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Ore Texture,Mineralogy and Whole Rock Geochemistry of the Iron Mineralization from Edea North Area,Nyong Complex,Southern Cameroon:Implication for Origin and Enrichment Process

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International Journal of Geosciences 2017年第5期8卷 659-677页

作者： Bravo Martin Mbang Bonda Jacques Etame Arnaud Patrice Kouske Elie Constantin Bayiga Gilbert Francois Ngon Ngon Simon Joel Mbai martine gerard Department of Earth Sciences Faculty of ScienceUniversity of DoualaDoualaCameroon Department of Civil Engineering The University Institute of TechnologyUniversity of DoualaDoualaCameroon IRD UMR 161 CEREGEInstitut de mineralogie et physique des milieux condensesParisFrance

This study presents the ore texture, mineralogy and whole rock geochemistry of iron occurrence from the Edea North area located at the upper limit of the Nyong Unit, part of the Congo craton. This iron mineralization is of magnetite quartzite type enclosed by metamorphic rocks of the granulite facies. Two main facies have been identified over the study area including the banded and the massive facies. The mineralogical set of these facies is in majority represented by magnetite, quartz and pyroxene martite in addition to minor biotite, apatite, and amphibole. Magnetite presents as irregular and elongated minerals which can contain quartz inclusions of various shapes and sizes, as blasts clustering, around pyroxenes and isolated xenomorphic magnetite minerals in the silicate phases. Quartz varies from fine to coarse-grained and ribbon quartz. This indicates re-crystallization and deformation during metamorphism. Electron microprobe analysis on magnetite and martite show Fe2O3 contents that vary between 96.11 and 99.76. Whole rock chemical data showed that Fe-contents are as high as 62.9 wt%. The SiO2 content varies between 33.8 wt% and 51.2 wt%. Iron oxides and SiO2 are negatively correlated. Moreover, the low positive correlations between Al2O3 and HFSE, and LILE suggest a contribution of clastic materials in the protolith of studied materials. The samples show low contents of V, Cr, Ba, Zr with respect to igneous rocks. This may infer a sedimentary origin for the studied rocks;furthermore, these materials may have undergone hydrothermal alteration. The REE patterns reveal enrichment in LREE compared to HREE. Some samples show positive Eu (1.82) and other negative anomalies Eu (0.54 to 0.97). The lack of Ce anomalies suggests that the depositional environment of the Edea North iron occurrence was anoxic or suboxic. Overall, the Edea North iron occurrence may have undergone significant input from hydrothermal sources with imprints of the clastic during its deposition.

关键词： Magnetite Texture Edea North Nyong Complex Southern Cameroon

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Human sperm quality and lipid content after migration into normal ovulatory human cervical mucus containing low numbers of leukocytes

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Asian Journal of Andrology 2009年第3期11卷 308-316页

作者： Nozha Chakroun-Feki Patrice Therond martine Couturier Florence Eustache gerard Limea Alain Legrand Pierre Jouannet Jacques Auger Laboratory of Reproductive Biology/CECOS （Center of Study and Conservation of human Eggs and Sperm） Cochin Hospital Rend Descartes University Paris 75014 France Laboratory of Clinical and Metabolic Biochemistry EA 3617 Rend Descartes University Paris 75270 Cedex 06 France INSERM U551 La Pitie Hospital 75651 Paris Cedex 13 France

The aim of this study was to investigate whether a relationship exists between the presence of low numbers of leukocytes in normal ovulatory cervical mucus and sperm quality and lipid content after migration. The percentages of live, motile and morphologically normal spermatozoa, movement parameters assessed by computer-aided sperm analysis （CASA）, and ionophore-induced acrosome reaction measured by flow cytometry were determined before and after migration. High-performance liquid chromatography with ultraviolet detection was used to measure the sperm lipid content, including the various diacyl subspecies. The number of leukocytes found in solubilized mucus samples was counted using a haemocytometric method. Overall, the presence of leukocytes in the cervical mucus samples did not significantly influence sperm motility and morphology, sperm kinematic parameters, or the sperm content in sphingomyelin or cholesterol. In contrast, after migration, the decrease in various sperm diacyls and the level of induced acrosome reaction was significantly less pronounced in mucus samples containing ≥10^4 leukocytes than in mucus samples with no or rare leukocytes whereas the level of induced acrosome reaction was higher. The present data suggest that the low level of leukocytes found in normal ovulatory cervical mucus could influence the process of sperm lipid remodelling/capacitation.

关键词： cervical mucus leukocyte lipid spermatozoa

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西藏喜马拉雅山边缘的地壳结构及其变化

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石油物探 1985年第4期 62-66页

作者： A·依尔恩高恩源法国巴黎第六大学地球物理研究所

西藏雅鲁藏布江缝合线南部壳—幔边界的广角反射剖面,揭示了喜马拉雅山之北连续莫霍界面的深度(70公里),而向前莫霍界面的深度要浅15公里.再往南从35公里深度来的反射波是来自印度半岛的莫霍界面.

关键词：喜马拉雅山反射波莫霍界面地球间断面地壳厚度莫霍面地壳结构西藏

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伟业街133号

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城市环境设计 2016年第5期 118-125页

作者：威尼·马斯雅各布·凡·里斯娜塔莉·德·弗里斯 Renske van der Stoep Wenchian Shi martine Vledder Arjen Ketting Kyo Suk Lee Edwin Veth gerard Heerink Ting Wen Nicolas Lee Jason Slabbynck Matias Thomsen Matteo Artico Emilie Koch Arian Lehner Sanne van der Burgh Mikel Vazquez KlaasHofman

香港伟业街133号是从旧厂房脱胎换骨,摇身变成的一个玻璃办公楼。这个兼带零售和餐饮的建筑,使用不锈钢填充的玻璃作为唯一建筑材料。项目共18 000m2,坐落于后工业区九龙东内的观塘海滨,是打造九龙东新中央商务区这一城市变革计划的一... 详细信息

香港伟业街133号是从旧厂房脱胎换骨,摇身变成的一个玻璃办公楼。这个兼带零售和餐饮的建筑,使用不锈钢填充的玻璃作为唯一建筑材料。项目共18 000m2,坐落于后工业区九龙东内的观塘海滨,是打造九龙东新中央商务区这一城市变革计划的一部分。项目的初衷是创造彻底透明化的办公环境,一个全通透的办公楼将其淋漓尽致地体现。本工程在2013年由开发商基汇资本启动,它将这个区域的工业根源和未来的都市憧憬紧紧相连,现已成为该地区的旗舰项目之一。

关键词：玻璃窗建筑办公楼办公空间

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