期刊文献+
共找到11篇文章
< 1 >
每页显示 20 50 100
Timing and Processes of Ore Formation in the Qingchengzi Polymetallic Orefield, Northeast China: Evidence from 40Ar/39Ar Geochronology 被引量:4
1
作者 WANG Yinzhi WANG Fei +2 位作者 SHI Wenbei YANG Liekun WU Lin 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2020年第3期789-800,共12页
The Qingchengzi orefield is a large polymetallic ore concentration area in the Liaodong peninsula,northeastern China,that includes twelve Pb-Zn deposits and five Au-Ag deposits along its periphery.The ore-forming age ... The Qingchengzi orefield is a large polymetallic ore concentration area in the Liaodong peninsula,northeastern China,that includes twelve Pb-Zn deposits and five Au-Ag deposits along its periphery.The ore-forming age remains much disputed,which prevents the identification of the relationship between the mineralization and the associated magmatism.In this paper,we quantitatively present the feasibility of making ore mineral 40Ar/39Ar dating and report reliable 40Ar/39Ar ages of lamprophyre groundmass,K-feldspar and sphalerite from the Zhenzigou deposit.Direct and indirect methods are applied to constrain the timing of mineralization,which plays a vital role in discussing the contribution of multistage magmatism to ore formation.The low-potassium sphalerite yielded an inverse isochron age of 232.8±41.5 Ma,which features a relatively large uncertainty.Two lamprophyre groundmasses got reliable inverse isochron ages of 193.2±1.3 Ma and 152.3±1.5 Ma,respectively.K-feldspar yielded a precise inverse isochron age of 134.9±0.9 Ma.These four ages indicate that the mineralization is closely associated with Mesozoic magmatism.Consequently,regarding the cooling age of the earliest Mesozoic Shuangdinggou intrusion(224.2±1.2 Ma)as the initial time of mineralization,we can further constrain the age of the sphalerite to 224–191 Ma.These new and existing geochronological data,combined with the interaction cutting or symbiotic relationship between the lamprophyre veins and ore veins,suggest that the Pb-Zn-Au-Ag mineralization in the Qingchengzi orefield mainly occurred during three periods:the late Triassic(ca.224–193 Ma),the late Jurassic(ca.167–152 Ma)and the early Cretaceous(ca.138–134 Ma).This polymetallic deposits are shown to have been formed during multiple events coinciding with periods of the Mesozoic magmatic activity.In contrast,the Proterozoic magmatism and submarine exhalative and hydrothermal sedimentation in the Liaolaomo paleorift served mainly to transport and concentrate the ore-forming substances at the Liaohe Group with no associated Pb-Zn-Au-Ag mineralization. 展开更多
关键词 40Ar/39Ar dating mineralization ages MAGMATISM qingchengzi orefield MESOZOIC
下载PDF
