轻量土-支挡结构联体模型在陡坡回填路基中的模拟应用研究

在陡坡上修筑回填路基过程中,由于普通回填土具有高压缩性、自重大等特点,用其作为回填路基会对陡坡稳定性带来较大不良影响。以深圳龙岗某公路边坡为实例,采用Abaqus软件对陡坡路基及挡土墙进行受力数值模拟计算,探究陡坡路基分别为回填轻量土及普通回填土两种工况下路基受力变形对其边坡土体及挡土墙稳定性的影响,分析比较其墙体应力-应变及位移变化。模拟结果表明,边坡的坡脚土层一与土层二交界处以及挡土墙与土体接触部位的土体,在普通回填土状态下,这两处土体出现破坏;而在轻量回填土状态下,其塑性应变区域没有贯穿整个滑动面;陡坡路基挡土墙在普通填土状态下最大应力为165kPa,其墙体位移为100.3mm,抗滑稳定系数与抗倾覆稳定系数分别为1.45和2.51;回填路基换填为轻量土体后,土体最大应力为133kPa,整体位移约减小了87mm,其抗滑稳定系数与抗倾覆稳定系数分别为1.64和3.01。通过两种工况下模拟结果的对比分析,表明轻量土应用在陡坡路基回填中,和常规填土相比,既可以提高斜坡安全性,也可以显著降低支挡结构压力,具有较高的工程应用价值。     

用现代地层学方法判别冈瓦纳大陆的北界

在深入研究1:100万“改则幅”和“日土幅”区调中大量原始资料和青藏高原生物地理区系与地壳演化的基础上,用现代地层学方法,重点研究羌塘地块和唐古拉地块的属性及冈瓦纳大陆的北界。笔者首先排除了推覆构造对建立古大陆边缘造山带原地岩系地层层序的严重干扰,对羌塘地块和唐古拉地块的地层层序进行了重建,提出了羌塘地块古大陆边缘现代地层学格架的演化模式。羌塘地块古大陆边缘有两个不同属性而又相互关联的地层体,现今呈一西一东的分布格局,向洋(古特提斯洋)一侧为以深水砂泥复理石和放射虫硅质岩为主的沉积组合类型,向陆一侧为以浅水碎屑、碳酸盐为主的沉积组合类型。从而证实了古特提斯洋存在一个向羌塘地块古大陆边缘倾斜的俯冲消减带。它导致羌塘地块古大陆边缘活化造山运动,并于中二叠世末期与唐古拉地块碰撞,形成晚海西褶皱带。探讨了不同时期不同地块骨骼同位素的演变特征及其成因解释。论述了羌塘地块生物地理区系的发生、发展、消亡与羌塘地块同冈瓦纳大陆分裂、向北漂移(导致新特提斯洋形成)及同唐古拉地块碰撞(导致古特提斯洋消亡)的板块活动关系。     

West Pacific and North Indian Ocean Seafloor and Their Ocean-Continent Connection Zones: Evolution and Debates

