塑性岩体与逆冲构造变形关系讨论——库车坳陷西部实例分析

在冲断构造分析过程中 ,常常把塑性岩体仅仅作为滑脱层看待 ,忽略了一些地区塑性变形与冲断构造变形的复合作用。根据露头、钻井、地震等资料 ,应用平衡剖面等技术对库车坳陷西部的构造变形进行了恢复分析 ,发现库车坳陷西部的下第三系盐、膏、泥等塑性体受重力和构造应力联合作用发生了复杂的变形。以往单纯用冲断构造模式分析其成因机制 ,没能科学地反映中生界与新生界之间的变形缩短量的差异 ,通过塑性体的底辟变形和滑脱变形依存关系的剖析 ,能够恢复库车坳陷西部构造演化过程 ,进而为油气勘探提供指导。     

河南南召水洞岭铜铅锌矿床地质特征及成因分析

通过地质详查和综合研究相结合的手段 ,从水洞岭铜铅锌矿床的地质特征入手 ,分析矿床成因 ,提出矿床属海相火山喷发沉积 -弱改造型的成因观点     

富碱斑岩中超镁铁深源包体岩石的矿物学特征

在云南省鹤庆县六合乡富碱斑岩体中找到超镁铁深源岩石包体，这对于研究富碱斑岩的起源和演化及其成岩成矿作用具有重要意义。本文较系统地研究了深源包体岩石的矿物学特征，揭示该深源包体具有原始上地幔岩在地幔条件下受到一定程度富集地幔流体交代作用改造的特征，具有富集地幔低程度部分熔融属性，为富碱斑岩的成岩成矿演化提供了重要的矿物学依据。     

Geochemical Studies of Sodium Enriched Metavolcanite Series in the Area of Longbohe Copper Deposit,Yunnan Province,SW China：Nd,Sr and Pb Isotopic Characteristics and Chronology

The chronological data obtained by a variety of dating methods have confirmed that the sodium enriched metavolcanite series in the area of the Longbohe copper deposit at Jinping, Yunnan Province, was formed during the Proterozoic (its Pb−Pb isochron age=1595±75 Ma), corresponding to the Dahongshan Group sodium enriched metavolcanites. The Sm−Nd isochron age of 1336±46Ma should represent the time at which this series of volcanic rocks experienced spilitization in response to sodium metasomatism, equivalent to the time of sedimentation of the Ailaoshan Group and Yashan Group rocks. The Rb−Sr ages of the volcanic rocks and the Pb−Pb ages of copper ores have recorded the events of strong dynamic metamorphism and of strong reworking-metallogenesis of copper during the Jinningian period. Similarities in forming age, rock assemblage and isotopic characteristics between the sodium enriched metavolcanite series and the Dahongshan Group sodium enriched metavolcanite series have provided new clues to the exploration of the Dahongshan-type copper deposits in this area. Granted jointly by the National Natural Science Foundation of China (Nos. 49702022, 40073001) and the State 973 Program (No. G1999043215).     

中条山同善天窗铜矿类型及找矿新认识

在总结同善构造—剥蚀窗内成矿地质条件的前提下 ,运用成矿系列理论 ,把区内具有多种表现形式的变基性火山岩型、变砂岩型、大理岩型三大类铜矿分成了八种亚类 ,认为诸类铜矿与区内广泛发育的新太古代基性岩存在着成生联系 ,铜矿的形成经历了一个复杂的过程。早期的海底火山喷发带来的铁、铜、硫等成矿物质 ,经过最初的海水富集、火山活动末期的热液作用富集以及后来区域变质叠加富集进而形成了这一系列矿床。同时提出了新的找矿思路、找矿方法及找矿靶区。     

华北陆块北缘西段中元古代与裂谷作用有关的铁、稀土、多金属矿床特征及成因

华北陆块北缘西段狼山—白云鄂博裂谷系中元古代形成的大型多金属矿床 ,是我国重要的铁、稀土、铜、铅、锌矿产地。矿床为产于沉积岩中热水沉积型多金属矿床。其形成受地层、构造控制 ,与裂谷作用有着密切的关系。裂谷系内外分支的地质环境及矿床矿种不同 ,导致矿床特征及成因具有一定差异。白云鄂博铁、稀土矿床为钾、钠、磷等含量较高的热水沉积型 ,霍各乞铜、铅、锌多金属矿床为与中基性火山岩有关的过渡热水沉积型 ,东升庙和甲生盘等铅、锌多金属矿床为热水沉积型。文中将对上述矿床分别进行论述。     

Practising geographical knowledge: fields, bodies and dissemination

In this article we make a case for a renewed emphasis upon some of the generic, albeit often tacit, spaces of practice that we share across our sub–disciplinary boundaries. In this we seek to emphasize the ways in which everyday actions make up the grander facades of institutional agendas, empirical projects and disciplinary schools of thought. To achieve this we trace the performance of disciplinary contours and identities across three important sites: the field, the body and the act of dissemination. There are, we will argue, significant commonalities that bind us as disciplinary practitioners in terms of how we perform within and across these sites, and indeed, how we join them up through our practices.     

细菌浸铜技术在紫金山铜矿的应用

介绍了生物浸矿技术在紫金山铜矿的应用及在这一过程中发现的一些问题，并提出了有待进一步解决的一些问题。