光山凉亭金矿地球化学特征及找矿标志

凉亭金矿产于信阳群龟山组上部以绢云石英片岩、碳质绢云石英片岩为主的第四岩性段内，严格受东西向构造破碎带控制。破碎带蚀变强烈、种类繁多，与矿化关系密切的有硅化、绢云母化、褐铁矿化，深部有黄铁矿化等。矿化带原生晕表现为高背景值、强异常的特征。Ａｇ、Ａｓ、Ｐｂ、Ｍｏ、Ｂｉ标型元素与Ａｕ密切相关。本文着重讨论最佳指示元素在不同地层中分布规律、蚀变与矿化富集、原生异常与矿化（体）的关系等，同时建立指示元素的垂直和水平侧向分带序列。     

阴山超大型硫化物矿床形成的有利条件

阴山中元古代成矿带（狼山 渣尔泰山）属于华北地台元古宙巨大成矿带的西段，产有多处硫铁 多金属矿床，一些已经达到超大型矿床的规模。它们形成的时代和地质环境具显著的热水沉积成矿的特征，可与世界中元古代ＳＥＤＥＸ对比。已经判别出成矿盆地及热水通道等。充足的物质来源、巨大的热源、热水系统演化的完整性、成矿盆地极好的封闭性保证了同生期成矿的高强度，造山期的后生作用也有明显叠加 改造作用     

Analysis of the geothermal vortexes triggering the Xingtai earthquake in 1966

ＡｎａｌｙｓｉｓｏｆｔｈｅｇｅｏｔｈｅｒｍａｌｖｏｒｔｅｘｅｓｔｒｉｇｇｅｒｉｎｇｔｈｅＸｉｎｇｔａｉｅａｒｔｈｑｕａｋｅｉｎ１９６６ＭＡＯＣＡＮＧＴＡＮＧ（汤懋苍）ＸＩＡＯＱＩＮＧＧＡＯ（高晓清）ＬａｎｚｈｏｕＩｎｓｔｉｔｕｔｅｏｆＰｌａｔｅ...     

株洲县湾塘—王家洲区段温泉形成机制及发展前景探讨

通过对株洲县湾塘－王家洲区段地层、构造、水文、岩浆岩的研究，探讨了本区温泉的形成机制，根据温泉的特征，将本区温泉分为低温温泉和中温温泉两类；运用水文地质的研究方法对本区的地下热水水质、水温和可供开采有补给保证的地下热水资源量进行了科学的分析计算和概括；从经济和社会效益角角对本区温泉的开发前景进行了探讨。     

Silicalites of Hydrothermal Origin in the Lower Cambrian Black Rock Series of South China

A silicalite bed was found in the hanging wall and foot wall of the sulfide-rich bed of the Lower Cambrian black rock series in South China.Its origin was not described before,On the oxide(SiO2-Al2O3,SiO2-MgO,SiO2-k2o Na2O)diagrams for discriminating silicalites of chemical,biological and volcanic origins(Liu Xiufeng,1991),most of the data points of silicalites fall within the areas representing silicalites of chemical and volcanic origins.On the Al-Fe-Mn diagram for discriminating silicalites of hydrothermal and biological origins(Yamamoto,1987),the data points fall within the areas representing silicalites of hydrotermal and hydrothermal-biological origins.On the SiO2-Al2O3 diagram for discriminating silicalites of hydrothermal and hydrogenous origins(Bonatti,1975),the data points mostly fall within the hydrothermal area.The ratios of SiO2/Al2O3,SiO2/(K2O Na2O),SiO2/MgO,and K2O/Na2O in the silicalites stand between those of volcanic sediments and of seafloor hydrothermal sediments.The total amount of rare-earth elements in the silicalites is low;the North american Shale-normalized REE patterns decline leftward with obvious negative Ce anomaly.The trace elements Mo,Zn,As,Sb,Se,U,and Ba are higher than those in non-hydrothermal sediments and U/Th≥1.The present authors think that the silicalites are derived from seafloor hot brines which had attracted elements from igneous rocks.     

