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    Metallogeny of Copper Ores from the Lancangjiang Metallogenic Belt in Western Yunnan
    滇西澜沧江成矿铜成矿学研究
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    Study on the Metallogenic Series of Cobalt Deposits in Eastern Kunlun Orogenic Belt
    东昆仑成矿钴矿成矿系列研究
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    Deeo-Space Metallogenic Predication Study and Its Application in Jiaojia Gold Belt of Shandong
    山东省焦家成矿深部金矿成矿预测研究及其应用
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    Middle Proterozoic Tectonic Morbile Belt and Mineralization in North Continental Margin of the North China Plateform
    华北板块北缘中元古代大陆边缘构造活动及成矿
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    Studies on Oil/gas Reservoir-forming in the Thrust Belt on the West Part of the Northern Margin in the Qaidam Basin
    柴达木盆地北缘西段冲断油气成藏研究
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  地带
    And M≥7 strong earthquakes occur alternately from one belt to another in period of every 90 years.
    M≥7级强震在这两个带內交替发生谝“谠硕?由于喜马拉雅弧的弹性反作用,在青藏高原内东经90°附近,即喜马拉雅弧垂直线两侧地带出现一个中强地震活动带。
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    5.a belt region of 90°E+2°;
    ⑤纵贯新青藏90°E±2°线地带;
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    Comparative studies suggest that the Lanping Simao depressed belt of Gansu Qinghai Xizang plate(J 2 E 1), Talimu plate (C, K E and Q) and North China plate (O) be regarded as sites favourable for potash deposition but the redbed basins widespreading in East China and aged K E times not.
    通过分析对比认为,甘青藏板块兰坪-思茅拗陷带(J2-E1、Q),塔里木板块(C、K-E、Q),华北板块(O2),华南板块(T1-2)为成钾有利地带,中国东部众多的K-E红层盆地中成钾条件较差
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    ANALYSIS AND EVALUATION OF RADON SURVEY RESULT IN RELATION WITH FAULT ACTIVITY IN NORTHERN QINLING BELT
    北秦岭地带断裂活动性氡气测试成果分析评价
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    COMPARISON BETWEEN HOLOCENE ENVIRONMENTAL CHANGES IN NORTH CHINA AGRO-PASTORAL ZONE AND AFRICA SAHELIAN BELT
    中国北方农牧交错带与非洲萨哈尔地带全新世环境变迁的比较研究
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    A Comprehensive Remote Sensing-structure Analysis of the Complicated Structural District in Orogenic Belt
    造山带复杂结构构造区遥感——构造综合解析
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    Mesozoic Sedimentology, Basin Analysis and Tectonic Evolution in the North Margin of the Dabie Orogenic Belt, China
    大别造山带北缘中生代沉积学、盆地分析和构造演化
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    Metallogenesis and Mineral Resources Assessment in Eastern Kunlun Orogenic Belt
    东昆仑造山带区域成矿作用与矿产资源评价
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    Study on the Gold Mineralization System in Xiejiagou-Shichengkuang Structure-magma Belt, Zhaoyuan, Shandong
    山东招远市谢家沟-石城夼构造岩浆带金成矿系统研究
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    Early Paleaozoic Tectono-magmatism and Mineralization of the Eastern Section in the North Qilian Orogenic Belt
    北祁连造山带东段早古生代构造岩浆作用及成矿的研究
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  belt
Effect of soil water changes on photosynthetic characteristics of Taxodium distichum seedlings in the hydro-fluctuation belt of
      
Four different kinds of water treatment were applied to examine the photosynthetic characteristics of baldcypress (Taxodium distichum) seedlings in the hydro-fluctuation belt of the Three Gorges Reservoir area.
      
distichum takes on the features of a water-tolerant and hydrophilic plant, which can be considered as one of the species for the building of a forest protection system for the hydro-fluctuation belt in the Three Gorges Reservoir area.
      
Given these facts, some management measures for conservation and restoration of the riparian forests are proposed, including the establishment of riparian forest buffer belt, bank stabilization measures, and maintenance of flood protection.
      
The bamboo Fargesia nitida, one of the giant panda's main food sources and the dominant shrub species of the forest understory, is mainly distributed in the dark coniferous belt in western Sichuan and southern Gansu in China.
      
