Formation mechanism of breccia pipe type in Yixingzhai gold deposit

Based on the basic geological features of Yixingzhai gold deposit, the geological features, classification and relation to mineralization of breccia pipes were discussed by surveying the xenoliths and breccia＇s mineral composition, structure and construction, typical mineralization alteration phenomenon on field and microscopic anatomy in breccia pipes. And the ore-controlling mechanism and the formation mechanism of the blasting breccia pipes were investigated. The main conclusion shows that Hewan and Nanmenshan breccia pipes nearby the NW-striking deep fault are shaped earlier, belonging to the acidic siliceous ingredient production of ultra-hypabyssal magmatic in the late magma stage; Tietangdong and Nanmenshan breccia pipes that are shaped latter are the ultra-hypabyssal auriferous fluid production composed mainly of the skarn in the hydrothermal stage after the magma period. Both root in the unified deep magmatic chamber, belonging to differentiation derivatives at different stages in the deep magmatic chamber.     

高韧高强聚酮/聚酰胺66共混物的制备与性能研究

采用熔融共混法制备了聚酮（PK）/聚酰胺66（PA66）共混物,通过扫描电子显微镜、差示扫描量热仪、冲击试验机和电子万能试验机等研究了PK/PA66共混物的形态结构、结晶与力学性能。结果表明,当PA66含量较低时,PA66分散相粒径较小,且分布较均匀,PK/PA66（质量比为80/20）共混物的干态冲击强度达到29.5 kJ/m2,湿态下冲击强度为纯PK的4倍,同时共混物拉伸强度及弯曲模量也明显提高;但当PA66含量较高时,PA66相区尺寸明显增大,PK/PA66共混物的冲击强度呈下降的趋势;PA66的引入会显著降低PK的结晶度。     

基于BP神经网络的湘西金矿成矿预测

从变异函数特征和分形维数特征方面，对在湘西金矿深部新发现的V7和V8矿脉与原有的V1，V2，V3和V4矿脉的成矿特征进行对比研究。采用BP神经网络技术对成矿特征图形进行模糊识别并进行定量化的相似类比研究，最后依据类比的结果对深部盲矿体的成矿富集规律进行预测。研究结果表明：新发现的V7矿脉具有广阔的找矿前景，而V8矿化不稳定。     

湖南郴州铁石垅铅锌矿床地质及硫、铅同位素特征与深部找矿预测

铁石垅铅锌矿床是湘南地区具有代表性的老矿山之一。为确定其成矿物质来源,指导深部找矿,在研究矿床地质特征的基础上,进行了矿石硫、铅同位素分析与研究。数据显示,矿床中方铅矿的δ³⁴S值基本呈“塔式分布”,δ³⁴S_CDT值变化介于-1.48‰～-5.05‰,平均-3.86‰,表明铁石垅铅锌矿床混有一定地层中的有机硫,具有地壳深部硫的来源特征,且越往深部,岩浆硫的来源特征越明显。²⁰⁶Pb/²⁰⁴Pb值介于18.509～18.619,平均18.588;²⁰⁷Pb/²⁰⁴Pb值介于15.697～15.762,平均15.735;²⁰⁸Pb/²⁰⁴Pb值介于38.754～38.982,平均38.891。矿石铅同位素μ值变化范围小,相对集中且较大,显示铅源主要为上地壳物质,可能混染了少量造山带铅,成矿物质来源与岩浆作用关系密切。成矿作用主要发生在燕山期,预测铁石垅铅锌矿床深部存在隐伏岩体和钨、锡矿体。