Effect of Irrigation on Groundwater Dynamic Change in the Typical Irrigated Area of Qinghai Province

Under the influence of the natural and human factors, water table of irri- gated area Changes frequently, but it is mainly affected by irrigation water infiltration replenishment during the irrigation. 5 groundwater observation wells were constructed in experimental plot of the Daxia irrigated area to carry out the experiment of the effect of irrigation on groundwater dynamic change in this research. The results showed that the groundwater stage dynarnic change rule of spring and seedling irri- gation stage in the typical plot was fit to the hydrological geology condition of grade- I terrace of Huangshui river valley. On the whole, lateral canal water direction formed a line effect. The No. 1 and No. 2 observation well were the closest to the lateral canal, which received more supplies, and the water level was the highest; the No, 3 observation well took the second place; The No. 4 and No. 5 observation well accepted least supplies, and the water level was the lowest. The rangeability of water table of spring irrigation period was significantly higher than that of seedling irrigation period, this is mainly due to the difference value of intake water volume and drainage water volume of spring irrigation phase was significantly higher than the seedling irrigation phase.

Rb-Sr and Sm-Nd Isochron Ages of the Dongmozhazhua and Mohailaheng Pb-Zn Ore Deposits in the Yushu area, southern Qinghai and Their Geological Implications

Located on the northeast margin of the Qiangtang terrane between the Jinshajiang suture zone and Bangonghu-Nujiang suture zone,the Dongmozhazhua and Mohailaheng Pb-Zn deposits in the Yushu area of Qinghai Province are representative Pb-Zn deposits of the Pb-Zn-Cu polymetallic mineralization belt in the northern part of the Nujiang-Lancangjiang-Jinshajiang area,which are in the front belt of the Yushu thrust nappe system.The formed environments of these two deposits are different from those of sediment-hosted base metal deposits elsewhere in the world.The authors hold that they were formed during the Indian-Asian continental collision and developed within the fold-thrust belt combined with thrust and strike-slip-related Cenozoic basins in the interior of the collisional zone.Studying on the metallogenic epochs of these two deposits is helpful to the understanding of ore-forming regularity of the regional Pb-Zn-Cu mineralization belt and also to the search for new deposits in this region.The age of the Dongmozhazhua deposit has been determined by the Rb-Sr isochron method for sphalerite residues,whereas the age of the Mohailaheng deposit has been determined by the Rb-Sr isochron method for sphalerite residues and the Sm-Nd isochron method for fluorite.The age of the Dongmozhazhua deposit is 35.0-±0.0 Ma （（87Sr/86Sr）0=0.708807） for sphalerite residues.The age of the Mohailaheng deposit is 32.2±0.4 Ma （（87Sr/86Sr）o=0.708514） for sphalerite residues and 31.8±0.3 Ma （（143Nd/144Nd）o=0.512362） for fluorite with an average of 32.0 Ma.Together with the regional geological setting during mineralization,a possible tectonic model for metallogeny of the Dongmozhazhua and Mohailaheng Pb-Zn deposits has been established.These two ages are close to the ages of the Pb-Zn deposits in the Lanping and Tuotuohe basins,indicating that it is possible that the narrow 1000-kilometer-long belt controlled by a thrust nappe system on the eastern and northern margins of the Tibetan plateau could be a giant Pb-Zn mineralized belt.

A New Discovery on the Deformation Behavior of Shale Gas Reservoirs Affecting Pore Morphology in the Juhugeng Coal Mining Area of Qinghai Province, Northwest China

Objective The Juhugeng mining area in Qinghai Province of northwest China has attracted wide attention among geologists for it hosts typical coal measure gases.The shale gas reservoirs were reformed by intensive structural movements during geological periods,

Zircon and Apatite U-Pb Geochronology and Geochemistry of the Mafic Dykes in the Shuangxiwu Area, Northwestern Zhejiang Province: Constraints on the Initial Time of Neoproterozoic Rifting in South China

Previous studies have shown that there are some ca.770–750 Ma mafic dykes at the western segment of the Neoproterozoic Jiangnan orogen(JO),and they represent post-orogenic magmatism due to orogenic collapse(Wang

