| 南极普里兹湾主要碎屑矿物特征及物源分析 |
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| 引用本文： | 刘轶莹,金秉福,陈志华,王昆山.南极普里兹湾主要碎屑矿物特征及物源分析[J].海洋学报,2016,38(5):96-107. |
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| 作者姓名： | 刘轶莹 金秉福 陈志华 王昆山 |
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| 作者单位： | 1.鲁东大学 海岸研究所, 山东 烟台 264025 |
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| 基金项目： | 南北极环境综合考察与评估专项(CHINARE2013-01-02)。 |
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| 摘 要： | 基于南极普里兹湾海域33个表层碎屑沉积物样品的碎屑矿物学分析,对该区的沉积环境与物质来源进行了分析。结果表明该区碎屑重矿物共17种,石榴子石、普通角闪石和磁铁矿为优势矿物,紫苏辉石和赤铁矿为特征矿物。根据矿物组合分布特征,普里兹湾可划分为4个矿物区:Ⅰ区为石榴子石含量占绝对优势、重矿物含量较高的弗拉姆浅滩矿物区;Ⅱ区为石榴子石、普通角闪石含量较高,磁铁矿为特征矿物的普里兹水道矿物区;Ⅲ区为紫苏辉石含量较突出的四女士浅滩矿物区;Ⅳ区为普通角闪石含量明显突出,石榴子石显著减少的深水陆坡矿物区。通过电子探针测试研究区石榴子石结果表明:碎屑石榴子石含有较高的Fe、Mg和较低的Ca、Mn,属主要来源于高级麻粒岩相副变质岩的A型石榴子石。普里兹湾海域的碎屑矿物分布特征是物质来源、海流系统以及冰川活动等多重因素综合作用的产物。
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| 关 键 词： | 碎屑矿物 石榴子石 沉积物 普里兹湾 |
| 收稿时间： | 2015/6/10 0:00:00 |
Characteristics and provenance of main detrital minerals in the Prydz Bay,Antarctic |
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| Liu Yiying,Jin Bingfu,Chen Zhihua and Wang Kunshan.Characteristics and provenance of main detrital minerals in the Prydz Bay,Antarctic[J].Acta Oceanologica Sinica (in Chinese),2016,38(5):96-107. |
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| Authors: | Liu Yiying Jin Bingfu Chen Zhihua and Wang Kunshan |
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| Institution: | 1.Institute of Coast, Ludong University, Yantai 264025, China2.The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: | The depositional environment and sedimentary provenance were studied in the Prydz Bay based on mineralogical analysis of 33 surface sediment samples. Seventeen types of heavy minerals were recognized in this study. Garnet,hornblende and magnetite are the dominant heavy minerals,hypersthene and hematite are the characteristic minerals. From the distribution of the mineral assemblages,four mineral provinces can be identified. In Fram Bank mineral province (Province I),the garnet is treated as the main mineral and has the highest content of heavy mineral. In Prydz channel mineral province (Province II),the magnetite is treated as the diagnostic mineral,garnet and epidote take a dominant position of the minerals. In Four Ladies Bank province (Province Ⅲ) has significant content of hypersthene. In deep slope mineral province (Province Ⅳ),the main mineral is hornblende and the garnet is less than other provinces. The mineralogical characteristics of garnets from the study area shows that, the clastic garnet contains higher Fe,Mg element and lower Ca,Mn element,and mainly comes from senior granulite facies. Detrital mineral distribution characteristics is controlled by provenance,the current system and glacier activities such as a product of the combined action of multiple factors. |
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| Keywords: | detrital minerals garnet sediments Prydz Bay |
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