中石化重庆首次钻获高产天然气 储量有待再评估

新华社消息 日前从中国石油化工集团公司了解到,中石化勘探南方分公司部署在川东南地区的重点探井兴隆1井,完井常规测试获得日产量51．7万m^3高产天然气。目前该地区勘探正在紧锣密鼓地推进,天然气探明地质储量有待进一步勘探评估。     

豫章山传奇

龙泉地处浙西南山区,我国东南地区最高大的山系武夷山系,分仙霞岭山脉和洞宫山脉两支,从境内西南部委迤入境。这里群峰林立,蜿蜒起伏,中山广布,有海拔千米以上的山峰730余座,其中洞宫山山脉的黄茅尖海拔1929米,系江浙第一高峰。     

皖东南地区暴雨环流形势分型

前言 暴雨所引起的山洪。内涝是我区的主要自然灾害之一,不仅对工农业生产造成极大危害,人民的生命财产也受其威胁。暴雨的产生与环流形势关系密切,考虑到在500hPa图上环流形势表现较为复杂,而大气中的水汽和不稳定能量主要集中在对流层的中低     

Geological and Geochemical Characteristics of Early Cretaceous Mafic Dikes in Northern Jiangxi Province, SE China and Their Geodynamic Implications

The development of Early Cretaceous mafic dikes in northern and southern Jiangxi allows an understanding of the geodynamic setting and characteristics of the mantle in southeast China in the Cretaceous. Geological and geochemical characteristics for the mafic dikes from the Wushan copper deposit and No. 640 uranium deposit are given in order to constrain the nature of source mantle, genesis and tectonic implications. According to the mineral composition,the mafic dikes in northern Jiangxi can be divided into spessartite and olive odinite types, which belong to slightly potassium-rich calc-alkaline lamprophyre characterized by enrichment in large ion lithophile elements (LILE) and light rare earth elements (LREE), large depletion in high strength field elements (HSFE) and with negative Nb, Ta and Ti anomalies, as well as 87Sr/86Sr ratios varying from 0.7055 to 0.7095 and 143Nd/r44Nd ratios varying from 0.5119 to 0.5122.All features indicate that the magma responsible for the mafic dikes was derived mainly from metasomatic lithosphere mantle related to dehydration and/or upper crust melting during subduction. Differences in geochemical characteristics between the mafic dikes in northern Jiangxi and the Dajishan area, southern Jiangxi were also studied and they are attributed to differences in regional lithospheric mantle components and/or magma emplacement depth. Combining geological and geochemical characteristics with regional geological history, we argue that southeast China was dominated by an extensional tectonic setting in the Early Cretaceous, and the nature of the mantle source area was related to enrichment induced by asthenosphere upwelling and infiltration of upper crust-derived fluids responding to Pacific Plate subduction.     

青藏高原东南部夏季深对流加热研究

文章利用1948～1999年NCEP／NCAR全球深对流加热率再分析资料和1951～2001年全国160站月平均降水量研究了中国区域夏季深对流加热分布状况，青藏高原东南部夏季深对流加热较强，是潜热释放较多和深对流活动旺盛区域；青藏高原东南部深对流加热率与长江中下游地区降水的相关分析也表明，夏季青藏高原东南部深对流活动对长江中下游地区夏季降水偏多有重要影响，可以为长江中下游地区夏季降水提供水分和能量。     

人命大过天——陆川县防治地质灾害工作略记

2010年夏天,又一个不平静的汛期。台风暴雨交相袭来,山洪浊水肆意横流,桂东南地区有如水乡泽国,山体滑坡、地面塌陷、泥石流交替而来……面对大自然的发难,玉林市陆川县再一次全民动员。他们周密部署,投入重兵,众志成城,以冲天的干劲、扎实的作风及超出过往的付出,夺取了防灾治灾一个又一个的胜利,实现了年初制定的全年防治地质灾害"零伤亡"的目标。     

