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Surface layer Nd isotopic composition of ferromanganese crusts collected from the Takuyo-Daigo Seamount reflects ambient seawater
ferromanganese (Fe-Mn) crust Nd isotopic composition seawater Takuyo-Daigo Seamount
2017/4/10
The neodymium (Nd) isotopic composition of the surface layers of eleven ferromanganese crust samples collected
from the Takuyo-Daigo Seamount (northwest Pacific Ocean) was determined. This is the fir...
河北隆尧现今地裂缝与1966年邢台地震关系
隆尧现今地裂缝 1966年邢台地震 发震构造
2019/1/4
通过对隆尧现今地裂缝与1966年河北邢台地震时的地裂缝、余震、等震线、地形变等资料进行对比，证明了隆尧地裂缝的形成与1966年邢台地震有关。隆尧地裂缝的再次出露，对1966年邢台地震发震构造的研究提供了研究基础。
勘探实践表明，鄂尔多斯盆地东部奥陶系风化壳蕴含了丰富的天然气资源，是重要的勘探领域，深入分析盆地东部奥陶系风化壳岩溶储层的孔隙充填特征，对储层平面分布预测及提高钻探成功率具有重要意义。早奥陶世，鄂尔多斯盆地处于稳定的碳酸盐台地沉积环境，马家沟期发育广泛的碳酸盐岩地层，其中马家沟组马五1亚段和马五2亚段发育典型的含硬石膏结核白云岩坪沉积，至中晚奥陶世，受构造抬升后遭受长达1.3亿年的风化溶蚀，形成风...
利用重震资料研究豫北及邻区地壳结构特征与地震分布
小波多尺度分解 布格重力异常 壳幔结构 豫北及邻区
2018/7/10
文中利用小波多尺度分解方法对豫北及邻区重力场进行了波场分离，得到多阶重力小波细节及区域重力场信息。随后利用Parker法密度界面反演对该区Moho界面进行了反演分析。通过对不同阶次小波细节的分析研究，并结合该区内已有3条地震测深剖面资料，对该区地壳深部结构进行了深入研究。结果表明，研究区壳内结构以隆坳相伴的密度非均匀分布为主，其密度在横向和纵向上均存在明显的非均匀性。其中，中上地壳重力场特征与地表...
用S波包络展宽法对青藏高原东南缘及邻区地壳介质非均匀性谱结构进行了研究，并以8~16Hz非均匀性谱结构为例分析了地壳介质非均匀性空间特征及其与强震孕育之间的关系。结果表明，研究区内地壳介质呈现强烈的、复杂的横向非均匀性。上地壳上部区域，沿龙门山断裂带、安宁河断裂带北段介质非均匀性程度相对较强，非均匀体尺度相对较小；鲜水河断裂带炉霍-道孚段、安宁河断裂带南段介质非均匀性程度相对较弱，非均匀体尺度相对...
洋底高原及其对地球系统意义研究综述
洋底高原 中特提斯 青藏高原
2016/7/28
洋底高原是洋壳的重要组成部分,是广泛分布在洋底的一种面积广大、以镁铁质-超镁铁质岩石为主并且具有异常厚度洋壳的区域。由于洋底高原分布广泛,加之其形成与地幔柱之间具有十分密切的关系,因此洋底高原是研究地球深部过程的一个重要窗口。本文系统总结了洋底高原的研究成果,主要包括洋底高原的全球分布情况、基本特征(产出规模、形成时限、岩石组合、结构组成、地球化学)、鉴别标志、成因机制、地球动力学意义以及洋底高原...
Magnetic anomaly patterns over crustal blocks of the King Edward VII Peninsula, Marie Byrd Land, West Antarctica
Edward VII Peninsula Aeromagnetic anomalies tectonic block west antarctic rift system Marie Byrd Land antartica
2015/9/28
Within the framework of the GITARA II project an aeromagnetic survey was performed during the GANOVEXVII expedition (1992/1993) over the King Edward VII Peninsula in northwestern Marie Byrd Land (West...
Fault plane solutions of crustal earthquakes in Southern Italy (1988-1995): seismotectonic implications
southern Italy focal mechanisms seismicity stress distribution
2015/9/28
The Southern Apennines and the Sicilian-Calabrian regions belong to the complex geodynamic Central Mediterranean area, which is dominated by the NNW-SSE convergence of the European and African plates ...
SEMI-AUTOMATIC LANDFORM MAPPING AT STEEP SLOPES
semi-automatic segmentation landform mapping image matching surface parameterization
2015/9/28
The traditional mapping on digital aerial photos and elevation models has its limits at steep slopes where the surface is only very sparsely
sampled even in high resolution data sets. As a consequenc...
Resistivity and heterogeneity of Earth crust in an active tectonic region,Southern Tuscany (Italy)
crustal exploration magnetotellurics geothermal areas
2015/9/14
Southern Tuscany, belonging to the inner zone of the Northern Apennines, Italy, is an ideal laboratory for observing the physical features of the lithosphere and their evolution in tectonically active...
High-resolution marine magnetic surveys for searching underwater cultural resources
High-resolution marine magnetic surveys marine archaeological search ship-wreck amphorae
2015/9/8
Recently two marine magnetic surveys, combined with the use of a multi-beam sonar (Kongsberg Marittime EM
300 multibeam: 30 KHz frequency echosounder for hydrographic purposes; acoustic lobe composed...
Glacio and hydro-isostasy in the Mediterranean Sea:Clarks zones and role of remote ice sheets
sea-level variations glacial isostasy Mediterranean Sea
2015/9/2
Solving the sea-level equation for a spherically symmetric Earth we study the relative sea-level curves in the Mediterranean Sea in terms of Clarks zones and we explore their sensitivity to the time-h...
Cooling of a channeled lava flow with non-Newtonian rheology: crust formation and surface radiance
Rheology Magmas Thermodynamics Lava flow Effusion rate
2015/8/27
We present here the results from dynamical and thermal models that describe a channeled lava flow as it cools by radiation. In particular, the effects of power-law rheology and of the presence of bend...
Buried archeological remains connected to the Greek-Roman harbor at Tindari (north-east Sicily):results from geomorphological and geophysical investigations
Buried harbour structures Geophysical investigation Horizontal-to-vertical spectra ratio method Stratigraphy Digital terrain model
2015/8/24
In recent years, detailed geoarcheological investigations have been carried out to search for traces of the ancient Tindari harbor (north-east Sicily, Italy). A digital terrain model supported the hyp...