Lower activity time constraint on the ore-controlling Erdaogou fault in the Qingchengzi orefield of the Liaodong Peninsula,NE China
2
作者 Yan Zhao Yuewen Feng +4 位作者 Peng Zhang Linlin Kou Zhongzhu Yang Shenghui Li Wei Wang 《Acta Geochimica》 EI CAS CSCD 2022年第2期267-274,共8页
The Erdaogou fault,also known as the 101 fault,comprises the most important NE strike component in the ore-controlling system in the Qingchengzi orefield,Liaodong Peninsula.Due to the poor outcrop conditions in the fi... The Erdaogou fault,also known as the 101 fault,comprises the most important NE strike component in the ore-controlling system in the Qingchengzi orefield,Liaodong Peninsula.Due to the poor outcrop conditions in the field,the Erdaogou fault lacks activity time constraint.We demonstrate the constraint activity time of the fault since we observe a lamprophyre that was cut through by the Erdaogou fault in the Taoyuan area,central to the Qingchengzi orefield.Zircon grains from the lamprophyre dyke exhibit typical oscillatory zoning and yield weighted mean U–Pb age of 223.8±1.1 Ma(MSWD=1.5).The lower activity time limit of the Erdaogou fault is thus first constrained as 224 Ma or so and is correlated with the crystallization age of the Xinling and Shuangdinggou plutons within the orefield.Taking previous mineralization studies into consideration,a Triassic tectonic-magmatism-mineralization model is approved in the Qingchengzi orefield. 展开更多
关键词 The Erdaogou fault LA-ICP-MS U-Pb dating Activity time The qingchengzi orefield Liaodong Peninsula
下载PDF
辽宁青城子铅锌多金属矿田晚三叠世岩浆岩年代学、地球化学及地质意义 被引量:42
3
作者 段晓侠 刘建明 +5 位作者 王永彬 周伶俐 李永贵 李斌 张壮 张作伦 《岩石学报》 SCIE EI CAS CSCD 北大核心 2012年第2期595-606,共12页
辽宁青城子铅锌矿田产出在辽东裂谷凹陷带,是中国北方重要的铅锌金银多金属矿田。研究表明,矿区内发育的以双顶沟黑云母二长花岗岩和新岭花岗岩为代表的晚三叠世花岗质岩浆事件,应与本区的矿化作用密切相关。LA-ICPMS锆石U-Pb定年结果... 辽宁青城子铅锌矿田产出在辽东裂谷凹陷带,是中国北方重要的铅锌金银多金属矿田。研究表明,矿区内发育的以双顶沟黑云母二长花岗岩和新岭花岗岩为代表的晚三叠世花岗质岩浆事件,应与本区的矿化作用密切相关。LA-ICPMS锆石U-Pb定年结果显示双顶沟岩体侵位时间为224.2±1.2Ma。双顶沟岩体岩石化学组成呈现SiO269.07%~71.31%,K2O3.53%~5.22%,Na2O3.87%~4.14%,属于钙碱性岩石系列。Al2O3为12.46%~14.48%,A/CNK<1,具有准铝质特征。微量元素数据显示稀土总量较高,轻重稀土元素之间强烈分馏,[(La/Yb)N=35.43~79.01,LREE/HREE=23.09~35.10],Eu负异常不明显(δEu=0.68~0.97)。富集大离子亲石元素Rb、Th、K、Pb等,而亏损高场强元素Nb、Ta、P、Ti等。具有高Sr,Ba含量,低的Y,Yb含量特征,属于具有类似埃达克质亲和性的I型花岗岩,具有高Nb/Ta(18.4~21.2),上述岩石地球化学特征,表明其岩浆源区残留固相矿物组合中包含可观的石榴子石和金红石,可能起源于加厚下地壳的部分熔融,并可能存在与幔源基性岩浆混合作用。推测扬子和华北板块深俯冲过程中板片断离可能是诱发与成矿有关岩浆的地球动力学原因。 展开更多
关键词 锆石U-PB年代学 埃达克质岩石 同碰撞花岗岩 辽宁青城子矿田
下载PDF
辽宁姚家沟钼矿床辉钼矿Re-Os同位素年龄测定及其地质意义 被引量:14
4
作者 方俊钦 聂凤军 +2 位作者 张可 刘勇 徐备 《岩石学报》 SCIE EI CAS CSCD 北大核心 2012年第2期372-378,共7页
本文对青城子矿田姚家沟钼矿床中的8件辉钼矿样品进行Re-Os同位素分析,所获辉钼矿的模式年龄值为166.1±2.3Ma~169.1±2.5Ma,等时线年龄为168.8±3.9Ma(MSWD=1.12),代表流体成矿年龄,结合姚家沟花岗岩体已有的年代学数据,... 本文对青城子矿田姚家沟钼矿床中的8件辉钼矿样品进行Re-Os同位素分析,所获辉钼矿的模式年龄值为166.1±2.3Ma~169.1±2.5Ma,等时线年龄为168.8±3.9Ma(MSWD=1.12),代表流体成矿年龄,结合姚家沟花岗岩体已有的年代学数据,我们推测姚家沟地区可能存在多期次岩浆侵入,姚家沟钼矿床与168.8±3.9Ma的岩浆侵入活动有关。结合区域成矿地质背景,我们推断早中侏罗纪时期,姚家沟钼矿床可能受古亚洲洋闭合的影响,是华北板块与西伯利亚板块后碰撞造山阶段构造-岩浆作用及相关流体活动的产物。 展开更多
