中条山区前寒武纪铜矿床地质历史演化及成矿年代

中条山区铜矿床是在中条古裂谷地质构造环境中演化形成的。本文从涑水杂岩期－绛县期－中条期－西阳河期等不同时代地质历史演化，分别探讨了中条山区不同类型铜矿床时空分布和成因上的内在联系。它们早期形成的矿源层受不同时代的层位和岩性控制，但在后期的２０００～２１００Ｍａ和１８００～１９００Ｍａ较大规模的构造－热事件，对不同类型铜矿床进行了叠加和改造，使铜质进一步富集，最终形成工业矿床     

沉积作用水文地质期沉积水运移的阶段性

根据沉积水所承受的负载种类，把沉积作用水文地质期分为静水压力阶段，异常压力阶段及压实平衡阶段；讨论了各阶段沉积水的运移特征，沉积物释水过程及孔隙度，透水性的变化特点，对一些传统的水文地质研究方法提出了不同的意见。     

桂北雪峰期含锡黑云母花岗岩成因的见证

作者对桂北地区进行了野外地质工作，重点观察和研究了雪峰期含锡黑云母花岗岩和四堡群变质岩的产状和特征，并采集了它们的标本，进行了系统的岩矿鉴定、人工重砂分析和岩石化学成分对比，从宏观到微观总结出四堡群中、下部的变质岩与雪峰期的含锡黑云母花岗岩有成因关系的１０个方面的证据，并被高温高压成岩实验所证实。这些证据和分析方法对于研究华南古老变质岩地区的同类花岗岩有其重要意义。     

旋转针锥光下一光轴出露时快速测定2V的图解

为了简化旋转针锥光下一光轴出露时测定2V的赤平投影法的绘图手续,设计了本图解,只要测取θ,R,R′与φ四值,就能更快地求得2V值。     

Extension of the Louzidian Metamorphic Core Complex and Development of Supradetachment Basins in Southern Chifeng, Inner Mongolia, China

The Louzidian metamorphic core complex (LMCC) in southern Chifeng is located on the northern margin of the North China craton. Structural analyses of the LMCC and its extensional detachment system indicate that the LMCC experienced two-stage extension. The ductile regime experienced top-to-northeast shearing extension and the brittle detachment fault underwent top-down-outwards slipping. Between these two stages, a semi-ductile regime recorded the transition from ductile to brittle. The hanging wall of the detachment fault is similar to those classic supradetachment basins in western North America. Analyses of provenance and paleocurrent directions in the basins show that there were two filling stages. In the early stage, materials came from the southwest margin of the basin and the hanging wall of the detachment system and were transported from southwest to northeast; while in the late stage, deposits were derived from the footwall of the detachment fault and transported outwards to the two sides of the     

Carbonate alteration of the Upper Mount McRae Shale beneath the martite-microplaty hematite ore deposit at Mount Whaleback, Western Australia

The formation of large martite-microplaty hematite ore deposits in northwest Australia remains a contentious topic in part because important evidence supporting a unifying genetic model has not been observed at all deposits. Carbonate replacement of silica has been found along normal faults below ore at the Mount Tom Price and Giles Mini deposits, which suggests an early hypogene process during ore formation. However, such rocks have not been identified at the largest martite-microplaty hematite deposit, Mount Whaleback. In this study, samples of the Mount McRae Shale are examined for their chemistry, mineralogy and petrography. These samples were collected from several key locations, including an area that immediately underlies ore along the Mount Whaleback fault at Mount Whaleback. Compared to unaltered black Mount McRae Shale from Wittenoom Gorge in the north and altered black and red Mount McRae Shale at Mount Whaleback, reddish-green Mount McRae Shale along the Mount Whaleback fault is greatly enriched in MgO and CaO and depleted in SiO₂. This chemistry arises from significant amounts of fine- to medium-grained ferroan-dolomite and ankerite and cross-cutting chlorite and carbonate veins. The composition is distinct from that produced during regional metamorphism, and most likely represents hydrothermal alteration after metamorphism. The lack of carbonate-rich, silica-poor rocks in the overlying Dales Gorge Member at Mount Whaleback is consistent with pervasive oxidation of most rocks in the region during or after ore genesis, a process that removed carbonates. Although several questions remain unanswered, these results support models that invoke an early hypogene stage during the formation of the martite-microplaty hematite deposits in the Hamersley Province.Editorial Handling: B. Lehmann     