The Indian Ocean and the West Pacific Ocean and their ocean-continent connection zones are the core area of "the Belt and Road". Scientific and in-depth recognition to the natural environment, disaster distribution, resources, energy potential of “the Belt and Road” development, is the cut-in point of the current Earth science community to serve urgent national needs. This paper mainly discusses the following key tectonic problems in the West Pacific and North Indian oceans and their ocean-continent connection zones (OCCZs): 1. modern marine geodynamic problems related to the two oceans. Based on the research and development needs to the two oceans and the ocean-continent transition zones, this item includes the following questions. (1) Plate origin, growth, death and evolution in the two oceans, for example, 1) The initial origin and process of the triangle Pacific Plate including causes and difference of the Galapagos and West Shatsky microplates; 2) spatial and temporal process, present status and trends of the plates within the Paleo- or Present-day Pacific Ocean to the evolution of the East Asian Continental Domain; 3) origin and evolution of the Indian Ocean and assembly and dispersal of supercontinents. (2) Latest research progress and problems of mid-oceanic ridges: 1) the ridge-hot spot interaction and ridge accretion, how to think about the relationship between vertical accretion behavior of thousands years or tens of thousands years and lateral spreading of millions years at 0 Ma mid-oceanic ridges; 2) the difference of formation mechanisms between the back-arc basin extension and the normal mid-oceanic ridge spreading; 3) the differentials between ultra-slow dian Ocean and the rapid Pacific spreading, whether there are active and passive spreading, and a push force in the mid-oceanic ridge; 4) mid-oceanic ridge jumping and termination: causes of the intra-oceanic plate reorganization, termination, and spatial jumps; 5) interaction of mantle plume and mid-oceanic ridge. (3) On the intra-oceanic subduction and tectonics: 1) the origin of intra-oceanic arc and subduction, ridge subduction and slab window on continental margins, transform faults and transform-type continental margin; 2) causes of the large igneous provinces, oceanic plateaus and seamount chains. (4) The oceanic core complex and rheology of oceanic crust in the Indian Ocean. (5) Advances on the driving force within oceanic plates, including mantle convection, negative buoyancy, trench suction and mid-oceanic ridge push, is reviewed and discussed. 2. The ocean-continent connection zones near the two oceans, including: (1) Property of continental margin basement: the crusts of the Okinawa Trough, the Okhotsk Sea, and east of New Zealand are the continental crusts or oceanic crusts, and origin of micro-continent within the oceans; (2) the ocean-continent transition and coupling process, revealing from the comparison of the major events between the West Pacific Ocean seamount chains and the continental margins, mantle exhumation and the ocean-continent transition zones, causes of transform fault within back-arc basin, formation and subduction of transform-type continental margin; (3) strike-slip faulting between the West Pacific Ocean and the East Asian Continent and its temporal and spatial range and scale; (4) connection between deep and surface processes within the two ocean and their connection zones, namely the assembly among the Eurasian, Pacific and India-Australia plates and the related effect from the deep mantle, lithosphere, to crust and surface Earth system, and some related issues within the connection zones of the two oceans under the super-convergent background. 3. On the relationship, especially their present relations and evolutionary trends, between the Paleo- or Present-day Pacific plates and the Tethyan Belt, the Eurasian Plate or the plates within the Indian Ocean. At last, this paper makes a perspective of the related marine geology, ocean-continent connection zone and in-depth geology for the two oceans and one zone.     

The paleotectonic and paleogeography reconstructions of the Tarim Basin and its adjacent areas (NW China) during the late Early and Middle Paleozoic

Tarim Basin is the large, very complex, oil-bearing basin in China, surrounded by the Tianshan–Beishan, West Kunlun and Altyn Tagh mountain belts to the north, south, and southeast, respectively. Understanding the processes and evolution of this complex superimposed basin, especially with respect to the effects of single tectonic movements, is a difficult challenge, which concerns the tectonic and dynamic interrelationships between the basin and the orogenic belts during the different stages of the Paleozoic in the Paleo-Asian and Tethyan tectonic systems and for the evaluation of the resource potentials in Tarim Basin. In this study, we focused on 3-dimensional, basin-scale structural architecture and the properties of two regional unconformities that occur within the basin and its adjacent areas. Here, we outline the structural deformations underlying the unconformity, the structural architecture styles and the distributions of the unconformity, and the stratigraphic sequence and nature of the sedimentary rocks immediately overlying the unconformity. During the late Early and Middle Paleozoic tectonic movements, disconformities developed mainly in the northern and the central parts of the basin, and angular unconformities which beneath layers were monocline and faulted-fold deformations developed in the southern, or the southern and northern parts of the basin, respectively. Before the Silurian, the Low Hotian Uplift, the NE-trending faulted-folded belts of the Tangguzibas Depression and the southern Tazhong Uplift underwent intense deformation related to SE–NW-directed tectonic compression. In addition, the NE-trending faults in the Tangguzibas Depression developed during periods of activity on the South Altyn Tagh Fault. The structural deformation, as well as the depositional facies, formed in response to the subduction and closure of the South Altun Ocean and West Kunlun–Kudi Ocean, and the resulting collisional orogeny. Prior to deposition of Upper Devonian sediments, structural deformation and erosion occurred in two marginal parts of the basin. The extent and intensity of deformation on the NE-trending faults in the Tangguzibas Depression were also reduced, whereas the NE-trending folds developed in the Manjiaer Depression. The Tabei Uplift experienced uplift and deformation. The closure of the North Altun Ocean and the eastern part of the South Tianshan Ocean with south-subduction may be the main driving forces for the tectonic activity. Extensive areas in the northern and southern margins of the basin were uplifted and denudated by orogenic activity as a prelude to the molasse basin that developed in the early Late Devonian in the northeastern and southeastern parts of the basin. The structural architecture of the unconformities reveals the geometry and dynamics of the basin–orogen system in single tectonic movements.     

