Metamorphism of the Meiziya Formation in Northern Hanyin, Shaanxi Province
-
摘要: 梅子垭组是汉阴北部地区出露面积最大的地层,岩性主要为白云母石英片岩、含碳白云母石英片岩、含石榴子石黑云母变斑晶白云母石英片岩等,石榴子石和黑云母变斑晶在该岩层中普遍发育。该岩组构造变形复杂,经历了多期构造活动和变质变形过程。笔者在野外调查的基础上,通过分析研究区石榴子石、黑云母变斑晶的关系,采用石榴子石-黑云母地质温度计,对该区广泛出露的含石榴子石黑云母变斑晶白云母石英片岩进行研究,得到如下结论:研究区存在3期黑云母和石榴子石,石榴子石变斑晶具有明显的生长环带,而黑云母变斑晶没有环带;研究区变质作用的变质温度范围为介于511~572℃,主要为530~560℃;变质压力范围为0.16~0.84GPa,变质相属高绿片岩相。
-
关键词:
- 石榴子石-黑云母地质温度计 /
- 梅子垭组 /
- 变质作用 /
- 汉阴 /
- 陕西
Abstract: The Meiziya Formation is the biggeststratum exposed in northern Hanyin, which is mainly composed of muscovite-quartz schist, carbon-containing muscovite-quartz schist, and muscovite-quartz schistwith garnet-bearing biotitemeta crystal. Garnet and biotite are widely developed in thisrock stratum. The formation and metamorphism of Meiziya Formation is complex, which has experienced a number of tectonic activity, metamorphism and deformation processes. Based on the field investigation, the relationship between garnet and biotite metacrystal has been analyzed and researched.Using garnet-biotite geothermometer, the widely exposed muscovite-quartz schist with garnet-bearing biotite metacrystal has been studied in this paper. The results show that three periods of biotite and garnet were developed in this studying area, the garnet porphyroblast has obvious growth zoning, but the biotite without any growth zoning. For this studying area, the metamorphic temperatures range from 511 to 572℃, most of them change from 530 to 560℃. Their metamorphicpressures vary from 0.16 to 0.84GPa, and their metamorphic event mainly corresponds to high greenschistface.-
Keywords:
- garnet-biotite geothermometer /
- Meiziya formation /
- metamorphism /
- Hanyin /
- Shaanxi
-
-
吴春明,肖玲玲,倪善芹. 泥变质岩系主要的矿物温度计与压力计[J]. 地学前缘,2007,14(1):144-150. WU Chunming, XIAO Lingling, NI Shanqin. Main Geothermometers and Geobarometers in Metapelites[J]. Earth Science Frontiers,2007,14(1):144-150.
王瑞廷,谭兴华,李福让,等. 石泉县羊坪湾金矿床成矿模式及其找矿模型[J]. 西北地质,2013,46(2):93-98. WANG Ruiting,TANXinghua,LIFurang,et al. MetallogenicModel and Exploration Pattern of YangpingwanGoldDeposit,ShiquanCountry,ShaanxiProvince,China[J].Northwestern Geology, 2013,46(2):93-98.
王民良.石泉羊坪湾金矿床韧性剪切带特征及找矿标志[J]. 西北地质,2007,40(z1):30-36. WANGMinliang.Characteristics of Shear Ductile Zone and Prospecting Criteria in Shiquan Yang Ping Wan Gold Deposit[J]. Northwestern Geology,2007,40(z1):30-36.
李福让,侯俊富,杨弘,等. 陕西石泉县羊坪湾金矿床地质-地球化学特征及金的富集规律[J]. 中国地质,2009,36(1):174-183. LI Furang,HOUJunfu,YANGHong,et al. Geological and Geochemical Characterisitcs and Gold Enrichment Regularity of the YangpingwanGold Depoist in ShiquanCountry,Shaanxi Province[J]. Geology in China, 2009,36(1):174-183.
杨本昭,吴邦朝,王新社.陕西省汉阴县铁佛-汉滨区流芳金矿地质特征及找矿标志[J]. 陕西地质,2005,28(1):12-17. YANG Benzhao,WU Bangchao,WANG Xinshe. Geological Features and ProspeotingIndication of Gold Ore in Liufang area of Tiefo-HanbinDistrict in HanyinCounty,Shaanxi province[J]. Geology of Shaanxi, 2005,28(1):12-17.
刘林,吴景平,杨译,等.陕西石泉-汉阴北部下志留统黑色岩系中的金矿床[J]. 地质与资源,2011,20(4):304-309. LIU Lin,WU Jingping,YANGYi,et al. Gold Deposit in the Lower Silurian Black Rock Series in Northern Shiquan-Hanyin, Shaanxi Province[J].Geology and Resources,2011,20(4):304-309.
