Abstract:贵州台江下中寒武统凯里组中产有丰富的、保存良好的Treptichnus Miller，计5个遗迹种（其中包括2个新遗迹种）：T．bifurcus Miller，T．pedum（Seilacher），T．pollardi Buatois and Mdngano，T．arcus n．ichnosp．和T．taijiangensis n．ichnosp．，并与节肢动物的觅食迹、爬行迹和游泳迹等共生，属Cruziana遗迹相。产于凯里组的Treptichnus可能为节肢动物的居住迹。随着造迹生物身体的增长和沉积物的增厚，造迹生物在原潜穴的基础上不断地开拓新的潜穴，而构成三维空间复杂的潜穴系统。

Abstract:贵州瓮安磷矿陡山沱组磷质岩中含有丰富的磷酸盐化球状化石，化石常为一些微型隧道所贯穿，这些微型隧道有生物成因和非生物成因解释。通过详细观察，发现隧道的末端常见一个黄铁矿颗粒，其大小与隧道宽度一致；隧道内壁发育有平行的纵纹，在化石壳面上发育的隧道底部常见呈棱角状的突起，在隧道转折处多呈尖凸的棱角状。这些隧道的成因应与黄铁矿关系密切，隧道为有机质降解产生的气体形成了足以使黄铁矿颗粒前导面胶磷矿溶解的压力、并驱使黄铁矿颗粒移动所形成的拖曳痕。

Abstract:在昆仑山南部西大滩与东大滩谷地,沿西大滩活动断裂发育大量串珠状斜列分布的地震鼓包,与不同类型的地震破裂、地震楔、地震陡坎和地震凹陷伴生,在探槽剖面表现为全新世砂土层和晚更新世砾石层的背斜褶皱变形;地震鼓包长轴走向290°~300°,与西大滩活动断裂呈10°~20°交角,锐角指示西大滩断裂左旋走滑运动方向。对探槽剖面不同层位的沉积物、断层破碎带和地震崩积楔分别取样,进行热释光和光释光测年,发现西大滩断裂的地震鼓包主要形成于全新世早期,对应于10.2ka BP、8.6~8.7ka BP、7.0ka BP、6.10ka BP4期古地震事件。估算西大滩断裂全新世早期强烈地震的复发周期为0.9~1.7ka,断裂左旋走滑速率为5.3~10.0mm/a,平均约7.7mm/a。全新世晚期西大滩断裂的构造活动性显著减弱,强烈地震向南迁移至库赛湖断裂。

Abstract:The Changxing Formation in the northeastern Sichuan Basin is in a marine environment, and can be divided into a carbonate platform sedimentary system and a basin sedimentary system based on sedimentary characteristics. The carbonate platform sedimentary system is further divided into such facies as restricted platform, open platform, platform margin reef and ramp. In this paper we discuss spatial distribution of the sedimentary facies belts, and argues that the Kaijiang-Liangping ocean trough does not exist. The Changxing Formation is the result of a deep-water environment relative to platform, and it is located on a carbonate ramp, instead of an ocean trough. We point out that platform margin shoals and organic reefs are the best favorable facies belts of reservoirs, and reef dolomite and grain dolomite are the favorable microfacies of reservoirs. Organic reefs in the study region form a patch reef group on the carbonate platform margin ramp and they are interruptedly distributed along the platform margin.

Abstract:Regional biostratigraphic investigation of the Maokou Formation leads to the proposal that a rapid crustal uplift and doming prior to the eruption of the Emeishan basalts. This conclusion is also supported by spatial distribution and sedimentologic features of clastic rocks beneath the Emeishan flood basalts. Clastic rocks are distributed in the flanks of the domal structure. A lowstand submarine fan is found in the northwestern flank, at Pinchuan, Yanyuan county, which is mainly consisted of sandstone and conglomerate. A 60-120 m layer of conglomerate cemented by lava is discovered in the northeastern flank of dome, which is alluvial gravel fans formed as a result of rapid differential uplift. Gravels of the conglomerate at Xishan, Kunming are round in shape suggesting that they may be derived from sediments of paleocanyon. It is argued that clastic sediments are responses to uplift of mantle plume, which also caused emergent trend in facies and karst relief on erosion surface. These data not only confirm the plume initiation model for generation of the Emeishan flood basalts, but also deepen understanding of tectonic in western margin of Yangtze craton in late Permian.

