Research on the distribution of mantle CO2 should involve comprehensive analysis from CO2 source to accumulation.The crust-mantle pathway system is the key controlling factor of the distribution of mantle CO2,but has received little attention.The pathway
在瑞典南端有一座叫做斯托拉的小岛.在这个地势不高的岛上,有松树、羊和一些废弃的度假屋.过去几百年里,该岛一直是一个抛锚点.但如今岛岸边的水域大多平静,来到这里的主要访客是迁徙的天鹅,偶尔也会见到游艇.rn2021年5月,一座新“岛”出现在这里:在距离岸边仅百米远的海水中,有一艘正方形的木筏,其顶部有两个经过改制的船运大集装箱.在这个漂浮的平台上有不少潜水员和考古学家,他们正在试图探索躺在海底的丹麦格里桑登号战舰(简称格里桑登号)的船骸.据史料记载,这艘战舰沉没于1495年夏季,当时船上有大量军人和丹麦贵族
The Mariana subduction structure is a hot topic in ocean-ocean subduction zone research,and its subduction mechanism has attracted wide attention from experts and scholars in China and abroad.Based on the multi-channel seismic data of survey line MGL1204
Three-dimensional (3D) static modelling techniques are applied to the characterization of the Qishn Formation(Fm.) in the Sharyoof oil field locating within the Masila basin,southeastern Yemen.The present study was initiated by the seismic structural inte
Despite the upsurge in hydrocarbon exploration in the Lake Albert Rift Basin (LARB) over the past three decades,systematic characterization of hydrocarbon compositions remains lacking,leading to uncertainties in source rock and oil generation determinatio
In the Qaidam basin,Northwest China,karstic fissures and caves are developed in many places of the Lower Carboniferous Chengqianggou Fm.and Huaitoutala Fm.and the Upper Carboniferous Keluke Fm.,in which are found typical karstic marks.Several suites of tr
A mixed siliciclastic-carbonate system that responds to changes in Permian climate and subsequent carbonate platform evolution is investigated using microscopic details of the Middle Permian Amb Formation (Fm.),in Saiyiduwali section,Khisor Range,northern
The Early-Middle Devonian Shugouzi Formation in the Quruqtagh block consists mainly of clastic rocks.However,their provenance has been scarcely studied since it was named.Geochemistry of clastic rocks was commonly used to interpret the provenance.Detrital
Cosmogenic nuclide exposure dating is one of the most intensively applied dating methods with which to study glacial geomorphology.Glacial erratics have been the major dating objective in many studies.Some research has proposed that glacial erratics may u
为研究考虑内力状态的连续刚构桥的地震反应及易损性情况,以一座非规则大跨高墩连续刚构桥为对象,基于MIDAS/Civil和OpenSees平台分别进行施工过程模拟和非线性动力分析,并采用等效荷载法将内力等效荷载附加到OpenSees模型上,使其处于对应的等效内力状态;选取40组典型的速度脉冲型近断层地震动记录为输入,采用增量动力分析法进行考虑内力状态的地震易损性分析,对比分析了考虑内力状态与否对连续刚构桥地震易损性的影响.结果 表明:所采用的内力等效荷载方法能够较好地考虑成桥内力状态;考虑内力状态与否对成桥