Analysis of Outdoor Cultivation of Pepino(Solanum muricatum)in Qinghai Province

[Objectives]This study was conducted to explore the feasibility of planting pepino(Solanum muricatum Ait.)in Qinghai Province,and to understand the cultivation quality and yield in various areas of Qinghai.[Methods]With small fruit type of pepino as the material,four areas in eastern Qinghai were selected to determine the agronomic traits,yield and quality indexes of pepino.[Results]Under the same cultivation conditions,there were some differences in the cultivation status of pepino,but overall,pepino fruit had higher quality.Various physiological indexes were correlated with quality and yield.[Conclusions]This study clarified the specific cultivation situation of pepino in Qinghai Province,and evaluated the quality and yield of pepino,providing strong data support for the promotion and planting of pepino in various regions in the future.

Geochemistry, geochronology and mineralization of the rare-metal granites in the Daping Ta-Nb deposit, Fujian Province, South China

1 Introduction Rare-metal granites are widely distributed in South China.The Daping porphyritic granitic Ta-Nb deposit,located in the Yongding area of south Fujian province,South China,is a large rare-metal deposit recently discovered.Few studies have been made of its petrology,mineralogy,geochemistry,chronology and metallogeny.In recent years,several exploratory drillings have been done in this deposit.These drilling holes,from 380 to 600

Analysis on Prospecting Potential of Tungsten Polymetallic Ore in Haergeng of Gonghe County, Qinghai Province

The discovery of Gonghe County Haergeng tungsten polymetallic deposit is one of the most important tungsten deposits discovered in Qinghai Province in recent years.It has important theoretical and practicalsignificance.1 Regional geological background The research area lies in the northwest edge of

文旅融合视域下皖南国际文化旅游示范区建设路径研究

党的二十大报告中提出要坚持以文塑旅、以旅彰文,推进文化和旅游深度融合发展。国家全域旅游示范区创建工作正持续开展,文旅融合在旅游示范区建设工作中起着至关重要的作用。梳理皖南国际文化旅游示范区建设现状,厘清示范区现有资源优势,分析其所面临的文化传承不力、创新能力欠缺、产业延伸不足、制度框架不全等问题,从保护传承文化资源、凸显文化特色内涵、加快全域旅游发展和提高旅游服务质量4个方面针对性地提出示范区具体建设路径,以期稳步推进示范区建设,助其融入长三角旅游高质量发展,并为文旅融合视域下同类型旅游区建设发展提供参考和指引。

皖南国际文化旅游示范区A级景区空间分布及影响因素

为落实党的二十大报告中区域协调发展的新要求,顺应全域旅游与文旅深度融合新趋势,开展皖南国际文化旅游示范区旅游资源格局的研究,能够为示范区后续开发建设提供思路与导向。借助平均最近邻指数、不平衡指数、核密度、地理探测器等方法,解析示范区内A级景区的空间特征及影响因素。结果表明:示范区A级景区整体分布不均衡,呈现集中分布特征;示范区内A级景区显现“两主、四次”的空间格局,呈现Y字形分布态势;遗产点密度因子驱动力最强,经济发展因素对A级景区空间分布影响程度较大,自然环境因素驱动力较弱;局部自相关分析表明多数因子聚类特征表现明显;交互探测结果表明两种因子共同作用强于单因子作用。

鲁中南山区侵蚀性降雨及典型作物对坡面产流产沙影响研究

为研究降雨量、降雨历时、降雨强度等降雨因素及典型作物对坡面产流产沙的影响,基于K-均值聚类分析法对山东省泰安市东周小流域2014-2020年77次侵蚀性降雨进行分类,并进一步分析不同降雨类型下不同作物产流产沙特征及对各降雨指标的响应.结果表明:①研究区侵蚀性降雨可以分为Ⅰ型(小雨量、短历时、大雨强)、Ⅱ型(大雨量、长历时、小雨强)、Ⅲ型(中雨量、中历时、小雨强)3类.各降雨频率为67.53%,3.9%,28.57%,占研究期内总降雨量的44.2%,14.02%,41.78%.②各径流小区产流和土壤流失量从大到小依次为大豆、裸地、地瓜、花生,花生和地瓜对径流和泥沙的削减效果相对较好.在Ⅱ型条件下,各小区产流产沙量最大,Ⅲ型次之,Ⅰ型最小;但当Ⅰ型和Ⅲ型雨频率较高时,产流产沙量也较大.③对坡面产流产沙影响最大的因素为降雨量,当作物种类不同时,影响次之的因素有所差别.径流对降雨因素的响应程度高于土壤流失量,控制产流发生可在一定程度上有效降低土壤流失量.