Abstract:对阿尔泰造山带南缘喀拉通克和锡泊渡两个杂岩体的Sr—Nd-O同位素研究表明，两个杂岩体的同位素特征相似，均具有低的（^87Sr／^86Sr），和高的εNd（t）值（6．3～9．1），表明其来源于亏损的软流圈地幔，但是其δ^18O值（‰）大多大于6（5．4～10．2），表明有地壳物质的加入。Sr和O同位素表明，这种地壳物质的混入主要是源区的混入。根据Nd同位素模式年龄以及区域构造演化特征，可能是混入有早期俯冲的洋壳（可能是早古生代）的亏损地幔熔融的结果。然而，与锡泊渡杂岩体不同的是，喀拉通克杂岩体局部还经历了上部地壳的混染作用。此外，额尔齐斯深大断裂南北两侧镁铁质-超镁铁质杂岩体源区特征的相似性可能暗示了该断裂可能不是阿尔泰造山带和准噶尔造山带的分界线。

Abstract:胶东半岛三佛山岩体是昆嵛山杂岩体的重要组成部分，其岩性主要由二长花岗岩组成，位于苏鲁超高压碰撞带与胶东陆块之间的缝合带中。岩石化学特点具高钾钙碱性岩石系列特征，岩体为准铝Ⅰ型花岗岩，并具有高Ba—Sr花岗岩的岩石地球化学特征，即高Ba、Sr含量，高Sr／Y、La／Yb、K／Rb值，低Y（〈13μg／g）、Yb（1．8μg／g）、Rb／Sr比值（平均为0．33），弱的Eu负异常，亏损Nb、P、Ti等高场强元素。根据该岩体岩石地球化学特征、包体岩石学特征，并结合前人对高Ba—sr花岗岩成因研究成果，笔者认为该岩体可能是幔源基性岩浆与地壳熔融的酸性端元混合而成。混合后的岩浆没有明显的长石和云母类矿物的结晶分异作用，混合岩浆最大温度在750-800℃左右。酸性岩浆的源区以石榴子石＋辉石＋角闪石＋斜长石的残留为特征。残留相物质组成特征暗示源区应位于壳幔边界，深度30km土，结合早期形成的昆嵛山二长花岗岩源区深度大于40km这一现象，表明胶东地区中生代岩石圈减薄作用在110Ma达到最大，地壳厚度恢复至正常厚度。

Abstract:同源岩浆成因金矿的成岩成矿时差是确定矿床与岩浆岩成因关系的重要基础。而中国同源岩浆成因金矿分布十分广泛，前人在成矿学和岩石学方面做了大量的研究，为此本文收集了国内一些典型金矿的成矿和相关同源岩浆岩的同位素测年数据，讨论并定量厘定了该类金矿床成岩成矿时差的分布特征及分布范围。数据统计分析及柯尔莫哥洛夫准则检验结果显示，成矿事件一般同步或略滞后于同源岩浆活动，成岩成矿时差在95％信度下服从正态分布，介于0～16．0Ma，均值约为7．0Ma。因此，若金矿成岩成矿存在着≤16．0Ma的时差，就应该重视二者之间的同源成因联系。同时，笔者也强调：准确的成岩成矿时差应加强对金矿成岩成矿地质背景的研究；重视时差研究与微量元素和同位素示踪相结合，从年代学和地球化学方面对矿床成因作出合理的解释。

Abstract:辽西凌源地区义县组的下部层位为大王杖子层，通过对该层位及相关层位样品中锆石的LA—ICP—MS的U—Pb测年，获得大王杖子层的形成年代为125～122Ma。经过综合分析，得出以下初步结论：①辽西凌源地区与北票-义县地区的义县组底界是不等时的；凌源地区义县组下部层位在时代上相当于北票-义县地区的义县组尖山沟层（砖城子层）；②凌源地区的张家口组与义县组之间有约5～6Ma的时间间隔。这不仅验证了凌源地区张家口组与义县组之间为角度不整合接触的可靠性，也暗示该5～6Ma的间隔期为冀北-辽西地区中生代构造格架转换的关键时期；该时期也是我国东北地区中生代岩浆作用的鼎盛时期；同时在冀北-辽西地区，该间隔期之后发生了热河动物群的大爆发，说明该间隔期也是一个重要的生物界限。

