoic, the metallogenic province went into anintracontinental orogenic stage characterized by compressive tectonic environment, in whichthere occurred carbonate-quartz vein type and tectono-alteration gold deposits associated withductile-shear structures.

关键词： northern Qilian metallogenic province evolution and mineralization

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Zircon shrimp U-Pb dating for gabbro at Chaotiehe in the Haicheng area,eastern Liaoning

Zircon SHRIMP U-Pb dating for gabbro at Chaotiehe in the Hai...

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中国科学院地质与地球物理研究所第十届(2.10年度)学术年会

作者： MIAO LaiCheng~(1*),ZHANG FuQin~1,LIU DunYi~2.SHI YuRuo~2.& XIE HangQiang~2.1 {3. and Geophysics,chinese Academy of {2.,{3. 10002.,China 2.beijing shrimp Centre,{3.,chinese Academy of geological {2.,beijing 10003.7,China

Chaotiehe gabbroic intrusion in the eastern part of Liaoning Province was dated by the zircon shrimp U-Pb *** results gave an emplacement age of 12.±4 Ma,indicating that the intrusion thus formed during the lithospheric thinning of the North China Craton(NCC) in the Early Cretaceous rather than in a rifting setting during the Paleoproterozoic as previously *** gabbroic intrusion contains abundant old zircons with Paleoproterozoic(2.10-2.46 Ga and ca.1.87 Ga) and Neoproterozoic (747-969 Ma) *** Paleoproterozoic zircons were probably derived from NCC itself,whereas the Neoproterozoic ones were likely from materials of the Yangtze Craton that had previously been subducted beneath *** geochrono logical dates are of important implications for understanding the Mesozoic crustal evolution of NCC.

关键词： Gabbro zircon shrimp age eastern Liaoning Province North China Craton

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Transport network and flow mechanism of shallow ore-bearing magma in Tongling ore cluster area

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Science China Earth sciences 2006年第4期49卷 397-407页

作者： DENG Jun1,2. WANG Qingfei1,2., HUANG Dinghua3., WAN Li4, YANG Liqiang1,2.& GAO Bangfei1,2.1. State Key Laboratory of geological Processes and Mineral Resources, China University of Geosciences, {2. 100083. China 2. Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, China University of Geo- sciences, {2. 100083. China 3. Faculty of Earth sciences, China University of Geosciences, Wuhan 43.074, China 4. School of Mathematics and Information Science, Guangzhou University, Guangzhou 510405, China 1. State Key Laboratory of geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China 2. Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing 100083 China 3. Faculty of Earth sciences China University of Geosciences Wuhan 430074 China 4. School of Mathematics and Information Science Guangzhou University Guangzhou 510405 China

Abundant studies revealed that shallow intrusions of the Yanshanian epoch resulted in the mass mineralization of the Tongling region. Various evidences showed there existed a concealed magma chamber at ?10 km depth in the middle part of this region during Yanshanian epoch, from which the ore-forming magma was generated and then transported to the superficial layer. Yet the transport network and flow mechanism of the shallow ore-bearing magma, the key problem associ- ated with ore-forming process, was relatively little focused on. Integrate analysis of structural me- chanics, statistical fractal and geological facts suggested that NE trending high-angle fold-related thrust faults and the tessellated basement ones served as the main pathways for the shallow magma’s transporting, moreover, the saddle void spaces among adjacent strata in the folds upon this fault system provided the place for magma’s emplacement. So the folds in the upper part and faults in the lower part of the upper crust constituted the fluid’s transport and emplacement network. During the deformation of geologic body with multi-layer structure, the layers in the upper part tended to fold when received the jacking stress from the lower part, while the lower one inclined to fault undergoing loads of the upper part. And the producing probability of this structure assemblage was highly in- creased in the condition, such as in the Tongling area, that the mechanic rigidity of the lower layers was stronger than that of the upper ones. For the pre-existence of fluid-conducting network, the top magma with high volatile in the magma chamber transported rapidly to the superficial layer in dyking pattern, located in the void spaces of folds, filled and reconstructed them. The sudden drop of pres- sure caused the fluid unmixing from the magma and mass ore-forming elements concentration. Pulse activity of the dyking may be the principal reason why magmatic bodies in the Tongling area were spatially-temporally con

关键词： Tongling, structural network, magma intrusion, fractal, dyke.

