安徽铜陵矿集区块状硫化物矿床成因模型与成矿流体动力学迁移

根据地质和同位素地球化学特征，建立了铜陵地区赋存于石炭系地层底部的块状硫化物矿床的成因模型；该类型矿床的形成主要与石炭纪海底热水活动有关，属喷流-沉积型(SEDEX)块状硫化物矿床；下伏古生代地层是重要的成矿金属源区，海水硫酸盐是硫化物成矿的主要硫源。成矿热流体循环的动力学数值模拟揭示。该类型矿床底盘岩石中的流体活动和热影响范围主要局限在主排泄通道两侧较小的区域内；温度场和流场决定以沉积岩为容矿岩石的喷流．沉积型块状硫化物矿床底盘岩石中的蚀变和矿化强度不如以火山岩为容矿岩石的块状硫化物矿床。伴随强大深部热流的张性同生断裂是控制喷流一沉积型块状硫化物矿床形成与分布的关键因素。海西期扬子板块北缘的张性构造体制为该时期喷流一沉积型块状硫化物矿床的形成提供了有利的地球动力学环境。     

安徽铜陵地区石炭纪喷流-沉积型块状硫化物矿床成矿过程中流体运移数值模拟研究

对铜陵地区石炭纪喷流 -沉积型 (Sedex)块状硫化物矿床成矿过程中流体运移的数值模拟 ,揭示该类型矿床底盘岩石中的流体活动和热影响范围主要局限在主排泄通道两侧较小的区域内 ;流体运移行为主要表现为海水下渗淋滤底盘岩石 ,最后汇入主排泄通道 ,与沿断裂上升热流体一道喷出海底。温度场和流场决定喷流 -沉积型块状硫化物矿床底盘岩石中的蚀变和矿化强度较弱 ,这是 Sedex型矿床底盘岩石蚀变和矿化强度不如以火山岩为容矿岩石块状硫化物矿床(VHMS型 )的原因。尽管温度场和流场的影响范围较小 ,但在铜陵地区 ,下渗海水从底盘岩石中淋滤出…     

阿尔泰可可塔勒铅锌矿床围岩蚀变及成因

可可塔勒铅锌矿床受火山喷发中心和沉积洼地控制，铅锌沉淀于海进阶段的局限还原卤水池中；矿下存在大型蚀变带，构成成矿流体对流循环过程中的水-岩作用带；后期造山挤压过程使地层和矿体倒转，矿床最终定位于麦兹倒转向斜之北东倒转翼的东南近转折部位。指出该矿床属海底火山喷流沉积改造型块状硫化物铅锌矿床。     

铜陵矿集区蚀变-流体填图与成矿流体系统

为了详细刻画和深刻理解区域流体系统，文章在传统的地质填图方法基础上，针对流体活动性状及其地质记录。提出了一套区域蚀变-流体填图方法程序，并在铜陵地区进行了示范性研究，取得了良好效果。这套“蚀变-流体填图”的方法明确了流体填图的填图对象，填图单位划分理论依据——流体同源性理论。制定了流体系统．流体子系统-流体单元三级填图单元划分方案。在铜陵地区建立了与成矿流体有关的4套流体系统，即海西期喷流沉积流体系统、燕山期岩浆流体系统、燕山晚期中低温流体系统和燕山晚期繁昌火山流体系统，并划分出7个流体子系统和18个流体单元。通过“蚀变-流体填图”掌握了铜陵矿集区成矿流体的空间分布规律，阐述了不同流体系统的成矿特征。     

铜陵地区喷流-沉积块状硫化物矿床

铜陵地区C2+3/D3w层间的块状硫化物具有雏形堆积,断续分布,受基底断裂构造控制的特征,为多旋回的沉积-喷流(Sedex)成矿作用产物,发育有完整的喷出相、通道相、补给带等.它不仅是"矿胚层",更是独立的金、铅锌矿体,具有重要的工业价值.     

论华南喷流—沉积块状硫化物矿床

现代海底喷流－沉积硫化物矿床的发现极大地推动了海底热液成矿理论的发展,也大大地提高了对古代海底喷流块充化物矿术的研究水平。本文指出喷流－沉积是重要的成矿作用,提出喷流－沉积矿床是华南Ｃｕ、Ｐｂ、Ｚｎ、Ｓｎ、Ａｇ、Ａｕ等矿产资源的重要来源,形成了一批超大型矿床,并将华南许多曾被认为属夕卡岩矿床重新确认为喷流－沉积岩床。文章还论述了华南喷流－沉积块状硫化物矿床的特征、分类、时空分布及其成矿特点等问题,提出断裂拗陷带型喷流－沉积块状硫化物矿床是华南具有特色的类型,而陆相断陷盆地中喷流－沉积矿床值得进一步深入研究。     

喷流沉积成矿作用研究的若干问题

研究海底喷流沉积矿床形成和陆源沉积速率，可确定喷流沉积矿床处于上盘蚀变的找矿标志和块状硫化物矿床产出的海底深度。此外还探讨了陆相喷流沉积成矿的可能性。     

内蒙古龙头山多金属硫化物矿床同生重晶石流体包裹体特征——海相热水沉积成因证据

龙头山多金属硫化物矿床位于内蒙古大兴安岭中南段东坡,海西期地槽褶皱带西拉木伦河深大断裂北侧.野外地质研究发现,该矿床主要发育层状和筒柱状两类矿化,两类矿化的产状、蚀变、矿物特征等显示出典型的海底热水沉积成矿作用特征.对与该矿床金属硫化物同生沉积的重晶石进行流体包裹体岩相学研究发现,重晶石中的包裹体反映了热水沉积成矿期快...     