Abstract:青藏高原东段三个斑岩型矿床(玉龙、马厂箐和西范坪)产出于大陆碰撞环境,与喜马拉雅期埃达克质斑岩有关,并为新生代大规模走滑断裂所控制.在印度-亚洲碰撞带东部3个斑岩Cu-Mo-Au矿床已识别出3个明显的成矿幕次①玉龙矿区,石英-绢云母蚀变带中的硫化物石英脉辉钼矿Re-Os等时线年龄为40.1±1.8Ma, 与赋矿围岩二长花岗岩的锆石SHRIMP年龄40.9±0.1 Ma一致,表明Cu-Mo 矿化发生在斑岩岩浆作用的晚期阶段(约40Ma), 但热液系统至少延长到约36Ma,热液系统持续时间大于4Ma, 其间,构造控制的高级泥化蚀变叠加于早期斑岩型矿体中高硫化物矿化之上形成富矿体.②马厂箐矿区,辉钼矿Re-Os等时线年龄为35.8±1.6Ma, 与容矿花岗岩的锆石SHRIMP和全岩Rb-Sr 年龄 (35～36Ma)一致,但早于含金石英正长斑岩的全岩K-Ar 年龄 (31～32 Ma),表明马厂箐斑岩热液系统的寿命为约4Ma, 其间,约36Ma有钾硅酸盐蚀变和Cu-Mo矿化, 而同Au 矿化密切的高级泥化蚀变发生在晚期 (31～32Ma).③西范坪矿区,钾硅酸盐蚀变带内辉钼矿等时线年龄32.1±1.6Ma最年轻,晚于热液蚀变黑云母和角闪石的K-Ar年龄33.5～34.6Ma, 很可能反映了斑岩热液系统在约32 Ma终止,如此短时的热液系统正是导致西范坪绢云母化蚀变微弱和高级泥化蚀变的缺失的原因.斑岩热液系统的寿命与矿床金属吨位(规模)的正相关,本区巨量玉龙斑岩铜矿可能与其热液活动时期延长有关.而热液系统的延长又与多期次的岩浆侵入有关.因此,从走滑挤压场(55～40Ma)到走滑拉张场(24～17Ma)的构造应力转换期内,幕式的应力松弛引起多期岩浆侵入是导致印度-亚洲碰撞带内热液系统的延长和叠加成矿作用发生的关键.

Abstract:Foreland basins in China are characterized by enrichment of natural gas due to the existence of coal measures strata source rock. Multi-stage reservoir forming and the accumulation of oil and gas represent the important features of the foreland basins in the middle and western parts of China. Its prevailing geologicalcontrols include their complex tectonic development involving superimposed basins, the development of paleo-tectonics and the formation of multiple hydrocarbon source rock/reservoir combinations. In foreland basins, There are three sets of combinations of reservoir and cap rocks and two pool forming systems in foreland basins including self-source and derived-source, which control the distribution of oil and gas in vertical direction. The different characteristics of structural belts in foreland basin play a controlling role in the distribution of oil and gas. Oil reservoirs in the thrust belts and forebulge are located in the lower reservoir forming system while oil reservoirs in the depression are distributed in the upper reservoir forming system. Oil reservoirs formed before are destroyed and become oil seepages, asphalt or residual oil reservoirs in the piedmont while relatively more matured gas is accumulated in the foreland thrust belt and in the depression. The slope zone and the forebulge belt are the accumulatingareas for the early formed oil/gas and relatively matured gas which formed latter.

