新疆西南天山金矿床主要类型、特征及成矿作用

文章在总结前人研究成果的基础上,综合论述了西南天山金矿的成矿地质背景、金矿床的时空分布和基本特征。根据矿床地质特征和控矿因素,将西南天山的金矿划分为与剪切带有关的金矿床、与侵入岩有关的金矿床(包括斑岩型)、石英-重晶石脉型金矿床、与火山岩有关的金矿床和矽卡岩型金矿床5类,其中与剪切带有关的金矿床是最重要的矿床类型。探讨了西南天山金矿的成矿时代、成矿物质和成矿流体来源,以及成矿地球动力学机制。提出与剪切带有关的金矿床成矿物质主要来源于岩浆和海相碳酸盐岩,成矿流体主要来源于岩浆水或主要来自大气降水,混合少量岩浆水。石英-重晶石脉型金矿床成矿物质来自容矿地层,成矿流体主要来源于沉积建造水。与剪切带有关的金矿、与侵入岩有关的金矿、石英重晶石脉型金矿和矽卡岩型金矿成矿时代主要集中在二叠纪—三叠纪,形成于后碰撞构造演化阶段。斑岩型和浅成低温热液型金矿床形成于岛弧挤压环境。     

天山地区GPS连续站高程时间序列分析

利用UNAVCO提供的天山地区境内外GPS连续站的观测数据,处理得到各站高程时间序列。进行最小二乘线性拟合,提取速度场,并消除原始序列的线性趋势。然后对时间序列进行谱分析以及小波多分辨率分析。可以看出,天山地区在过去10余年间呈现整体隆升趋势,各个观测站之间抬升的一致性较好,并且各站都表现出明显的季节性变化。     

精密水准与GNSS垂向形变关系研究——以天山构造带为例

以天山构造带区域为例,分别用精密水准和GNSS给出地壳形变垂直运动速率矢量图,对其差异及差异形成的原因进行深入分析和探讨,并基于优势互补原则,给出二者融合的形变图像.根据多年研究经验认为,该方法得到的垂直形变图在强震中长期预测中具有较为重要的应用价值.     

伊犁石炭纪裂谷的时空演化特征

通过对伊犁盆地石炭纪裂谷火山岩的地层学、岩石学、岩石地球化学等方面的论述,分析了裂谷的形成与演化,探讨了裂谷形成的区域动力学背景。认为裂谷期火山活动具幕式喷发的特点;随着时代的演替,裂谷由初始裂陷的察布查尔－伊什基里克一带扩展到整个伊犁地块;裂谷的形成主要与中天山南北两侧古洋壳的相向俯冲所导致的地幔物质上涌、中上地壳的背向伸展有关。     

新疆巩乃斯：为何被誉为天山深处的人间秘境？

1773年夏天,满清官员带领一个叫做希拉登的英国人来到天山地区。希拉登是著名的地理学家和探险家,乾隆皇帝特批他前往天山,帮助土尔扈特东归者勘测地形,建设新的家园。     

亮剑天山——河南煤田物测队新疆涝坝湾三维地震勘探项目施工侧记

“435炮!新的山区纪录在天山诞生了!”2008年10月16丑晚10时,伴随着最后一炮的声响,河南煤田物测队地震二院圆满完成新疆涝坝湾三维地震勘探项目野外数据采集任务。翌日凌晨,天下起了大雪。“这一仗打得真漂亮!”“如果耽误一天就大雪封山了……”望着皑皑雪山,同志们的对话中充满了胜利的喜悦。     

Utilisation and Management Changes in South Kyrgyzstan＇s Mountain Forests

Using political ecology as its conceptual framework, this paper focuses on the changes in forest utilisation and management of South Kyrgyzstan＇s walnut-fruit forests over the last century The aim of this study on human-environment interactions is to investigate the relationship between actors on the one side, their interests and demands, and the forests and forested lands on the other. Forest resource utilisation and management - and even the recognition of different forest products as resources - are connected with political and socioeconomic conditions that change with time. The walnut-fruit forests of South Kyrgyzstan are unique, characterised by high biodiversity and a multiplicity of usable products; and they have been utilised for a long time. Centralised and formal management of the forests started with the Russian occupation and was strengthened under Soviet rule, when the region became a part of the USSR. During this era, a state forest administration that was structured from Moscow all the way down to the local level drew up detailed plans and developed procedures for utilising the different forest products. Since the collapse of the Soviet Union, the socio-political and economic frame conditions have changed significantly, which has brought not only the sweeping changes in the managing institutions, but also the access rights and interests in the forest resources. At present, the region is suffering from a high unemployment rate, which has resulted in the forests＇ gaining considerable importance in the livelihood strategies of the local population. Political and economic liberalization, increased communication and transregional exchange relations have opened the door for international companies and agents interested in the valuable forest products. Today, walnut wood and burls, walnuts, wild apples and mushrooms are all exported to various countries in the world. Scientists and members of various international organisations stress the ecological value of the forests and are trying to establish nature conservation areas. Nevertheless, it is to fear that a multiplicity of interrelated factors - the present transformation and globalization processes, the appearance of new actors, the local population＇s insecure economic situation and the erosion of managing institutions - are all leading to an intensified and unregulated exploitation of the forests, resulting in their degradation.     

康古尔塔格缝合带的变形机制

北天山东段康古尔塔格带是晚古生代塔里木板块和准噶尔板块碰撞的结果。它是一条复杂的、强烈的高应变带．并具有独特的变形机制、应变序列以及构造变形。本文运用构造－地层研究方法对该碰撞带的构造特征加以分析和研究。     

新疆西南天山地区水系沉积物测量地球化学特征及找矿方向

新疆西南天山地区隶属于塔里木板块北缘,该区是我国重要的铜、铅、锌、镍等成矿带。为查明区内主要成矿元素地球化学分布和浓集特征、确定找矿靶区,对西南天山一带进行1∶5万水系沉积物地球化学测量。通过采集分析8347件化学样品的17种元素,结合研究区成矿地质条件共圈定出33处异常。并对HS26、HS18综合异常进行了异常查证,新发现了3处铜、铅锌多金属矿化点。圈定了3处找矿远景区,即阿克塔什Pb、Zn、Cu找矿远景找矿远景区、苏约克Ni、Co、Cr找矿远景区和阿依浪苏阿舒别勒Ni、Co、Cr找矿远景区,为该区下一步找矿工作指明了方向。