我国凹凸棒石黏土开发利用研究中实行循环经济的途径

针对我国凹凸棒石黏土开发利用现状、存在的主要问题和循环经济的要求,分析探讨了我国凹凸棒石黏土开发利用研究中实行循环经济的途径。结果表明,重视凹凸棒石黏土物化性能和有益有害元素的检测、表征与评价,实行绿色设计、清洁生产,提高科技含量,开发环境友好产品,加强和重视矿山综合性开采与资源的合理化利用技术、环境无害化技术、废弃物综合利用技术、矿山复垦生态环境技术等是实行循环经济的重要途径。     

Tectonic and Environmental Evolutions of the Northern Tibetan Plateau Prior to the Collision of India with Asia

Tectonic and environmental patterns and evolution of the present North Tibetan Plateau(NTP) prior to the India collision with Asia is significant to understand the formation of the Tibetan Plateau and its influence on the environment. In this study, we integrated and analyzed the tectonostratigraphy and the special sedimentary layers whose climatic implications are clear in the NTP. Additionally, we stressed the tectonic and environmental events and their evolutions from the Mesozoic to the Early Cenozoic. Our results show that four tectonic phases, which sequentially took place during the Triassic, Jurassic, Cretaceous and Paleogene, played an important role on the formation of the North Tibet. The climate was basically dry and hot from the Triassic to the Eocene and became dry and cool since the Oligocene in this region. The climatic evolution was characterized by a transition from a wet and hot phase during the Triassic- Middle Jurassic, to a dry and hot phase during the Late Jurassic- Eocene. Both phases encompassed 5 wet and hot periods followed by 5 dry and hot climate events, respectively. In addition, we found that the tectonic deformation and the climatic conditions were spatially and temporally different. In detail, in the regions north of the PaleoTian Shan and Paleo-Qilian Mts. the tectonic deformation and climatic condition were stronger and wetter than in regions south of the Paleo-Tian Shan and Paleo-Qilian Mts. during the Late Triassic – Jurassic. Whereas in the Cretaceous, the tectonic movement was intensive in the west but steady in the east, and climate was dry in the south but wet in the north of NTP. The formation of the tectonic and climatic patterns in NTP were the consequence of either global climate change or regional tectonics, including the Paleo-Asian Ocean closure and the Qiangtang block, Lhasa block and India plate collision subsequently to Asia. Furthermore, the regional tectonic events occurred before any global climate change and drove the climatic change in the NTP.     

北京平原区中更新世以来的孢粉组合及其古气候意义

通过对北京平原区3个孔（顺义高丽营GZK1孔、昌平马池口CHZK1孔及大兴DZK1孔）的孢粉资料进行研究和对比,分析了北京平原区中更新世以来的气候变化,并将其划分为8个阶段：第1阶段气候较寒冷干旱,第2阶段气候温暖湿润,第3阶段气候温凉较湿,第4阶段气候温暖较干旱,第5阶段气候较寒冷干旱,第6阶段气候特征为早期暖湿,晚期温凉干旱,第7阶段气候较寒冷干旱,第8阶段气候温和湿润。     

基于生态保护的宁夏天然绿洲生态需水研究

以适宜的生态目标与生态建设规模为目标,以水资源合理利用为核心,利用遥感(RS)、地理信息系统(GIS)等技术,研究了宁夏绿洲的生态演变和生态需水问题。在分析宁夏绿洲的生态意义、生态现状及流域水资源状况后,探讨了生态演变和生态需水的相关理论,提出了宁夏绿洲生态演变研究的总思路、绿洲生态需水的概念、界定绿洲可持续发展规模,对宁夏生态需水计算提出现状思路和方法。     