长江中下游成矿带铜陵矿集区层控硫化物矿床成因研究进展

安徽铜陵矿集区是长江中下游成矿带内重要的多金属成矿区,该矿集区具有大规模的成矿作用和多种类型的复杂成矿系统演化,找矿潜力大,研究程度较高。区内广泛发育一系列层状硫化物矿床,其成因问题一直是中国矿床学界争议的焦点之一。文章从成矿年代学、成矿流体来源以及成矿物质来源等方面,对近半个世纪以来国内外学者对该矿集区内层控硫化物矿床成因研究的主要成果进行了初步归纳,并对对铜陵矿集区的成矿规律和成矿机制取得了一些新的认识:①铜陵矿集区的层状硫化物矿床的成矿过程包含海西期海底喷流沉积和燕山期岩浆热液叠加富集两个阶段,但是对于不同矿床的贡献是有差异的,具体到单个矿床需要结合多种方法进行详细分析;②燕山期岩浆热液交代改造、叠加富集成矿作用发生在早白垩世,大约持续20 Ma,峰值在140 Ma左右;③燕山期含矿岩浆从早到晚岩石地球化学上表现出由中基性→中酸性→中性的演化趋势,以岩浆活动高峰期(140 Ma±)的花岗闪长岩成矿规模最大,这种成矿偏好性是否与深部岩浆源区性质有关值得深入研究;④目前关于海西期喷流沉积作用对成矿的贡献的工作很少,期望对其有正确客观的评价。     

滇东南芦柴冲大型银多金属矿床的海底喷流成矿作用沉积旋回划分

芦柴冲矿床位于滇东南砚山县境内,属南岭地区西南端－－滇东南早泥盆世的层控矿带。经野外调研和室内系统研究,发现矿床为典型非火山成因的、严格受沉积相（台盆相区）控制的海底喷流沉积成因矿床。矿床中发育的南北向同生扩张断裂是重要的控盆和控矿构造,是海底喷流成矿的含矿流体运移的通道,它具周期性的振荡运动的特点,导致海底喷流成矿具周期性的沉积旋回。     

Inter-regional correlation of transgressions and regressions in the Cretaceous period

Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous.     

The lamprophyres of Afyon stratovolcano,western Anatolia,Turkey: description and genesis

The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism.     

NONMETALS DEPOSITS

正20140876 Gao Junbo(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China);Yang Ruidong Study on the Strontium Isotopic Composition of Large Devonian Barite Deposits from Zhenning,Guizhou Province(Geochimica,     

METALS DEPOSITS

正20141470 Chai Lu(Shenyang Institute of Geology and Mineral Resources,CGS,Shenyang110034,China);Zhu Qun Distribution of Significant Metal Mineral Resources the in Adjacent Areas of China,Russia and Mongolia(Geology and Resources,ISSN1671-1947,CN21-1458/P,22(5),2013,p.397-402,2 illus.,3 tables,20 refs.)Key words:metal ores,China,Russia,Mongolia     

GEOPHYSICS

正20141944Bao Hanyong(Research Institute of Exploration and Development,Jianghan Oilfield,SINOPEC,Wuhan 430223,China);Guo Zhanfeng Tectonic-Thermal Evolution of the Subei Basin since the Late Cretaceous(Geological Journal of China Universities,ISSN1006-7493,CN32-1440/P,19(4),     

GEOCHEMISTRY

正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3),     

ENVIRONMENTAL GEOLOGY

正20142512Chen Xiaoan(Jiangxi Provincial Research Institute of Soil and Water Conservation,Nanchang 330029,China);Yang Jie Distribution Characteristics and Causes of Collapse Erosion(Journal of Mountain Research,ISSN1008-2786,CN51-1516/P,31(6),2013,p.716-722,2illus.,7tables,14refs.)     

SEISMIC GEOLOGY

正20140644Cao Ying(Earthquake Administration of Yunnan Province,Kunming 650224,China);Wu Xiaoping Research on Structural Stress Field Basing on Focal Mechanism Solutions Data in Sichuan-Yunan Area(Journal of Seismological Research,ISSN1000-0666,CN53-1062/P,36(2),2013,p.165-172,6illus.,2tables,16refs.)     

METALS DEPOSITS

正20140806Cai Jinhui(Wuhan Center of China Geological Survey,Wuhan 420205,China);Wei Changshan Zircon U-Pb Ages of Magmatic Rocks of Dabaoshan Molybdenum-Polymetallic Deposit,Guangdong Province(Geolo-     

EXPLORATION ENGINEERING

正20141251Ban Junsheng(Central Laboratory,Second Geological Team,Henan Provincial Non-Ferrous Metals Geological and Mineral Resources Bureau,Pingdingshan 467021,China);Ren Jinxin Determination of the Magnetic Material Composition in Magnetite Ore