Chronology of the Tungsten Deposits in Southern Jiangxi Province, and Episodes and Zonation of the Regional W-Sn Mineralization-Evidence from High-precision Zircon U-Pb, Molybdenite Re-Os and Muscovite Ar-Ar Ages

Previous studies have obtained some petrogenetic and metallogenic chronological data with SHRIMP （sensitive high-resolution ion microprobe） zircon U-Pb, zircon LA-ICPMS （laser-ablation-inductively coupled plasma mass spectroscopy） U-Pb, molybdenite Re-Os isochron and muscovite Ar-Ar methods in southern Jiangxi Province and its adjacent areas. Based on these, the purpose of this paper is to study the petrogenetic and metallogenic ages and their time gap for different genetic types of W-Sn deposits, and thus to research their numerous episodes, zonal arrangement and their geodynamic background. The result shows that the large-scale W-Sn mineralization in southern Jiangxi Province occurred in the middle to late Jurassic （170-150 Ma）, the skarn W-Sn-polymetallic deposits formed much earlier （170-161 Ma）, and all of the wolframite-quartz vein type, greisen type, altered granite type and fractured zone type tungsten deposits formed in the late Jurassic （160-150 Ma）. In one ore field or ore district, greisen type tungsten deposits formed earlier than quartz vein type ones hosted in the endoor exo-contact zone; and quartz vein type hosted in the endocontact zone formed earlier than that of exocontact zone. There is no significant time difference between tungstentin mineralization and its intimately associated parent granite emplacement （1-6 Ma）. They all formed in the same rock-forming and ore-forming system and under the same geodynamic setting. Regionally, rock-forming and ore-forming processes of the W-Sn deposits in the Nanling region （include southern Jiangxi Province, southern Hunan Province, northern Guangdong Province and eastern Guangxi Zhuang Autonomous Region） exhibit numerous episodes. The mineralization in the Nanling region mainly occurred at （240-210） Ma, （170-150） Ma and （130-90） Ma. The tungsten-tin deposits in this region are centered by the largest scale in southern Jiangxi Province and southern Hunan Province, and become small in the east, west, south and north directions. This displays a zonal arrangement and temporal and spatial distribution regularity. Integrated with the latest research results, it is concluded that the W-Sn mineralization in southern Jiangxi Province and its adjacent areas corresponds to the second large-scale mineralization in South China. The Indosinian W-Sn mineralization formed under the extensional tectonic regime between collisional compressional stages, while the Yanshanian large-scale petrogenetic and metallogenic processes occurred in the Jurassic intraplate extensional geodynamic setting of lithosphere extension.

Ethical Implication of Spatial Design of Hakka Enclosed-castled-houses in Southern Jiangxi

The Hakka enclosed-castled-houses in southern Jiangxi are the historical treasure of Hakka culture,and are the material carrier of Hakka traditional excellent ethics.This article combs the historical development of Hakka enclosed-castled-houses from the perspective of design,and explores the ethical implication of respecting ancestors,respecting social rank,and valuing harmony in space design,in order to provide new ideas and basic theoretical support for the protection and inheritance of Hakka enclosed-castled-houses in southern Jiangxi.

Development and Research on Rural Regional Characteristic Sports Tourism Industry: A Case Study of Southern Jiangxi Province

With the hope of providing basis for sound development of rural sports tourism industry in economic less-developed region and the establishment of macro industry policy,this paper demonstrated the selection of development way,space frame and product system of rural sports tourism industry in southern Jiangxi Province by consulting document literature and conducting field research and based on the analysis of social background for the rise of rural sports tourism.