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Ⅰ. The Yinshan district as an example of "activizing region" in the Chinese platform One of the most typical localities that show clearly the phenomenon of"activization of platform" (активи. зация платформы) is the Yinshan region, aneast western mountain range on the border between the North-China plain andthe Mongolian plateau. It has long been recognized as a platform because ofthe presence of a folded foundation Pre-Sinian in age. However, owing to thefacts that Mesozoic crustal movements and magmatic activities...

Ⅰ. The Yinshan district as an example of "activizing region" in the Chinese platform One of the most typical localities that show clearly the phenomenon of"activization of platform" (активи. зация платформы) is the Yinshan region, aneast western mountain range on the border between the North-China plain andthe Mongolian plateau. It has long been recognized as a platform because ofthe presence of a folded foundation Pre-Sinian in age. However, owing to thefacts that Mesozoic crustal movements and magmatic activities are importantwithin this area, some geologists including G Schoenmann, hold that it is ageosynclinal region. It is Ю. М Шейманн who first noticed the phenomenon of activizationappearing in the Chinese platform. В. М. Синицын in his "Строенив и развитиекитайской платформы" indicates that some of the mountain ranges includingYinshan, which have been formerly referred to the folding belts developingfrom geosynclines, are in fact the internal structures of the Chinese platform. In this paper the writer after the opinion of В. М. Синицын, assigns theYinshan area as one of the "activizing regions" in the Chinese platform, andgives more detailed descriptions and discussions mainly on the point of thehistory of its stratigraphic development. Really it is a fact that the Yinshan region has an old folded foundationwhich is composed of metamorphic complex including chiefly gneisses, schists,and old granitic intrusions apparently Pre-Sinian in age. Since the formationof this folded foundation during the Luliang movement (=Goto-Karelian mo-vement), the old land of the Yinshan region has "activized" or "resurrected"several times. As early as in the Sinian period, a depression prolonging in E-Wdirection happened on its southern border, where Sinian limestone 900 metresin thickness and in some places up to 9,620 metres was so deposited. During a long time of the Palaeozoic era, the Yinshan old land was in the poriod ofdenudation except some Cambrian marine limestones only 144 metres in thick-ness deposited in the western part. At the end of the Palaeozoic era, local acti-vization with the formation of continental basin-deposits of Permian age, up to1,380 metres in thickness, as found in the Tachingshan area again happened.In the middle Mesozoic era, the Yinshan region came to a period of strongactivity. Structural depressions duo to "Процесс аркогенеза" occurred universallywithin the whole area and magmatie activities in large magnitude associatedthis crustal movement, so that a great sequence of freshwater basin-depositswith intercalations of volcanic beds, up to 8,000 metres in total thickness wereformed. During the formation of these strata, especially at the end of Mesozoic,interruptions of depositon happened frequently, folds and thrusts were abund-antly formed, and intrusive bodies of "young granite" were produced hereand there. In the Tertiary period, the Yinshan region was violently faulted, andvolcanic activities still happened, producing the basalt lava flow spreading ina wide area. The activity of the Yinshan old land has not ceased even to-dayas shown by the facte that its whole area is in the process of uplift and by thepresence of an earthquake zone known in the historical time. Ⅱ. To what Geotectonic Unit does the Southeastern Coastal Region of China Belong? On the Southeastern coast of China there is a district where geotectoniccharacteristics have never been recognized clearly. It is A. W. Grabau who firstreferred it to an old land named "Cathaysia". J. S. Lee holds the same opinion.In his geotectonic map of China, B. M. Синицын also assigns this region to aplatform and marks it as a part of his "Южно-китайский платформенный массив".However, there is still another opinion opposed to this. A. C. Хоминтовский, forinstance, renders recently this district to a geosynclinal region and proposes thename "Minche Pacific folding zone" for it. H. T. Yang and T. Y. Yu agreewith him. In the year 1954, the writer in his compilation-work connected with thegeology of Fukien and Kwangtung, found that the geotectonic characteristics ofthe southeastern coastal region of China are not only unagreeable with thosefound in a common platform on the one hand, but also contrasting, with thoseof a geosynclinal region on the other. In fact, it cannot be referred suitably toany geotectonic unit except to the intermediate type as shown by the history ofits geological development. Apparently it is an "activizing" or "resurrected" platform. During the Pre-Sinian crustal movement (the Luliang movement), a foldedfoundation composed of old gneisses, schists, and phyllites was completely for-med. Obviously this is a part of the broad old land of Southern China. In the earlier stage of the Palaeozoic era, the whole area of this region wasexposed