初至折射波静校正技术在复杂探区地震数据处理中的应用

山区及黄土塬地区近地表结构复杂，地形起伏大、低降速带横向变化剧烈，地震资料处理中的静校正难度加大。长波长静校正容易引起构造形态畸变，短波长静校正影响地震剖面信噪比。针对此类问题，从长波长静校正问题及短波长地表非一致性问题分析入手，提出部分炮检距叠加识别长波长静校正技术及分段统计逼近地表非一致性校正技术。该技术在复杂地表区与其它相关技术综合应用，可有效解决长、短波长静校正问题。     

广东省应大力发展海洋牧场

综述了我国及广东省十多年来鱼虾种苗人工放流及人工鱼礁的投放情况，结合广东省广大海区的水温、盐度、ｐＨ值、海流、营养盐含量情况及天然饵料的种类、分布等，提出了除在大亚湾已设置了水产增殖站以外，还应该在广东东部的南澳和西部的湛江各设一个增殖站，会收到更大的效果。人工鱼礁应总结过去投放的经验，加强礁区管理，逐步解决投资与收益的关系问题，并进一步扩大投放人工鱼礁的地点和密度，把广东海区切实建成理想的海洋牧场。     

Concealed porphyry delineation based on nonlinear three-dimensional density-difference inversion: An example in the Beiya mine area,Western Yunnan,China

Intermediate acid-complex rock masses with low-density characteristics are the most important prospecting sign in the Beiya area, of western Yunnan province, and provide a physical basis for good gravity exploration. It is usually difficult to obtaining solutions in connection with actual geological situations due to the ambiguity of the conventional gravity-processing results and lack of deep constraints. Thus, the three-dimensional (3D) inversion technology is considered as the main channel for reducing the number of solutions and improving the vertical resolution at the current stage. The current study starts from a model test and performs nonlinear 3D density-difference inversion called “model likelihood exploration”, which performs 3D inversion imaging and inversion of the known model while considering the topographic effects. The inversion results are highly consistent with those of the known models. Simultaneously, we consider the Beiya gold mine in Yunnan as an example. The nonlinear 3D density-difference inversion technology, which is restricted by geological information, is explored to obtain the 3D density body structure below 5 km in the mine area, and the 3D structure of the deep and concealed rock masses are obtained using the density constraints of the intermediate-acid-complex rock masses. The results are well consistent with the surface geological masses and drilling-controlled deep geological masses. The model test and examples both show that the 3D density-difference nonlinear inversion technology can reduce inversion ambiguity, improve resolution, optimize the inversion results, and realize “transparency” in deeply concealed rock masses in ore-concentrated areas,which is useful in guiding the deep ore prospecting.     

环境同位素法在西北地区地下水资源评价中的应用

应用环境同位素方法测定了不同类型地下水的年龄，识别了西北干旱、半干旱地区地下水的补给源，进行了补给量的计算，建立了地下水流系统，并取得了新的成果。     

Upper Holocene sea-level changes: Paleogeographic evolution and its impact on coastal archaeological sites and monuments

The paper presents the evolution of the geographic environment imposed by sea-level changes in selected sites of the Aegean Sea region during the Upper Holocene. The changes are due, mainly, to paroxysmic phases of the actual neotectonic evolution and to differential—in time and space—block movements, and emerged or submerged coasts. The reconstitution of these coasts is presented and, in some cases, natural harbor morphology is revealed. The use and evolution of these sites is discussed. Other sites concern coastal or inland ancient settlements or constructions affected by submersion by the sea, by the rise of the groundwater table, or by uplift movements. A general discussion on engineering measures to be applied for protection of the antiquities affected by these geographic changes closes the presentation.     

辽宁及其邻区1900—1949年M≥5级地震参数研究

我们搜集了国际国内地震台网资料、宏观考察资料、地震专题研究报告,对1900—1949年5级以上地震全部进行了核查,重新进行定位处理,并结合宏观考察资料和前人工作成果进行分析研究,得到较为准确的震中位置。通过这项研究,增补了原目录中遗漏的地震,并对目录中的错误进行了修正,从而得到一份较为完整可靠的地震目录。     

干旱区内陆河流域水文与水资源问题

阐述了我国水文水资源研究的发展阶段,面临的主要问题,以及当前研究中的热点问题。以新疆地区为例,对干旱区内陆河流域的水文水资源研究方向作了初步探讨。     

基于MODIS的浙闽近海表层悬浮体时空变化特征分析

基于2015年中分辨率成像光谱仪（MODIS）卫星影像资料,结合实测悬浮体浓度数据及海表温度、风场、海表流场等资料,对浙闽近海表层悬浮体时空分布及控制因素进行了探讨。结果表明,浙闽近海表层悬浮体分布存在显著的季节性变化特征。研究区2～50 m等深线海域存在温度锋面,在一定程度上抑制了表层悬浮体向外海的输运。夏季的河流输沙有利于研究区北部近岸高浓度悬浮体分布,南风、西南风对表层悬浮体扩散起抑制作用;冬季在强烈东北季风作用下,再悬浮作用强烈,同时为表层悬浮体向南扩散提供了动力。本研究对完善东海内陆架泥质区沉积物输送机制具有一定的辅助作用。     

Conservation planning, boundary-making and border terrains: The desire for forest and order in the Gran Sabana, Venezuela

Conflicts surrounding protected area management often emerge from contested processes of boundary-making. Such productions of bounded conservation spaces are contingent in part on processes of identity formation, where some social groups are legitimized as belonging to conservation units, while others are constructed as out-of-place. This article draws on the literature in postmodern geopolitics and the political ecology of fire to interrogate processes of boundary-making and identity formation in the savanna landscape of Canaima National Park, Venezuela. The institutional culture of the environmental management agency EDELCA is in part premised on narratives of history and indigeneity coupled with a desire for an imagined, forested landscape. Because of the social constructions shaping this institutional culture, the agency maintains an approach to fire management that emphasizes fire suppression. However, an ecological field study suggests that fire suppression is leading to increased fuel loads, especially in ecologically significant boundaries between grasslands and forest. Although these boundary zones are the focus of indigenous practices of prescribed burning, they fall in-between the state management categories of forest and ecotone. As a result, these interstitial spaces become theaters for performances of domination and resistance, leading to contradictory and inconsistent approaches to fire management that place gallery forests at risk.     

喜马拉雅东构造结周边地区地壳磁异常分布特征研究

根据波茨坦地磁场模型(POMME6.2),研究喜马拉雅东构造结周围地区地壳磁异常的空间分布、磁异常随高度的衰减特征.利用二维小波变换方法对地表磁异常进行分解,分析小波细节组合和逼近信号的异常特点.讨论磁异常与地质构造的联系.结果表明,研究区内地壳磁异常分布相当不均匀.喜马拉雅—东构造结—龙门山—大巴山地区分布着较强的负磁异常;四川盆地为正磁异常,其他地区磁异常较弱.东构造结对周围地区磁异常有重要影响,它及其周围地区的地壳磁异常都是在负磁或弱磁异常背景上,叠加着中短波长的正负磁异常.这些中小尺度磁异常由中、上层地壳磁性物质产生,走向与地质构造基本一致.沿金沙江、红河断裂带分布着清晰的弱磁异常带.龙门山断裂带、丽江—小金河断裂带和红河断裂带是磁异常强弱过渡带.青蒇高原中部东西向的磁异常,在东构造结弧顶地区呈弧形分布.青藏高原中部和滇中地块带状、团状磁异常具有相同的衰减规律.