Petrogenesis of early Yanshanian highly evolved granites in the Longyuanba area,southern Jiangxi Province:Evidence from zircon U-Pb dating,Hf-O isotope and whole-rock geochemistry

Early Yanshanian(Jurassic) granitoids are widespread in the Nanling Range,South China.Whereas large granitic batholiths commonly crop out in the center of the Nanling Range(corresponding geographically to the central and northern parts of Guangdong Province),many small stocks occur in the southern part of Jiangxi Province.Most of the small stocks are associated closely with economically significant rare-metal deposits(W,Sn,Nb,Ta).Here we report the results for biotite granites and two-mica granites from three Yanshanian stocks of the Longyuanba complex.LA-ICPMS U-Pb dating of zircon yields an age of 156.1±2.1 Ma for Xiaomubei biotite granite,and U-Pb zircon dating using SIMS yields an age of 156.7±1.2 Ma for Longyuanba-Chengjiang biotite granite and 156.4±1.3 Ma for Jiangtoudong two-mica granite.Biotite granites are silica-rich(SiO 2 =70%-79%),potassic(K 2 O/Na 2 O>1.9),and peraluminous(ASI=1.05-1.33).Associated samples are invariably enriched in Rb,Th,Pb and LREE,yet depleted in Ba,Nb,Sr,P and Ti,and their REE pattern shows a large fractionation between LREE and HREE((La/Yb) N =10.7-13.5) and a pronounced Eu negative anomaly(δEu=0.28-0.41).Two-mica granite samples are also silica-rich(SiO 2 =75%-79%),potassic(K 2 O/Na 2 O>1.2),and peraluminous(ASI=1.09-1.17).However,in contrast to the biotite granites,they are more enriched in Rb,Th,Pb and extremely depleted in Ba,Nb,Sr,P and Ti,and exhibit nearly flat((La/Yb) N =0.75-1.08) chondrite-normalized REE patterns characterized by strong Eu depletion(δEu=0.02-0.04) and clear tetrad effect(TE 1.3 =1.10-1.14).Biotite granites and two-mica granties have comparable Nd isotopic signatures,and their εNd(t) are concentrated in the 13.0 to 9.6 and 11.5 to 7.7 respectively.Their zircon Hf-O isotopes of both also show similarity(biotite granites:εHf(t)= 10.8-7.9,δ 18 O=7.98‰-8.89‰ and εHf(t)= 13.8 to 9.1,δ 18 O=8.31‰-10.08‰;two-mica granites:εHf(t)= 11.3 to 8.0,δ 18 O=7.91‰-9.77‰).The results show that both biotite and two-mica granites were derived mainly from sedimentary source rocks with a minor contribution from mantle-derived materials.In spite of some S-type characteristics,the biotite granites were formed by fractional crystallization of I-type magma and assimilation of peraluminous sedimentary rocks during their ascent to the surface.Therefore,they belong to highly fractionated I-type granites.Two-mica granites exhibit a tetrad effect in their REE patterns,but share the same isotopic features with the biotite granites,suggesting that they are highly fractionated I-type granites as well.Their Lanthanide tetrad effects may be attributed to the hydrothermal alteration by magmatic fluids that have suffered degassing at late stages.Granitic magmas undergoing fractional crystallization and wall-rock assilimation can generate highly evolved granites with no REE tetrad effect in the uni-phase system.However,in the late-stage of magmatic evolution in the multi-phase system(i.e.,magmatic-hydrothermal system),these magmas also can lead to the highly evolved granites exhibiting mew-shaped REE pattern characterized by tetrad effect as the consequence of melt-fluid and fluid-vapor fractionation,and the resultant autometasomatism.We thus suggest that the REE pattern exhibiting tetrad effect feature is an important indicator of rare metal mineralization in the early Yanshanian time in southern China,implying the metamorphism of the ore fluid.

A comparison study of tungsten-bearing granite and related mineralization in the northern Jiangxi-southern Anhui provinces and southern Jiangxi Province in South China

