陕西宁强巩家河—蒲家沟地区火山岩地质特征及金、银多金属成矿预测

宁强巩家河—蒲水沟地区出露的元古界碧口群为浅变质火山—沉积岩系，火山岩为钙碱性系列的细碧—角斑岩建造，产于岛弧构造环境，火山活动以裂隙式喷溢为主，岩浆演化总体反映为一个大的正向旋回。金、银多金属矿化主要产在火山溢出间歇阶段的短暂喷发所形成的火山碎屑岩夹层中或不同岩性的过渡转换部位。矿化受后期改造富集特点明显。     

构造改造成矿机制：——四川羊石坑汞矿成矿作用探讨

羊石坑汞矿床是位于四川省秀山县境内的大型汞矿床，产于下寒武统清虚洞组碳酸盐岩中，受地层和构造双重控制，并以细脉浸染型为特征而区别于我国其他大型汞矿床。概括了该矿产出的区域地质背景、物质来源和构造控矿特征，通过对不同构造部位矿物、元素及同位素等的分布、分配特征和矿床地质地球化学研究，揭示了成矿物质来自沉积地层，矿源层的形成与同生断裂活动和深部物质加入有关，构造－热液活动对矿源层的改造导致了矿床形成，     

Radiolarian-bearing conglomerate from the Hayang Group, the Kyongsang Supergroup, southeastern Korea

The non-marine Cretaceous Kyongsang Supergroup, which is divided into the Sindong, the Hayang and the Yuchon groups, is widely distributed in southeastern Korea. Radiolarian-bearing pebbles are collected from the conglomerates of the Kumidong and the Kisadong formations of the Hayang Group. The age of radiolarian fossils range from Late Permian to Middle Jurassic. In Korea, Permian to Middle Jurassic marine chert beds are not exposed. The directions of paleocurrents of the Kumidong and the Kisadong formations are mainly from the northeast to southwest. During Cretaceous time, the Mino-Tamba Belt, within which Permian to Middle Jurassic chert beds are exposed, is suggested to have been located northeast of the Kyongsang Basin. The radiolarian faunas of the Hayang Group are similar to those of the Mino-Tamba Belt and other associated Mesozoic accretionary belts in Japan (e.g. the Ashio Belt). The provenance of the radiolarian-bearing pebbles collected from the Kumidong and the Kisadong formations is interpreted to be the Mino-Tamba Belt and other associated Mesozoic accretionary belts in Japan.     

The Araçuaí-West-Congo Orogen in Brazil: an overview of a confined orogen formed during Gondwanaland assembly

The Neoproterozoic Adamastor-Brazilide Ocean was generated during the breakup of the Rodinia supercontinent, and remnants of its oceanic lithosphere have been found in the Brasiliano-Pan African orogenic system that includes the Araçuaí, West-Congo, Brasília, Ribeira, Kaoko, Dom Feliciano, Damara and Gariep belts. The Araçuaí and the West-Congo belts are counterparts of the same Neoproterozoic orogen. The first belt comprises two thirds of the Araçuaí-West-Congo Orogen. This orogen is rather unique owing to its confined nature within the embayment outlined by the São Francisco and Congo cratons. In spite of this, the presence of ophiolitic remnants, and a calc-alkaline magmatic arc, indicate that the basin/orogen evolution comprise both oceanic spreading and consumption. It is assumed that coeval Paramirim and Sangha aulacogens played a key role by making room for the Araçuaí-West-Congo Basin. Sedimentary successions record all major stages of a basin that evolved from continental rift, when glaciation-related sedimentation was very significant, to passive margin. Rifting started around 1.0–0.9 Ga. The oceanic stage is constrained by an ophiolitic remnant dated at 0.8 Ga. If the cratonic bridge that once linked the São Francisco and Congo palaeocontinental regions did not hinder the opening of an ocean basin, it certainly limited its width. As a consequence, only a narrow oceanic lithosphere was generated, and it was subducted afterwards. This is also suggested by orogenic calc-alkaline granitoids occuping a small area of the orogen. Geochronological data for pre-, syn- and late-collisional granitoids indicate that the orogenic stage lasted from 625 Ma to 570 Ma. A period of magmatic quiescence was followed by intrusion of postcollisional plutons at 535–500 Ma. The features of the Araçuaí-West-Congo Orogen suggest the development of a complete Wilson Cycle in a branch of the Adamastor Ocean, which can be interpreted as a gulf with limited generation of oceanic lithosphere.     