RESEARCH ON SYSTEM OF FLOOD DISASTER CONTROL AND REDUCTION SUPPORTED BY GIS IN MEDIUM AND SMALL BASINS

Southeast China coastal areas belong to subtropical monsoon climatic zone,thus easily affected by floods resulted from typhoons and rainstorm.Since the areas of river basins are small,rivers flood regulation capacities are low,and therefore flood hazard is grave.In the paper,taking the Yongjiang basin in southeast China as an example,the approaches and methods of geographic information system(GIS) applied to flood disaster control and reduction research on small basin are explred.On GIS help the rainfall-runoff calculation model and the river dchannel flood routing model are developed.And the evaluating flood submerged are and the damage assessment models are built supported by digit elevation models.Lastly the decision support system on GIS supported for flood control in research basin has been set up.This greatly improves flood-proofing decision-making capacities in river basin,and provides valuable information and a mode for flood prevention and reduction in the medium and small basin .Meanwhile,the research indicates that technologies of GIS provide a powerful tool for flood disaster control.     

汶川地震前后典型前兆异常特征分析

详细分析“九五”和“十五”各种前兆数字化和模拟资料,汶川8．0级地震前甘东南地区多个台项如视电阻率、水氡、应变等手段都表现出了异常变化,经震前落实,认为大部分异常变化归因于祁连山地震带的异常反映。针对典型的天水和武都台电阻率的震前、震后资料的变化特征,探讨甘东南地区应力场在汶川地震前后的演化特征。     

南川地区南页1井五峰组—龙马溪组页岩特征与生物地层

南川区块为国内首个页岩气招拍挂区块,生产实践表明该区具有较大的页岩气勘探开发潜力。为了进一步分析南川地区五峰组―龙马溪组页岩气成藏条件,对该区岩芯资料较全的南页1井开展了系统的笔石鉴定和笔石带划分对比,建立了从凯迪阶的Dicellograptus complexus带(WF2带)至埃隆阶上部的Lituigraptus convolutus带(LM7带)连续的生物地层序列。同时利用薄片、有机地化、全岩X衍射、氩离子抛光扫描电镜等分析测试资料和测井资料,对五峰组―龙马溪组下部优质页岩段进行了精细岩石地层划分,发现①-③小层为深水陆棚亚相细粒沉积,富有机质纹层和含有机质纹层发育,海水富营养,古生物繁盛,有机质富集程度高,有机成因硅质含量高,储层物性好,页岩气成藏物质基础和富集条件优于④-⑤小层,是页岩气勘探开发甜点段。与威202井和宁211井生物地层对比表明,宁211井WF2―LM4带页岩气最富集层段沉积速率最快、厚度最大、页岩气成藏物质基础最好,南页1井、威202井沉积速率较慢、厚度较薄、页岩气成藏物质基础略差。     

渝东南地区石牛栏组稀土元素地球化学特征及地质意义

渝东南地区的下志留统石牛栏组作为重要的油气储集层,研究其古环境变化、物质来源及物源区构造背景具有重要意义。本文采用稀土元素总量w(ΣREE)、REE配分模式、以及w(ΣLREE)/w(ΣHREE)、w(La)_N/w(Yb)_N、w(Ce)_N/w(Yb)_N、w(La)_N/w(Sm)_N、w(Gd)_N/w(Yb)_N、δEu、δCe、Ce_(anom)等特征值研究方法,对渝东南下志留统石牛栏组典型剖面的稀土元素特征及古海洋环境和物源进行深入研究。结果表明:石牛栏组灰岩稀土元素总量略低于大陆地壳平均值,轻稀土较为富集,重稀土亏损,铕明显负异常,铈负异常较微弱。w(ΣREE)证实了石牛栏组的沉积水体由浅缓慢变深再急剧变浅的变化过程。Eu负异常、Ce负异常和C_(eanom)值均揭示石牛栏组沉积时期海水具有弱还原性。REE的分异程度反映了石牛栏组从沉积早期到沉积晚期,沉积速率总体降低。稀土元素的比值特征及w(ΣREE)—w(La)/w(Yb)图解表明其物源源自雪峰山隆起,源岩主要为沉积岩。