The southern Jiangxi Province(SJP) and northern Jiangxi-southern Anhui provinces(NJSAP) are the two most important tungsten metallogenic districts in South China. The SJP district is a well-known tungsten producer in South China where distributes several ore concentrated areas such as the "Chongyi-Dayu-Shangyou", "Yudu" and "Longnan-Quanan-Dingnan"areas, with many large and super large tungsten deposits including the famous Xihuashan, Piaotang, Pangushan and Dajishan deposits. In recent years, major prospecting breakthrough for W-polymetallic resources has been made in the NJSAP district.Several large and super large W-Cu(Mo) deposits, such as the Dahutang, Zhuxi, Dongyuan and Baizhangyan deposits, are discovered. These deposits are all genetically associated with the Yanshanian(Mesozoic) granitic magmatism. In this study, a systematic comparison of the temporal and spatial distribution, petrology, geochronology, and geochemical characteristics of the tungsten-bearing granites between the SJP and NJSAP districts has been made, with an aim to improving the understanding of the petrogenesis of the granites and associated metal enrichment mechanisms in the two tungsten ore districts in South China. The following conclusions can be drawn:(1) The ages of the tungsten-bearing granites and associated mineralization are different in the two districts, in the SJP district the ages are mainly concentrated in 165–150 Ma, whereas in the NJSAP district it displays two age periods, one is 150–140 Ma(Late Jurassic-Early Cretaceous), and the other is 135–120 Ma(Early Cretaceous).(2) The tungsten-bearing granites from both the NJSAP and SJP districts are highly fractionated granitic rocks, but the SJP granites have experienced higher degree of fractional crystallization and more extensive fluid metasomatism than the NJSAP granites.(3) The petrogeneses of the tungsten-bearing granites from the two districts are different, those from the NJSAP district originated from partial melting of less mature sandstone-mudstone intercalated with meta-volcanic rocks of the Neoproterozoic Shuangqiaoshan Group which are both W and Cu enriched, in contrast those from the SJP district were likely derived from the highly mature,clay-rich mudstones of the Mesoproterozoic age which are only W enriched. In summary, the different source rocks with different metal enrichment features and different magmatic evolution and fractional degrees for the granites in the two districts might be the key factors that controlled the different matallogenic characteristics of tungsten ore deposits in the two districts in South China.

Geochemistry, geochronology, and petro-genesis of the early Paleozoic granitic plutons in the central-southern Jiangxi Province,China

This paper reports the systematic study on petrology, geochemistry, LA ICPMS zircons U-Pb dating, and in situ Hf isotope geology of the four plutons in the central-southern Jiangxi Province, an important part of the South China Block. In the outcrops, rocks are gradually changed from wall rock (slate or schist) to pluton (gneissic granite); some residual blocks of sandy rock occur in the margin of pluton, and the foliations of residual blocks are parallel to those of both wall rock and gneissic granite. The thin-section observations show that the four plutons contain peraluminous minerals such as muscovite and sillimanite. The flattened and elongated feldspar and quartz grains are often visible in the gneissic granite, parallel to direction of lineation, suggesting that the granitic rock were subjected to a strong ductile shearing. Geochemically, the A/CNK values from 13 granitic samples are between 1.03 and 1.37 with an average of 1.16, indicating that the granites are of strongly peraluminous plutons. The REE compositions of the 13 samples are similar, showing higher REE contents, with enrichment in LREEs, depletion in Eu and REE patterns with relative LREE-enrichment and negligible Eu anomalies. They show enrichment in Rb, Th, U and depletion in Ba, Sr, Nb, Ti, belonging to a low Ba-Sr type of granite. Thus, the four bodies should be derived from the same magmatic source. Zircons used as U-Pb dating mostly exhibit euhedral shape and high Th/U values from 0.52 to 1.54 with an average of 1.08, suggesting that most zircons are of magmatic genesis. The zircons from four plutons yielded rather similar 206 Pb/ 238 U vs. 207 Pb/ 235 U concordia ages: 436.1±5.7 Ma for the Tangwan granite, 440.6±4 Ma for the Jiekou gneissic granite, 435.9±6.2 Ma for the Dongbao gneissic granite, and 441.9±3.1 Ma for the Jinxi K-granite, respectively, corresponding to Silurian Llandovery. Several xenocrysts yielded U-Pb ages around 700 Ma, implying that a breakup event took place during Neoproterozoic in the South China Block. In situ Lu-Hf isotopic analysis shows that all Hf (t) values of zircons are negative and have two-stage Hf model ages (TDM2) from 1.4 to 3.6 Ga, indicating that the Silurian granitic magma came from the recycle of Meso-Paleoproterozoic basement and even partly Archean rocks, and had not been effected by mantle magma. Researches on regional geology suggest that an intracontinental tectono-magmatic event took place during the early Paleozoic in the study areas, which is characterized by folding and thrusting, leading to crustal shortening and thickening, up to 20 km thickness. The high geothermal temperature from thickening crust and accumulation of producing high-heat radioactive elements gradually softened crustal rocks and caused a partial melting, forming peraluminous granitic magma. Under the post-orogenic extensional and de-pressure condition, these granitic magma rose and was emplaced in the upper crust, leading to development of S-type

