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Characteristics of magnetic fabrics of Jiangshan-Shaoxing collision belt and its tectonic implications

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Chinese Science Bulletin 1999年第19期44卷 1819-1824页

作者： zhongyue shen Ying Ye Dajun Fang Xiaodong Tan Zhejiang Univ Dept Earth Sci Hangzhou 310027 Peoples R China

The study of anisotropy of magnetic susceptibility (AMS) of rocks from the northern part of Jiangshan-Shaoxing collisional belt demonstrates that the minimum principal AMS axes are the most concentrated one in various types of rocks. The planar projection of the minimum axis shows that the main compressive stress lies on northwest 30°-60°, which trends domi-nantly in northwest-southeast of Chencai area and arc-like disperse towards both north

关键词： Jiangshan-Shaoxlng collision belt magnetic fabric paleomagnetism. Mesozoic.

Paleomagnetism of early Triassic Daye Formation and its tectonic implications

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Chinese Science Bulletin 1999年第5期44卷 412-418页

作者： zhongyue shen Dajun Fang Penyang Wang Xiaodong Tan Zhaolian Wang Zhejiang Univ Dept Earth Sci Hangzhou 310027 Peoples R China Daqing Petr Inst Daqing 163000 Peoples R China

The new paleomagnetic data of the early Triassic Daye Formation from Hubei Province are reported. The ChRM passes consistency test and reversal test. Two magnetic components were isolated with principal component analysis （PCA）. Component B is a ChRM and component A was acquired by remagnetization during lndosinian cycle. Rock magnetic study shows that the carrier is dominantly detrital magnetite. According to the data, in conjunction with recently published Triassic paleornagnetic results, mean paleopole of the Triassic Yangtze Block is calculated as 30.3°N, 198.4°E, α95 = 9.2°.Distribution of all Triassic declinations indicates obviously local rotation in the mid-Yangtze areas,which results in consistence of the declinations with fold axes. By comparison with Triassic paleomagnetic data in the South China Block and some of geological evidence, it is inferred that the timing of the suture between the Yangtze Block and the South China Block is earlier in western part than in eastern part in the

关键词： Yangtze Block Triassic paleomagnetism collision orogeny.

Stability of diatomaceous silica and its geochemical implication

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Chinese Science Bulletin 1999年第23期44卷 2205-2208页

作者： Huanxin Weng zhongyue shen Mingyong Yuan Defang Guo Jianyu Chen Zhejiang Univ Dept Earth Sci Hangzhou 310027 Peoples R China Zhejiang Univ Ctr Anal & Measurement Hangzhou 310027 Peoples R China

An experiment of stability of diatomaceous silica was performed. The results show that pH value and temperature dominantly influence the stability. The pH value concerning largely dissolving diatomaceous silica is 2-3 higher than that amorphous silica due to the buffer action of coexistent clay minerals. The solubility of diatomaceous silica rises distinctly when temperature is over 40℃, which suggests the cause of distribution of large-scale diatomite de-

关键词： diatomaceous silica solubility diatomite.

New Early Triassic paleo-magnetic data from Huangben section,Guangdong and its tectonic implications

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Chinese Science Bulletin 2006年第15期51卷 1894-1902页

作者： shen zhongyue DING Jinghai YE Changhe WEN Junwei WANG Zhaoliang CHEN Zhifei Department of Earth Sciences Zhejiang University Hangzhou 310027 China

