【摘 要】
：
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
【机 构】
：
Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Ocean University o
论文部分内容阅读
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 in the Mariana fore-arc and DSDP ocean drilling data,this paper studies the development and evolution characteristics of the structure and strata in the Cenozoic Mariana fore-arc sedimentary basin.The Cenozoic strata are divided into six seismic sequences,with the possible era of each seismic sequence discerned,and the relationship between fault development and earthquakes analyzed.The episodic activity of the volcanic chain of the Mariana island arc is thought to control the tectonic and stratigraphic development pattern of the Cenozoic sedimentary basin in the fore-arc.Between 16°N-19°N and 146°E-151°E,the maximum thickness of the sedimentary center of the Cenozoic fore-arc sedimentary basin in Mariana is about 2360 m.Normal faults are developed in the area and some broke to the seabed,indicating that the Mariana island arc is still in the post-arc expansion stage.The application of multi-channel seismic sections in structural and stratigraphic evolution study is an important means to elucidating the Mariana subduction mechanism.
其他文献
In order to understand how the metallogenic process of porphyry deposit specifically and directly respond to regional uplifting and exhumation,we compiled previous fluid inclusion data of 32 porphyry deposits in China by recalculating the fluid trapping d
Deep mineral exploration is increasingly important for finding new mineral resources but there are many uncertainties.Understanding the factors controlling the localization of mineralization at depth can reduce the risk in deep mineral exploration.One of
The distribution of selected critical elements in the sedimentary rocks of the Carboniferous coal-bearing series within the Polish Coal Basins is presented.Critical elements such as Be,Mg,Si,P,Sc,V,Co,Y,Nb,In,Sb,La,Ce,Hf,Ta,W,Bi were analysed using induct
The Neoproterozoic banded iron formations (BIFs) were closely associated with the “Snowball Earth” during the breakup of the Rodinia,thus they played an important role in our understanding of the atmospheric and oceanic oxygen levels during this period.In
The precipitation of authigenic quartz plays a significant role to reduce the reservoir characteristics and enhance the stiffness of the rock.The Es1 sandstone of Shahejie Formation is acting as a significant hydrocarbon producing rock in the Nanpu Sag.Va
全球各大科学网站,几乎每天都有天文学新研究成果发布.就让我们来看一看最近一些引起关注的天文学新发现.rn嫦娥5号带回月球样本揭示月球岩石年龄rn由中国发射的嫦娥5号月球探测器,最近把一些新的月球岩石和土壤样本带回了地球.这是过去40年来探测器首次把月球样本带回地球.根据这些新样本,一个国际研究团队已经确定这些月球岩石的年龄接近19.7亿年.科学家认为,嫦娥5号带回的样本填补了10亿年的空白.此话怎讲?
Fourteen species of nonmarine gastropod opercula are found to be in high abundance in the Oligocene upper member of the Yehucheng Formation,Lanzhou Basin,northwest China.They are attributed to two families,namely Bithyniidae and Assimineidae,and four gene
霜叶红于二花月rn秋天的彩林是一年中绝对不应该错过的景致之一.绿的、黄的、橙的、红的和紫的……山林一改夏日单调的绿色,毫不吝啬地展现出各种各样的颜色.叶片变色不久便会彻底结束使命,掉落并在地上厚厚地堆积,仿佛为树木在冬天的休眠铺好了床.rn落叶乔木到了秋天叶片为何会变色?其实,这和光合作用有关.树木叶片中的叶绿素通过光合作用给树木制造养分,也给叶片染上了绿色.从春季到夏季,再到初秋,树木叶片会持续合成叶绿素,因此在这一过程中叶片都呈现绿色.
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