张凯,苏会平,李华南,等. 陕西长沟金矿地质特征及找矿标志[J]. 西部探矿工程,2011,23(3):93-96. ZHANG Kai,SU Huiping,LI Huanan,et al. Gold Deposit Geological Characteristics and Prospecting Marks in Changgou Shaanxi[J]. The Western Exploration Engineering,2011,23(3):93-96.
张寿广,魏春昱,杨崇辉. 南秦岭造山带东段的变质作用研究[J]. 地学前缘,1998,5(4):210. ZHANG Shouguang,WEI Chunyu,YANG Chonghui. Metamorphism in the Eastern Part of the South QinlingOrogenic Belt[J]. Earth Science Frontiers,1998,5(4):210.
张俊良,陈高潮,王炬川,等. 陕西安康-石泉北部金矿成矿地质背景浅析[J]. 陕西地质,2013,31(2):47-52. ZHANG Junliang,CHEN Gaochao,WANG Juchuan,et al.Geology of Gold Deposits in Northern Ankang-Shiquan,Shaanxi Province[J]. Geology of Shaanxi, 2013,31(2):47-52.
杜坚. 安康北部志留系金矿地质特征及找矿前景探讨[J]. 中国矿山工程,2014,43(5):39-43. DU Jian. Discussion on the Geological Characteristics and Prospecting Potential of Silurian Gold-bearing in North Ankang[J],China Mine Engineering, 2014,43(5):39-43.
任小华,高航校,李福让,等. 羊坪湾金矿地质特征及成矿模式[J]. 西北地质,2015,48(1):127-136. REN Xiaohua,GAO Hangxiao,LI Furang,et al. Geological Features and MetallogenicModel of YangpingwanGold Deposit[J]. Northwestern Geology, 2015,48(1):127-136.
张国伟,张本仁,袁学诚,等.秦岭造山带与大陆动力学[M].北京:科学出版社,2001. ZHANG Guowei,ZHANG Benren,YUAN Xuecheng,et al. Qinling Orogenic Belt and Continental Dynamics[M]. Beijing:Science Press,2001.
杨兴科,等. 陕西安康汉阴县铁佛-汉滨区流芳志留系岩金矿田构造及快速评价勘查方法研究报告[R]. 西安:长安大学地质调查研究院,2011. YANG Xingke, et al. Gold Ore Field Generation and Distribution as well as the Structure and the Rapid Evaluation of Prospecting Method Study in TieFo-HanbinHanyinCountry,AnkangCity,ShaanxiProvince[R]. Xi'an:Institute of Geological Survey of Chang 'an University,2011.
周喜文,魏春景,卢良兆. 高温变泥质岩石中石榴石-黑云母地质温度计的应用——以胶北荆山群富铝岩石为例[J]. 地学前缘(中国地质大学,北京),2003,10(4):353-363. ZHOU Xiwen,WEI Chunjing,LU Liangzhao. Application of the Garnet-Biotite GeothermometerinHigh Grade Metapelite:Al-rich Rock from the Jingshan Group in North Jiaodong,China.[J]. Earth Science Frontiers (China University of Geosciences,Beijing),2003,10(4):353-363.
何德锋,钟宏,朱维光. 石榴石-黑云母地质温度计在四川拉拉铜矿床的应用[J]. 矿物学报,2008,28(2):127-134. HE Defeng,ZHONG Hong,ZHU Weiguang. Application of the Garnet-Biotite Geothermometer in the Lala Copper Deposit,Sichuan Province[J]. Acta Minerallogica Sinica,2008,28(2):127-134.
张树业,康维国,赵鸿,等.变质岩结构构造图册[M]. 北京:地质出版社,1985:37-521. ZHANG Shuye,KANG Weiguo,ZHAO Hong,et al. Metamorphic Rock Structure Atlas[M]. Beijing: Geological Press,1985: 37-521.
NACHIT H, IBHI A, ABIA E A, Ohoud M B. Discrimination Between Primary Magmatic Biotites,ReequilibratedBiotites and NeoformedBiotites[J]. Comptes Rendus Geoscience, 2005,337(16):1415-1420.
FOSTER M D. Interpretation of the Composition of TrioctahedralMicas[J]. US GeolSurvery Prof Paper, 1960,354B:1-49.
HOLDAWAY M J. Application of New Experimental and GarnetmargulesData to the Garnet-Biotite Geothermometer[J]. American Mineralogist,2000, 85(7-8): 881-892.
MASSONNE H J,SZPUEKA Z. Thermodynamic Roperties of White Micas on the Basis of High-Pressure Experiments in the Systems K2O-MgO-Al2O3-H2O and K2O-FeO-Al2O3-SiO2-H2O[J]. Lithos, 1997,41(1-3):229-250.
计量
- 文章访问数: 2208
- HTML全文浏览量: 0
- PDF下载量: 2763
下载:
