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A new model of the upper mantle structure beneath the western rim of the East European Craton
the upper mantle structure beneath the western rim the East European Craton
2015/1/6
We present a new 1-D P wave seismic velocity model (called MP1-SUW) of the upper mantle structure beneath the western rim of the East European Craton (EEC) based on the analysis of the earthquakes rec...
The sensitivity of GNSS measurements in Fennoscandia to distinct three-dimensional upper-mantle structures
GNSS measurements Fennoscandia three-dimensional upper-mantle structures
2015/1/6
The sensitivity of global navigation satellite system (GNSS) measurements in Fennoscandia to nearby viscosity variations in the upper mantle is investigated using a 3-D finite element model of glacial...
Positive geothermal anomalies in oceanic crust of Cretaceous age offshore Kamchatka
Positive geothermal anomalies oceanic crust Cretaceous age offshore Kamchatka
2014/12/31
Heat flow measurements were carried out in 2009 offshore Kamchatka during the German-Russian joint-expedition KALMAR. An area with elevated heat flow in oceanic crust of Cretaceous age – detected ~30 ...
南海东部现时地壳运动、震源机制及晚中新世以来的板块相互作用
马尼拉海沟 地壳运动 构造演化
2014/12/31
南海东部的板块汇聚带是了解南海和菲律宾海晚中新世以来构造演化的一个重要窗口.针对这一区域地壳运动的研究,获得了该区内微块体的现时地壳运动特征及其动力机制,在此基础上结合俯冲板片形态和震源机制资料提出了该区晚中新世以来的板块汇聚作用特征.研究发现:晚中新世晚期,菲律宾海板块西缘在南、北部的西向运动均受到限制的情况下,位于中间区域的吕宋岛北部则由于其西侧相对自由而继续往NW方向运动.该过程中,菲律宾大...
华南沿海地区地壳厚度与泊松比研究
华南沿海 接收函数 地壳厚度 泊松比
2014/12/31
华南沿海地区地壳厚度和泊松比分布是了解该地区板块运动和地球内部物质结构的重要依据.本文利用广东台网和福建台网共75个固定地震台记录到的2001—2008年远震波形的接收函数,通过H-κ叠加法获得了74个台站下方平均地壳厚度和泊松比值的有效估计,结合该区断裂分布、地震活动和地形地貌特征,得出以下结论:(1)该区地壳厚度范围在26~32 km之间,由陆向洋、自北向南减薄.泊松比0.23~0.28,由陆...
中国海陆莫霍面及深部地壳结构特征研究是东亚地区宏观构造格架研究中的重点内容之一.本文以地震测深等数据为约束信息,以重力数据为基础,通过分区计算,反演了中国海陆莫霍面深度.依据地壳性质与莫霍面深度分布特征,划分了莫霍面深度梯级带与分区,并对各分区的莫霍面分布特点进行了归纳、总结.并选取阿尔泰—巴士海峡典型剖面进行了重、震反演,建立了密度结构.剖面上莫霍面深度和深部结构能够清晰地反映中国大陆"三横、两...
南北构造带及邻域地壳、岩石层速度结构特征研究
地壳 岩石层速度结构 地震层析成像
2014/12/31
本文利用重力数据采用Parker-Oldenburg方法反演了南北构造带及邻域地区的地壳厚度,同时采用体波地震层析成像方法反演了研究区的地壳至上地幔的三维速度结构.根据计算结果对研究区的地壳及岩石层结构进行了探讨,力图揭示南北构造带及邻域地壳、岩石层变形特征,并且对青藏高原边缘活动带壳幔构造演化的深部成因、研究区的上地幔流变性及其动力学意义进行了相应的讨论.通过分析研究表明南北构造带地区为地壳厚度...
Tomography of core-mantle boundary and lowermost mantle coupled by geodynamics: joint models of shear and compressional velocity
Composition and state Geological and geophysical evidences of deep processes
2015/8/18
We conduct joint tomographic inversions of P and S travel time observations to obtain models of delta v_P and delta v_S in the entire mantle. We adopt a recently published method which takes into acc...
中天山南缘桑树园子剪切带早志留世韧性变形事件及其地质意义
锆石 桑树园子剪切带 中天山
2014/12/20
桑树园子剪切带位于中天山南缘，经历了多期韧性变形事件。对其变形样式和变形历史进行深入研究有利于加深对天山造山带构造演化的认识。本文对剪切带北部发生强烈韧性变形的岩石进行变形样式及相关年代学研究，识别出一期早志留世右旋剪切运动。该期走滑剪切事件造成部分前寒武纪斜长角闪岩发生深熔作用形成浅色脉体，使花岗闪长岩发生强烈的糜棱岩化石，并伴随同构造花岗质脉体的侵入。斜长角闪岩中浅色脉体中的锆石具弱的振荡环带...
Digital terrain model reconstruction and preliminary scientific exploration planning of the Chang'E 3
Digital terrain Model Chang’e-3 Yutu panoramic camera
2014/7/23
At 13:11 (GMT) December 14, 2013 Chang’e 3 (CE-3) successfully landed at 19.51° W, 44.12° N northwestern Mare Imbrium on the Moon, making it China's first planetary mission to land on a celestial body...
An inventory of topographic surface changes: the value of multi-temporal elevation data for change analysis and monitoring
DEM/DTM Geomorphology Change Detection SAR, Multitemporal Monitoring Accuracy Error
2014/7/23
Landscape change resulting from human activities continues to be a primary topic in geographic research. Many studies have focused upon human-induced changes in two dimensions, namely in land cover. H...
Crustal velocity structure of the Deccan Volcanic Province, Indian Peninsula, from observed surface wave dispersion
Deccan Volcanic Province Surface waves Crustal structure
2015/8/18
Through inversion of fundamental mode group velocities of Love and Rayleigh waves, we study the crustal and subcrustal structure across the central Deccan Volcanic Province (DVP), which is one of the ...
Late Pleistocene variation in lignin and fatty acids from core TKN-2004 in a small mountain basin in central Japan
lignin vegetation TMAH thermochemolysis glacial Takano Basin central Japan Late Pleistocene
2017/4/11
We generated a record of lignin and fatty acid compositions from the TK-2004 core in Takano Basin, central Japan,
during 39–162 ka by TMAH-thermochemolysis-GC/MS. We tested lignin and fatty acid comp...
Knickpoint formation, rapid propagation, and landscape response following coastal cliff retreat at the last interglacial sea-level highstand: Kaua‘i, Hawai‘i
Knickpoint formation rapid propagation landscape response following coastal cliff retreat last interglacial sea-level highstand: Kaua‘i Hawai‘i
2014/4/8
Upstream knickpoint propagation is an important mechanism for channel incision,and it communicates changes in climate, sea level, and tectonics throughout a landscape.Few studies have directly measure...
Incipient sediment motion across the river to debris-fl ow transition
Incipient sediment motion the river debris-fl ow transition
2014/4/8
Sediment transport in mountain channels controls the evolution of mountainous terrain in response to climate and tectonics and presents major hazards to life and infrastructure worldwide. Despite its ...