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Evolution of Asian drying since 30 Ma revealed by clay minerals record in the West Pacific and its tectonic-climatic forcing

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Science China Earth Sciences 2023年第6期66卷 1365-1382页

作者： Yi tang Shiming WAN Debo ZHAO Zhaojie YU Zhaokai XU Jin ZHANG zehua SONG Mengjun LI Hualong JIN Wenjun JIAO Hongkun DONG Anchun LI Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China University of Chinese Academy of Sciences Beijing 100049China

As the second largest dust source on the globe,the tectonic and climatic evolution of continental Asia has an important impact on regional and global climate *** West Pacific is the main sediment sink for eolian dust transported eastward from the Asian *** minerals,as the major fine-grained weathering products of continental rocks,can be readily transported by wind or currents over long distances and thus have been widely used in the reconstruction of paleoclimate and weathering ***,the overall evolutionary tendency and response mechanism of clay mineral records over large spatial and long timescales across Asia remain ***,two continuous and high-resolution clay mineral records since 30 Ma were reconstructed from sediments at Deep Sea Drilling Program(DSDP)Sites 292 and 296 in the Philippine *** minerals and Sr-Nd isotope compositions were used to constrain provenance and reconstruct the drying history of the dust source region since the *** results show that the clay-sized detrital sediments in the Philippine Sea are a mixture of Asian eolian dust and volcanic materials from the West Pacific *** on the clay mineral compositions and eolian flux,we reveal that the Asian interior has been continuously drying since the late Oligocene and that stepwise enhanced aridification occurred at approximately 20,14,7,and 3 *** with other regions of the world,the relative contents of illite and chlorite increased more dramatically in Asia during the late Cenozoic,and the inconsistency became more obvious at approximately 20 *** 3 Ma,illite and chlorite have increased consistently across the *** with the Asian tectonic and climatic history,we suggest that the increase in illite and chlorite from Asia between 20 and 3 Ma was mainly in response to the uplift of the Himalayan-Tibetan Plateau,whereas after 3 Ma,it was primarily controlled by global cooling driven by the expansion of the Arctic ice shee

关键词： Clay minerals Sr-Nd isotopes Sediment provenance Eolian dust West Pacific Late Cenozoic

Biophotonic Activity and Transmission Mediated by Mutual Actions of Neurotransmitters are Involved in the Origin and Altered States of Consciousness

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Neuroscience Bulletin 2018年第3期34卷 534-538页

作者： Weitai Chai Zhengrong Han Zhuo Wang zehua Li Fangyan Xiao Yan Sun Yanfeng Dai Rendong tang Jiapei Dai Wuhan Institute for Neuroscience and Neuroengineering South-Central University for Nationalities Department of Neurobiology College of Life SciencesSouth-Central University for Nationalities Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology State Key Laboratory of Cognitive Neuroscience and Learning IDG/Mc Govern Institute for Brain ResearchCollaborative Innovation Center for Brain Science Beijing Normal University

Dear Editor Despite remarkable advances in our understanding of brain functions,the neural substrates and correlates of consciousness remain unclear[1].It has been argued that classical physics is intrinsically incapa... 详细信息

关键词： Biophotonic Activity and Transmission Mediated by Mutual Actions of Neurotransmitters are Involved in the Origin and Altered States of Consciousness NMDAR

Abnormal strain changes observed by a borehole strainmeter at Guza Station before the Ms7. 0 Lushan earthquake

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Geodesy and Geodynamics 2013年第3期4卷 19-29页

作者： Qiu zehua Yang Guang tang Lei Guo Yanping Zhang Baohong Institute of Crustal Dynamics China Earthquake Administration Guza Seismostation Earthquake Administration of Sichuan Province

