东坡矿田主要内生矿床成矿规律     

张方军  陈荣华 《华南地质与矿产》2004,(3):38-42

通过对东坡矿田内各主要矿床的产状要素、赋矿标高、硫、铅同位素、测温资料的研究,发现矿田内不同的矿床类型,有它们不同的递温规律、分带规律、台阶规律和侧伏方向。对这一有规律的地质现象的研究可有效控制矿床,对矿床进行合理评价。  相似文献   

Diagenetic and Mineralization Age of the Hehuaping Tin-polymetallic Orefield, Hunan Province   总被引：6，自引：0，他引：6  

WEI Daofang  BAO Zhengyu  FU Jianming  CAI Minghai State Key Laboratory of Geological Processes  Mineral Resources  China University of Geosciences  Wuhan  Hubei Key Laboratory of Biogeology  Environmental Geology of Ministry of Education  China University of Geosciences  Wuhan  Hubei Yichang Institute of Geology  Mineral Resources  CGS  Yichang  Hubei 《《地质学报》英文版》2007,81(2):244-252

The Hehuaping tin deposit is a large deposit found in recent years during geological surveys. The discovered tin deposit includes not only rock-alteration type deposits in fault zones, but also deposits developed in interstratified rupture zones between Devonian carbonate rocks (Qiziqiao Formation) and sandstone (Tiaomajian Formation). The finding of tin deposits of the latter type has greatly enriched tin-mineralization types in the famous Nanling polymetallic metallogenetic region and may provide us with a new potential orientation for prospecting of tin deposits in the region. It is commonly believed that the forming of the tin deposits in the Nanling region should be related to the Yanshanian instead of Indosinian granitic magmatism. Systematical zircon U-Pb SHRIMP dating in this paper shows that tin mineralizations have endured at least two stages. The early stage should be related to the intrusion of the main body of the Wangxianling granite, which was emplaced during the Indosinian period with a diagenetic and mineralized age of 224.0±1.9 Ma (MSWD=0.54), and the late stage should be related to the intrusion of Yanshanian granitic porphyry that took place after 142±3 Ma (MSWD=0.5).  相似文献   

Geology,fluid inclusion and stable isotope study of the Yueyang Ag-Au-Cu deposit,Zijinshan orefield,Fujian Province,China     

《Ore Geology Reviews》2017

The large Yueyang Ag-Au-Cu deposit is commonly regarded as a low-sulfidation epithermal deposit in the Zijinshan orefield, Fujian Province, southeastern China. The Ag-Ag-Cu orebodies hosted in the Zijinshan granitic batholith are mainly stratoid and lens in shape, and controlled by a series of NW-trending listric faults with shallow dip angles. Four mineralization stages are recognized on the basis of mineral assemblage, ore fabrics, and crosscutting relationships of the ore veins, namely: pre-ore (pyrite + sericite + quartz ± chlorite), main Cu (chalcopyrite + pyrite + sericite + quartz ± bornite), main Ag-Au (Ag and Au minerals + pyrite + quartz + adularia ± calcite ± apatite ± chalcopyrite ± galena ± sphalerite) and post-ore (quartz ± chalcedony ± calcite) stages. Fluid inclusions (FIs) in the deposit include aqueous liquid-rich (WL-), aqueous vapor-rich (WV-), and minor carbonic (C-) and daughter mineral-bearing (S-) type ones. WL-subtype is the main inclusion type in the Yueyang deposit, accounting for more than 90% in proportion in each stage. Minor WV-subtype inclusions occur in both the main Cu and Ag stages, while the C-type and S-type ones are only observed in the main Cu stage. Fluid inclusion and H-O isotope study indicated that the ore-forming fluid of the main Cu stage is primarily magmatic vapor, which further underwent fluid boiling and mixing with meteoric water, while the ore-forming fluid of the main Ag stage is meteoric water-dominated, and the precipitation of silver and gold was mainly resulted from fluid boiling and the precipitation of other sulfides. On the basis of the aforementioned geological, fluid inclusion and stable isotope studies, we proposed a two-stage model for the Yueyang deposit, including a magmatic vapor-related porphyry type Cu mineralization and meteoric water-related low-sulfidation epithermal Ag-Au-Cu mineralization, although the porphyry Cu mineralization is very limited in scale. The mineralization and exhumation depths of the Yueyang deposit are estimated to be 448‒527 m and 18‒97 m, respectively. By comparison with the exhumation depths of other deposits in the Zijinshan orefield, it is suggested that more epithermal deposits could be found in the southwest of the orefield due to less uplift and exhumation therein.  相似文献   

广西下、中三叠统砾质岩类特征及成因探讨     

张继淹 《南方国土资源》1997,(3)

文章分析论述了广西下、中三叠统砾质岩类所在层位及其特征，并将其划分为水道砾岩、崩塌—滑塌砾岩、沉积混杂岩３种成因类型，探讨了形成环境及其意义，指出它们均是三叠纪时期构造作用的沉积表现。  相似文献   

矿田与矿床构造研究演进态势浅析——纪念В.M.克列特尔教授《矿田与矿床构造》专著问世60周年(中译本58周年)     

