| 广东省海岸表层沉积物矿物表面特征与沉积环境关系的初步研究 |
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| 引用本文： | 朱素琳,梁百和,吴华新.广东省海岸表层沉积物矿物表面特征与沉积环境关系的初步研究[J].岩石矿物学杂志,1990,9(2):159-165. |
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| 作者姓名： | 朱素琳 梁百和 吴华新 |
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| 摘 要： | 作者选择了s7个分布于不同海岸相带及近海河流环境表层碎屑沉积物中的错石、电
气石、长石、石英四种矿物，用扫描电境放大300至iooo。倍观察分析其表面结构特征。观察分析发现，不同环境下的矿物表面结构特征有一定区别.这些区别主要由不同环境因素造成。河流环境的矿物表面结构简单，由物理作用造成;海岸环境的不同相带，矿物表面结构特征比较复杂，但程度有所不同。其特征主要取决于物理作用和所迭加的化学溶蚀作用。热带、亚热带海水对矿物的化学溶蚀和改造十分重要。
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| 关 键 词： | 沉积物 矿物 表面特征 沉积 环境 |
A Preliminary Study of the Relationship between the Surface Characters of Clastic Minerals from the Surficial Sediments and the Sedimentary Environment 0n the Coast of Guangdong |
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| Abstract: | The authors selected zircon, tourmaline, quartz and feldspar from 67 samples
of different facies on the coast of Guangdong for ultrastructural observation with
a magnification from 300 to 10, 000 under an electron scanning microscope. It has
been found that the mineral grains vary ultra-morphologically from place to place,
suggesting the influence of different environmental factors. The grains from rivers
mostly show simple but irregular collision pits, some being disc-shaped or desqua-
mated, which probably resulted from physical erosion. The exposed areas have
yielded rounded grains covered with mini-pores, fissures and funnel-shaped
corrosion pits, suggesting a physical erosion together occasionally with chemical corrosion. The morphology of the rounded grains from some periodically exposed facies zones, e. g. intertidal zone, is varied, assuming shell-or honeycomb-shaped raini-pits, small directional striae, curved fissures, V-shaped corroded pits and some Si02 precipitates, which are considered to have been formed by physical erosion in combination with chemical corrosion. An equally complicated texture was also found at the surface of the mineral grains from the underwater zones. It is characterized by honeycomb, corroded pits, irregular or parallel fissures, curved stepIike and funnel-shaped corroded pits as well as Si02 precipitates. This texture is probably a product of chemical corrosion associated with a joint physicalchem ical corrosion. All these characters seem to indicate the origins of different facies zones in this particular coastsl area. |
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| Keywords: | scanning electron microscope surface characters of minerals sedimentary environ went Gnangdong |
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