检索结果-南通市图书馆

Aoyitake plagiogranite in western Tarim Block, NW china: Age, geochemistry, petrogenesis and its tectonic implications

引用

Science china Earth Sciences 2006年第11期49卷 1121-1134页

作者： ZHANG Chuanlin1,2, YU Haifeng3, YE Haimin2, ZHAO Yu2 & ZHANG dongsheng4.1. Key Laboratory of Isotope Geochronology and Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 51064., china 2. Nanjing Institute of geology and mineral resources, Nanjing 210016, china 3. Tianjin Institute of geology and mineral resources, Tianjin 300170, china 4. the 2.d regional geological investigation party, xinjiang bureau of geology and mineral resources, changji 83.100, china 1. Key Laboratory of Isotope Geochronology and Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China 2. Nanjing Institute of geology and mineral resources Nanjing 210016 China 3. Tianjin Institute of geology and mineral resources Tianjin 300170 China 4. the 2.d regional geological investigation party Xinjiang Bureau of Geology and Mineral Resources Changji 831100 China

SHRIMPP U-Pb zircon age and geochemical and Nd isotopic data are reported for the Aoyitake plagiogranite in western Tarim Block, NW china. The plagiogranite intruded the Middle Pro- terozoic and Lower Carboniferous with an exposure area of ca. 60 km2 and crystallized at 330.7±4.8 Ma. Rock types mainly include tonalite, trondhjemite and minor amounts of diorite and quartz-diorite. Feldspars in the rocks are dominated by oligoclase-andesine, and minor perthite observed locally. The granites are sodic with Na/K ratios (molar) between 4.and 87. Total REE (50-220 ppm) show a clear positive correlation with SiO2. There is no LRRE/HREE fractionation (LaN/YbN=0.5-1.5), me- dium negative Eu anomalies (δ Eu=0.3-0.6), high Y content and low Sr/Y ratio (~1.0). These granites exhibit relatively juvenile Nd T2dM model ages of 4.0 to 580 Ma and positive εNd(331 Ma) values of 6.23 to 7.65. The aforementioned characteristics are similar to those of ocean island or ocean ridge plagiogranites. However, the regional geology, especially its scale, precludes that the plagiogranite pluton was derived directly from fractionational crystallization of mantle-derived basaltic magma. We interpreted that the primary magma of the pluton might be tonalitic in composition generated by ca. 50% partial melting of the juvenile basaltic crust. The primary magma experienced intensive frac- tionational crystallization, and intruded into the middle to upper crusts to form the granite pluton. In combination with the previous regional {4. data, it is concluded that the plagiogranite pluton was emplaced within the Tarim Block in respond to the Carboniferous continental rifting along the Tianshan orogenic belt.

关键词： western Tarim, Aoyitake plagiogranite, age, geochemistry, tectonic implications.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Reconstruction for the Late Paleozoic Tectonic Evolution of the Tekes daban Area,Western Tianshan Mountains:Evidence from Unconformities

引用

Acta Geologica Sinica(English Edition) 2011年第5期85卷 1127-1133+1135-1136+1134页

作者： LI Yongjun~(1,*),YANG Gaoxue~1,WANG Xiaogang~2,ZHANG Tianji~1,LIU Xiaoyu~1, YANG Mingyi~1 and TONG Liming~2 1 School of Earth Sciences and resources Management,Chang’an University,Xi’an 710054.china 2 No.9 geological Brigade,xinjiang {4. of geology and mineral Exploration and development,(U|¨)rmqi 830000,china School of Earth Sciences and resources Management Chang'an University Xi'an 710054 China No. 9 geological Brigade Xinjiang Bureau of Geology and Mineral Exploration and Development ürümqi 830000 China *Correspondence: Yongjun LI *Correspondence: Corresponding author. E-mail: yongjunl@***

The identification of unconformities is the key to reconstructing tectonic evolution,revealing crust movement and establishing tectonic *** a long time,there were some controversial issues on the episodes of Variscan cycle(especially on the period of Carboniferous-Permian stages) of the Tianshan *** essential questions fall on the numbers and property of unconformities in this area, for example,in the western Tianshan *** research only recognized three or four fold *** regional geological mapping of 1:50000 in the Tekes daban area,western Tianshan have allowed us to characterize the seven unconformities within the Carboniferous-Permian strata and understand its implications for tectonic reconstruction of the Tianshan *** angular unconformities,which indicate that seven tectonic episodes occurred in the Late Paleozoic Period,were identified in this ***,the newly discovered unconformities based on the angle-unconformity between the dongtujinhe and Keguqinshan Formations,and angle-unconformity between the Wulansayi and Wulang Formations,respectively indicates the Tekes episode and Gongliu *** unconformity between the dongtujinhe and Yishijilike Formations is angle-unconformity instead of parallel unconformity indentified by previous research,so the former Bogda ascending can be revised as Bogda ***,these newly identified seven episodes,including the Tekes episode,suggest that there are seven tectonic movements in the Tianshan area at *** has significant implications for reconstruction of the Late Paleozoic tectonics in the Tianshan Area,NW china.