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Quantitative assessment of the complexity of geological structures in terms of seismic propagators

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Science China Earth sciences 2010年第1期53卷 54-63页

作者： FU LiYun Key Laboratory of the Earth’s Deep Interior,institute of geology and Geophysics,chinese Academy of {2.,{3. 10002.,China 1. Key Laboratory of the Earth’s Deep Interior Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China

How a wave interacts with heterogeneous media has been pursued by many *** complexity of subsurface heterogeneities is seismologically a relative concept to wavelengths of seismic waves.A growing perception is that velocity variations,propagation angles,and computational accuracies are closely related at a variety of scales.A tentative strategy to quantitatively evaluate the complexity of subsurface heterogeneous media is presented in this article to see what scales of geological heterogeneities to be captured by *** express complex subsurface structures as the slowness-and angularheterogeneity spectra to quantify velocity contrasts and dipping-angle distributions of complex geological *** the other hand,the scaling characteristics of a propagator are measured through dispersion analysis by its angular spectra plotted against refractive indexes and propagation angles,respectively.A parameter termed as imaging efficiency is introduced by associating the geological heterogeneity spectra with the propagator's angular spectra to understand the coherent interference between the medium's heterogeneity and the propagator's scaling ***,a complexity coefficient can be defined to evaluate geological complexities in terms of *** application of this strategy is demonstrated to the SEG/EAEG salt model.

关键词： geological heterogeneity spectra seismic imaging propagator’s angular spectra imaging efficiency complexity coefficient

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A New Scheme for Calculating Mineral End-Members With Reference to Clinopyroxene And Garnet

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Acta Geologica Sinica(English Edition) 1992年第2期66卷 191-196页

作者： Yang Jianjun Yang Jianjun Lithospheric Research Centre. chinese Academy of geological {2., {3. Jiang Minxi Lithospheric Research Centre Chinese Academy of Geological Sciences Beijing

In order to eliminate the defect of successively separative calculations of different end-members of a min-eral and to establish a widely applicable new scheme for calculating mineral end-members, the use of the linearprogramming technique is proposed to calculate simultaneously all end-members in this paper. All calculationswith the scheme under study can result in non-negative values. In the case of calculating end-members ofclinopyroxene, the Eskola's molecule is introduced so as to reach stoichiometry. When certain minor elementsin solid solutions are present in a remarkable amount, by adding to the equations the vectors of the corre-sponding end-members and adjusting the component vectors it is possible to obtain calculation results, in-cluding those of such end-mempbers. The possibility of using the calculation scheme under study to estimate theFe^(3.)/Fe^(2.) ratio of a mineral from electron microprobe analysis is also discussed in this paper.

关键词： CRYSTAL-CHEMISTRY

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Experimental remolding on the caprock's 3. strain field of the Indosinian-Yanshanian epoch in Tongling deposit concentrating area

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Science China Earth sciences 2005年第7期48卷 863-874页

作者： DENG Jun1,HUANG Dinghua2.WANG Qingfei1,WAN Li1,SUN Zhongshi3.YANG Liqiang1 & GAO Bangfei1 1. State Key Laboratory of geological Processes and Mineral Resources,China University of Geosciences,{2. 100083.China 2. Faculty of Earth sciences,China University of Geosciences,Wuhan 43.074,China 3. Department of Earth sciences,Jilin University,Changchun 13.061,China State Key Laboratory of geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China Faculty of Earth sciences China University of Geosciences Wuhan 430074 China Department of Earth sciences Jilin University Changchun 130061 China

Based on field observations and rheology analysis, we perform one analogue experiment and remold the 3. structural frame of Tongling deposit concentrating area firstly. Then we disassemble and dialyze the 3. structures of the model using the methods of "slicing" and "stripping". A series of sliced planes vertical to the fold hinges show similar landscapes of that in the drill hole profiles. Meanwhile, layer stripping analysis indicates that the deformation features of each layer in the model are qualitatively analogical to those obtained from field observations. Through contrasting the 3. structure between the experimental model and the field phenomena, we verify the following 3. deformation features of the caprock in this area: (1) the Tongling area mainly consists of three series of NE S-typed fold groups; (2. in the uniform stress field, the incoherent folds universally develop in different positions, along different axes as well as in different strata; (3. the faults propagate upward which are mostly inter-bedded detachment faults, while the fold amplitudes decrease while going deeper; and (4) the folds and cleavages are highly developed in the Silurian System indicating that the deformation effect of the Indosin-ian-Yanshanian structural layer terminates at this layer, which suggests that the Silurian System is the crucial layer for the inversion between brittle and plastic deformation domains and the underlying strata are subject to the control of another deformation system with distinct properties.