in the air and under denudation. Hence, no deposit of any kind wasformed. After the Caledonian movement, depressions happened in the western partof this region, where the Devonian-Lower carboniferous continental deposit, theNanching series consisting mainly of quartzite, conglomerate and shale has beenformed, but the other parts were still under denudation. These facts show thatthis region was still a land at that time. Uralian and Lower Permian limestones, known respectively as the Chuan-shan limestone and the Chihsia limestone, separated from each other by adisconformity, spread widely in this region. This indicates that the marine trans-gressions really happened in the southeastern coastal region of China. However,the thicknesses of these limestones (only 30 metres and 150 metres respectively)and their uniformity in the horizontal direction show that the sea at thosetimes was shallow, and the magnitude of subsidence of the earth crust withinthis region was small. The unnoticed lateral changing of lithological charactersof these limestones proves the same fact. Undoubtedly these limestones arenothing but the marine deposits of platform-type. From Upper Permian toTriassic, this region was under a condition of alternation of transgression andregression of the sea. Owing to the fact that the amplitude of oscillation of theearth crust of this region at that time was small, the deposits formed duringthe marine transgression were thin and interrupted again and again by disconfor-mities (or even unconformities). Sometimes continental deposits are intercalated. Since the later period of Triassic, the southeastern coastal region has neverbeen covered by the sea again. And, a new condition began to happen in LowerJurassic. Here, the old land became to "resurrected", so that a series of depres-sing belts were formed as a result of "Процесс аркогенеза". In association withthe subsidence of these depressions, continental beds with a total thicknessup to 3,000 metres were deposited. In the beds interruptions frequently occurred.Folds were abundants, although they or at least some of them were intermediatetype. At the same time, magmatic activities were significant. Itappearedfirstly in the form of volcanic eruptions as recorded by a great sequence of beds consisting of tuff and rhyolite intercalating in the continental bedsmentioned above. And then, at the end of the Mesozoic, numerous graniticbodies were produced. Coming to the Cenozoic era, this region still sufferedfrom rather strong crustal movements accompanied by basalt lava eruptions. Theactivity of the old land has not yet been ceased even to-day as marked by thepresence of a famous earthquake zone between Kwangtung and Fukien, and theabundance of hot springs which widely spread within this region. All theseshow the typical characters of an "activizing" or "resurrected" platform. Final-ly, the complexity of the types of mineral deposits found in Fukien and Kwang-tung also proves the geotectonic nature of this region. Summarizing the whole matter, we may say that the southeastern coastalregion of China was originally an old land. Although it has been agian andagain submerged by the sea, the resulting marine deposits are entirely differentfrom those of geosynclinal region. In the middle of Mesozoic, this region beganto be active violently again, producing a series of depressions or "secondarygeosynclines", in which thick continental beds were deposited, and, at the sametime, folds of intermediate type, serious volcanic eruptions and magmatic intru-sions were produced. Hence, to refer the southeastern coastal region of China toan "activizing" platform is quite strongly proved. The northwestern boundary of this "activizing" platform is generally onthe line starting from central Chekiang through central Kiangsi to the Sou-thwestern part of Kwangtung, because the history and characteristics of geolo-gical development of the Southeastern Kiangsi and Central-southern Kwangtungare quite similar to those of Fukien and Eastern Kwangtung. As to the nomination of this geotectonic unit, the writer proposes to callit "Cathaysian activizing region". This name is derived from the "Cathaysia"of A. W. Grabau but adds, according to necessity, the meaning of activizing or"resurrected" characters of this region. The so-called "Minche Pacific foldingzone" of A. C. Хоминтовский is obviously unacceptable because it entirely doesnot coincide with fact. Compared with the "aetivizing" platforms found in other parts of theworld, the Cathaysian coastal "activizing" platform has its own characteristics,especially shown by the presence of numerous, widely spread, small depressionsor "secondary geosynclines", and the acidic magmatic activities appearing on alarge scale. All these indicate that this is a special type differing from all theknown "activizing

~~

In recent years, the geotectonic problem of China engages the attentionof many Chinese and Soviet geologists, but different opinions are confessed by different authors. After studying the structural characters of the fundamentalfloor and its later geological development, theauthor of this paper agrees withthe statement of the Soviet geologist, B. M. Синицын. In 1952 he pointed outthat the Chinese platform in eastern China, may bs divided into: (1) theSine-Korean platform; and (2) the Southern-Chinese platform,...