关键词： unconformity episode Late Paleozoic Western Tianshan Mountains

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The possible contribution of a mantle-derived fluid to the Ningwu porphyry iron deposits—Evidence from carbon and strontium isotopes of apatites

引用

Progress in Natural Science:Materials International 2008年第2期18卷 167-172页

作者： Jinjie Yu ,Jingwen Mao,Changqing Zhang Institute of mineral resources,Chinese Academy of geological Science,Beijing 100037,china Institute of mineral resources Chinese Academy of Geological Science Beijing 100037 China

Apatite is a characteristic mineral for the iron deposits in the Ningwu region. Apatite shows a range of d13CPdB values from à9.6& to à0.6&,and most of them with the d13CPdB values distributed in a range of mantle carbon (i.e.,à2& to à9&),except for samples T-06-1 and J-06-3. Apatites in the Ningwu porphyry iron deposits yield a narrow variation range of 87Sr/86Sr values from 0.706326 to 0.707577,similar to those of the volcanic and subvolcanic rocks and higher than that of a typical mantle-derived magmatic apatite (i.e.,about 0.704.),indicating that formation of the apatites was involved with crust material contamination. d13CPdB and 87Sr/86Sr values of the apatite indicate a possible contribution of mantle-derived fluid and material to formation of the Ningwu porphyry iron deposits,supported by regional geology,regional gravities and geochemistry of the volcanic and subvolcanic rocks in the Ningwu region.

关键词： Apatite 87Sr/86Sr ratios Fluid inclusion d13C Mantle fluid and material

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Phylogeography of regional fauna on the Tibetan Plateau: A review

引用

Progress in Natural Science:Materials International 2009年第7期19卷 789-799页

作者： Shujuan Yanga, Hailiang dongb,c, Fumin Lei d a State Key Laboratory of geological Processes and mineral resources, china University of Geosciences, Beijing 100083, china b Geomicrobiology Laboratory, china University of Geosciences, Beijing 100083, china c department of geology, Miami University, Oxford, OH 4.056, USA d Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, china [a]State Key Laboratory of geological Processes and mineral resources China University of Geosciences Beijing 100083 China [b]Geomicrobiology Laboratory China University of Geosciences Beijing 100083 China [c]Department of Geology Miami University Oxford OH 45056 USA [d]Institute of Zoology Chinese Academy of Sciences Beijing 100101 China

The studies of uplift and glaciations of the Tibetan Plateau are summarized, and a series of recent case studies of the endemic species based on dNA sequences are detailed. In general, these molecular data show that all the organisms originated from Early Pliocene to Late Miocene, and then multi-stages of divergence/speciation occurred within each taxa following their original occupation on the plateau, mainly as a result of periodic glacial cycles and geographic isolation. The regional fauna may have undergone several range contractions and expansions during the Pleistocene glaciations. However, the population expansion and refugia may vary in space, time, and extent. The regional fauna of the Tibetan Plateau may be combinations of ancient movement from adjacent zoogeographical regions, speciation in situ, and postglacial colonization from adjacent areas. Geomorphic and climatic changes on the plateau definitely have a remarkable influence on the regional and adjacent biogeographic patterns, and the mechanism is very complex.

关键词： divergence Refugia Postglacial colonization Phylogeography regional fauna Tibetan Plateau

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Response to“discussion on the systematic position of the Early Cambrian priapulomorph worms”

引用

Science Bulletin 2006年第2期51卷 250-256页

作者： HAN Jian1 & HU Shixue2 1. department of geology and Key Laboratory for Continental dynam- ics of the Education Ministry, Northwest University, Xi’an 710069, china 2. Yunnan geological Institute, Kunming 650011, china department of geology and Key Laboratory for Continental dynamics of the Education Ministry Northwest University Xi’an China Yunnan geological Institute Kunming China

due to the combination of complex states of preservation and taphonomies inChengjiang fossils, Huang et al.) expressed different opinions to those of Han et al.) on themorphology and systematic position of the fossil priapulomorph worms (Priapulomorpha) based on theiradditional materials. These diverse opinions are critical in any investigation of the diversity ofthe Introverta in the Cambrian explosion. However, some of their ideas need to be discussed infurther detail.

关键词： Response to discussion on the systematic position of the Early Cambrian priapulomorph worms

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

凡口铅锌矿区含矿系的沉积相分析

引用

岩相古地理 1988年第2期 16-22页

作者：陈耀钦广东地矿局区调大队

凡口特大型层控铅锌矿床位于广东北部,矿体产于中上泥盆统底部碳酸盐岩中。近年来,研究者络绎不绝,已有大量宏观和微观资料证实其属强烈改造的层控矿床(涂光炽等,1984.陈耀钦,1982)。但对含矿系沉积相分析分岐较大,部分研究者认为存在... 详细信息