青海东部干旱区不同紫花苜蓿品种饲用品质和生产性能比较

为筛选出适宜青海省东部干旱区种植的紫花苜蓿(Medicago sativa L.),促进当地畜牧业发展,本研究对29个紫花苜蓿品种生育期、生产性能和营养品质进行对比分析,并采用灰色关联度分析法对参试品种的各项指标综合评价。结果表明:参试紫花苜蓿均可在青海省东部干旱区完成整个生育期,生育期介于172~174 d间,差异较小。29个紫花苜蓿中‘大业3号’鲜干草产量均为最高;‘西贝’株高超1.00 m,显著高于其它品种(P<0.05);‘佳能’分枝数最多超过15个;‘磐石’粗蛋白含量最高,达21.71%DM;‘MT4015’中酸性洗涤纤维含量均较低;‘MT4015’和‘磐石’相对饲喂为价值较高,显著高于其他品种(P<0.05)。利用灰色关联度综合饲用价值和生产性能进行排序,发现‘磐石’‘大业3号’‘218TR’位居前列,兼顾产量和品质,适宜在该地推广种植。

青海省生态修复关键区识别及修复分区划分

[目的]基于“整体保护、系统修复、综合治理”的治理思路识别生态修复优先空间抑制生态退化,是区域社会—经济协调发展、筑牢生态安全屏障和推进生态文明建设的重要举措。[方法]以青海省为研究区,通过土地利用强度、土地利用重心迁移反映城市化进程,定量评估2005—2020年7项生态系统服务、生态敏感性和生境退化度,提出基于“生态系统服务簇—生态敏感性-生境退化度”识别生态修复优先空间,将内部缺陷和外界胁迫相结合,划定5类生态修复优先区并提出相应修复策略。[结果]青海省2005—2020年产水深度分别为125.1,106.9,80.0,135.4 mm,水源涵养深度稳定在15 mm左右。粮食产量由1.42 t/hm^(2)提升至2.02 t/hm^(2),防风固沙能力由2.42 t/hm^(2)提升至4.59 t/hm^(2),土壤保持能力由85.90 t/hm^(2)下降至65.30 t/hm^(2);青海省生态系统服务簇可划分为生态宜居和谐簇、水土耦合协调簇、生态源地保育簇、自然生态修复簇、防风固沙功能簇5类。基于双变量自相关识别生态恢复优先点结果可知,青海省主要关键生态恢复点和自然生态恢复点面积分别占5.26%和2.55%,其中关键生态恢复点和生态宜居簇增加区域在空间上分布基本吻合。[结论]青海省生态修复优先区集中在生态环境脆弱的西北荒漠地区、高海拔山区、水源地和河流沿岸及人类活动较频繁的河湟谷地和天峻县、兴海-玛多—曲麻莱县一带。

幼儿园推普助力乡村振兴路径研究——基于对青海乡村幼儿园推普现状的调查

语言输入、语言加工、语言输出是语言习得的基本路径。从语言习得的角度看,推普具有社会性,互动生成是语言习得和推普的关键环节。本文立足推普助力乡村振兴的时代背景,以幼儿园教师为关注重点,通过对青海农村幼儿园教师和幼儿及家长互动和习得方式的推普调查、分析,旨在厘清青海农村推普中存在的短板与不足,探索影响与推普效果的内外在因素,并在此基础上提出“一中心三主体三体系内循环外联动”的“133”农村幼儿园推普模型,家园社融合的推普路径助力农村高质量推普。