A paleomagnetic study was carried out on a total of 122 oriented cores from Daye Formation of the Huangben section, Guangdong Province. Rock magnetic investigations show that low-titanium magnetite is a dominant carrier. Detailed progressive thermal demagnetization isolated 2―3 components. The low temperature component clusters around the present geomagnetic field direction. An intermediate temperature component is isolated at 100―400℃ and is interpreted as a Yanshanian remagnetization. A high-temperature characteristic remanent mag- netization (ChRM) is obtained at 400―530℃ with D = 51.1°,I = 15.3°,α95 = 5.0° and passes generalized fold test and reversal test, suggesting high tempera- ture component is a primary remanence. Its corre- spondent pole position is 38.5°N, 212.7°E (dp = 2.6, dm = 5.1), which overlaps contemporaneous pole of Yangtze Block at 95% confidence level. Therefore, we believe that Huanan and Yangtze blocks were not separated in the Early Triassic. Compared to other published Early Triassic paleomagnetic data from Huanan Block, the inclinations are very close but the declinations are greatly variable. In stereo-projection, all the Early Triassic poles from Huanan Block lie along a small circle around the Huanan Block, im- plying that local micro-blocks rotations lead to the inconsistence of Early Triassic paleomagnetic direc- tions.

关键词：早三叠纪古磁学华南板快扬子江板快

Middle Triassic post-orogenic extension on Hainan Island: Chronology and geochemistry constraints of bimodal intrusive rocks

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Science China Earth Sciences 2013年第3期56卷 783-793页

作者： TANG LiMei CHEN HanLin DONG ChuanWan YANG ShuFeng shen zhongyue CHENG XiaoGan FU LuLu Department of Earth Science Zhejiang University Key Laboratory of Submarine Geosciences Second Institute of Oceanography State Oceanic Administration

This work studies new petrological and geochemical data and zircon U-Pb ages for bimodal intrusive rocks from Xinglong re- gion, Hainan Island. Zircon U-Pb dating yields mean 238U/26pb ages of 238 ± 2 Ma and 234±2 Ma for diabasic and granitic phases, respectively, representing the Middle Triassic emplacement. The diabase and granite bodies were formed from discrete mafic and acidic magma sources that experienced local mechanical mixing at their mutual contacts. Although SiO2 content of intrusions is bimodal, trace element ratios indicate that both were formed in a post-orogenic extensional setting. Sr-Nd isotopic composition reflects a shared EMII type enriched mantle source component, possibly influenced by subduction-fluid metaso- matism.

关键词： bimodal intrusive rocks middle Triassic post-orogenic Hainan Island

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Magma flow inferred from magnetic fabrics in Wanning gabbro pluton and diabase dykes, Hainan

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Chinese Science Bulletin 2012年第22期57卷 1982-1989页

作者： PAN XiaoQing shen zhongyue DONG ChuanWan CHEN HanLin CHENG XiaoGan YANG ShuFeng ZHANG ZhiLiang Department of Earth Sciences Zhejiang UniversityHangzhou 310027China

Measurements of anisotropy of magnetic susceptibility (AMS) were performed on a gabbro pluton and 7 diabase dykes in the Wanning area, southeast Hainan Island. Rock magnetism showed that pseudo-single domain (PSD) to multidomain (MD) Ti-poor magnetite carries the magnetic fabric in the gabbro pluton whereas MD Ti-poor magnetite carries the magnetic fabric in the diabase dykes. The corrected anisotropy degree (Pj ) in most specimens was found to be less than 1.2 which is indicative of a possible flow-related magnetic fabric. The AMS eigenvectors within each site are generally well grouped. The maximum susceptibility axes (K1 ) of the gabbro pluton are inclined towards the north at low angles (< 30°). K1 axes of the diabase dykes are inclined towards the NNW and SSE with dip angles of ≤ 30°. From this study, it appears that the emplacement mode of the gabbro pluton was characterized by intrusion from the north to the south at a low angle whereas the diabase dykes were emplaced from the NNW to the SSE at low to moderate angles. This was verified by comparison of the rock fabric to the magnetic fabric. All of this evidence leads to the conclusion that the Wanning gabbro pluton and diabase dykes were the products of pulsative intrusion from the same magma chamber in the area far to the north of Wanning, which suggests that basic rocks may exist beneath the Indosin- ian granite in the area to the north of Wanning.

关键词：辉长岩体辉绿岩岩浆流海南岛面料磁化率各向异性磁性岩石磁学

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Dose water recharge technique applies to Hangzhou? Water infiltration after pre-treated by plant ecological purification

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Dose water recharge technique applies to Hangzhou? Water inf...

