巴颜喀拉山东段及其邻区大地电磁测深成果地质解释

本文主要依据青海省囊歉至大河坝大地电磁测深成果,并结合重力资料对巴颜喀拉及南北两侧地区的壳幔结构进行了地质解释。指出了该区壳幔存在4个明显的低阻层,并简述了它们的形态特征,推断了其地质含意。认为昆中断裂带与昆南断裂带间是一个巨大的构造混杂岩带,影响深度亦很大。推断该区可能存在太古代地层。划出了8条壳幔断裂带,认为昆中断裂应是塔里木—华北板块与华南板块的分界线。     

山东省优势大地构造相划分初步方案

大地构造相是反映陆块区、造山系和叠加造山-裂谷相系形成演变过程中的一套岩石构造组合,是表达大陆岩石圈板块经历离散、聚合、碰撞、造山等动力学和地质构造作用过程而形成的综合产物。根据优势大地构造相的划分原则与沉积岩、火山岩、侵入岩和变质岩建造构造等特征,山东大地构造相可划分为3个相系(Ⅰ级)、4个大相(Ⅱ级)、17个相(Ⅲ级)和51个亚相(Ⅳ级)。     

山东省邹平火山岩盆地铜矿地球物理综合找矿模型及找矿方向

邹平地区是山东省内最主要的铜矿产地和成矿远景区,先后发现了王家庄铜矿和碑楼铜矿,构成了区内典型的次火山岩型矿床系列。该文通过搜集和研究邹平火山岩区以往多年的信息资料,并结合近几年的地质物化探工作及其找矿成果,初步建立了邹平火山岩盆地铜矿的地球物理综合找矿模型,并以此为基础就下一步该区找矿方向进行了分析和探讨。     

ANALYSIS OF DRIVING FORCES ON THE CHANGE OF HISTORICAL FARMLAND USE IN SHANDONG PROVINCE DURING THE QING DYNASTY （1644-1911）

How land-cover has been changed by human use over the last 300 years is one of the five overarching questions guiding the Land-use/Cover Change (LUCC) Science/Research Plan. China has variety of historical docu-ments providing unique data superiority. So the characteristics of farmland area in Shandong Province during the Qing Dynasty (1644-1911) are summarized firstly: 1) the rising trend of farmland area was striking; 2) farmland area had re-markable fluctuation; 3) farmland area per capita decreased dramatically; 4) wasteland reclamation index increased rapidly. Then, the driving forces of farmland area change are analyzed. It is concluded that natural and human factors are jointly influential. Among the driving forces, human dimensions are the main factors of farmland area change,which direct the general tendency of the changes mentioned above. And the natural factors influence the stability of farmland area as well. Variation of the natural factors would act as the major contributory factor to farmland area change during years or periods of abrupt climatic changes, or during the intensive occurring periods of natural hazards.Besides, the passive aspects of human factors, such as war chaos also influenced the fluctuation of the farmland area.This research indicates that it is feasible to study the land-use/cover change by Chinese historical literatures, which has huge potential to provide a comprehensive picture of the growing dominance of human land-use and land-cover pat-terns that can be used in many global change research oroiects.     

ANALYSIS OF DRIVING FORCES ON THE CHANGE OF HISTORICAL FARMLAND USE IN SHANDONG PROVINCE DURING THE QING DYNASTY (1644-1911)

1INTRODUCTIONTheIGBP-IHDP(InternationalGeosphere-BiosphereProgramme,andInternationalHumanDimensionPro-gramme)jointproject—LUCC(landuse/coverchange)isaninterdisciplinaryprogramdesignedtoimprovetheunderstandingofthedynamicsofland-useandland-coverchangeasinputstoandconsequencesofglobalenvironmentalchangeandsustainabledevelopment(CHARLOTTE,2002).Inparticularthedifferentbio-geochemicalmodeling(e.g.theglobalcarboncycle)ac-tivitiesandcomparativestudies,suchasthoseconduct-edbyIGBP-G…     

山东省泰安市大汶口盆地石膏矿资源潜力评价矿产品需求预测及开发建议

汶口盆地石膏、岩盐资源量巨大,已探明石膏资源量约为1.5×10~8t,推断矿产量约450×10~8t。随着国民经济的高速发展,石膏矿产品的消费量会有大幅度增加。预测2010年山东省对探明的石膏矿产需求量约为2.5×10~8t,而截止2000年山东省可采储量约为1.5×10~8t,两者相差10~8t,其勘查工作亟待加强。     

山东曹县地区土壤地球化学特征

山东省曹县地区土壤地球化学调查是按浅层土壤样品1点/4 km~2,深层土壤样品1点/16 km~2。测试N,P,K,Cu,Zn,B,Mo,Mn,F,As,Hg,Pb,Cr,Cd等14种指标。在统计这些指标的表层、深层土壤地球化学特征参数的基础上,对其与世界、全省同类参数的差异进行了分析,并分析了区内表层、深层土壤元素含量的相关性,认为该区表层土壤元素含量的显著特征是高F而低P,Zn,Mo。大部分元素在表层土壤中的含量继承了土壤母质的成分特征,但N,P,F,Hg等受人为活动和污染源的作用在表层土壤中明显富集。     

山东省蓬莱市西南王金矿床地质特征与资源前景

西南王金矿床位于栖霞-蓬莱成矿带内,是蓬莱地区西部比较典型的缓倾斜薄层石英脉型金矿床。矿体受NNE—NE向断裂控制,倾向SE,倾角15°~25°,呈薄层脉状,分布于郭家岭序列罗家单元的斑状中粒含黑云二长花岗岩和谭格庄序列牟家单元的片麻状细粒奥长花岗岩中。该文通过对矿床地质特征与矿体空间赋存规律的研究,认为矿床深部及周边区域仍有较好的资源前景。     

山东省重要地质遗迹自然区划研究

地质遗迹区划是地质遗迹资源保护的基础,该文根据山东省重要地质遗迹资源的空间分异和山东省大地构造二级构造单元,划分出3个地质遗迹大区,再以其自然分布规律、遗迹形成时间、空间、成因和地质构造单元的关联性进一步划分出8个地质遗迹区和24个地质遗迹集中区,从而建立了山东省重要地质遗迹自然区划系统,亦为地质遗迹保护提供了可靠的科学依据。     

台山玉矿物学特征研究

广东江门五邑地区盛产的黄蜡石(简称台山玉),具有色彩绚丽、质地细腻温润、硬度高等特点,从外观看,台山玉与黄龙玉、石英质玉同属于二氧化硅质玉石,外观相似。从结构来说,它们的内部石英粒度是逐渐变化的,并没有一个截然的界限来划分种类,关于台山玉的定名,如何区别台山玉及黄龙玉成了普遍问题。此外,关于台山玉的地质产状、矿床学成因等方面研究较为薄弱。该文利用偏光显微镜、化学分析、红外光谱分析等方法,重点对台山玉的形成,宝石学矿物学性质进行研究与分析,力求给予五邑地区台山玉商业运作当中的理论层面上的支持。