晚石炭世早期腕足动物地理区划

收集了全球范围内晚石炭世早期(Bashkirian--Moscovian期)的腕足动物化石共176属，同时参考珊瑚、菊石、植物等生物化石资料，将晚石炭世早期全球腕足动物划分为北极大区、特提斯大区和冈瓦纳3个大区．北极大区包括北美北部、北亚，晚石炭世早期腕足动物特征属为：Orulgania、Praehorridonia、Pseudosyrinx、Horridonia、Attenuatella、Tomiopsis、Syringothyris、Jakutoproductus、Alispirifer、Levipustula等凉水型分子；冈瓦纳大区包括南美南部、非洲南部、澳大利亚、我国藏南地区、印度、阿富汗等地区腕足动物典型属为：Levipustula、Alspirifer、Kitakamithyris、Syringothyris、Trigonotreta等凉水型分子；特提斯大区分布于晚石炭世早期中低纬度地区，包括西欧、中南亚、非洲北部、格棱兰岛北美南部、南美北部等地区．腕足动物特征属为Enteletes、Orthotichia、Neochonetes、Juresania、Derbvia、Retfculatia、Kutoreinella、Meekella、Anthracosoirifer、Kozlowskia等暖水型。     

Recurrence anomaly of ground water behavior before strong earthquakes in North China

By analyzing the relationship between ground water behavior and strong seismic activity during the past more than 20 years in North China, we have found similar water level descending variation of a part of wells in the short-term stage before several strong earthquakes. The characteristics of anomaly are: at the beginning, water level dropped abruptly or accelerated to drop; then it turned to slow rising with a smaller amplitude than that of descending; earthquakes occurred during the slow-rising process of water level, and at that time or before earthquake occurrence, water level rose with a large amplitude. Among more than 100 wells in North China, the descending anomalies were not recorded for many times, but similar variation processes of water level were noted at different wells before several strong earthquakes, which proves that seismic precursory anomalies of ground water are of certain recurrence features, occurring repeatedly before different strong earthquakes. Therefore, it is necessary to study the genesis of this type of anomaly and its relationship with strong seismic activity. Foundation item: Key project of Ministry of Science and Technology during the Tenth Five-year Plan (2001BA601B 01-01-01).     

贵州扁平紫松晚期-罗甸期的相对海平面变化特征

根据贵州紫云扁平剖面沉积记录，分析了该区在二叠纪早期的相对海平面变化特征。研究表明，扁平地区在早二叠世紫松晚期－罗甸期存在6次连续的三级旋回海平面升降过程，其中，海平面上升速率最快的是第3次旋回；水体深度最大的是第4次旋回；海平面上升幅度最大的是第5次旋回。该时期的Ting类生物事件可能与这些特征有关。     

Correlation and interpretation of paleosols and loess across European Russia and Asia over the last interglacial-glacial cycle

Loess-paleosol sequences of the last interglacial-glacial cycle are correlated from European Russia to central Siberia and the Chinese Loess Plateau. During cold periods represented by marine oxygen isotope stages (OIS) 2 and 4, loess deposition dominated in the Russian Plain and the Loess Plateau. In central Siberia, loess deposition took place also, but five to seven thin, weakly developed paleosols are identified in both stages. OIS 3, in the Chinese Loess Plateau near Yangchang, consists of a loess bed that is flanked by two weakly developed paleosols. At Kurtak, Siberia, OIS 3 is represented by two distinct, stacked paleosols with no loess bed separating the paleosols. In the Russian Plain, OIS 3 consists of a single, possibly welded paleosol, representing upper and lower stage-3 climates. Brunisols and Chernozems dominate the profiles in China and Siberia, whereas Regosols, Luvisols, and Chernozems are evident in the northern and southern Russian Plain, respectively. OIS 5 is represented in China and the Russian Plain by pedo complexes in a series of welded soils, whereas in contrast, the Kurtak site consists of six paleosols with interbedded loess. The paleosols consist largely of Brunisols and Chernozems. Although the three areas examined have different climates, geographical settings, and loess source areas, they all had similar climate changes during the last interglacial-glacial cycle.