|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 龙木错—双湖—澜沧江缝合带中段双湖地区地球物理特征显示文摘龙木错—双湖—澜沧江板块缝合带位于青藏高原羌塘中部至藏东一带,相关研究将其厘定为冈瓦纳板块的北界,对探讨青藏高原早期形成与演化历史及区域资源勘查与评价有重要的地质意义.本文结合区域重磁数据、大地电磁数据对该缝合带地球物理特征进行分析论证.首先基于WGM2012全球重力场模型网格化数据,利用垂向一阶导数计算、构造增强滤波等处理方法,推测龙木错—双湖—澜沧江缝合带异常的空间分布.计算的区域莫霍面在缝合带南北两侧深度存在较大差异.重力数据及其处理结果论证了龙木错—双湖—澜沧江缝合带存在的可能性.其次,选取了龙木错—双湖—澜沧江缝合带中段双湖地区的高质量大地电磁数据进行反演解释,电阻率反演结果表明缝合带南北存在较大的电性差异,结合区域地质情况,推测缝合带是不同地质体的分界线.最后,对缝合带地球物理响应特征和地质认识进行了讨论.通过对地球物理数据分析处理,为进一步讨论缝合带形成提供了有利的科学依据. | 曾昭发 赵雪宇 李忠雄 李静 王坤 马龙 | 2016 | 地球物理学报2016，59，12： | 6 |
| 2 | Fine relocation, mechanism, and tectonic indications of middle-small earthquakes in the Central Tibetan Plateau显示文摘The medium-small earthquakes that occurred in the middle part of Tibetan Plateau(32°N–36°N, 90°E–93°E) from August 2016 to June 2017 were relocated using the absolute earthquake location method Hypo2000. Compared to the reports of Chinese Seismological Networks, our relocation results are more clustered on the whole, the horizontal location differences exceed 10 km, and the focal depths are concentrated in 0–8 km, which indicates that the upper crust inside the Tibetan Plateau is tectonically active. In June2017 altogether eight earthquakes above magnitude 3.0 took place; their relocated epicenters are concentrated around Gêladaindong.The relocation results of M<3.0 small earthquakes also showed obvious differences. Therefore, we used the CAP method to invert for the focal mechanisms of the M ≥3.0 earthquakes; results generally tally with the surface geological structures, indicating that the Tibetan Plateau is still under the strong compressional force from the India Plate. Among them the eight earthquakes that occurred near Gêladaindong in June 2017 are all of normal fault type or with some strike-slip at the same time; based on previous research results we conjecture that these events are intense shallow crust responses to deep crust-mantle activities. | YuLan Li BaoShan Wang RiZheng He HongWei Zheng JiangYong Yan Yao Li | 2018 | Earth and Planetary Physics2018，2，5： | 4 |
| 3 | Research achievements of the Qinghai-Tibet Plateau based on 60 years of aeromagnetic surveys显示文摘The Qinghai-Tibet Plateau(also referred to as the Plateau)has long received much attention from the community of geoscience due to its unique geographical location and rich mineral resources.This paper reviews the aeromagnetic surveys in the Plateau in the past 60 years and summarizes relevant research achievements,which mainly include the followings.(1)The boundaries between the Plateau and its surrounding regions have been clarified.In detail,its western boundary is restricted by West Kunlun-Altyn Tagh arc-shaped magnetic anomaly zone forming due to the arc-shaped connection of the Altyn Tagh and Kangxiwa faults and its eastern boundary consists of the boundaries among different magnetic fields along the Longnan(Wudu)-Kangding Fault.Meanwhile,the fault on the northern margin of the Northern Qilian Mountains serves as its northern boundary.(2)The Plateau is mainly composed of four orogens that were stitched together,namely East Kunlun-Qilian,Hoh-Xil-Songpan,Chamdo-Southwestern Sanjiang(Nujiang,Lancang,and Jinsha rivers in southeastern China),and Gangdese-Himalaya orogens.(3)The basement of the Plateau is dominated by weakly magnetic Proterozoic metamorphic rocks and lacks strongly magnetic Archean crystalline basement of stable continents such as the Tarim and Sichuan blocks.Therefore,it exhibits the characteristics of unstable orogenic basement.