童航寿  方茂龙 《大地构造与成矿学》2016,(2):191-200

2016年是前苏联导师、矿田构造学奠基人В.M.克列特尔教授专著《矿田与矿床构造》问世60周年(中译本58周年),草撰此文以兹纪念。В.M.克列特尔教授早在20世纪40年代出版了首部《找矿勘探学》,于1956年又出版了《矿田与矿床构造》。1957年应邀来我国讲学,并为《矿田与矿床构造(中译本)》作序。他的讲学内容被整理成《普查勘探讲话》,并于1958年公开发表。В.M.克列特尔教授的论著在中苏(俄)两国广为应用、影响深远。笔者有幸于1956年师从В.M.克列特尔教授,攻读副博士学位,深受教益。五十多年过去了,回顾矿田构造学的发展历史,以"矿田与矿床构造研究演进态势浅析"为题,将其初步划分为四个阶段:Ⅰ.继承–萌发阶段(1930~1949);Ⅱ.创建–奠基阶段(1950~1969);Ⅲ.应用–发展阶段(1970~1989);Ⅳ.深化–完善阶段(20世纪90年代以后)。Ⅰ、Ⅱ两阶段主要论述В.M.克列特尔、ф.И.沃尔弗逊等前苏联构造学家对矿田构造学研究所做出的重大贡献;Ⅲ、Ⅳ两阶段论述了我国以翟裕生院士为首的研究团队对矿田构造学所做出的创造性贡献。最后,对铀矿田深部找矿研究谈了几点个人看法。  相似文献   

矿田地质学的概念和构造岩相分类     

吕古贤  武际春  朱随洲  赵海  刘维民  李勃辉  罗毅甜  燕军利 《地质论评》2016,62(S1):321-322

矿田系指矿床密集分布,成矿作用集中发育,且在时间、空间和构造建造上具有紧密联系的矿化赋存区段（克列特尔,1956;沃尔弗逊,1966;）,相当于V级成矿区划单元（陈毓川等,1989;朱裕生等,1999）。  相似文献   

胶东大尹格庄金矿田成矿深度构造校正测算     

王宗永  吕古贤  马生明  韩方法  任剑成  刘晶晶  刘智方  张韵佩  杨之利  张亮亮 《地质论评》2016,62(S1):345-346

对地壳深度的研究和探索是近年固体地球科学的前沿课题之一,以往很多方法都是将压力换算为上覆岩石重量再换算为深度的。吕古贤（1982,1995,1996）指出不是只有重力可以产生静水压力,构造力也会产生相应的静水压力,并称后者为“构造附加静水压力”。基于这一理论进展,吕古贤等（1997）建立了“成岩成矿深度的构造校正测算方法”。利用这一方法,本文在大尹格庄金矿田构造蚀变岩显微构造研究和相关应力测算的基础上,对其成矿深度进行了构造校正测算。  相似文献   

重庆芙蓉洞洞穴沉积物δ13C、δ18O特征及意义   总被引：14，自引：0，他引：14  

李廷勇  李红春  李俊云  袁道先  王建力  叶明阳  唐亮亮  沈川洲  叶成礼 《地质论评》2008,54(5):712-720

利用重庆芙蓉洞内各种新老沉积物的δ13C、δ18O以及对洞穴内的滴水、池水和洞外泉水的长期观测结果,发现芙蓉洞内的次生沉积物中氧同位素变化整体一致,处于稳定温度下(16℃)的平衡分馏状态。而且洞内滴水和池水的氧同位素也相当一致,反映了外界大气降水中氧同位素的年平均状态。芙蓉洞内各种沉积物中碳同位素变化范围很大,从0‰~-11‰均有分布。由于芙蓉洞内各种滴水以及池水中溶解无机碳(DIC)的δ13C变化约在-8‰~-11‰,显著偏轻于部分洞穴沉积物中的δ13C。通过研究从洞穴滴水到形成次生化学沉积物这个过程中的可能影响洞穴沉积物中碳同位素变化的因素,例如：洞穴温度、滴水高度和速率、CO2脱气、生物作用、矿物同质异相转换等,同时参考芙蓉洞内连续生长达37 ka的FR5石笋的碳同位素记录,发现以上可能的影响因素都不能完全解释芙蓉洞内次生沉积物中碳同位素的异常偏重现象。虽然芙蓉洞内广泛存在文石与方解石共存的次生沉积物,但是综合分析表明这些沉积物的氧同位素处于平衡分馏状态,可以用来进行古气候研究。不过在利用石笋碳同位素解释古环境变化时需要慎重,特别是在讨论由文石或文石—方解石混合构成的次生沉积物时。  相似文献   

大方五凤井田6含煤段沉积环境及6中薄煤带成因分析     

曹志德  熊孟辉 《贵州地质》2008,25(4)

利用地质报告资料分析了五凤井田6含煤段沉积环境,探讨了首采区内6中煤薄煤带成因,认为6中煤薄煤带是由于砂体的冲刷作用形成的。  相似文献   

秦楼铜金矿成矿控制条件及矿床成因分析     

孙亚力  张立明  张洪洲  刘青 《安徽地质》2008,18(1):38-41

秦楼铜金矿区位于淮北铁铜金最有利的成矿区三铺岩体北接触带东段,以金、铜矿为主,并含有多种金属元素。本文对秦楼铜金矿的矿床特征、成因以及控制因素做了分析与研究。  相似文献