In recent years, the geotectonic problem of China engages the attentionof many Chinese and Soviet geologists, but different opinions are confessed by different authors. After studying the structural characters of the fundamentalfloor and its later geological development, theauthor of this paper agrees withthe statement of the Soviet geologist, B. M. Синицын. In 1952 he pointed outthat the Chinese platform in eastern China, may bs divided into: (1) theSine-Korean platform; and (2) the Southern-Chinese platform, consolidatedas a result of the Luliang movement. This Chinese platform especially in its southern part shows a very peculiarphenomenon as it is called "Activization" of the platform. During Sinian andPaleozoic, its sediments belonged to the pronounced epi-continental type, duringthe mesozoic the south-eastern part of the Southern-Chinese platform wasneither a stable shelf nor a geosyncline, but an intermediate type between them.Its characters were really not geosynclinal, but sometimes showed geosynclinalaffinities, as for instances, the immense granitic intrusions, the eruptions oflavas, and the rather strongly folded geosynclinal structures. These imply thelimited mobility or the incomplete consolidation of the underground. Accor-dingly, referred to the structural type of this region, P. Misch called it"Sinotype". Furthermore, in the Southern-Chinese platform, two strong "Activizingunits" are recognized as follows: 1) The Hunan-Kwangsi activizing andsubsiding region; 2) The Cathaysian activizing oldland. The "Activization"of these regions lasted for a long geological time. It began in Sinian, throughCaledonian, Variscian, Indo-Sinian, Yenshanian and even Himalayan. BeforeMesozoic, the Caledonian was the most intensive and widely distributed one.But as pointed out by A. H. Мазарович, the Caledonian of the Southern-Chineseplatform was merely a fold-belt within the platform. According to its geotectonic history, its character of sedimentation, itsregional metamorphism, its igneous activity and its geotectonic systems, suchas "Kwangsi ∈ system", "North-Kwangtung ∈ system", "Meso and Neo-Cathaysiansystem", and the "Nanling eastwest tectonic zone", it is the author's opinionthat the "Imtermediate type (Sinotype)" of the Southern-Chinese platform wasdeveloped gradually through a long "Activizing process". This "Sinotype" is anintermediate type between the stable shelf and the geosynclinal region.

作者同意B.M.西尼村的意见,认为中国地台是中国东部的一个大的构造单位,它是在吕梁运动后造成的。中国地台由两个主要部分构成,它的北部称中朝地台,南部称华南地台。中国地台有一很重要的特征,就是一个“活化”的地台。华南地台的东南部“活化”尤其强烈而显著,在中生代的太平洋运动时,差不多具有类似地槽的特征。但是它的“活化”是有悠久历史的,即开始於震旦纪,所以加里东运动给与很大的影响,但加里东运动只是地台内部的褶皱。地台“活化”直到中生代太平洋运动才得到高度发展,产生巨大的火成活动以及“中国式”的构造型式。新生代时地台还有中等强度的运动和火成活动。自第四纪冰期之后,地台仍在较弱的升降运动中。华南地台无论从沉积岩相、区域变质及火成活动,或从山字型、华夏式及南岭东西褶皱的构造体系等构造型式发育史的研究,都可以看到它的“活化”过程,在这过程里发育了“过渡类型”的构造形态,这都是不同放地槽或地台的构造形态的。本文是作为学习心得性质的初步尝试,文中不成熟和谬误之处尚多,希望得到大家的指正。如果能在集体的讨论和研究之下将我国大地构造研究清楚的话,这是作者所衷心期望的。

The original conception of the Sinian stratigraphy and correlation of southern China should be revised on account of the following geological informations: (1) The unconformable relation below the Nantou Sandstone, which commonly occurs within the axial parts of the Kiangnan geanticline, and which was taken to represent the lower boundary of the traditional Sinian system, changes into conformable contact on the southern limb of the Kiangnan geanticline; (2) The absolute ages of the granites unconformably overlain...

The original conception of the Sinian stratigraphy and correlation of southern China should be revised on account of the following geological informations: (1) The unconformable relation below the Nantou Sandstone, which commonly occurs within the axial parts of the Kiangnan geanticline, and which was taken to represent the lower boundary of the traditional Sinian system, changes into conformable contact on the southern limb of the Kiangnan geanticline; (2) The absolute ages of the granites unconformably overlain by the Nantou Sandstone have been determined to be around 700—800 million years, which are just about corresponding to the age of the middle-upper part of the key Sinian section of the Jihshien area in North China. The present writers give new considerations about the Sinian stratigraphy and correlation of southern China according to the following principles and reasons: (1) In the areas, where Caledonian geosyncline inherited from the Hsuehfeng geosyncline, the Nantou Sandstone formation is generally conformable with the underlying low-graded metamorphosed sediments, and in such areas, the overlying sediments are closely related in characters with the underlying strata, and here the total thickness of these formations now considered to be Sinian in age, is usually much greater. On the other hand, in those areas, where the younger sedimentary basin was superimposed upon the folded Hsuehfeng geosynclinal sediments, as occurring within the axial parts of the Kiangnan geanticline, the Nantou Sandstone then lies unconformably upon the more intensely metamorphosed sediments, and there the Sinian system is generally incomplete in section. (2) Although the tradi tional Sinian system of the South China geosynclinal regeion possesses the characters of geosynclinal sediments, it attains a total thickness of only 1000—3000 meters, which appears to be rather insufficient when compared with the vast thickness of some 10,000 meters of the Sinian system in the Yenshan subsidence zone of northern China. (3) The absolute age of the Jiulinshan granodiorite is dertermined to be 837 millions years, which is just corresponding to the age of the middle-upper part of the Sinian system in North China, while the age of the lower limit of the Sinian of northern China is generally accepted to be 1200—1400 millions years. From the above-stated reasons, the present writers are inclined to take the unconformity surface below the upper Banchi Group, (which represents the Tung-an movement), as the lower boundary of the Sinian system of southern China. Thus, the upper Banchi Group is now considered to be the lower part of the Sinian, and the traditional Sinian system of southern China is now taken to represent the upper Sinian. The Hsuehfeng movement of the Kiangnan geanticline marks the boundary between the lower and the upper Sinian. Based upon the above-mentioned scheme of the Sinian subdivisions, some historical developments of the region can be brought out: (1) The formational sequences of the lower Sinian of the South China Caledonian geosynclinal region are chiefly eugeosynclinal and partly miogeosynclinal in nature, but the formational sequences on the southern limb of the Kiangnan geanticline are slightly different in nature from that of the northern limb. Judging from the characters of sediments, the sedimentary environment on the southern limb was rather active while that on the northern limb was relatively stable. During the earlier period of the Sinian time in the Hsuehfeng-Caledonian geosynclinal region, a marginal belt on the north of the embryo Kiangnan geanticline and an inner (mobile) belt on the south can already be distinguished. (2) As a consequence of the Tung-an movement, the embyro form of the Kiangnan geanticline was formed. (3) In western Hunan, the Tungan movement was intense and it diminished in intensity eastward, and in southern Anhui it was represented by epeirogenic movement. However, the subsequent development displays the phenomenon to the contrary. The lower Sinian in southern Anhui and western Chekiang is represented by the typical eugeosynclinal formations, while in northwestern Kiangsi and western Hunan it is represented by either miogeosynclinal or eugeosynclinal formations. Such differences in intensities in earth movements along the regional structural line in a geosynclinal system show the unbalanced development of the Caledonian geosynclinal region in South China.

本文通过接触关系、厚度分析,结合绝对年龄资料,考虑地层剖面发育与构造关系,运用继承与上迭原则,认为继承构造部位剖面最完整这一理由,对江南地背斜带震旦纪地层提出了新的划分方案。新方案中的下震旦统包括上板溪羣及与其相当的上双桥山羣、瀝口羣、松木坞羣等浅变质岩系,以东安运动形成的不整合面作为震旦系与前震旦系的分界;旧称震旦系则归入上震旦统。上、下震旦统之间为雪峰运动形成的不整合面分开。在对上述地层的建造一构造分析的基础上,初步提出华南加里东地槽区江南地背斜带已经出现了南侧比较活动,北侧相对稳定的不对称性。另一方面构造发展在沿走向上也表现了不均一性,东安运动在江南地背斜带的西段表现明显,而到了东段就逐渐消失。

 
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