(4)The Yarlung-Zangbo suture zone forming due to continent-continent collisions since the Cenozoic shows double aeromagnetic anomaly zones.Therefore,it can be inferred that the Yarlung-Zangbo suture zone formed from the Indian Plate subducting towards and colliding with the Eurasian Plate twice.(5)A huge negative aeromagnetic anomaly in nearly SN trending has been discovered in the middle part of the Plateau,indicating a giant deep thermal-tectonic zone.(6)A dual-layer magnetic structure has been revealed in the Plateau.It consists of shallow magnetic anomaly zones in nearly EW and NW trending and deep magnetic anomaly zones in nearly SN trending.They overlap vertically and cross horizontally,showing the flyover-type geological structure of the Plateau.(7)A group of NW-trending faults occur in eastern Tibet,which is intersected rather than connected by the nearly EW trending that develop in middle-west Tibet.(8)As for the central uplift zone that occurs through the Qiangtang Basin,its metamorphic basement tends to gradually descend from west to east,showing the form of steps.The Qiangtang Basin is divided into the northern and southern part by the central uplift zone in it.The basement in the Qiangtang Basin is deep in the north and west and shallow in the south and west.The basement in the northern Qiangtang Basin is deep and relatively stable and thus is more favorable for the generation and preservation of oil and gas.Up to now,19 favorable tectonic regions of oil and gas have been determined in the Qiangtang Basin.(9)A total of 21 prospecting areas of mineral resources have been delineated and thousands of ore-bearing(or mineralization)anomalies have been discovered.Additionally,the formation and uplift mechanism of the Plateau are briefly discussed in this paper. | Sheng-qing Xiong | 2021 | China Geology2021，4，1： | 2 |
| 4 | 新疆2014年于田M_S7.3及2015年皮山M_S6.5地震及其余震序列与潮汐应力的触发关系研究显示文摘选取新疆西昆仑地区的2014年于田M_S7.3和2015年皮山M_S6.5地震及其余震序列为研究对象,对地震目录的完备性进行了分析,并计算了主震发震时刻,主震震源断层面上的潮汐剪应力、正应力,得到主震震源断层面上的潮汐库仑破裂应力;再使用Schuster统计检验方法,分析了2个余震序列的潮汐相位角分布,研究新疆西昆仑地区中强地震及其余震活动与潮汐应力之间的触发关系。结果表明:主震发生时,皮山震源断层面上的潮汐库仑破裂应力为正值,而于田震源断层面上的潮汐库仑破裂应力为负值,说明潮汐应力对皮山主震有明显的触发作用,对于田主震的触发作用不明显。同时,计算结果表明2个余震序列与潮汐应力的统计相关参数P值几乎都小于5%,说明潮汐应力对皮山和于田余震序列均有触发作用。最后ETAS模型计算结果也表明了余震序列对地震震级的弱依赖性,可能与外界触发因素(潮汐)有关。 | 马青波 解朝娣 向元 王琼 杨思梦 王英楠 | 2018 | 地震研究2018，41，1： | 1 |
| 5 | 藏北高原钾质火山岩区的均衡重力异常与密度结构显示文摘利用青藏高原布格重力异常数据,通过均衡改正和二维密度结构拟合反演,获得了藏北钾质火山岩区下的区域剩余均衡重力异常特征以及二维密度结构特征。结果显示,藏北火山岩区下的地壳上地幔整体上处于密度亏损状态。结合已有的区域地质、构造和岩浆岩地球化学资料,地球物理资料,综合分析了藏北火山岩成因,即在印度板块持续北向俯冲作用下,使得亚洲岩石圈前缘发生断离,进而在新近纪藏北高原广泛地发生了钾质和高钾质的藏北火山喷发,同时也造成了藏北高原的快速隆升。 | 刘国成 秦尊丽 贺日政 吴燕冈 | 2013 | 地震地质2013，35，4： | 1 |
| 6 | 青藏高原中部中小地震的精定位、震源机制及构造背景分析显示文摘利用绝对地震定位方法(Hpyo2000)对青藏高原中部地区(32°N~36°N,90°E~93°E)于2016年6月至2017年6月期间发生的中小地震进行了重定位。与中国地震台网测定结果相比,定位后结果整体上更加聚集,水平位差距超过10km,深度上集中在0~8km范围内,这表明青藏高原内部上地壳构造活跃。2017年6月共发生8次3.0级以上地震,定位后的震中位置集中分布在格拉丹东附近。定位前后M<3.0的小地震的结果也显示明显的差异。为此,我们采用CAP(Cut and Paste)方法反演了M≥3.0地震的震源机制,结果显示其与地表构造性质较为吻合,青藏高原内部仍受到印度板块强烈的挤压作用。其中2017年6月格拉丹东附近发生的8次地震均为正断或走滑兼正断型,根据前人研究结果,猜测这是壳幔活动剧烈的地表响应。 | Y.L.Li B.S.Wang R.Z.He H.W.Zheng J.Y.Yan Y.Li 李娱兰(译) 郑洪伟(校) 贺日政(校) | 2019 | 世界地震译丛2019，50，3： | 0 |
| 7 | 西藏地区营区营房抗震现状与对策研究显示文摘西藏地区地质活动频繁,地震灾害频发,给当地居民和驻军造成巨大损失。营区营房作为部队战备、训练的重要场所,如何采取有效措施,减少地震灾害影响,对确保部队战斗力生成具有重要作用。本文在分析西藏地区地震分布与特征的基础上,结合当前该地区部队营区营房抗震现状中存在的实际问题,提出相应的对策措施,旨在为提升西藏部队营区营房抗震减灾工作提供参考建议。 | 郭勐 吕楠 梅岩 | 2013 | 中国储运2013，，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员