关键词： Tongling deposit concentrating area Indosinian-Yanshanian epoch 3. structural frame of the caprock analogue experiment slicing and stripping analysis structural model.

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Evidence of the Pan-Lake Stage in the Period of 40-2. ka B.P. on the Qinghai-Tibet Plateau

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 266-272页

作者： ZHENG Mianping, MENG Yifeng and Wei LejunResearch & Development center of Saline Lake and Epithermal Deposits,chinese Academy of {2. {3., beijing 10003. Research & Development center of Saline Lake and Epithermal Deposits Chinese Academy of Geological Sciences Beijing 100037 [?]2.heng Mianping Born in Fujian in 193. graduated from the Department of geology Nanjing University in 1956. He was studied the geology of saline deposits for more than 40 years and made systematic and pioneering studies on saline lakes of the Qinghai-Tibet plateau. Now he is chief of the Research & Development Center of Saline Lakes and Epithermal Deposits Chinese Academy of Geological Sciences and an academician of the Chinese Academy of Engineering as well as a member of the Executive Committee of the International Society of Saline Lakes. E-mail: zmp@***

The Qinghai-Tibet plateau is one of major saline lake regions in China, where saline lakes are widespread and constitute an important object of researches on the palaeoclimatic change in the region. On the basis of comprehensive investigations of the evolution of the lake's surface and sediments on the plateau, the authors have further demonstrated the existence of a pan-lake stage (river and lake flooding stage) on the Qinghai-Tibet plateau during the period of about 40+-2. ka B.P. and analyzed the palaeoclimatic characteristics of the pan-lake period and relationships between the ancient monsoons and the uplift of the plateau since the beginning of the Quaternary.

关键词： Qinghai-Tibet plateau Late Pleistocene pan-lake event palaeoclimate

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DEEP SEISMIC SOUNDING EVIDENCE FOR TECTONIC INTERACTION BETWEEN TARIM AND WEST KUNLUN MT

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地学前缘 2000年第S1期7卷 221-222页

作者： Li Qiusheng 1,Lu Deyuan 1,Gao Rui 1,Li Jingwei 2.Fan Jingyi 2.Zhang Zhiying 2.Liu wen 2.(1 Lithosphere Research center, chinese Academy of {2. {3., beijing 10003.,China 2.562.institute, chinese Academy of {2. {3., Hebei

The Tarim basin, located in the northern margin of Tibet, plays a key role in comprehending Tibetan plateau rapid uplift process. Focuses have been on the contribution of basin block to create high mountain (e.g.,Chen and Molnar,1977, Molnar et al.,1993. Ph. Matte, Tapponnier et al.,1996) since 1970. The models, which mainly depend on result of geological survey and other geophysical observation in the region excepted Deep Seismic Sounding, remained unsure because of blank(or absence ) of DSS data until our experiment was performed. How Tarim and west Kunlun to contact in depth ? What different is in crust structure between Tarim and west Kunlun Mt.? This is what we will reply to in our *** finished the program in 1997. A total of 12. set seismograms (with 3.|component sensors) and 18000kg (AT and TNT) dynamos were used for the DSS field project. 6 shot in Tarim basin and 1 shot in west Kunlun Mt. (Quanshuigou) had been shoot successfully. One shot (Pishan shot) is used as fan\|shape observation (offset is from 150km to 2.0km) in 6 shots located in Tarim basin. The survey line is along Hotan river across the Tarim basin from the north to the south. In particular, we carried 2. set seismic recorders to Kunlun Mt. to make a short line about 60 km as the southern tendency of our line. The seismic recorders were placed in an interval of 3.m from one stations to the next and covered a distance of more than 3.0km. The stations have to be moved their location per 2.|shotting to form a meeting system or a tracing system (layout). Fig.1 showed our survey line and location of shot as well as recorder stations. Finally we gained 62. cassettes with original seismic record (include cassettes of shooting time recorder et al.). After data process total 1147 quite high\|quality three\|component digital records have been used to analyze. Here, only results of analyzing P wave data is given.

关键词： seismic evidence tectonic interaction Tarim West Kunlun Mt.

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