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Ross Mitchell等-NC:晚白垩世真极移振荡
Ross Mitchell 晚白垩世 真极 移振荡
2021/6/30
真极移(行星旋转轴的重新定向)在其他行星和卫星中都有很好的记录,在地球上通过人造卫星也能够得到观测。但由于板块构造引起的同时的运动,检测真极移在地球过去的普遍性变得复杂。学术界对晚白垩世约84 Ma的真极移是否存在尚有争议。 来自意大利 Scaglia Rossa灰岩的经典古地磁数据是反对存在84 Ma真极移的主要依据。近日,岩石圈演化国家重点实验的Ross Mitchell研究员与国际合作者发表...
Ross Mitchell等-NREE:超大陆旋回(图)
Ross Mitchel NREE 超大陆 旋回
2021/4/25
超大陆是板块构造自我组构的表达。在过去的约20亿年,研究者主要识别出了三个超大陆,即潘吉亚、罗迪尼亚和哥伦比亚。太古宙超级克拉通(不同于超大陆,尺度相对较小)在构造上似乎是不同的,但大陆周期性的聚合和裂解型式可能延续到约30亿年前。近日,岩石圈演化国家重点实验的Ross Mitchell研究员与国际合作者在NREE发表超大陆旋回的综述文章,讨论了超大陆的出现如何为现代全球板块构造的开启提供最小年龄...
Study in Antarctic waters reveals why Ross Ice Shelf melts in summer(图)
Antarctic waters reveals Ross Ice Shelf melts summer
2019/10/22
A new paper by NSF-funded researchers at the Earth Institute at Columbia University offers fresh insights into the forces causing the world's largest ice shelf to melt.The Ross Ice Shelf, a part of th...
First stage of INTRAMAP: INtegrated Transantarctic Mountains and Ross Sea Area Magnetic Anomaly Project
magnetic anomalies Antartica magnetic map compilation potential field data
2015/10/8
INTRAMAP (INtegrated Transantarctic Mountains and Ross Sea Area Magnetic Anomaly Project) is an international effort to merge the magnetic data acquired throughout the "Ross Sea Antarctic Sector" (sou...
Using overlapping sonobuoy data from the Ross Sea to construct a 2D deep crustal velocity model
Sonobuoy Multi-channel seismic Ross Sea Finite-difference 2D velocity model Crustal structure
2014/4/10
Sonobuoys provide an alternative to using long streamers while conducting multi-channel seismic (MCS) studies, in order to provide deeper velocity control. We present analysis and modeling techniques ...