腾冲现代热泉系统硅华的矿物学特征及其地质意义

云南腾冲是中外著名的地热区，区内火山岩浆地热活动强烈，水热显示形式多样，有温泉，热泉，沸泉，水热蚀变岩石，泉华等。其中硅华为较高温水热活动产物。新硅华以非晶质硅胶和蛋白石为主，含有少量的玉髓和石曲英；老硅化以玉髓和石英为主，含有硅胶和蛋白石。     

Assessment of Fatigue Strength of An Offshore Floating Production and Storage Unit

The procedure of assessment of structural fatigue strength of an offshore floating production and storage and offloading unit(FPSO) in this paper. The emphasis is placed on the long-term prediction of wave induced loading, the refined finite element model for hot spot stress calculation, the combination of stress components, and fatigue damage assessment based on S-N curve.     

Structure of the Malpelo Ridge (Colombia) from seismic and gravity modelling

Wide-angle and multichannel seismic data collected on the Malpelo Ridge provide an image of the deep structure of the ridge and new insights on its emplacement and tectonic history. The crustal structure of the Malpelo Ridge shows a 14 km thick asymmetric crustal root with a smooth transition to the oceanic basin southeastward, whereas the transition is abrupt beneath its northwestern flank. Crustal thickening is mainly related to the thickening of the lower crust, which exhibits velocities from 6.5 to 7.4 km/s. The deep structure is consistent with emplacement at an active spreading axis under a hotspot like the present-day Galapagos Hotspot on the Cocos-Nazca Spreading Centre. Our results favour the hypothesis that the Malpelo Ridge was formerly a continuation of the Cocos Ridge, emplaced simultaneously with the Carnegie Ridge at the Cocos-Nazca Spreading Centre, from which it was separated and subsequently drifted southward relative to the Cocos Ridge due to differential motion along the dextral strike-slip Panama Fracture Zone. The steep faulted northern flank of the Malpelo Ridge and the counterpart steep and faulted southern flank of Regina Ridge are possibly related to a rifting phase that resulted in the Coiba Microplate’s separation from the Nazca Plate along the Sandra Rift.     

套式PCR检测斑节对虾白斑症病毒(WSSV)

解剖患白斑症斑节对虾的鳃组织 ,制备成不同稀释倍数的模板 ,对其进行白斑症病毒 (WSSV)的 PCR扩增 ,结果显示所建立的套式 PCR的灵敏度大约为一步 PCR的 10 4 倍 ;对感染病毒后不同时期的斑节对虾进行 PCR检测 ,发现感染早期经一步 PCR检测为 WSSV阴性的样品 ,套式 PCR的检测结果为阳性 ;对发病虾塘中的几种甲壳类动物进行 PCR检测 ,发现经一步 PCR检测为阴性的长臂虾、秉氏厚蟹和褶痕相手蟹等宿主 ,套式 PCR的检测结果为阳性。表明所建立的 WSSV套式 PCR检测法较普通的一步 PCR有更大的应用价值和意义     

Source rock characteristics and biostratigraphy of the Lower Silurian (Telychian) organic-rich shales at Akyaka, central Taurus region, Turkey

The Akyaka section in the central Taurus region in the southern part of Turkey includes the organic matter and graptolite-rich black shales which were deposited under dysoxic to anoxic marine conditions in the Early Silurian. A biostratigraphical analysis, based on graptolite assemblages, indicates that the sediments studied may well be referable to the querichi Biozone and early Telychian, Llandovery. A total of 15 samples have been subjected to Leco and Rock-Eval pyrolysis and graptolite reflectance measurements for determination of their source rock characteristics and thermal maturity. The total organic carbon content of the graptolite-bearing shales varies from 1.75 to 3.52 wt% with an average value of 2.86 wt%. The present Rock-Eval pyrolytic yields and calculated values of hydrogen and oxygen indexes imply that the recent organic matter type is inert kerogen. The measured maximum graptolite reflectance (G_Rmax %) values are between 5.04% and 6.75% corresponding to thermally over maturity. This high maturity suggests a deep burial of the Lower Silurian sediments resulting from overburden rocks of Upper Paleozoic to Mesozoic Upper Cretaceous and Middle-Upper Eocene thrusts occurred in the region.