皖浙赣交界莲花山岩体U-Pb锆石年龄及其地质意义

来源 :地质与资源 | 被引量 : 0次 | 上传用户：xulee_jj

【摘要】

：

皖浙赣交界莲花山岩体位处扬子板块东南缘,即扬子板块与华夏板块结合带之东段(江南造山带东段北缘).该岩体侵入于新元古代末期的上墅组(赣东北),岩性主要为正长花岗岩及花斑岩,后期因变质变形作用而发生面理化并具有绿片岩相浅变质矿物组合.地球化学特征指示,莲花山花岗岩很有可能为形成于大陆边缘后造山环境的A2型花岗岩.锆石LA-ICP-MS U-Pb定年结果显示岩体年龄为878±70 Ma,为晋宁晚期的产物.

【作者】

：

刘欣伍月金珊合

【机构】

：

中国地质调查局沈阳地质调查中心,辽宁沈阳110034

【出处】

：

地质与资源

【发表日期】

：

2021年6期

【关键词】

：

江南造山带莲花山花岗岩锆石LA-ICP-MS U-Pb定年地球化学特征岩石成因

下载到本地 , 更方便阅读

下载此文赞助VIP

声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架

论文部分内容阅读

其他文献

Dynamic control for the feed system of a robotic drilling end-effector

Robotic drilling technology for aircraft flexible assembly is challenging and is under active in-vestigation.In this work,a feed system for robotic drilling end-effector is modeled.Two control al-gorithms with different computational complexity are propos

期刊

robotic drillingfeeding systempole-placementmodel reference adaptive

Performance analysis of blockchain for civil aviation business data based on M/G/1 queuing theory

An Ethereum blockchain based on proof of stake (PoS) consensus mechanism is used to achieve the data sharing within the civil aviation service platform for both airport group management and passengers.Considering the Gas consumption of Ethereum,the dynami

期刊

blockchainEthereumproof of stake (PoS) consensus mechanismM/G/1 queuing theor

Study on spiral winding swimming motion control of a slender legless creature model

Through the observation and analysis of the motion trajectory of spiral winding motion for slen-der legless biological creatures in water,V-REP software is adopted to build a dynamic simulator to study on the mechanism of spiral winding swimming (SWS) mot

期刊

V-REPspiral winding swimming (SWS)motion controlslender legless crea-ture (SL

Wedge template optimization and parallelization of depth map in intra-frame prediction algorithms

To reduce the computational complexity and storage cost caused by wedge segmentation algo-rithm,a scheme of simplifying wedge matching is proposed.It takes advantage of the correlation of the wedge separation line of depth map and the direction of intra-p

期刊

3D high-efficiency video coding (3D-HEVC)wedge segmentationsimplified search t

MIPS VZ虚拟化环境中透明大页性能的优化

内存地址翻译一直是影响计算机性能的重要因素之一,在虚拟化环境中由于存在多级地址翻译,这一问题更为突出.使用透明大页(THP)是优化这一问题的常见手段.本文以龙芯3 A4000处理器和KVM虚拟机为实验平台,分析了MIPS VZ环境中虚拟机使用透明大页的性能.发现透明大页在应用中存在分组TLB负载不均衡,使得部分场景中透明大页对性能产生了负面影响.本文对现有KVM内存管理进行了改进.通过在内存管理中增加对分组TLB负载的考量,提升了KVM虚拟机使用透明大页的性能.该方法对其他使用TLB分组结构的处理器也有参

期刊

透明大页(THP)虚拟化MIPS内存管理

CCD signal acquisition and optimal digital denoise technology

To reduce the charge-coupled device(CCD) readout noise and improve the detection ability un-der low illumination and dim targets,a new low-noise CCD signal processing technology-CCD dig-ital denoise-is gradually being employed in aerospace detection and o

期刊

charge-coupled device (CCD)low noisereset noisedigital correlated double samp

Protective effect of compressing arc extinguishing lightning protection device on superimposed light

Traditional lightning protection measures can not solve the problem of superimposed lightning strikes.This paper presents a compressing arc extinguishing lightning protection device,which can solve the problem of superimposed lightning strikes.This device

期刊

compressing arc extinguishingsuperimposed lightning strikesimulationlight-nin

A neural network-based commutation optimization strategy and drive system design for brushless DC mo

An optimized commutation method based on backpropagation (BP) neural network is proposed to resolve the low stability and high-power consumption caused by inaccurate commutation point pre-diction in conventional commutation strategy during acceleration an

期刊

brushless DC motorsenseless controlback electromotive forceneural networkhar

辽宁本溪牛毛岭马家沟组顶部剖面微相分析与沉积环境

牛毛岭马家沟组顶部剖面位于本溪国家地质公园牛毛岭景区的东部.通过对碳酸盐岩的微相分析,恢复了马家沟组顶部剖面沉积环境并总结了沉积环境变化规律.依据标本研究划分出14种微相类型,包括1种风暴岩微相类型、9种缓坡微相类型、3种标准微相类型和1种自定义微相类型.此剖面自下而上划分为3个低能型向上变浅潮缘旋回.旋回一的沉积环境由内缓坡的潮缘或潟湖,至沙滩和沙堤,至潮汐水道的潮缘;旋回二沉积环境由局限或开放的内缓坡,至潮缘的浅潮下带和个别层位的潮间、潮上带;旋回三最为典型,沉积环境由灰色灰岩的中缓坡,至潮缘,再到黄

期刊

碳酸盐岩沉积微相沉积环境马家沟组辽宁省

A switching-based backstepping sliding mode control for space manipulator in presence of gravity var

A novel switching-based backstepping sliding mode control (SBSMC) scheme is devised for the space manipulator exposed to different gravity.With a view to distinct differences in dynamics prop-erties when the operating condition of space manipulator change

期刊

space manipulatormicrogravityswitching systemmulti-Lyapunov functionsbackste

皖浙赣交界莲花山岩体U-Pb锆石年龄及其地质意义

与本文相关的学术论文