Abstract:Late-stage accumulation of natural gases is beneficial for the preservation of gases for the gases have bigger diffusing capacity than petroleum. The Neotectonic movement is the last event on a large scale in China's tectonic evolution history. The movement controlled the natural gas accumulation dramatically. As for source rocks with late hydrocarbon generation, the traps developed by the Newtectonics can well match the late gas generation. This will certainly benefit late gas accumulation. As for early-formed gas pools, the Neotectonics may adjust the gas pools vertically or laterally to form new gas pools. In addition, the Neotectonics can also improve the storage capacity of some reservoirs. The Neotectonic movement not only produces traps, but also causes fractures, which connect the source rock and the reservoir to be a pathway for gas migration. Episodic gas accumulation can easily occur during the Neotectonics, which will bring about high efficiency of gas supply and thus gas pools can be easily formed. Besides, Neotectonics will probably destroy early-formed gas pools in areas of violent tectonics.

Abstract:The paper presents SHRIMP U-Pb dating results of zircon and ~ 40 Ar/ ~ 39 Ar dating results of hornblende from the Mamba granitoid cropping out in the Gangdise tectonic belt. The ages were dated to be 207 Ma and 215 Ma respectively, suggesting that they were formed during the late Triassic. Geological and geochemical studies show that the Mamba Granitoids include biotite hornblende granodiorite and biotite adamellite, which were formed in an island-arc environment. Mamba granitoid and the late Triassic calc-alkaline volcanics (the Yeba Formation) cropping out near Maizhokunggar to the south of Mamba constitute a typical rock association related to plate subduction, which suggests that the Neotethys subducted before the late Triassic.

Abstract:对四个吸附铜的坡缕石的解吸附实验研究表明，被解吸附的铜来自于坡缕石的表面和纤维状晶体的网状空隙。吸附铜的坡缕石的X射线光电子能谱（XPS）上出现了932．5eV和933．7eV的光电子峰，表明坡缕石表面的铜以Cu^＋和Cu^2＋的形式存在；傅立叶变换红外吸收光谱（FTIR）上八面体离子的吸收峰出现规律性偏移，其中Mg3OH和Al2□OH吸收峰向高频方向移动了3～5cm^-1，部分铜离子进入到坡缕石的晶体结构的通道中；电子顺磁共振谱上（ESR）出现了g=2．34、2．12、2．08和2．05等4个信号：表明铜离子位于H^＋难以到达的位置。吸附铜的坡缕石的矿物学研究及其解吸附实验的结果均表明铜在坡缕石中以3种形式存在：①以Cu^＋和Cu^2＋的形式吸附在坡缕石纤维的表面，与坡缕石表面的悬空氧成键；②以ECu（H2O）4]^2＋的形式存在于坡缕石的晶体结构的微空腔中（通道）；③以Cu^2＋的形式存在于坡缕石晶体结构中的硅氧四面体六元环的底部或八面体位。

Abstract:通过对湖南骑田岭岩体芙蓉超单元南溪单元中粒斑状角闪石黑云母二长花岗岩、芙蓉矿田白腊水矿区的10号矿脉中蚀变花岗岩型锡矿石、19号矿脉中矽卡岩型矿石矿物、42号含矿花岗斑岩体和ZK801钻孔(80~90m)的细粒花岗岩的Rb-Sr、Sm-Nd和锆石SHRIMP U-Pb同位素年代学研究,分别获得南溪单元弱蚀变花岗岩全岩Rb-Sr等时线年龄为146±10Ma(95%可信度)和岩体锆石SHRIMP U-Pb年龄为155±6Ma(95%可信度),蚀变矿化花岗岩锆石SHRIMP U-Pb年龄为156±5Ma(95%可信度),10号蚀变花岗岩型矿脉矿石的Rb-Sr等时线年龄为137±5Ma(95%可信度),19号矽卡岩型矿脉的矿石—矿物Sm-Nd等时线年龄为133±15Ma(95%可信度);42号含矿花岗斑岩体锆石SHRIMP U-Pb年龄为146±5Ma(95%可信度);ZK801钻孔中细粒花岗岩全岩的Rb-Sr等时线年龄为140±7Ma(95%可信度)。上述精确的年代学研究结果表明,芙蓉超单元花岗岩侵位时间为燕山早期,而不是印支期。由此推测骑田岭芙蓉超单元花岗岩形成于早—中侏罗世,它的构造环境可能为地壳处于强烈剪切挤压晚期,而区内花岗斑岩和细粒花岗岩岩浆活动可能发生在140~145Ma之间,其构造环境可能为地壳由挤压剪切向拉张伸展转化的时期形成的;白腊水矿区不同类型矿床年代学研究结果(133~141Ma)清楚地表明,其成矿作用的时间与区内花岗斑岩和细粒花岗岩的岩浆活动时间有明显的耦合关系。据此推断,骑田岭芙蓉锡矿是在晚侏罗世,地壳由挤压剪切向拉张伸展转化的时期形成的。而与芙蓉花岗岩主体侵入岩浆活动无直接成生关系。

