"5.10"强对流天气雷达产品特征及临近预报

本文运用多普勒雷达的基本反射率(R)、基本径向速度(V)、垂直积分液态含水量(VIL)等产品对2005年5月10日邯郸发生的强对流天气进行分析,总结了雷达产品特征,得出了一些具有实用价值的结果,为预报员快速判断强对流的潜势提供参考.     

“5．10”强对流天气雷达产品特征及临近预报

本文运用多普勒雷达的基本反射率（R）、基本径向速度（V）、垂直积分液态含水量（VIL）等产品对2005年5月10日邯郸发生的强对流天气进行分析，总结了雷达产品特征，得出了一些具有实用价值的结果，为预报员快速判断强对流的潜势提供参考。     

Geoarchaeological evidence for multidecadal natural climatic variability and ancient Peruvian fisheries

Understanding the influence of natural climatic variability on modern fisheries is complicated by over a century of industrial fishing. Archaeological data provide unique opportunities for assessing precolonial and preindustrial fisheries. Records show that anchoveta-vs sardine-dominated fisheries correlate with 20th-century climate change in the Pacific Basin and are linked to multidecadal climatic variability. The “anchovy regime” is characterized by cooler conditions and lower frequency El Niño/Southern Oscillation (ENSO) events, while the “sardine regime” is associated with warmer conditions and higher frequency ENSO. Fish remains excavated at Lo Demás, an Inca-period (ca. A.D. 1480–1540) fishing site at 13°25′S on the Peruvian coast, document a shift from an anchoveta-to a sardine-dominated fishery at about A.D. 1500. This shift correlates with records for increasing ENSO frequency at the same time. Middle and late Holocene sites have archaeofish assemblages that also suggest regime changes. Here we show that changes in fish regimes can result from natural variability and we support the potential role of archaeological assemblages in tracking multidecadal climate change in the Pacific Basin throughout the Holocene (0–11,500 cal yr B.P.).     

Late Cenozoic Stratigraphic Sequence and Its Implication to Tectonic Evolution, Hejiakouzi Area, Ningxia Hui Autonomous Region

ＩＮＴＲＯＤＵＣＴＩＯＮＨａｉｙｕａｎ Ｔｏｎｇｘｉｎｓｙｎｔａｘｉｓ ,ｗｈｉｃｈｌｉｅｓｏｎｔｈｅｎｏｒｔｈｅａｓｔｅｒｎｅｄｇｅｏｆｔｈｅＱｉｎｇｈａｉ ＸｉｚａｎｇＰｌａｔｅａｕ ,ｗａｓｆｏｒｍｅｄａｎｄｓｅｖｅｒｅｌｙｄｅｆｏｒｍｅｄａｓｆｏｒｅｌａｎｄｂａｓｉｎｄｕｅｔｏｔｈｅｒｉｓｅｏｆｔｈｅＱｉｎｇｈａｉ ＸｉｚａｎｇＰｌａｔｅａｕｓｉｎｃｅｔｈｅＣｅｎｏｚｏｉｃ .Ｉｎｔｈｅａｒｃ ｌｉｋｅｒｅｇｉｏｎ ,Ｃｅｎｏｚｏｉｃｄｅｐｏｓｉｔｓａｒｅｗｉｄｅｌｙｄｉｓｔｒｉｂｕｔｅｄａｎｄｐｅ…     

灵武断裂晚第四纪古地震及其破裂特征

在地质地貌调查基础上 ,对灵武断裂进行了古地震槽探揭露。结果显示 ,距今 2 8ka以来 ,灵武断裂上发生过 5期地表破裂型地震事件 ,时间大约分别在距今 ( 2 7 15± 0 778) ,2 0 0 ,( 13 0 7± 0 0 6) ,( 10 586± 0 0 5)和 6 0ka。根据 5期古地震事件的综合对比分析 ,发现断裂有分段组合破裂的特征 ,由此并结合槽探揭示的古地震同震位移等估计了古地震的震级     

白垩-第三纪界线样品异常铱的赋存状态及其地质意义

 通过对地质样品中铱的赋存状态研究及对残渣相中微粒的透射电镜分析,得出:在K-T界线样品中铱主要存在于残渣相中,不利于地球化学过程富集铱;铱在残渣相的富集与有机不溶物的存在没有必然联系;白垩-第三纪的生物绝灭事件中有火山活动参与;K-T界线事件的触发物为地外物质撞击。最后提出了K-T界线样品异常铱来源于地外物质撞击和火山喷发的混合模型。     

吉林东部花岗岩风化的地球化学

描述了吉林东部花岗岩风化壳的特征。研究了花岗岩风化过程中主要造岩矿物的变化特点;建立了主要造岩矿物的风化序列。研究了主量元素、微量元素及稀土元素的地球化学行为;探讨了影响风化过程中元素行为的主要因素。计算了风化速率。     

澜沧—耿马地震的地表破裂特征

本文通过对澜沦—耿马地震所形成的地震形变带中地震断层和构造地裂缝的追索、调查和实测,分析了澜沧—耿马地震地面破坏的组合类型及其与构造线的展有关系,对形成澜沧—耿马地震的应力场及控震、发震构造进行了初步研究。     

Ordovician-Silurian Boundary Extinction and Its Relationship to Iridium and carbon Isotope Anomalies

The abundance distributions of more than 40 elements in the No. 502 Ordovician-Silurian (O/S) bounda-ry section at Fenxiang, Yichang have been studied by RNAA and INAA. The results show that in the bounda-ry bed, there is a distinctive Ir anomaly because the Ir concentration abruptly increases to 0.64 ppb.Furthermore, the Ir is positively correlated in abundance variation with some siderophile and sulphophile ele-ments. In the same bed of the O/S boundary section at Huanghuachang, Yichang, there is also a δ~(13)C excur-sion. These geochemical signs support the hypothesis that the terminal Ordovician mass extinction was proba-bly related to extraterrestrial event, and provide new evidence for defining the O/S boundary between theHirnantia-Kinnella and G. persculptus Zones.     

含油砂岩温升过程的声学特性

一、概述目前,在石油开采中,对于粘稠度较高的储油层,用常规的方法难以开采,一般采用注热法(向油层注入高压蒸汽或热水)驱油进行开采。但为了减少不必要的能源消耗,用注热法开采时,必须掌握注热后热液在地层深部的渗流情况,以便了解“热区”的时空变化规律,实现对稠油层开采的控制。根据国外有关资料介绍,含油砂岩的声波速度随温度的升高而降