论成矿台阶

成矿台阶系指同一成矿区，同一成矿系列的同一类型矿床的主要矿体赋存在相应的标高范围内，湘南－粤北地区，铌钽矿床的成矿台阶为640－980m;石英脉－黑钨矿床600－1400m，石英脉一白钨矿床100－400m，矽卡岩型白钨矿床100－860m;浅源重熔岩浆系列铅锌矿床600－1100m，深源同熔岩浆系列铅锌矿床－200－100m，最深可达－700m;石英脉型锡石矿床650－1400m，锡石－硫化物，蚀变花岗岩型，云英岩型锡矿床450－650m，香花岭，界牌岭锡多金属矿床－200－270m，利用成矿台阶新理念，指导上述矿床的勘查，可以收到事半功倍的探矿效果。     

勘查隐伏矿床的有效方法探讨

湘南地区找矿实践证明，就矿找矿、按成矿模式找矿、用新技术、新方法综合找矿及成矿预测与靶区验证相结合等，是勘查隐伏矿床的有效方法。隐伏矿床的找矿勘查，要以全新的观念和思路，应用新理论、新方法、进行综合研究和预测。     

北大别主簿源花岗岩和片麻岩矿物的

对大别造山带北部主簿源中生代花岗岩侵入体及其围岩片麻岩进行了矿物氧同位素分析，同时对同一样品进行了矿物 Rb- Sr内部等时线定年。结果表明，花岗岩和片麻岩矿物的氧同位素温度大小顺序为：角闪石 >磁铁矿 >榍石 >石英 >黑云母 >长石，遵循缓慢冷却条件下扩散控制的氧同位素交换封闭顺序，指示这些岩石没有受到后期热液蚀变的扰动。根据黑云母-长石-磷灰石-全岩内部 Rb- Sr等时线测定，花岗岩的年龄为 (118± 3) Ma，代表了岩浆侵位冷却年龄；片麻岩的年龄为 (122± 1) Ma，代表了片麻岩受大面积燕山期岩浆侵位热烘烤达到高温同位素平衡后的冷却年龄。因此，矿物之间的氧同位素平衡与否 ,能够对矿物 Rb- Sr体系封闭后平衡状态的保存性以及矿物内部等时线定年的有效性予直接制约。     

赣西卡林型金矿控矿条件及成矿模式

论述了赣西卡林型金矿与基底地层、地层层位、岩性、构造及岩浆岩的关系，金的迁移富集形成与条件，建立了赣西卡林型金矿的成矿模式。     

印尼多岛海沉积记录基本特征与云南古特提斯研究

以新生代印度尼西亚多岛海沉积记录作为典型分析对象 ,对陆 (岛 )海相间结构背景下的沉积作用的主要特征及其构造地理意义进行讨论。各种类型的深水沉积作用在多岛海槛式盆地中多有反映 ,但以浊积和半远洋沉积最为突出 ,典型的远洋沉积仅发育于多岛海外围的开放大洋地区。连续而持久的远洋沉积记录是判别古代洋盆规模的最有效的依据之一。云南昌宁—孟连造山带作为古特提斯多岛洋主洋盆 ,包含的以放射虫硅质岩为代表的远洋记录覆盖的地质历史至少达 130Ma。结合明显的等深流记录、可能的巨大火成区记录、巨量陆屑输入记录等多方面的证据 ,笔者认为 ,云南地区所揭示的东古特提斯的规模远非当代的印尼多岛海可比。对多岛海背景下的若干古海洋学问题也进行了讨论     

湘桂粤赣区域性位场资料的数据处理及其应用

应用位场资料(△g,△T),进行数据处理和图像综合分析技术,圈定隐伏岩体,划分区域构造,提出找矿远景区,为在该区找矿预测提供新的信息.