智能钻井技术研究现状

针对海陆两相复杂油气资源的开发利用,以及在复杂地质条件下,钻井工程遇到的一些非均质性、不确定性难题,迫切需要借助人工智能、大数据、机器学习等高端信息科学技术,为智能钻井技术与装备的发展带来了契机。阐述了智能钻井系统及其基本组成,主要包含现场地面智能控制平台、数据测量通信控制网络系统、井下智能导向钻井系统以及远程实时智能控制中心系统。系统总结了国内外智能化钻井装备的发展现状,包括智能钻机、智能钻杆、智能钻头、智能钻探分析平台,提出了智能导向钻进技术、智能取心技术、智能钻井液技术、微小井眼钻井技术、无人化钻探的智能化发展潜力。在新一轮的能源革命与工业变革的背景下,钻井技术装备与新兴信息技术的加速融合,将促进钻井技术装备向更加智能化、无人化的方向发展,实现钻井作业全流程自动化。智能化钻井装备与技术的应用,能够提升钻探效率和安全性,降低对环境的影响。与此同时,全面推进智能钻井技术装备及配套软件创新与迭代优化,加快高端智能化平台建设,不断提高其对勘探开发的支撑保障能力。本文的系统论述,以期能给中国智能化地质钻探的科研攻关和技术发展提供一定的参考与启发。

     

中国地球深部结构和深层动力过程与主体发展方向

地球深部结构、构造与大陆动力学研究在地球科学领域中占有重要地位。地球深既是资源、能源形成和演化的场所,又是地震灾害的策源地。它涉及了当今众多相邻学科的发展与成就,故对地球本体的认识在不断深化,特别是地球深部物质与能量的交换的深层动力过程。本文在阐述我国20世纪,主要是20世纪下半叶以来地球深部结构与构造研究主体成就的基础上,依据当今该领域在全球范围内的发展趋势,探讨了21世纪初、中吉的发展导向,并提出了某些战略重点。基于这样的前提,文中着重讨论了以下6个问题：①地球深部结构与大型动力学研究的意义、主题与目标;②地球物理深部地震探测揭示的地壳和上地幔的复杂性;③岩石圈内的大型滑脱构造和地震“孕育”的深部环境;④地球内部地震波传播速度分布与各向异性;⑤地球深部结构、构造与大陆动力学;⑥21世纪初,中叶地球深部与大陆动力学研究的发展战略重点。     

云南德钦日因卡滑坡孕灾背景及形成机理

云南德钦地区位于青藏高原南延部位横断山纵谷地带,多数村镇海拔在3000 m以上,地质构造复杂,岩体破碎,滑坡、崩塌、泥石流等地质灾害频发、易发,属于"三区三州"内典型的高海拔贫困区。通过在该区域内开展地质灾害调查与监测,查明了高海拔贫困山区的地质灾害分布特征和成灾机理。以日因卡滑坡为例,采用"空-天-地"一体化技术,结合滑坡研究区的工程地质条件,现场调查分析滑坡潜在失稳机理与滑坡运动特征,围绕地质灾害调查评价、监测预警、应急防治等体系开展工作,得到几点认识：①滑坡失稳与地表降水、冰雪融水、冻融循环作用及切坡建房等人类工程活动密切相关;②根据滑坡变形特征,概化其孕灾失稳过程,即前缘局部滑动阶段→蠕滑-拉裂阶段→整体滑动阶段→铲刮覆盖阶段;③基于分析澜沧江流域滑坡灾害的发育特征,总结了此类滑坡的成灾模式,并针对性地提出了"三区三州"高海拔贫困区内地质灾害的防治措施和建议,为贫困区科学防灾减灾提供了技术支撑和科学依据,切实保障了贫困群众的生命财产安全。     

我国水文资料整编和数据库技术发展综述

水文是水利和国民经济建设与发展重要的基础工作。经过整编的水文资料是国家重要的基础信息资源之一, 它被广泛应用于防汛抗旱、水工程规划设计、水资源管理与开发利用、水环境保护、水科学研究及其他国民经济建设。长期以来,水文资料为我国水利和国民经济建设与发展提供了科学决策依据。随着经济社会发展和人民生活水平不断提高,对控制水旱灾害、水环境监测与保护、水土保持与生态、水资源管理等方面要求越来越高,对水文资料分析处理、存储、应用服务要求也相应提高。本文主要从技术角度,对我国水文资料整编主要技术方法和水文年鉴发展进行了总结与分析;对水文数据库有关技术标准制定、水文数据库建设成就进行回顾;同时结合水文信息共享和应用服务需求,对相关技术发展进行了展望。     

构造-流体-成矿系统及其动力学的理论格架与方法体系

综述了构造流体与成矿系统及其动力学的研究进展、趋势, 初步提出构造-流体-成矿系统及其动力学的理论格架与方法体系.突出构造和流体在成矿中的关键作用, 强调多种组成与多重作用过程耦合和套合的整体性及其综合效应, 并以这一理论为指导, 提出将构造-流体-成矿系统及其动力学作为一个整体, 从流体与岩石-构造环境相互作用及构造-流体演化的角度探讨成矿系统的形成过程和动力学特征, 遵循实践→认识→再实践→再认识的循序渐进原则, 在多学科综合研究的基础上, 以宏观整体性认识为指导, 深入解析代表性典型中观成矿系统时-空轨迹的规律性特色本质, 具体指导微观成矿作用过程及机理的研究, 实现研究的系统性、完整性和定量化, 从更广、更深层次上认识构造-流体-成矿系统时-空结构及本质属性.      