赣南铁山垅钨矿田花岗斑岩地球化学特征、锆石U-Pb年龄及Hf同位素特征

赣南铁山垅钨矿田位于南岭钨锡多金属成矿带东段,已探获黑钨矿资源量超10万吨。铁山垅复式岩体包括主体似斑状黑云母花岗岩和补体细粒二云母花岗岩两部分,花岗斑岩呈脉状分布。矿田内花岗岩具有相似的地球化学特征,都属过铝质高钾钙碱性花岗岩类,表现出高硅、富铝、富碱、高钾、富成矿元素(W、Sn、Cu、Mo)和亏损Ba、Sr、Ti、P、REE、Eu,稀土配分曲线呈典型的“海鸥式”分布和M型四分组效应等特征。利用LA-ICP-MS锆石U-Pb定年方法获得花岗斑岩^(206)Pb/^(238)U年龄为146.7±0.5 Ma(MSDW=0.5),成岩时代属晚侏罗世。锆石的n(^(176)Lu)/n(^(177)Hf)=0.000973~0.001989,f_(Lu/Hf)=-0.97~-0.94,ε_(Hf)(t)=-17.9~-10.3,二阶段模式年龄(TDM2)为1.86~2.33 Ga,显示原岩为古元古代地壳。综合分析认为,铁山垅矿田岩浆活动可划分为170~155 Ma、155~150 Ma、150~145 Ma三个阶段,钨锡矿成矿主要集中在第二阶段,且第三阶段花岗斑岩与铜多金属矿成矿关系密切,推测铜岭矿区深部具有较大的找矿前景。

数字化赋能赣南苏区红色文化传播策略研究

文化是一个国家、一个民族的灵魂,红色是我国最鲜亮的底色。赣南苏区红色文化是先进的精神文化财富,是我国革命文化的重要组成部分。该文通过对赣南苏区红色文化传播的资源优势的分析与挖掘,基于5W模式深入思考数字化技术在赣南苏区红色文化传播中面临的挑战,从增强时效意识、整合意识、传播意识、创新意识与互融意识5个方面深入探寻数字化赋能赣南苏区红色文化的传播策略,以期以数字技术加快推进数字化保护开展落实、打造苏区红色资源数字平台、打造全媒矩阵扩大传播声量、深耕优质内容提升引领活力、引领红色文化产业创新发展。

赣南峰山离子型稀土矿床成矿机理探讨

以赣南大埠岩体西部峰山钻孔风化壳剖面为研究对象,在风化壳剖面各层地质特征研究的基础上,对风化壳剖面各层中含稀土矿物开展了扫描电镜和电子探针分析,探讨了风化壳剖面各层主、微量(包括稀土)元素和离子相稀土元素特征。研究表明,风化壳中稀土元素呈“弓背式”分布,矿体位于风化壳剖面2~9 m,w(REE)平均为516.8×10^(-6),离子相稀土元素浸出率为51%~84%,离子相与全项稀土元素总量分布特征一致。风化壳中稀土元素主要以离子吸附态形式和独立矿物(次生方铈矿和风化残余的磷钇矿、褐钇铌矿)形式存在,以离子吸附态形式为主。峰山风化壳离子吸附型稀土矿为轻、重稀土元素共生型稀土矿,以重稀土元素占主导,矿体上部相对富集轻稀土元素,下部相对富集重稀土元素。风化壳剖面中稀土元素的富集分异主要受轻重稀土元素地球化学行为的差异性、风化程度和黏土矿物含量联合控制。