Several days before the MsT. 0 Lushan earthquake, the YRY-4 borehole Strainmeter at Guza Station recorded prominent abnormal changes. The strain anomalies are very striking on the smooth background of several years＇ recording after the Wenchuan earthquake. However, because construction in the town of Guza has been undergoing rapid development in recent years, many factors have interfered with observations at the station. Whether or not the observed strain changes before the Lushan earthquake were affected by any of the sources of interference becomes a question that must be answered. Among the likely sources of interference, apartment construction, sportsground reconstruction, and tunnel cutting can be excluded by analyzing the morphological characteristic of the anomalies. The two remaining most possible sources are road construction in front of the station and the water level change of the nearby Dadu River caused by water filling into and discharging from an upstream reservoir. Through field investigation, comparison of the correlation between the strain and the seismographic recordings, comparison of the correlation between the strain and the Dadu River flow recordings, and analysis of the strain anomaly characteristics, we conclude that the abnormal changes observed at Guza Station cannot be attributed to either of these two sources but should be related to the Lushan earthquake.

关键词： Lushan earthquake earthquake precursor borehole strain observation YRY-4 borehole strain- meter interference

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中国钻孔体应变台网观测到的地球球型振荡

大地测量与地球动力学 2007年第6期27卷 37-44页

作者：唐磊邱泽华阚宝祥中国地震局地壳应力研究所北京100085

利用中国钻孔应变台网（20多个台站）TJ式钻孔体应变仪的观测资料，提取2004年12月26日印尼苏门答腊地震激发的地球球型振荡。通过统计分析，识别了众多振型，计算了0S9～0S16等振型的品质因子并与PREM模型进行了比较，结果十分相近。... 详细信息

利用中国钻孔应变台网（20多个台站）TJ式钻孔体应变仪的观测资料，提取2004年12月26日印尼苏门答腊地震激发的地球球型振荡。通过统计分析，识别了众多振型，计算了0S9～0S16等振型的品质因子并与PREM模型进行了比较，结果十分相近。绘制了16个台站记录的球型振荡0S3-0S25的振幅谱和相位谱，结果显示低频、中频基频球型振荡的振幅总体趋势上要比高频基频球型振荡的振幅大，但是各台站频谱皆不相同。

关键词：钻孔体应变仪地球自由振荡球型振荡品质因子谱分析

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对两次印尼地震环型振荡剪应变方向的分析

大地测量与地球动力学 2008年第2期28卷 56-60,76页

作者：唐磊邱泽华阚宝祥中国地震局地壳应力研究所北京100085

利用泰安台YRY-2型钻孔差应变仪的观测资料，研究了两次印尼苏门答腊地震的环型振荡的剪应变方向。首先对差应变仪观测数据进行实地标定，然后用标定后的数据检测2004年12月26日和2005年3月28日印尼苏门答腊两次大地震激发的环型振荡，... 详细信息

利用泰安台YRY-2型钻孔差应变仪的观测资料，研究了两次印尼苏门答腊地震的环型振荡的剪应变方向。首先对差应变仪观测数据进行实地标定，然后用标定后的数据检测2004年12月26日和2005年3月28日印尼苏门答腊两次大地震激发的环型振荡，发现基频环型振荡0T11～0T18最明显，且两次地震的振幅变化趋势基本一致。两次地震得到的0T11～0T18型环型振荡的最大剪应变方向随时间变化比较小。通过与理论预期的对比，发现实测值的平均值与理论值之差仅为2°。这不仅证实了理论模型的正确性，同时也证实了该观测的可靠性。

关键词：钻孔差应变仪实地标定地球环型振荡最大剪应变方向苏门答腊地震

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用应变地震观测求解震源矩张量的基本原理

地球物理学报 2020年第2期63卷 551-561页

作者：邱泽华唐磊赵树贤郭燕平中国地震局地壳应力研究所

震源机制解,即对地震矩张量的推断,对于地震研究具有至关重要的意义.应变地震观测是张量观测,与摆式地震仪的位移矢量观测不同,可以为地震研究提供新的数据源.本文讨论用应变地震观测求解震源矩张量的基本原理.在距离震源足够远的地方,... 详细信息