作物生态位构建的模型及其进化惯量与动量的试验研究

物种生态位构建与其进化关系的研究属于生态位理论的新进展。以半干旱区作物为对象，系统地分析了生态位内涵的发展及生态位构建机理，研究了作物种与环境变化间协同进化的特殊规律，提出用作物生态位的适合程度测定其进化惯量，用现实生态位对其中心点的偏离程度测定进化动量，并建立了相应的数学模型，进行实例的计算分析，主要结果有：①作物种的生态位构建机制，从进化尺度上具体描述了作物通过其新陈代谢、活动与选择来确定自身的生态位（包括部分的产生、毁灭）。基于Hutchinson的生态位理论，建立了 n维超体积生态位的构建模式。②根据进化惯量与进化动量对生态位构建的作用，所进行的实例计算与分析的结果显示：自然选择与人工选择的压力具有异向性，生态位构建导致了进化惯量和进化动量不同的变化规律；作物的传统品种与新品种相比，具有较强的进化惯量与较弱的进化动量；在自然选择与人工选择双重作用下，作物生态位的构建机制有其特殊性。③在作物种进化与可变环境资源的耦合关系分析中，随着土壤养分的增加，作物进化惯量递增而进化动量递减，这从进化角度上揭示了土壤养分变化对作物生态位构建的影响。以上结果可为作物品种选育与农田人工调控提供理论依据。     

环境·灾害与地学

环境与灾害已成为中国社会经济发展的重大制约因素 ,保护环境、减轻灾害需要全社会的努力和科学支撑。环境与灾害的形成主要受两大因素控制 :一是自然变异 ,二是人类社会活动。地球在不停地运动着、变化着 ,致使人类、地球、环境发生日新月异的变化 ,并导致自然灾害的发生。从表面看 ,地圈的运动和变化导致地质环境的变迁和地震及地质灾害的产生 ;水圈的运动和变化导致水环境的变化和水灾害的发生 ;气圈的运动和变化导致气候环境的变化和气象灾害的发生 ;地球表层系统和生物圈的运动和变化导致生态环境的变化和生物灾害的发生。然而 ,从深层次看 ,由于地球是一个开放的自组织系统 ,各个圈层自身运动变化的同时 ,彼此也在发生着物质和能量的交流 ,各个圈层的运动与变化受控于全球运动与全球变化 ,并受太阳及其它天体运动和变化的影响。由此看来 ,地球各个圈层的环境与灾害的产生都不是孤立的现象 ,而是彼此相关 ,形成环境灾害系统 ,并作为地球系统的一个分支 ,属于全球变化的一个组成部分。基于这一认识 ,环境与灾害应当是地学研究的新命题。     

南通通州湾工程地质条件分析

依托海陆域钻孔岩芯资料,结合南通通州湾区域地质、工程勘察资料,分析了南通通州湾基础地质条件、各土层工程地质结构特征、岩土物理力学参数与不良地质体分布情况,讨论了地面沉降、潮流通道稳定性等因素对工程建设的影响,在此基础上对南通通州湾工程地质适宜性进行评价。指出通州湾工程建设需要考虑地面沉降影响,并注意软土及易液化砂土造成的不均匀沉降和局部砂土液化;潮流通道基本保持稳定,但围堤、引桥建设可能改变局部冲淤平衡,建议加强冲淤监测。     

