东川式铜矿伴生组分地质特征

东川式铜矿的成因，自否定岩浆期后热液成矿，转为以沉积—变质成矿为主流派观点以后，沉积—成岩期后成矿否定了客观存在的后期多元、多期叠加改造成矿的现象。本文由伴生组分特征研究入手，肯定了后期多元、多期叠加改造成矿的存在，希引起研究者重视，对找富铜矿及回收伴生的金、钴，均有现实的指导意义。     

沂沭断裂带内构造体系特征及其复合现象

沂沭断裂带是山东境内一条从北向南展布的巨大断裂带,主要由鄌郚—葛沟、沂水—汤头、安丘—莒县和昌邑—大店断裂组成。该带内构造体系的复合现象很发育,可概括为:褶皱构造的迭加;断层力学性质的迭加;断裂间的穿切;结构面的方位改变和岩脉或矿脉的穿切等。 根据构造形迹力学性质和构造体系的特征,确定上述构造形迹归属于东西构造带和新华夏系。     

Tectono-Sedimentary History of Southeastern Coast Region,China:a Synthesis

According to the ideas and concepts of systems dynamic of continent structure, using previous information related to the study area, combining analyses on orogenic belt, basin and magmatic rock, the present paper synthesizes the tectono-sedimentary development of southeastern coast region, China, with special emphasis on the mountain making, basining and magmafc activity. The tectonic evolution after Late Caledonian orogeny was dominated by alternating rifting and converging, subsiding and uplifting, mountain making and basining in central and southern parts of southeastern China and the adjacent regions to the east and west. Seventeen geologic events, nine events of plate or terrain convergence , and continental crust accretion, as well as eight events of intracontinental rifting and basin faulting , are closely related to the tectonic and sedimentary evolution of the study area. The accompanied intense and frequent sedimentation , folding , faulting , magmatism and ore-forming process allowed huge coal     

太行山中北段褶皱构造序列

太行山中北段中－深变质岩区的褶皱构造变形复杂，不同期次间叠加改造强烈，构造置换作用明显，作者采用变质岩区构造解析方法，在观察，测量，分析了大量构造面，线组构的基础上，划分出５期褶皱构造，建立了本区的构造变形序列，并认为构造变形经历了从强塑性变表到韧脆性变形的演化过程，反映出地壳从纵向增厚作用转变为变质核杂岩隆升的演化过程。     

北京石花洞第四纪钟乳石剖面的年代学研究

北京石花洞位于房山花岗岩体边缘向形带的东北扬起端,与北京猿人遗址南北相望。地层为460Ma前形成的中奥陶统马家沟组石灰岩,洞穴大形态从25Ma前的上新世开始形成,洞内钟乳石从0.37Ma前的中更新世开始形成。在中国岩溶洞穴中,北京石花洞的层数最多,洞穴钟乳石种类齐全,裂隙渗透水沉积的石盾多、体积大,滴水沉积的石笋叠置关系明显,池水沉积的月奶石发育好,全新世石笋微层理发育清晰。该洞的大形态反映了北京西山新构造运动的期次,可以同华北地文期和永定河阶地对比,洞内钟乳石记录了中更新世以来北京西山古环境的变化,可以建立第四纪剖面,与周口店洞穴群碎屑沉积物剖面进行对比。钙板的铀系年龄为334.99～366.74ka,可定名钙板组。粗犷石笋的铀系年龄为169～235ka,粗犷石笋的电子自旋共振年龄为130～518ka,为中更新世沉积,可定名云水洞组。杆状石笋的铀系年龄为14.9±2.1～100.3±11.1ka,为晚更新世沉积,可定名石花洞组。在全新世石笋中,微层与微层之间存在厚约1μm的条带状纹线,是划分微层层数的标志,具有微层理的石笋14C年龄为为0.58～2.50ka,AMS14C年龄为为130±100～670±130a,可定名守备支洞组。     

山东新城金矿床的叠加晕模式

１９８７年研究了Ⅰ号矿体地球化学异常特征,下部异常显示有深部盲矿前缘晕叠加,１９９４年探明的Ⅴ号矿体正好与其对应。１９９７年继续研究和建立了新城金矿的原生叠架晕模式,并用模式进行了预测。     

Distribution of Palaeozoic tectonic superimposed unconformities in the Tarim Basin,NW China: significance for the evolution of palaeogeomorphology and sedimentary response