关键词 RE-OS同位素年龄 辉钼矿 成矿时代 姚家沟钼矿床 青城子矿田
下载PDF
辽宁青城子矿田高家堡子银矿成矿流体特征及地质意义 被引量:8
5
作者 赵岩 张朋 +3 位作者 吕骏超 张森 寇林林 杨志军 《地质与勘探》 CAS CSCD 北大核心 2015年第3期441-450,共10页
高家堡子银矿是产于辽宁青城子矿田内的大型银矿床。利用从该矿床所采集的含银石英脉及脉状铅锌银矿石样品,对矿床成矿流体进行了详细显微测温、激光拉曼光谱、群体包裹体成分及氢氧同位素测试研究。结果表明高家堡子银矿存在纯液相及... 高家堡子银矿是产于辽宁青城子矿田内的大型银矿床。利用从该矿床所采集的含银石英脉及脉状铅锌银矿石样品,对矿床成矿流体进行了详细显微测温、激光拉曼光谱、群体包裹体成分及氢氧同位素测试研究。结果表明高家堡子银矿存在纯液相及水盐气液两相流体包裹体;流体包裹体显微测温揭示水-盐气液两相流体包裹体均一温度为122℃~202℃,主要集中在122℃至185℃之间;成矿流体盐度为1.05%~9.34%Na Cleq;激光拉曼测试显示包裹体主要由H2O、CO2、CH4等组成,与流体包裹体气相成分测试结果基本一致;成矿流体液相分析显示Na+、Mg2+、Ca2+、K+、Cl-、SO2-4为主要成矿流体的阴阳离子。结合矿田内已有H-O同位素测试分析结果,认为青城子矿田内金银矿成矿流体来自岩浆活动驱动的热液系统。高家堡子银矿为岩浆热液叠加早期沉积变质大理岩的浅成低温银矿床,岩浆活动在成矿中起了重要作用。 展开更多
关键词 流体包裹体 成矿流体 成矿机制 高家堡子银矿 青城子矿田 辽宁
下载PDF
辽东半岛青城子矿田典型金矿成因:来自硫、氢、氧同位素的证据 被引量:5
6
作者 赵岩 杨宏智 +3 位作者 杨凤超 张朋 顾玉超 胥嘉 《地质与资源》 CAS 2020年第1期21-28,共8页
青城子矿田是辽宁东部重要的金多金属矿田,成矿作用复杂.选择白云金矿和小佟家堡子金矿进行了硫同位素和氢氧同位素研究.结果显示矿田内小佟家堡子等金矿硫同位素含量为1.87‰~16‰,无明显的塔式分布;白云金矿的硫同位素含量为-10.3‰^+... 青城子矿田是辽宁东部重要的金多金属矿田,成矿作用复杂.选择白云金矿和小佟家堡子金矿进行了硫同位素和氢氧同位素研究.结果显示矿田内小佟家堡子等金矿硫同位素含量为1.87‰~16‰,无明显的塔式分布;白云金矿的硫同位素含量为-10.3‰^+1.9‰.氢氧同位素测试结果显示白云金矿中石英δD含量为-108.3‰^-74‰,δ18O含量为8‰~15.9‰;而小佟家堡子等金矿的石英氢氧同位素分布则较为分散.综合分析认为,小佟家堡子金矿代表了早期金成矿,与变质作用有关;白云金矿代表了晚期金成矿作用;矿田内层状铅锌矿与小佟家堡子等金矿可能是同期成矿事件. 展开更多
关键词 硫同位素 氢氧同位素 青城子矿田 白云金矿 小佟家堡子金矿 辽宁东部
下载PDF
辽宁省青城子铅锌矿田成矿特征与矿床成因探讨 被引量:10
7
作者 沙德喜 刘洪津 李国树 《地质与资源》 CAS 2011年第4期258-264,共7页
青城子铅锌矿成矿受层位、岩性控制.古元古代条痕状花岗岩侵位而引起的穹隆构造及其上覆的层状岩系中的滑脱型韧性剪切带、层间断裂带及中生代岩浆作用、断裂构造对成矿起重要作用.矿床具有"多阶段复成因"特点,经历了3个主要... 青城子铅锌矿成矿受层位、岩性控制.古元古代条痕状花岗岩侵位而引起的穹隆构造及其上覆的层状岩系中的滑脱型韧性剪切带、层间断裂带及中生代岩浆作用、断裂构造对成矿起重要作用.矿床具有"多阶段复成因"特点,经历了3个主要成矿期,即古元古代同生沉积就位成矿期、吕梁变质-变形"重就位"成矿期和中生代构造-岩浆活化"再就位"成矿期.矿床成因属以海底(喷流)热水沉积作用为基础,遭受后期变质变形和热液叠加的广义层控性矿床,即属海底喷气沉积变质-岩浆热液改造型铅锌矿床. 展开更多
关键词 成矿特征 矿床成因 青城子铅锌矿田 辽宁省
下载PDF
Late Triassic Magma Mixing and Fractional Crystallization in the Qingchengzi Orefield,Eastern Liaoning Province:Regional Petrogenetic and Metallogenic Implications 被引量:1
8
作者 Hongjing Xie Yuwang Wang +2 位作者 Dedong Li Guochao Zhou Zhichao Zhang 《Journal of Earth Science》 SCIE CAS CSCD 2021年第1期144-157,共14页
The Qingchengzi orefield is an important Pb-Zn-Au-Ag polymetallic orefield in NE Chi-na.The Indosinian magmatism has formed the Shuangdinggou batholith and the Xinling stock,as well as dikes of quartz monzonite porphy... The Qingchengzi orefield is an important Pb-Zn-Au-Ag polymetallic orefield in NE Chi-na.The Indosinian magmatism has formed the Shuangdinggou batholith and the Xinling stock,as well as dikes of quartz monzonite porphyry and lamprophyre.According to petrographic characteristics,the Shuangdinggou intrusion can be divided into