Textures and mineral compositions of the Xinjie layered intrusion,SW China:Implications for the origin of magnetite and fractionation process of Fe-Ti-rich basaltic magmas

The Xinjie layered intrusion in the Panxi region,SW China,hosts both Fe-Ti oxide and platinum-group element（PGE） sulfide mineralization.The intrusion can be divided,from the base upward,into UnitsⅠ,ⅡandⅢ,in terms of mineral assemblages.UnitsⅠandⅡare mainly composed of wehrlite and clino-pyroxenite, whereas UnitⅢis mainly composed of gabbro.PGE sulfide-rich layers mainly occur in Unit I, whereas thick Fe-Ti oxide-rich layers mainly occur in UnitⅢ.An ilmenite-rich layer occurs at the top of UnitⅠ.Fe-Ti oxides include magnetite and ilmenite.Small amounts of cumulus and intercumulus magnetite occur in UnitsⅠandⅡ.Cumulus magnetite grains are commonly euhedral and enclosed within olivine and clinopyroxene.They have high Cr2O3 contents ranging from 6.02 to 22.5 wt.%,indicating that they are likely an early crystallized phase from magmas.Intercumulus magnetite that usually displays ilmenite exsolution occupies the interstices between cumulus olivine crystals and coexists with interstitial clinopyroxene and plagioclase.Intercumulus magnetite has Cr2O3 ranging from 1.65 to 6.18 wt.%, lower than cumulus magnetite.The intercumulus magnetite may have crystallized from the trapped liquid.Large amounts of magnetite in UnitⅢcontains Cr2O3（＆lt;0.28 wt.%） much lower than magnetite in UnitsⅠandⅡ.The magnetite in UnitⅢis proposed to be accumulated from a Fe-Ti-rich melt.The Fe-Ti-rich melt is estimated to contain 35.9 wt.%of SiO2,26.9 wt.%of FeOt,8.2 wt.%of TiO2,13.2 wt.%of CaO, 8.3 wt.%of MgO,5.5 wt.%of Al2O3 and 1.0 wt.%of P2O5.The composition is comparable with the Fe-rich melts in the Skaergaard and Sept Iles intrusions.Paired non-reactive microstructures,granophyre pockets and ilmenite-rich intergrowths,are representative of Si-rich melt and Fe-Ti-rich melt,and are the direct evidence for the existence of an immiscible Fe-Ti-rich melt that formed from an evolved ferro-basaltic magma.

Design Strategy of Rural Settlement Landscape: A Case Study of Xinji Village in Beijing

Improving rural living environment is an important support for farmers to live and work in peace and contentment,which is of great significance to the shaping of happy and livable homes in rural areas under the background of "beautiful countryside".Through the comprehensive renovation of the beautiful countryside,great progress has been made in improving the rural living environment in Beijing,but there are still problems in rural settlement landscape such as poor quality of landscape environment,low utilization rate of public space,and insufficient protection of traditional features.This study took the design strategy of rural settlement landscape as the research entry point,took the rural high-quality landscape environment demand and the beautiful rural construction goal as the double guidance,explored the design strategy of improving the quality of rural settlement landscape through the methods of field survey and questionnaire survey,and put forward the following design points:①From the perspective of overall consideration and advantage integration,the overall framework of rural settlement landscape should comprehensively consider rural architectural landscape and living environment landscape;②efforts should be made to create public spaces such as the village landscape image Avenue,landscape sharing garden,and open courtyard in front of the house,so as to improve the environmental quality and spatial vitality of the village;③strengthen the protection of the traditional features of the village,such as the famous ancient trees,the texture of the courtyard,the quality of residential buildings,etc.with a view to promoting the improvement and overall improvement of the rural environment.

Hebei Xinji Barium Salt Group Co. Ltd

The Hebei Xinji Barium Salt Group Co. Ltd is the largest barium salt production and export base in the world. Major products include Five Continents brand industrial barium carbonate, high purity barium carbonate, precipitated barium sulphate, barium nitrate, industrial sodium sulphide, industrial sulfur, sodium thiosulfate and sodium hydrosulphide. The annual output of barium salt is 120,000 tons, 2/3 for export. In 1995, the export value was US$20 million. As early as in 1953, its sodium sulphide began to be exported and re-

Tanning Industry in Xinji City

Xinji City, in the middle south of Hebei Province, has a tanning history of more than 400 years. The city boasted over 100 kinds of fur and leather products, over 300 workshops and shops and 24 foreign agencies in the early years of the Qing Dynasty (1644-1911). Since 1949, especially since 1981,the city’s tanning industry has witnessed a big leap. There are around 10, 000 tanning enterprises in the city with an annual industrial value of RMB 1.3 billion and an annual export value of US $

Xinji Wall Hanging,a Flower of Chinese Folk Art

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煤层气开发井网优化设计——以新集矿区为例

以新集矿区为例,系统地研究了煤层气开发井网设计的具体内容及工作程序。根据对新集矿区煤储层地质条件分析,确定了煤层气开发的目标煤层以及布井间距设计原则;通过煤储层数值模拟的产能预测,确定了煤层气开发的井网布置样式;在产能预测的基础上,结合经济分析,优化了煤层气开发的布井间距,进而提出了新集矿区首期煤层气开发布井方案,并进行了产能预测。指出新集矿区煤层气开发应采用地面垂直井、采动区煤层气开发以及井下瓦斯抽放等多种开发方式综合并举的形式。

河北辛集井水温梯度及固体潮特征

对河北辛集井进行了50～200m深度内的井水温梯度测试，结果表明测试深度内存在3处负梯度段（50～60m处、90～110m处、130～140m处）。在50～60m深度处的水温负梯度位置，发现了清晰的水温固体潮，其相位与水位固体潮相反。根据该井的综合钻井资料、水文地质条件分析认为水温负梯度可能与井管外低温含水层热交换有关，并讨论了负梯度处的水温固体潮特征。

深层深井井筒完整性检测技术发展现状

随着油气资源开发不断向深水、深层/超深层迈进,复杂的地层和井筒条件给油气井安全稳定生产带来极大挑战。常规电缆测井技术和套管封隔器找堵漏技术虽然可以满足井筒完整性检测的技术需求,但需要油井停产,且联合检测费用较高。近年来,光纤传感技术在油气行业越来越广泛的应用,为井筒完整性实时监测打开了新思路。通过系统总结井筒完整性检测技术的发展及现状,对深层深井井筒完整性检测技术做出如下展望:(1)将光缆永久式、半永久式布置在油井内,可对井筒内温度场、压力场、应力场、声波、振动、流体进行实时监测,为油气井完整性状态评估提供直接数据;(2)分布式光纤温度传感技术(DTS)和分布式声波传感技术(DAS)等具有连续、实时、分布式测量的特点,适合在建井阶段投入使用,实现油气井全生命周期的完整性监测;(3)对光纤信号处理大部分依靠经验法,通过模拟实验确定信号范围,实验室与井下的真实环境相比差距较大,需深入开展入井试验,通过井筒真实环境建立实际的测量解释模型。