震源机制解,即对地震矩张量的推断,对于地震研究具有至关重要的意义.应变地震观测是张量观测,与摆式地震仪的位移矢量观测不同,可以为地震研究提供新的数据源.本文讨论用应变地震观测求解震源矩张量的基本原理.在距离震源足够远的地方,地震波可以看成平面波,其性质决定于震源矩张量.假设平面地震波的应变张量可以由震源矩张量通过坐标变换计算得到,就可以通过观测应变地震波求解震源机制.这个假设至少对于双力偶震源机制是成立的.由此可以证明,在理想的无限介质中,只要有两个以上不同地点的应变地震波观测,就可以解出震源矩张量.这为解决震源机制问题提供了新的方法.目前的地震矩张量求解方法需要两方面的条件:或者需要很多观测点(例如体波反演),或者需要长周期地震波资料(例如面波反演).这些方法只适用于分析比较大的地震.对于小震,因为通常其震中周围不会有足够多的摆式地震仪观测点观测到其地震波,而地震波周期又短,难以利用传统方法给出可靠的震源机制解,所以只需少数观测点就能求解震源矩张量的新方法特别有意义.用应变地震观测求解震源机制,可以给出更为精确的结果.

关键词：震源机制应变地震仪地震矩张量地震波应变张量钻孔应变仪

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钻孔应变台站记震能力研究

大地测量与地球动力学 2010年第B11期30卷 31-35页

作者：宋茉邱泽华唐磊中国地震局地壳应力研究所北京100085

以昌平台体应变为例,研究了体现钻孔应变台站记震能力的方法,并对计算步骤和处理方法进行了说明。选取20套中国大陆观测时间较长且数据较好的钻孔体应变仪观测记录作为研究对象,计算出其各自的记震能力线,给出各台对6级地震的响应范围... 详细信息

以昌平台体应变为例,研究了体现钻孔应变台站记震能力的方法,并对计算步骤和处理方法进行了说明。选取20套中国大陆观测时间较长且数据较好的钻孔体应变仪观测记录作为研究对象,计算出其各自的记震能力线,给出各台对6级地震的响应范围。此公式不仅可以量化钻孔应变仪的对地震的反应能力,而且是对地震仪器的一种新的科学评估方法。同时,基于地震前兆释放能量小于地震发生时释放的能量的基本理解,此结果对于确定地震前兆的位置和震级范围也有参考价值。

关键词：钻孔应变记震能力地震记录距离判定

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泰安台钻孔差应变观测的实地标定

大地测量与地球动力学 2007年第6期27卷 119-123页

作者：阚宝祥邱泽华唐磊中国地震局地壳应力研究所北京100085

结合钻孔差应变仪的工作原理,借助体应变观测资料,提出了利用理论固体潮对泰安台差应变观测进行实地标定的新方法。通过对标定系数和滞后时间的分析认为:元件2、4工作状况比较稳定,观测值差应变2是比较可靠的;元件3的标定系数浮动较大... 详细信息

结合钻孔差应变仪的工作原理,借助体应变观测资料,提出了利用理论固体潮对泰安台差应变观测进行实地标定的新方法。通过对标定系数和滞后时间的分析认为:元件2、4工作状况比较稳定,观测值差应变2是比较可靠的;元件3的标定系数浮动较大。经过实地标定后,差应变1、2基本上与各自的理论值相一致。由于标定系数随时间变化,所以要针对特定问题的时间段进行实地标定。

关键词：泰安台钻孔差应变观测实地标定理论固体潮时间滞后

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钻孔四分量应变观测自检内精度分析

大地测量与地球动力学 2010年第B11期30卷 36-39页

作者：唐磊邱泽华宋茉中国地震局地壳应力研究所北京100085

根据钻孔四分量应变观测特点,分析了评价该观测手段的质量指标:相对标定自检内精度。介绍了相对标定自检内精度方法以及存在的问题。通过对比分析平均值、相关系数等,提出不同的求偏差方法,改进了相对标定自检内精度法,使其能尽量客观... 详细信息

根据钻孔四分量应变观测特点,分析了评价该观测手段的质量指标:相对标定自检内精度。介绍了相对标定自检内精度方法以及存在的问题。通过对比分析平均值、相关系数等,提出不同的求偏差方法,改进了相对标定自检内精度法,使其能尽量客观地评价观测质量。

关键词：钻孔四分量应变观测相对标定偏差自检内精度平均值