赣北石门寺钨铜多金属矿床辉钼矿Re-Os同位素年龄及其地质意义

为了解赣北石门寺钨铜多金属矿床的钨富集机理及矿床成因,对该矿床中的辉钼矿开展了Re-Os同位素年代学研究。结果显示,6件辉钼矿样品的Re-Os模式年龄为140.2~142.5 Ma,加权平均年龄为(141.37±0.84)Ma(MSWD=0.84),等时线年龄为(141.79±0.97)Ma(MSWD=1.10),二者在误差范围内一致,可以代表辉钼矿的矿化年龄,指示该矿床的成矿时间为141 Ma左右。对赣北、赣中和赣南地区的成岩成矿年龄进行对比,发现三地的成岩成矿事件在时间上具有连续性。结合区域构造演化历程,本文认为石门寺钨铜多金属矿形成于早白垩世时期的伸展减薄环境。

赣南采茶戏的传承与创新——以张曼君导演的红色四部曲为中心

地方戏曲如何适应现代化的进程、实现自身的传承与创新,已成为百年来地方戏曲现代化的重要研究命题之一。越是有着悠久历史与深厚积淀的传统剧种,在现代化的过程中面临的困难和瓶颈也越多。在此语境下,张曼君导演的赣南采茶戏红色四部曲《山歌情》《八子参军》《永远的歌谣》《一个人的长征》,以打通戏曲、歌剧、舞剧、话剧、音乐剧、皮影、杂技等多种艺术样式的杂家姿态,使传统戏曲舞台与现代艺术手法相结合,其丰富新颖的舞台样式背后又既延续着传统的文化血脉,又彰显着现代性的品格,让拥有三百多年历史的赣南采茶戏成功地实现了传统的现代再生。

赣南苏区耕地后备资源调查评价方法研究与探讨——以安远县为例

本文以赣南苏区安远县为例,从生态、地形、土壤、气象、重金属污染、交通和灌溉等方面选择了11项指标,构建评价体系,对耕地后备资源进行评价分析。研究结果表明,通过评价分析,可以准确地掌握安远县宜耕后备资源的类型、数量、面积及空间分布特征,为安远县土地资源合理开发利用提供了重要的参考依据,也为安远县实现土地利用结构调整提供了科学依据。

≥35岁居民膳食模式与血脂异常相关性研究:基于赣南慢病队列调查数据

背景饮食与血脂异常密切相关,传统的营养流行病学关注单一的食物或食物类别,然而日常生活中并不是只消耗单一的营养素或食物。这使得区分个别饮食成分对血脂异常的影响变得更加困难。目前国内外尚无研究探讨赣南地区居民膳食模式与血脂异常之间的关联。目的分析赣南地区≥35岁居民膳食模式和血脂异常患病风险的关联,为制订防治血脂异常营养政策提供科学依据和理论。方法数据来源于赣南慢病队列2020年调查数据,于2020年7—8月,采用多阶段随机抽样的方法从赣南地区≥35岁常住居民中选取调查对象。采用问卷调查和体格检查方法收集居民的基本情况(一般资料、行为习惯、疾病史等),检测空腹血糖和血脂水平,并分析比较不同特征居民血脂异常的患病率。采用食物频率问卷简表进行膳食调查,并运用因子分析法提取膳食模式,将每类膳食模式按照因子得分的四分位数由低到高分为4个亚组Q1、Q2、Q3、Q4。使用Logistic回归分析探讨膳食模式与血脂异常患病风险的相关性。结果本研究共纳入赣南地区≥35岁居民1508名,血脂异常患病率为36.07%(544/1508)。饮水量充足、无高血压史、有糖尿病史的居民血脂异常患病率更高(P<0.05)。通过因子分析共提取出赣南地区4种膳食模式,分别为碳水-蔬菜-水产品类、粗粮-水果-奶类、禽畜肉-腌制品类和蛋类-豆制品类。调整混杂因素后的Logistic回归分析结果显示,相较于Q1水平,赣南地区蛋类-豆制品类膳食模式Q2、Q3水平居民血脂异常的患病风险更低(Q2:OR=0.648,95%CI=0.478~0.879,P=0.005;Q3:OR=0.616,95%CI=0.454~0.836,P=0.002),其他膳食模式尚未表现出对血脂异常患病风险的相关性。结论赣南地区≥35岁居民血脂异常的患病率较高,较高水平蛋类-豆制品类膳食模式可降低居民血脂异常的患病风险;应倡导赣南地区居民合理膳食,可适当增加蛋类和豆制品的摄入。

