阿拉善地块下插河西走廊的发现及其构造意义

通过天然地震层析成象技术,反演了河西走廊中部地区的三维速度结构.基于横断北祁连、民乐盆地、龙首山及阿拉善地块南缘的速度结构剖面分析发现,在上地壳内,阿拉善地块以低速体"铲状"形式插入河西走廊之下.围绕这一深部地质结构现象、成因及相关依据进行了简单的辨析、论证.初步认为,龙首山既是逆冲断裂构造带或巨型推覆体,也是柴达木-祁连块体与阿拉善块体"碰撞造山"的结果,至少在河西走廊中部是青藏板块与华北板块的分界带.     

藏彝走廊“藏回”文化特征探析——以迪庆“藏回”为例

通过对云南迪庆藏回族群文化特征的描述与分析,展现了藏彝走廊丰富多彩的民族文化格局,同时对民族文化调适也进行了探讨,并剖析了其中的规律性。     

空间:藏彝走廊民族文化生态研究的新视角

从空间理论的角度看,藏彝走廊既是地理空间,更是社会空间。因而运用空间理论研究藏彝走廊民族文化生态空间的整体特征,有助于理解民族走廊在中华民族多元一体格局中的重要地位,对构建中国的民族走廊理论具有重要意义。     

约己以让,持之以恒——人类学学者访谈录之五十

通过对中国民族大调查工作,彝族、藏族、羌族、藏彝走廊等研究工作的回顾与反思,探讨了中国民族学体系的理论建构及学科应用诸问题,同时着重分析了藏彝走廊研究在民族学区域综合研究中的意义。     

河西走廊东部矿山环境地质问题及综合治理

甘肃河西走廊东部武威市矿产资源丰富,在大规模的采矿活动中,由于不合理开采或环保意识淡薄,使矿山地质环境遭到了严重破坏,经过调查研究结合实际对采空沉陷、崩塌、滑波、泥石流、土地破坏等矿山地质环境问题,提出一些治理措施与建议.     

基于网格技术的高速公路通道实时协同控制

针对大城市高速公路通道控制中城市高速公路子系统、并行街道子系统、匝道子系统的控制策略独立制定产生的不协调状况,以高速公路通道整体为研究对象,建立高速公路通道多控制措施多子系统协同控制的分层递阶控制体系;针对高速公路通道协同控制模型求解耗时长,通道交通流实时控制无法真正实现的难题,构建高速公路通道网格体系,并对关键中间件模型设计分布式求解算法,利用网格高性能计算能力,实现通道控制问题的快速求解.     

河西走廊昌马灌区土壤水盐动态特征及脱盐规律

昌马灌区处于西北内陆典型的干旱区,由于自然环境差,蒸发作用强烈,平原区土壤含盐量较高.拟建的"疏勒河农业灌溉工程"实施区80.9%的开垦土地为盐渍土,盐渍土改良方式以及现状水盐平衡的变化对环境特别是下游溶泄区的影响引起了各界的关注.在分析土壤盐份动态影响因素基础上,根据昌马灌区水土盐动态观测资料,将土壤盐分动态分为6种类型.同时发现难溶盐CaCO 3的稳定带不在中游,而在下游安西-敦煌盆地和花海盆地,从而为土壤可溶盐含量计算和排盐设计找到了理论依据.通过对比典型原位淋滤试验,获得了洗盐效果与淋洗方式的关系,建立了试验中原盐剩余率与累计入田间淋洗水量的相关关系,为工程设计和政府决策提供了依据.     

Early tectonic uplift of the northern Tibetan Plateau

The Hexi Corridor is the northmost foreland basin of the Tibetan Plateau and its formation is controlled by the northern marginal fault of Tibet, Altyn Tagh Fault （ATF）-North Qilian Shan marginal Fault （NQF）, and the southern Kuantan Shan-Longshou Shan Fault （KLF）. So its study is important to understanding the mechanism of Tibet formation and its influence on global climate change. The oldest Cenozoic sediments in the Corridor is the Huoshaogou Formation which consists of terrigenous fine conglomerate, sandstone, sandy mudstone and mudstone, depositing in al- luvial to lacustrine and fan delta sedimentary environments. Detailed paleomagnetic measurements of this sequence at Yumen clearly reveal eleven pairs of normal and reversed polarities. Fossil mammals found around the section support that most of the observed polarities can be well correlated with chrons between 13n and 18r of the standard geomagnetic polarity time scale, yielding ages of 40.2-33.35 Ma. The mean declinations of this sequence and its immediately above stratigraphy indicate an 18.3° rapid clockwise rotation of the Hexi Corridor. Since this sequence has been strongly folded and is capped by an angular unconformity, we think that the presence of the thick alluvial fan conglomeration at the bottom of the foreland basin may indicate the initial deformation and uplift of the northern Qilian Shan. This process could occur at latest at 40.2 Ma, driven by the faults NQF and KLF that thrust onto the Hexi corridor respectively from its southern and northern margins. These faults are in an early response to the collision of India with Asia, while the unconformable termination and rotation of the Huoshaogou Formation at -33.35 Ma indicate other early episode of rapid tectonic deformation and uplift of the northern Tibet.     

关于认识藏彝走廊的三个角度与研究思路

提出了研究与认识藏彝走廊的三个角度及思路:人、地关系;从藏缅语分化演变角度认识藏彝走廊中藏缅语民族的共同起源与历史演变;从整体和多学科综合角度进行藏彝走廊研究。并就这三个角度在研究和认识藏彝走廊中的必要性及价值进行了探讨。