甘南黄河水源补给区生态保护与建设成效遥感分析

甘南黄河水源补给区是黄河流域重要水源补给生态功能区,也是青藏高原生态屏障的重要组成部分,具有十分重要的生态系统服务功能。长期以来,受自然因素和人为因素的共同作用,生态系统经历了不同程度的退化,并导致水源涵养功能有所减弱。自2000年以来,国家在此开展了一系列生态保护工程建设,生态环境得到恢复和改善。通过对生态系统现状及变化特征的监测,可实现对生态工程实施成效的评价和主要生态问题的识别,有助于提升生态保护规划建设及管护决策的科学性。本研究以多源遥感数据为信息源,在提取2000—2020年生态系统类型与质量参数的基础上,系统分析甘南黄河水源补给区生态系统结构、质量现状和变化特征。结果表明,近20年甘南黄河水源补给区生态系统整体以高盖度植被为主,生态系统状况良好。整体上生态系统结构和质量的多年变化幅度均较小,生态系统基本稳定,生态保护和建设工程取得了明显成效。但局部地区草原退化、沙化和沼泽面积萎缩等生态问题依然存在,生态保护与建设仍处于关键阶段,建议针对生态系统退化区域加大力度实施生态保护和建设工程。

青海浅山地区燕麦豌豆混作模式研究

为寻求能显著提升青海浅山地区生产性能、饲用营养品质和经济效益的燕麦豌豆混作技术模式,文章以5个燕麦和1个豌豆品种为供试材料,按照8:2播量设置5个混作和6个单作处理。通过探索不同处理下的生产性能和营养品质差异,筛选出生产性能、营养品质和总收益均优良的最优混作组合,再设置9个不同混作比例和7个不同混作方式处理,筛选出能稳定实现粮草双高、饲草品质优良、总收益提高的适宜混作比例和混作方式。试验结果表明燕麦“牧王”和豌豆“草原224”混作组合为浅山地区推广的较为优良的禾豆混作组合,在适宜混作比例和混作方式下,可最大程度发挥出优越的生产性能和优良的饲用营养价值,可为青海浅山地区农业结构调整和产业提质增效提供借鉴和推广。

地质背景复杂区的找矿技术组合研究——以青海省柳弯区块状硫化物矿床为例

青海省柳弯区矿集区内块状硫化物矿床是北祁连地区较为重要的海相火山岩型矿床,矿体赋存于次火山岩中,受后期构造破坏,矿体分布规律难以掌握。自20世纪90年代以来,该区多金属矿找矿利用了地、物、化、遥等多种方法手段,涉及该区及周边各种地质工作较多,但未能系统总结不同方法、不同物化探工作在该区铜多金属矿找矿上的应用效果,因此在找矿方面一直未能取得突破。本次研究从分析多金属矿床覆盖层厚度、矿床和矿体地质特征、不同物化探异常特征入手,总结地质背景下矿化体的物化探特征,进一步缩小找矿靶区,并通过钻探深部验证,在下柳沟、弯阳河、下沟老矿段深部发现隐伏矿体,在老矿段之间的空白区圈定了工业矿体,同时在矿区外围的下沟沟脑-苇夏沟一带发现较好的找矿线索。综合分析认为,本区有效的找矿技术组合为重力+激电+地气+可控源+钻探,可为新一轮找矿突破战略行动中“在哪找、怎么找”提供参考。