凡口特大型层控铅锌矿床位于广东北部,矿体产于中上泥盆统底部碳酸盐岩中。近年来,研究者络绎不绝,已有大量宏观和微观资料证实其属强烈改造的层控矿床(涂光炽等,1984.陈耀钦,1982)。但对含矿系沉积相分析分岐较大,部分研究者认为存在叠层藻组成的藻礁;有人认为是由叠层石与层孔虫、珊瑚等组成的混合礁;还有人否认礁的存在。本文仅就这个问题进行讨论。下面按层位自下而上进行相分析,借以研究含矿系沉积环境的演化及矿源层存在的部位。

关键词：灰岩含矿系白云岩亮晶碳酸盐岩沉积相凡口铅锌矿

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Megaclasts from the Carboniferous-Permian Rocks in the Langkawi Islands, Malaysia, and Their Implications

引用

Acta Geologica Sinica(English Edition) 1999年第1期73卷 120-122页

作者： Chen Tingyu Institute of geology 26 Baiwanzhuang Road,Chinese Academy of geological Sciences, Beijing 100037,china Institute of geology 26 Baiwanzhuang Road Chinese Academy of Geological Sciences Beijing 100037 China

The Ninth regional Congress on geology, mineral andEnergy resources of Southeast Asia was held in KualaLumpur of Malaysia in August of 1998. After the Con-gress, the author participated in the {4. fieldexcursion and investigation in the Langkawi Islands,and noted that the Carboniferous-Permian rocks con-tain megaclasts of metamorphic and pegmatitic rocks,which indicate the existence of pre-Carboniferousmetamorphism and magmatism. The observation resultsare as follows:

关键词： Malaysia and Their Implications Megaclasts from the Carboniferous-Permian Rocks in the Langkawi Islands

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

滇中昆阳群大龙口组碳酸盐岩特征及沉积环境标志的初步分折

引用

沉积与特提斯地质 1989年第2期10卷 25-30页

作者：戚学昆云南地矿局区调队

碳酸盐岩的环境分析,近年来正广泛展开,尤其在古生代及以后的碳酸盐岩中,相继建立有不少标准型沉积环境（相）模式。对前寒武纪碳酸盐岩的环境（相）研究则较为落后,故有关的标准环境（相）模式较少。涉及中元古代昆阳群大龙口组（Pt2d... 详细信息

碳酸盐岩的环境分析,近年来正广泛展开,尤其在古生代及以后的碳酸盐岩中,相继建立有不少标准型沉积环境（相）模式。对前寒武纪碳酸盐岩的环境（相）研究则较为落后,故有关的标准环境（相）模式较少。涉及中元古代昆阳群大龙口组（Pt2d）碳酸盐岩的代表性研究,有云南地矿局昆阳群专题研究组（1972）编《滇中东部昆阳群地层划分及对比》,在此前是1:200000区调玉溪。

关键词：碳酸盐岩昆阳群沉积环境微晶灰岩地层划分水平层理碳酸盐沉积物中元古代环境分析滇中地区

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

贵州长顺睦化泥盆—石炭系界线层型候选剖面背景材料

引用

贵州工学院学报 1986年第1期 47-50页

作者：吴祥和贵州省区域地质调查大队

贵州长顺睦化泥盆——石炭系界线层型候选剖面是世界上泥盆——石炭系界线层型剖面各种因素最佳的候选剖面。如被选或国际泥盆——石炭系界线层型剖面,不仅具有学术意义、而具有政治意义。

关键词：国际界限层型泥盆石炭系贵州长顺睦化候选剖面

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

An investigation of deep Electrical Structure of Qiangtang Basin,Xizang(Tibet),china

引用

Journal of Earth Science 1995年第2期14卷 92-96页

作者： Zhang Shengye Wei Sheng Wang Jiayingdepartment of Applied Geophysics, china University of Geosciences, Wuhan 4.0074.hang Xianjue5th Geophysical Prospecting Team of Central South bureau of Petroleum geology , Ministry oj geology and {4. resources, X

In order to study the deep geoelectrical structure and the regional geological structure and detect potential oil and gas areas in Qiangtang basin in northern Xizang (Tibet ), 222 MT soundings were conducted along three N - S MT profiles across the basin .The MT results indicate that the south and north parts of the Qiangtang basin have a good contrast in the deep electri cal structure . In the south Qiangtang , there are generally two high conductivity layers in the crust . The first is at a depth of about 10 - 25 km and possesses a resistivity of about 10 - 80 Ωm .The second ,the high conductivity layer in the lower crust ,is at a depth of about 4. - 70 km with 3 - 50 Ωm .In the north Qiangtang .there is generally one high conductivity layer .It is at a depth of about 10 - 30 km and the resistivity is about 1-60 Ωm . The thickness of the second high conductivity layer in both the south Qiangtang and the Bangong-Nujiang suture is much greater than that of the first .The thickness of the lithosphere is about 110-120 km for the Bangong-Nujiang suture ,115 km for the south Qiangtang and 100-130 km for the north Qiangtang . On the difference of the deep electrical structures of the crust between the south and the north Qiangtang , we believe that it is related to the eastward flow of the crustal substance .

关键词： MT profile Qiangtang basin deep electrical structure crust and upper man-tle high conductivity layer .

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：