Seismic and drilling well data were used to examine the occurrence of multiple stratigraphic unconformities in the Tarim Basin, NW China. The Early Cambrian, the Late Ordovician and the late Middle Devonian unconformities constitute three important tectonic sequence boundaries within the Palaeozoic succession. In the Tazhong, Tabei, Tadong uplifts and the southwestern Tarim palaeo‐uplift, unconformities obviously belong to superimposed unconformities. A superimposed unconformity is formed by superimposition of unconformities of multiple periods. Areas where superimposed unconformities develop are shown as composite belts of multiple tectonic unconformities, and as higher uplift areas of palaeo‐uplifts in palaeogeomorphologic units. The contact relationship of unconformities in the lower uplift areas is indicative of truncation‐overlap. A slope belt is located below the uplift areas, and the main and secondary unconformities are characterized by local onlap reflection on seismic profiles. The regional dynamics controlled the palaeotectonic setting of the Palaeozoic rocks in the Tarim Basin and the origin and evolution of the basin constrained deposition. From the Sinian to the Cambrian, the Tarim landmass and its surrounding areas belonged to an extensional tectonic setting. Since the Late Ordovician, the neighbouring north Kunlun Ocean and Altyn Ocean was transformed from a spreading ocean basin to a closed compressional setting. The maximum compression was attained in the Late Ordovician. The formation of a tectonic palaeogeomorphologic evolution succession from a cratonic margin aulacogen depression to a peripheral foreland basin in the Early Caledonian cycle controlled the deposition of platform, platform margin, and deep‐water basin. Tectonic uplift during the Late Ordovician resulted in a shallower basin which was followed by substantial erosion. Subsequently, a cratonic depression and peripheral or back‐arc foreland basin began their development in the Silurian to Early–Middle Devonian interval. In this period, the Tabei Uplift, the Northern Depression and the southern Tarim palaeo‐uplift showed obvious control on depositional systems, including onshore slope, shelf and deep‐water basin. The southern Tarim Plate was in a continuous continental compressional setting after collision, whereas the southern Tianshan Ocean began to close in the Early Ordovician and was completely closed by the Middle Devonian. At the same time, further compression from peripheral tectonic units in the eastern and southern parts of the Tarim Basin led to the expansion of palaeo‐uplift in the Late Devonian–Early Carboniferous interval, and the connection of the Tabei Uplift and Tadong Uplift, thus controlling onshore, fluvial delta, clastic coast, lagoon‐bay and shallow marine deposition. Copyright © 2015 John Wiley & Sons, Ltd.     

Classification of Complex Reservoirs in Superimposed Basins of Western China

<正>Many of the sedimentary basins in western China were formed through the superposition and compounding of at least two previously developed sedimentary basins and in general they can be termed as complex superimposed basins.The distinct differences between these basins and monotype basins are their discontinuous stratigraphic sedimentation,stratigraphic structure and stratigraphic stress-strain action over geological history.Based on the correlation of chronological age on structural sections,superimposed basins can be divided into five types in this study:(1) continuous sedimentation type superimposed basins,(2) middle and late stratigraphic superimposed basins,(3) early and late stratigraphic superimposed basins,(4) early and middle stratigraphic superimposed basins,and(5) long-term exposed superimposed basins.Multiple source-reservoir-caprock assemblages have developed in such basins.In addition,multi-stage hydrocarbon generation and expulsion,multiple sources,polycyclic hydrocarbon accumulation and multiple-type hydrocarbon reservoirs adjustment,reformation and destruction have occurred in these basins.The complex reservoirs that have been discovered widely in the superimposed basins to date have remarkably different geologic features from primary reservoirs,and the root causes of this are folding,denudation and the fracture effect caused by multiphase tectonic events in the superimposed basins as well as associated seepage,diffusion,spilling,oxidation,degradation and cracking.Based on their genesis characteristics,complex reservoirs are divided into five categories:(1) primary reservoirs,(2) trap adjustment type reservoirs,(3) component variant reservoirs,(4) phase conversion type reservoirs and (5) scale-reformed reservoirs.     

山东金青顶金矿床控矿构造特征及深部预测

金青顶金矿床位于山东牟平-乳山金矿带将军石-曲河庄断裂的南端,矿床围岩为昆嵛山花岗岩,属含金石英脉型金矿。本文通过矿床地质特征、围岩蚀变以及控矿构造特征等方面的研究,认为与成矿有关的构造活动至少划分为4期,基本控制着矿体的定位与分布。深部地球化学原生晕研究表明,矿体在垂向上具有明显的地球化学分带性,且在已知矿体下方出现近矿晕、前缘晕及尾晕特征指示元素构造叠加晕强度升高趋势。结合矿体在断裂中分布的规律以及原生晕特点,对金青顶矿床深部第二富集段进行了预测,推断在-1100m下有第二金富集段存在,且具有很大的经济价值。     

新疆东天山红石金矿床原生晕特征与矿体叠加模型

红石金矿床是新疆东天山康古尔塔格金矿带中的代表性矿床之一。通过对其地表、已开采中段及部分钻孔的岩石系统采样分析和计算统计,研究了各指示元素在不同位置的组合特征。结果表明:指示元素中Au、Ag密切相关,其他元素组合复杂多变,反映了成矿成晕的多期性、多阶段特点。结合实际勘查资料,采用多种计算方法,建立了矿床原生晕轴向分带模式,即矿床轴向分带(自上而下)为Bi-Mo-Hg-Zn-Pb-Ag-As-Cu-Sb-Au。利用不同中段的7个分带评价值指标确定了矿体的叠加模型。