Abstract:首次采用SHRIMP锆石微区U-Pb测年技术,对雷门沟花岗斑岩体进行年代学研究,通过对花岗斑岩中单颗粒锆石25个样品点的分析,获得了两组年龄数据,其中有11个分析点形成谐和年龄,其206Pb/238U年龄范围在129.1±3.0~138.4±2.3Ma之间,加权平均值为136.2±1.5Ma;另外9个分析点的207Pb/206Pb年龄集中于1884±20~2629±7Ma;前者指示了雷门沟岩体的结晶年龄为侏罗纪—白垩纪之交。后者则代表了岩体侵位过程中捕获的太华群锆石的年龄。首次采用ICP-MS法测定雷门沟斑岩型钼矿中的辉钼矿Re-Os同位素年龄,获得其模式年龄为131.6±2.0~133.1±1.9Ma,加权平均值为132.4±1.9Ma,指示了雷门沟钼矿床的成矿年龄。两种精测方法获得的年龄相吻合,成岩与成矿大致同时或成矿略晚于成岩。测试结果表明雷门沟斑岩钼矿与金堆城等东秦岭钼矿带其他钼矿床基本同时形成。

Abstract:The aim of this study is to investigate molecular organic geochemical characteristics of the Lower Palaeozoic carbonate rocks by analyzing carbonate rocks from some drills in the buried hill zones such as Chegu, Yigu and Zhuanggu in the Jiyang depression. The results show the biomarker distributions and carbon isotopic compositions of bitumen A from these Lower Palaeozoic carbonate rocks, and they can be used to identify potential indigenous oils and gases in the Lower Palaeozoic of the Bohai Bay area. In addition, the study also indicates that the n-alkane fractions of crystal-enclosed organic matter in carbonate rocks have obvious different distributions and carbon isotopic compositions from those in bitumen A. The main characteristics of the early organic matter are still reserved in crystal-enclosed organic matter, so they can be used for discussing the paleoenvironment.

Abstract:This paper uses various data such as well logs and drilling records to study the characteristics of palaeo-biota fossil combination and clay minerals from the variegated mudstone in the Shinan area of the Junggar basin, and analyses their lithologic and electric properties. Based on age contrast of spores and pollens and analysis of clay minerals, it was proved that the variegated mudstone is a regional weathering crust. The study ascertained the boundary of the Cretaceous and the Jurassic and the initial sedimentary age of the variegated mudstone: The results show that the weathering crust exhibits planar zonation and vertical stepwise structure. Every unit has clear diagnostic log response. The variegated mudstone belongs to the Jurassic Xishanyao Formation and the Toutunhe Formation is generally absent in the Shinan area. The Cretaceous Qingshuihe Formation overlaps the variegated mudstone, while the Jurassic Xishanyao Formation is truncated by the variegated mudstone. The authors hereby made new boundaries between the Cretaceous and Jurassic, the Jurassic Toutunhe and Xishanyao Formations, and proposed a new division scheme.

Abstract:世界上的微细浸染型(卡林型)金矿床主要产于美国和中国。两地的这类金矿主要差异之一是:美国的这类金矿含铊较高,一般平均铊含量达到40×10-6~50×10-6,高者达到千分之几。而中国的同类矿床铊含量低得多,一般低于10×10-6。但是,我们发现广西横县南乡金矿是个例外,它的金矿石中铊含量平均达到56.62×10-6,是铊克拉克值的77.88倍,最高为436.8×10-6,居我国微细浸染型金矿床的铊含量之首,部分金矿石的铊含量已经达到铊的工业品位。这个特征与美国的卡林型矿床相似,与中国的大多数微细浸染型金矿床不同。尽管目前掌握的数据有限,但看来它有可能…