赣南马尾松林地表细小死可燃物含水率动态及模型

[目的]建立森林地表细小死可燃物(枯落叶、细枯枝、枯草等)含水率预测模型,预警区域森林火灾引燃的可能性及其潜在火行为。[方法]基于野外长期定位观测的赣南地区典型植被类型马尾松林地表细小死可燃物含水率数据,在不同地形条件和时间段进行气象因子随机森林相对重要性排序和皮尔逊相关性分析,建立地表细小死可燃物含水率随机森林模型和气象要素回归模型,比较不同模型精度指标,筛选适合赣南地区的森林火灾预测模型。[结果]赣南地区马尾松林地表细小死可燃物含水率具有明显变异性,阴坡含水率显著高于阳坡,在防火期初期最明显。地表细小死可燃物含水率与各气象要素(温度、相对湿度、风速、光照强度)具有极显著相关性(P<0.001);随机森林模型预测精度高于气象要素回归模型,阴坡2种模型精度均高于阳坡;具有滞后效应的光照强度因子对地表细小死可燃物含水率影响最大,影响地表细小死可燃物含水率的关键因素在阳坡是相对湿度、阴坡是风速。[结论]具有滞后效应的气象因子对赣南地区马尾松林地表细小死可燃物含水率有显著影响,考虑增加这些因素能更好预测地表细小死可燃物含水率变化,为火险预警提供可靠依据。

赣南铁山垅一带水系沉积物地球化学特征及找矿方向探讨

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随着我国经济建设的不断发展,工程施工后期的迹地恢复是保护环境、维护生态平衡的重要环节。为解决这一问题,采用土壤菌配置加客土喷播技术进行迹地恢复,将不同的土壤菌配置(DL1+DL2、DL1+DL3、DL2+DL3、DL1+DL2+DL3)加入喷播基质中并通过喷播的方式铺设到赣南山区边坡。针对赣南山区边坡后期迹地恢复问题,提出最优的土壤菌配置模式。结果表明,土壤菌的施用,促进土壤微生物活动,加速土壤中的生化反应,加入土壤菌能显著提高赣南山区边坡土壤的过氧化氢酶活性、蔗糖酶活性、中性磷酸酶活性和纤维素酶活性,能显著提高土壤中真菌、细菌、放线菌以及微生物的总数量,其中土壤菌DL1+DL2配置模式下对提高赣南山区土壤酶活性以及微生物数量效果最明显。

红色资源服务苏区振兴的实践探索、现实挑战和因应策略——以赣南原中央苏区为例

赣南原中央苏区拥有丰富的红色资源,在新时代的发展实践中取得了显著成绩,为红色资源服务苏区振兴奠定了文化资源优势、国家政策优势和发展基础优势。在实践中,赣南原中央苏区盘活红旅资源,带动产业振兴,传承红色基因,建设乡风文明,弘扬苏区精神,锻造干部队伍,充分激活了红色资源的经济价值和文化价值。与此同时,赣南原中央苏区也面临地方政府保护管理红色资源压力增大、开发利用红色资源创新性要求变高以及相关人才短缺等现实挑战。可以从创新红色资源保护管理体制机制、引导社会资本参与红色资源开发、壮大红色资源开发利用人才队伍等方面进行探索和优化,更好地激活红色资源,服务苏区振兴。

探讨南宋士人“地方化”问题研究的一部力作--《南宋江西士人社群与地方社会》读后

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基于AHP的赣南客家民居设计因子研究及其设计应用

为了探索赣南客家民居设计因子的现代设计方法,建立赣南客家民居设计因子层次模型并将其应用于现代空间设计中。通过文献研究法收集赣南客家民居的相关文献资料,从形态、色彩、材料与装饰4个方面分析其显性特征及隐性内涵。基于AHP层次分析法建立赣南客家民居设计因子层次模型,计算设计因子权重并进行一致性检验。根据因子重要程度,将其应用到室内空间案例中。得到赣南客家民居设计因子层次模型及其实际室内设计应用案例。该方法为赣南客家民居的传承与创新提供有效的路径,为传统民居与现代空间的有机结合提供参考。

晚清民国赣南房产契约惯习分析

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