基于孔裂隙理论的岩石物理实验研究与理论应用     

陈剑铭  涂运中  张波  尹浩  王晓赛  王文  赵明  吴纪修  高鹏举  田倩媛  徐梦龙  黄威  张家声 《地质论评》2024,70(S1):151-153

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2019年4—10月我国主要暴雨天气过程简述     

闵爱荣  廖移山  邓雯  张翠荣 《湖北气象》2020,39(5):539-548

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Two mid-Holocene millennia of swamp forest in the Rhine/Meuse deltaic plain     

JAN D. VAN DER WOUDE 《Boreas: An International Journal of Quaternary Research》1985,14(4):267-272

The paleoenvironmental evolution of a Dutch deltaic swamp forest area during the mid-Holocene was strongly governed by a general rise of water level (bound to postglacial sea-level rise) and by fluctuations in this water-level rise. A phasing of this 2,000 years period shows alternation of closed swamp forest on the one hand, and (fluvio-) lacustrine environment with swamp forest islands on the other. The refined scale of investigation permits bird's-view landscape reconstructions. These also show how attractive the area was for neolithic fishermen.  相似文献   

A modulation of the atmospheric annual cycle in the Southern Hemisphere     

JAMES W. HURRELL  HARRY VAN LOON 《地球，A辑:动力气象学与海洋学》1994,46(3):325-338

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Impact‐induced frictional melting in ordinary chondrites: A mechanism for deformation,darkening, and vein formation     

C. H. VAN DER BOGERT  P. H. SCHULTZ  J. G. SPRAY 《Meteoritics & planetary science》2003,38(10):1521-1531

Abstract— High speed friction experiments have been performed on the ordinary chondrites El Hammami (H5, S2) and Sahara 97001 (L6, S3) using an axial friction‐welding apparatus. Each sample was subjected to a strain rate of 10³ to 10⁴ s^?1, which generated 250 to 500 μm‐deep darkened zones on each sample cube. Thin section analyses reveal that the darkened areas are composed of silicate glass and mineral fragments intermingled with dispersed submicron‐size FeNi and FeS blebs. Fracturing of mineral grains and the formation of tiny metallic veins define the extent of deformation beyond the darkened shear zone. These features are not present in the original meteorites. The shear zones and tiny veins are quite similar to certain vein systems seen in naturally deformed ordinary chondrites. The experiments show that shock deformation is not required for the formation of melt veins and darkening in ordinary chondrites. Therefore, the presence of melt veins and darkening does not imply that an ordinary chondrite has undergone severe shock deformation. In fact, high strain rate deformation and frictional melting are especially important for the formation of veins at low shock pressures.  相似文献   

Time-mean precipitation and vertical motion patterns over the United States     

H. M. VAN DEN DOOL 《地球，A辑:动力气象学与海洋学》1990,42(1):51-64

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Definition and character of the Regency Interglacial and Early-Middle Pleistocene stratigraphy in the King Valley, western Tasmania, Australia     

SEAN J. FITZSIMONS  ERIC A. COLHOUN  GUUS VAN DE GEER  ROBERT S. HILL 《Boreas: An International Journal of Quaternary Research》1990,19(1):1-15

Interpretation of weathered glacial and interglacial deposits in the lower King Valley suggests that the Early Pleistocene Thureau Formation is conformably overlain by the Regency Formation. Pollen analysis of the Regency Formation provides evidence of a new climatic stage, the Regency Interglacial. The interglacial deposit consists of humified peat overlain by drifted wood and leaves. The pollen analysis shows a transition from montane scrub rainforest to lowland temperate rainforest dominated by Lagarostrobos franklinii, Nothofagus cunninghamii and Phyllocladus aspleniifolius. Trace quantities of the species Quintinia psi-latispora and Gothanipollis perplexus , now both extinct in Tasmania, were also recorded. On the basis of intense chemical weathering and correlation with sediments that have a reversed magnetization the weathered glacial deposits of the Thureau Formation are thought to be older than 730,000 B.P. The eroded interglacial deposit rests on the weathered deposits and is buried by outwash gravels of the David Formation, which was deposited during an ice advance of the Middle Pleistocene Henty Glaciation (c. 150,000 B.P.). Comparison of the Regency site with a site 2 km to the south at Baxter Rivulet shows that the unconformity between the interglacial deposit and the overlying outwash gravel represents the erosion of the evidence for the Middle Pleistocene Moore Glaciation.  相似文献   

The metamorphic evolution and tectonic significance of the eclogite in the Sumdo Complex, Tibet, China     

ZHANG Cong  Thomas BADER  Herman VAN ROERMUND  YANG Jingsui 《《地质学报》英文版》2018,92(Z2):45-45

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繁昌盆地张家冲铅锌矿地质特征及成矿规律     

洪东良  段留安  赵磊  邓江洪  陈四新 《安徽地质》2014,(2):103-107,118

长江中下游成矿带铜陵矿集区,长期以来为国内外研究的热点地区之一,但大都集中于研究Cu、Au、S、Fe等矿产,而铅锌矿的相关报道或科研工作相对较少。铜陵张家冲铅锌矿位于长江中下游成矿带繁昌盆地内,属次火山口控制的铅锌矿,是繁昌火山岩盆地内发现的第一个有色金属矿床,同时也是通过对盆地内硅化带的系统解剖发现的矿床,有着较高的科研和生产价值。笔者近年来组织了对该区的施工,提交(332+333)铅锌矿石资源量675.87×104t,Pb+Zn金属量11.90×104t。本文旨在通过对该区铅锌矿地质特征、矿床成因、找矿标志及成矿规律等进行总结,进一步丰富该地区成矿模式和理论,为本区乃至整个繁昌盆地下步找矿提供参考和借鉴。  相似文献   

Technology transfer in the Clean Development Mechanism     

HELEEN DE CONINCK  FRAUKE HAAKE  NICO VAN DER LINDEN 《Climate Policy》2013,13(5):444-456

Technology transfer is often mentioned as an ancillary benefit of the Kyoto Protocol's Clean Development Mechanism (CDM), but this claim has hardly been researched or substantiated. The question of technology transfer is important, both for developing countries in need for new technology and knowledge and for industrialized countries, as it provides export potential for climate-friendly technologies. To determine what technology transfer means, whether it is occurring through the CDM, and what the value of the associated capital flows is, this article examines technology transfer in the 63 CDM projects that were registered up until 1 January 2006. Technology hardware originates from outside the host country in almost 50% of the evaluated projects, particularly in non-CO₂ greenhouse gas projects, wind energy projects, and a substantial share of the hydropower projects. Bioenergy and projects in the agricultural sector mainly use local technology. The investment value associated with the CDM projects that transferred technology is estimated to be around €470 million, with about €390 million coming from the EU. As the non-CO₂ greenhouse gas projects had very low capital costs, the investment value was highest in the more capital-intensive wind energy and hydropower projects. We also found substantial soft technology transfer, but uncertainties for this finding are greater.  相似文献