the main suite and the central suite.Zircon U-Pb dat-ing yielded crystallization ages of 215.0-220.9 Ma for these various Qingchengzi magmatic units,which are within analytical error and represent coeval magmatism.The Shuangdinggou main suite contains abundant mafic microgranular enclaves(MMEs)and shows features of magma mixing.Geochemically,the major oxide contents of the MMEs and their quartz monzonite host show well-defined linear frac-tionation trends.The REE and trace element patterns of the MMEs and their host are similar,which demonstrates certain degree of geochemical homogenization between the two during magma mixing.The Shuangdinggou main suite shares similar geochemical characteristics with typical high Ba-Sr gra-nites(Ba=1082 ppm-2051 ppm,Sr=803 ppm-886 ppm),and was likely originated from the mixing between a melt derived from partial melting of the thickened lower crust and the enriched mantle.The central suite was likely formed by fractional crystallization of the main-suite magma.The Xinling in-trusion may represent a branch of the Shuangdinggou intrusion and has the same genesis as the central suite.The quartz monzonite porphyries geochemically mimic the Shuangdinggou main suite,and may also be an epioic facies of the Shuangdinggou intrusion.The MMEs and lamprophyres may have been derived from incomplete magma mixing.Formation of the Pb-Zn and Au-Ag deposits in the Qing-chengzi orefield may have been related to the granite/quartz monzonite porphyries near the Shuangdinggou intrusion,which were formed by magma mixing and fractional crystallization. 展开更多
关键词 qingchengzi orefield Shuangdinggou intrusion magma mixing mafic microgranular enclave(MME) fractional crystallization
原文传递
青城子矿田构造变形结构及其控矿特征 被引量:13
9
作者 刘君 《辽宁地质》 1995年第2期148-157,共10页
通过对青城子矿田构造变形结构分析,以及矿田中构造变形结构在成矿过程中的演化模式的建立,提出了以早期开阔褶皱为基础,晚期构造叠加构成圈闭空间的主体控矿格架,并用其进行成矿预测,指出今后找矿方向。
关键词 青城子 矿田 变形结构 控矿特征 成矿预测
下载PDF
青城子铅锌矿田地质特征 被引量:13
10
作者 王秀福 刘培栋 +2 位作者 杨桂莲 张秀敏 衣欣 《有色矿冶》 2010年第2期2-6,21,共6页
辽东裂谷是大型陆间裂谷,是我国重要的有色金属及贵金属巨型成矿带,青城子矿田是辽东裂谷著名矿床。本文通过对青城子矿田的区域地质背景、控矿地质特征、矿床地质特征及同位素地质、成矿流体进行了全面的详细的研究与阐述,提出了青城... 辽东裂谷是大型陆间裂谷,是我国重要的有色金属及贵金属巨型成矿带,青城子矿田是辽东裂谷著名矿床。本文通过对青城子矿田的区域地质背景、控矿地质特征、矿床地质特征及同位素地质、成矿流体进行了全面的详细的研究与阐述,提出了青城子铅锌矿田的成因,海相火山喷流-厚积-变质-岩浆热液-叠加的再造型。 展开更多
关键词 青城子矿田 裂谷 同位素 稳定同位素 包裹体 矿床成因
下载PDF
青城子矿田东部金矿地质特征及找矿方向 被引量:2
11
作者 栾辉 《有色矿冶》 2014年第4期12-15,共4页
通过对青城子东部各金矿地质特征的研究,以小佟家堡子、林家三道沟金矿床为例,总结了区内金矿床的成矿地质特征,即金矿体主要以层状-似层状分布于盖县岩组下部和大石桥岩组上部层位,富集于各岩性接触地带。提出了小佟家堡子、林家三道... 通过对青城子东部各金矿地质特征的研究,以小佟家堡子、林家三道沟金矿床为例,总结了区内金矿床的成矿地质特征,即金矿体主要以层状-似层状分布于盖县岩组下部和大石桥岩组上部层位,富集于各岩性接触地带。提出了小佟家堡子、林家三道沟等金矿床经历两大成矿期次,属于沉积变质-岩浆热液改造型矿床。明确了以尖山子断裂及其所派生的低序次构造为定位空间、以硅化石墨化等蚀变为找矿标志的主要找矿方向。 展开更多
关键词 金矿 地质特征 找矿方向 青城子矿田
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部