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Partly melted rocks under Earth’s surface offer insights into what makes plate tectonics possible(图)
地球表面 板块构造 构造地质学
2023/6/26
Lava lamp tectonics: Research suggests giant blobs of subducted sediment float up through deep Earth
lava lamp structure subduction sediment earthcrust
2021/8/6
Sand and mud subducted off the coast of California around 75 million years ago returned to the Earth's crust by rising up through the mantle as enormous diapirs, like blobs in a lava lamp, new researc...
造山带地貌是气候、构造及其相互作用等复杂过程的产物。其中,河流是造山带中发育最为广泛的地貌之一。河流侵蚀过程的控制因素随时间发生改变,但是它们是如何变化仍然不清楚。横跨青藏高原东南部、南部和喜马拉雅山的长江、湄公河、萨尔温河和雅鲁藏布江等大河水系呈现不寻常的几何形态和地貌特征,被认为是构造变形、水系重组以及气候变化的结果。因此,青藏高原和喜马拉雅山的河流是研究构造、气候、地表过程和水系重组之间复杂...
造山带的前沿科学问题之一是如何实现其向陆内的大规模水平生长。在造山过程中,前陆褶皱-逆冲带会以前展式、后展式或者混合式等形式扩展,形成包含双重逆冲构造和逆冲叠瓦扇等典型构造样式在内的薄皮或厚皮逆冲推覆构造。前陆盆地也会逐渐卷入变形,并发生向稳定克拉通方向的迁移。前陆褶皱-逆冲带的扩展配合前陆盆地的迁移,这样的前陆系统活动形成了造山带大规模的水平生长。
喜马拉雅山是地球上海拔最高的山脉、与青藏高原一起组成了世界第三极,促成了亚洲季风环流,使处于副热带高气压带的本应干旱贫瘠的我国东南沿海变成了湿润富饶的江南。喜马拉雅山的隆升过程一直是地球系统科学研究的国际前沿,那么如此宏伟的山脉究竟是何时、如何开始隆升的呢?
了解俯冲板片与上覆岩石圈的耦合关系是认识增生造山机制这一前沿科学问题的关键。前人曾提出3种可能的增生造山机制模型,包括大洋岩石圈平板俯冲、地体增生/碰撞和板块重组,但对于地体增生/碰撞的增生造山效应尚未得到很好的例证。新疆北部是中亚增生造山带及其成矿域的重要组成部分,近年来已在该地区厘定出一系列古生代岛弧带及若干弧-弧碰撞拼贴事件,然而关于碰撞拼贴的时限和过程普遍存在争议。解决该问题不仅对重建新疆...
新生代印度板块持续北向挤压,不仅造成青藏高原隆升,还在高原及其周边产生了巨大构造变形。青藏高原东北部地区,作为印度-欧亚碰撞的远程响应地区,是高原生长的最年轻地区。理解高原东北部新生代以来挤压应力演化,对认识高原东北部地区构造活动过程、解决当前高原隆升变形模式争议等具有重要科学意义。该地区现今的应力研究主要采用GPS观测等,而对于地质时期的古应力研究极少。磁组构作为一种灵敏的应力变化指示计,能够有...
张朋、梅廉夫*等 资源学院/构造与油气资源教育部重点实验室 Earth-Science Reviews(2019), Palaeodrainage evolution of the large rivers of East Asia, and Himalayan-Tibet tectonics
河流体系;区域构造;盆地发育;时效快;精度高;易追踪
2021/10/20
近日,地球科学国际权威期刊《Earth-Science Reviews》刊发中国地质大学资源学院和构造与油气资源教育部重点实验室梅廉夫教授团队,联合英国兰卡斯特大学Yani Najman教授等的研究成果。论文第一单位为构造与油气资源教育部重点实验室,第一作者为博士研究生张朋,梅廉夫教授与Yani Najman教授为共同通讯作者。
2018 International Symposium on Geodesy and Geodynamics—Tectonics,earthquake and Geohazards(ISGG 2018)
2018 International Symposium Geodesy and Geodynamics Tectonics,earthquake and Geohazards
2018/1/11
Many of the attendees of last year’s ISGG2016 conference found it to be deeply meaningful. At this conference, they shared recent developments in the field of geodesy and geodynamics around the confer...
Earth has some special features that set it apart from its close cousins in the solar system, including large oceans of liquid water and a rich atmosphere with just the right ingredients to support li...
South Scandinavian joints and Alpine/Atlantic-ridge tectonics
joints neotectonics alps mid-atlantic ridge Sweden bohus granite Norway Scandinavia
2015/9/30
Field observations and studies of the joints and dykes in an area shed light on its younger tectonic development; thus, joint orientations measured in Southern Sweden and in Norway have been statistic...
Tectonics and seismicity of the ApulianRidge south of Salento peninsula(Southern Italy)
tectonics seismicity multichannel seismic reflection apulia lithosphere flexsure
2015/9/28
Multichannel reflection seismic data were acquired south of the Salento peninsula, in an area where crustal seismicity has been recorded. Seismic profiles show the presence of small grabens bounded by...