汤原断陷古近系剥蚀量恢复及原型盆地构造格局

汤原断陷构造复杂,后期改造强烈,原型盆地认识不清,导致原始沉积沉降中心不明确,制约了油气勘探的进展。本文从剥蚀量计算入手,分别采用镜质体反射率（R_o）法和地层趋势法,对宝泉岭组、达连河组及新安村组的地层剥蚀量进行计算,结合地震及构造特征,并利用地质建模技术恢复了不同时期的原型盆地形态,通过计算恢复认为：新安村组时期,原始厚度最厚发育在东部边界断裂下降盘,沉积沉降中心被断陷中部低凸起分为南北两个部分,此时期沉积沉降中心位于断陷东部边界断裂中段;达连河组时期,早期的两个沉积沉降中心逐渐合并为一个,断陷西部、南部出现规模较小的沉降带,最厚处依然位于东部断裂带下降盘,而沉积沉降中心迁移至东部边界断裂北段;宝泉岭组时期,早期的两个沉积沉降中心完全合并为一个,断陷西部的沉降带规模扩大,形成一东一西的两个主要沉积沉降中心,沉积沉降中心由一个变为两个。在此基础上,明确了原型盆地格局形态及不同时期沉积沉降中心分布及迁移过程。     

深覆盖层上面板堆石坝应力变形特性研究

结合实测资料和有限元方法分析建于深覆盖层地基上面板堆石坝的应力、变形特性。数值计算中采用邓肯-张E-B模型模拟覆盖层地基和坝体的应力、变形行为,同时采用无厚度接触面模拟面板和坝体以及防渗墙和地基之间的相互作用。整理和分析工程实测资料并与数值计算结果进行对比分析,重点分析坝体和防渗结构的力学行为以及面板堆石坝和地基之间的相互作用。比较分析表明,大坝最大沉降和压应力分别发生在坝体底部和覆盖层中,覆盖层对坝体及防渗结构的应力、变形特性具有显著影响,应力、变形实测值与数值计算结果吻合较好,说明数值计算结果的有效性。在此基础上,分析了覆盖层上面板堆石坝分期填筑和筑坝速度对坝体和防渗结构应力变形的影响。结果表明,分期填筑引起坝体较大不均匀沉降和复杂的应力状态,但一定程度上可以改善防渗墙的应力变形特性;较快的坝体填筑速度容易引起坝体较大的前期应力和后期沉降,不利坝体的施工和运行。     

杭州湾钱塘江两岸全新世以来的古植被及古气候研究

根据杭州市三个钻孔的孢粉资料对杭州市地区全新世以来的植被和古气候演变进行讨论。这三个钻孔分别位于钱塘江两岸的三盈村(HZ1)、新街三星(HZ2)和下沙镇市场(HZ3),笔者对其进行了孢粉样分析和地层年代学研究。研究结果表明,该区自晚更新世晚期以来的植被演化可以划分为4个阶段:第一阶段为针叶林,气候温凉较湿,海平面低于现今海平面;第二阶段为针叶林或针阔叶混交林,气候温和较湿,海平面接近现今海平面;第三阶段为针阔叶混交林,枫香、榆花粉明显增多,气候温暖较湿,出现高海面;第四阶段为针叶林,气候暖和较湿,海平面接近现今位置。其中第一阶段为末次冰期,第二、三、四阶段为全新世。根据第三阶段的孢粉组合特征、岩性特征以及微体化石可知,全新世中期的气候比较适宜,气候温暖湿润。     

青藏高原西南部塔若错湖泊沉积物记录的近300年来气候环境变化

以青藏高原西南部塔若错的34cm浅湖芯为研究对象,对其沉积物样品进行总有机碳、无机碳、总氮、微量元素、正构烷烃含量及碳氮比等多项指标的分析测定。采用过剩210Pb和137Cs计年法对该湖芯进行了定年和沉积速率研究,获得了近300年的连续湖泊沉积环境序列。在明确了各指标气候环境指示意义的前提下,综合对比分析湖芯中各项气候环境指标,并结合定年结果重建了塔若错湖区近300年来的气候环境变化。结果表明：塔若错湖区气候环境变化可分为3个明显阶段：早期为1705～1778年,该地区气候环境温暖湿润,湖区植被广泛发育;中期为1778～1860年,湖区处于小冰期末次阶段,气候环境寒冷而湿润,植被发育受阻;后期为1860年至今,为小冰期结束后偏暖干化时期。其中,后期又可分为3个亚阶段：1860～1924年,湖区气候环境稍暖且干旱,植被稍有发育;1924～1969年,湖区气候环境呈现偏冷干特点,植被发育暂缓;1969年至今,湖区气候回暖,环境干旱化有所缓解,植被开始逐渐发育。在气候冷暖变化上,该湖芯记录与古里雅冰芯记录和青海湖湖泊沉积记录都有较好的可对比性,只是在起讫年代上存在一些差异。