Regional integrated environmental modeling system: development and application     

Shuyu Wang  Congbin Fu  Helin Wei  Yun Qian  Zhe Xiong  Jinming Feng  Deming Zhao  Li Dan  Zhiwei Han  Bingkai Su  Ming Zhao  Yaocun Zhang  Jianping Tang  Hongnian Liu  Jian Wu  Xinmin Zeng  Min Chen  Lizhi Wang 《Climatic change》2015,129(3-4):499-510

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Three-Dimensional Pseudo-Lithologic Modeling Via Adaptive Feature Weighted k-Means Algorithm from Multi-Source Geophysical Datasets,Qingchengzi Pb–Zn–Ag–Au District,China     

Zhang  Zhiqiang  Wang  Gongwen  Carranza  Emmanuel John M.  Yang  Shuren  Zhao  Ke  Yang  Wangdong  Sha  Deming 《Natural Resources Research》2022,31(4):2163-2179

Natural Resources Research - Methods for the analysis and integration of multi-source geophysical datasets are fundamental technologies for three-dimensional (3D) geological modeling and subsurface...  相似文献   

Terrestrial Near-Surface Wind Speed Variations in China: Research Progress and Prospects     

Jinlin ZHA  Deming ZHAO  Jian WU  Cheng SHEN 《Journal of Meteorological Research》2021,35(3):537-556

Changes in terrestrial near-surface wind speed(NSWS) are indicative of the concentrated net effect of climate change and anthropogenic activities. Investigating change mechanisms of NSWS not only furthers the understanding of how the atmosphere changes and improves the climate analysis and projection, but also aids the evaluation and application of wind energy resources. Recent advances in studies of the changes and associated mechanisms of the NSWS over China are reviewed in this paper. Some new results have been achieved in understanding the behaviors of the NSWS changes. The NSWS over China has experienced a decrease in the past 40 years and a recovery in the recent decade, exhibiting large regional and seasonal differences. Understanding of the mechanisms of the NSWS changes has been improved in several aspects; for example, it is found that the reduced NSWS over China is due to the weakening of the pressure-gradient force(PGF) attributed to variations in large-scale ocean–atmosphere circulations(LOACs) as well as the increase of surface roughness due to the land use and cover change(LUCC). The main methods used to analyze the NSWS changes and corresponding mechanisms are also elucidated and discussed.However, studies are still lacking on the mechanisms for multi-timescale(seasonal, interannual, decadal, multidecadal) variations in the NSWS over China, and it remains unknown about the contributions of different forcing factors to the NSWS changes. Finally, key scientific issues regarding our understanding of the NSWS changes are proposed for future investigation.  相似文献   

辽东青城子矿集区白云金矿床煌斑岩的岩石成因：年代学、地球化学与Pb、Hf同位素约束          下载免费PDF全文

贾宏翔  陈仁义  庞振山  林鲁军  李安  沙德铭  薛建玲  陈辉 《中国地质》2022,49(5):1605-1623

【研究目的】 白云金矿是辽东地区代表性的大型金矿床之一，通过厘清矿区内基性脉岩的形成时代、成因及其构造背景，有助于深化对区域构造演化过程及矿床成因的认识。【研究方法】 本文基于矿床的野外地质特征，对与矿化有密切关系的煌斑岩开展了岩相学、年代学和地球化学研究。【研究结果】 煌斑岩LA-ICP-MS锆石U-Pb年龄为（126.81±0.65） Ma，表明形成于早白垩世。岩石地球化学结果显示，煌斑岩属于碱性系列、钾玄质岩石，具有富镁（MgO=3.63%~4.07%，Mg^#=54~60）、富钾（K₂O/Na₂O=1.26~3.47）、富碱（K₂O+Na₂O=4.41%~5.23%）的特征；富集大离子亲石元素（Rb、Th、U）和轻稀土元素，亏损高场强元素（Nb、Ta、Ti）和重稀土元素，具有典型的与俯冲有关的弧岩浆岩特征。同位素地球化学结果显示，煌斑岩富集放射性Pb同位素；锆石¹⁷⁶Hf/¹⁷⁷Hf为0.282117~0.282471，具有负的ε_Hf (t)值（-20.80~-7.81），指示岩浆源区为受俯冲熔体/流体交代的富集岩石圈地幔。【结论】 结合区域大地构造背景，白垩纪时，由于古太平洋板块俯冲后撤产生伸展拉张环境，软流圈地幔物质的上涌可能促使EMII型富集地幔的部分熔融而形成基性岩浆，并沿郯庐深大断裂带及其次一级断裂上侵形成白云矿区煌斑岩。因此，本区早白垩世基性岩浆活动是对该时期华北克拉通东部岩石圈减薄的响应。  相似文献   

关于农垦国有土地使用权确权登记工作的探讨     

肖德明  牛利斌 《测绘与空间地理信息》2022,45(4)

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