青海省祁漫塔格牛苦头铅锌矿床氧逸度特征与铅锌成矿作用关系研究

牛苦头矿床位于青海柴达木盆地西南缘、祁漫塔格成矿带中部,属于典型的矽卡岩型铅锌多金属矿床。根据与成矿作用的关系,将牛苦头矿床早-中泥盆世岩浆岩分为成矿岩体与非成矿岩体。为查明该两种岩体的地球化学性质差异,以及岩体氧逸度特征与铅锌成矿作用关系,本文对牛苦头矿床成矿岩体与非成矿岩体开展锆石微量元素和黑云母电子探针分析。结果显示成矿岩体两个样品锆石Ce^(4+)/Ce^(3+)比值区间分别为9.94~227.72(平均值为27.24)、9.79~197.95(平均值为34.13),非成矿岩体两个样品锆石Ce^(4+)/Ce^(3+)比值区间分别为10.08~39.13(平均值25.41)、8.14~33.78(平均值19.16)。成矿岩体锆石Ce/Nd均值分别为8.42和9.87,而非成矿岩体样品锆石Ce/Nd均值分别为8.20和2.69。根据锆石Ti含量计算的锆石结晶温度,成矿岩体锆石结晶温度(平均值分别为700℃和696℃)略高于非成矿岩体(平均值分别为685℃和682℃)。据此推算的锆石绝对氧逸度显示,成矿岩体平均值分别为-17.57和-14.99,略高于非成矿岩体,后者绝对氧逸度平均值分别为-17.76和-22.49。另外,通过黑云母电子探针分析结果推算,成矿岩体的氧逸度、挥发分含量也略高于非成矿岩体。因此,本文认为成矿岩体氧逸度的升高可能更有利于矽卡岩型铅锌矿床的形成。通过与前人资料分析对比,矽卡岩型铅锌矿床成矿岩体的锆石氧逸度明显低于矽卡岩型-斑岩型铜钼矿,而与矽卡岩型钨锡矿相关的花岗岩锆石氧逸度相似。由此认为成矿岩体氧逸度高低对于成矿类型(铜钼、铅锌、钨锡)有显著的限制作用,岩体锆石氧逸度高低可能与地质背景以及源区幔源成分贡献比例有关。

东昆仑清水河东沟钼矿床成矿模式探讨

本文在总结东昆仑清水河东沟钼矿床成矿地质背景和矿床特征的基础上,通过分析矿石的流体包裹体特征,探讨了矿床成因并建立了成矿模式。研究表明,清水河东沟钼矿床是与浅成超浅成斑岩侵入活动有关的斑岩型钼矿床,成矿岩体为二长花岗斑岩,在斑岩及蚀变围岩中发育呈层状、似层状、透镜状钼矿体;辉钼矿多以鳞片集合体状、星点状分布于石英脉体中及岩石裂隙面上,少量以细脉浸染状分布于蚀变岩石中;矿石流体包裹体具有高—低温、低盐度、低密度的特点。清水河东沟钼矿床形成于晚三叠世后碰撞伸展环境,成矿物质来源主要为斑岩岩浆。该研究结果可为进一步开展区域成矿规律研究和找矿勘查工作提供参考。

地质-化探-遥感多元信息找矿在甘肃北山大口子山一带的应用

大口子山位于甘肃省玉门市北侧,区内大面积被第四系覆盖,基岩出露差,传统找矿方法很难取得突破。笔者为获取更多的找矿信息,在研究区选用地质、化探、遥感相结合的方法,有效筛选矿致异常,以提高找矿效果。目前在研究区已发现金矿(化)体5条,砷矿体2条,硅灰石矿体1条,钨矿(化)体4条,综合找矿效果明显。显示出该方法对浅覆盖区及基岩出露差的区域均有较好的找矿效果。

青海省自然保护地空间分布及体系重构探讨

【目的】青海保护着“中国水塔”,是我国西部重要的生态安全屏障和高寒生物种质资源库。研究青海以国家公园为主体的自然保护地体系对于国家公园和自然保护地发展改革具有重要意义,也可为当下以国家公园为主体的自然保护地体系建设提供借鉴。【方法】以青海省7类95处自然保护地为研究对象,采用最邻近指数、核密度指数、空间叠置等方法分析省域自然保护地空间集聚特征和重叠特征,利用数理统计与ArcGIS空间分析技术识别分析全省自然生态空间,并提出自然保护地体系重构路径。【结果】结果表明,研究区自然保护地面积以国家公园、自然保护区和国家级自然保护地为主,数量上风景名胜区、森林公园、湿地公园占据优势,空间分布上与省域自然地理特征相契合,整体呈聚集分布;不同类型的自然保护地存在交叉重叠,涉及重叠的自然保护地52个,占全省自然保护地总数量的54.74%;提出从新建、撤销、归并、拆分、调整范围等5个方面优化空间布局,优化后青海省自然保护地82个,占全省总面积的41.42%,其中国家公园占80.21%、自然保护区占15.38%、自然公园占4.42%。【结论】实现了以国家公园为主体、自然保护区为基础、各类自然公园为补充的新型自然保护地体系,全省重要的生态系统、生物物种、景观遗迹基本得到了有效保护。