Paleomagnetic results of the Cretaceous marine sediments in Tongyouluke, southwest Tarim

International Symposium on Green Technology and Ecosystem Health

作者： zhongyue shen Xiaoe Yang K.D.Balke Dept of Earth Sciences Zhejiang University MOE Key Lab of Environ Remediat & Ecol Health Zhejiang University Center of Applied Geosciences University of Tbingen

With industrial developments, we have resulted in the worsen environment and lack of clean water, not only in the surface but also in the underground water. Recent investigation shows that about 70% of surface water t... 详细信息

关键词： infiltration plant ecological purification phytoremediation water recharge

来源： cnki会议评论

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Science China Earth Sciences 2005年第3期48卷 406-416页

作者： shen zhongyue1, CHEN Hanlin1, FANG Dajun1, DING Jinghai1, ZHANG Shiben2, HUANG Zhibin2 & LI Meng2 1. Department of Earth Sciences, Zhejiang University, Hangzhou 310027 China 2. Tarim Oil Field Company, PetroChina Company Limited, Korla 830011, China 1. Department of Earth Sciences Zhejiang University 310027 Hangzhou China 2. Tarim Oil Field Company PetroChina Company Limited 830011 Korla China

Paleomagnetic and rock magnetic studies on samples of 18 sites from the Creta- ceous marine sedimentary rocks in the Tongyouluke section, Akto County, southwest Tarim, China show that the magnetic carriers of the Lower Cretaceous are dominated by hematite with some magnetite, while the magnetic carriers of the Upper Cretaceous are characterized by a combination of magnetite and titanomagnetite as well as hematite and goethite. Stepwise thermal demagnetization is performed and vector analysis is used to isolate magnetic components, which illustrates a single magnetic component or double magnetic components. The high temperature stable components are dual polarities and pass polarity test, reversal test and consistency test. The overall mean direction of the Lower Cretaceous is D = 27.0°, I = 42.0°, α95=6.5° with pole position at φ = 190.3°, λ=63.1°, dp=4.9°, dm=8.0°. The overall mean direction of the Upper Cretaceous is D = 29.1°, I = 39.4°, α95=11.2° with pole position at φ =190.9°, λ=60.3°, dp= 8.0°, dm=13.4°. Compared with the inclination of the Early Cretaceous from red beds of north Tarim, the contemporary inclination of southwest Tarim is 10.0°±7.8° sharper, but it is still 8.1° ±8.9°, shallower than that of Early Cretaceous basalts in southwest Tarim. Although these pa- leomagnetic data show slightly larger confidence limit, the paleolatitude of the marine Cretaceous tends to lie between that of terrestrial red beds and volcanic rocks.

关键词： Tarim paleomagnetism, Cretaceous, magnetic inclination, red beds, marine sedimentary rock.

试论新闻工作的党性原则——兼谈马克思主义的新闻观

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浙江广播电视高等专科学校学报 2002年第4期9卷 8-10页

作者：沈中岳平湖市广播电视局

新闻的党性原则是工人阶级政党的意志在新闻事业中的集中体现,它是新闻工作的灵魂。新闻的党性原则是一个历史范畴,其内涵总是与党的在每个历史时期的中心任务密不可分,带有鲜明的时代特征。坚持党性原则是新闻工作的性质决定的,是历史... 详细信息

新闻的党性原则是工人阶级政党的意志在新闻事业中的集中体现,它是新闻工作的灵魂。新闻的党性原则是一个历史范畴,其内涵总是与党的在每个历史时期的中心任务密不可分,带有鲜明的时代特征。坚持党性原则是新闻工作的性质决定的,是历史经验的总结。是适应当前国际国内形势的迫切需要。坚持新闻的党性原则,必须在政治上与党中央始终保持一致;坚持正确的舆论导向;高标准地建设好新闻队伍;加强党对新闻工作的领导。

关键词：新闻党性原则马克思主义