| 羌塘盆地侏罗系核形石特征及成因探讨 |
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| 引用本文： | 彭智敏,廖忠礼,张予杰,陈文彬.羌塘盆地侏罗系核形石特征及成因探讨[J].沉积与特提斯地质,2010,30(3):109-112. |
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| 作者姓名： | 彭智敏 廖忠礼 张予杰 陈文彬 |
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| 作者单位： | 成都地质矿产研究所,四川,成都,610081 |
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| 摘 要： | 羌塘盆地侏罗系核形石纹层不发育,只有个别核形石发育不规则的纹层,未发现菌藻类痕迹;核心主要以大小不等的生物碎屑为主;核形石与填隙物都由泥晶方解石组成,只是颜色上有差别。核形石主要产在能量较低的泻湖、局限陆棚环境中。
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| 关 键 词： | 核形石 纹层构造 侏罗系 羌塘盆地 |
Characteristics and genesis of the oncolites from the Jurassic strata in the Qiangtang Basin |
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| PENG Zhi-min,LIAO Zhong-li,ZHANG Yu-jie,CHEN Wen-bin.Characteristics and genesis of the oncolites from the Jurassic strata in the Qiangtang Basin[J].Sedimentary Geology and Tethyan Geology,2010,30(3):109-112. |
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| Authors: | PENG Zhi-min LIAO Zhong-li ZHANG Yu-jie CHEN Wen-bin |
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| Institution: | (Chengdu Institute of Geology and Mineral Resources,Chengdu 610081,Sichuan,China) |
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| Abstract: | Unlike common oncolites,no laminated structures and no algal organisms are observed in the coatings of the oncolites from the Jurassic strata in the Qiangtang Basin.The cores generally contain bioclastics of varying sizes.Both the oncolites and their interstitial materials consist of micritic calcite.The oncolites occur mainly in the lower-energy lagoon and restricted shelf environments. |
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| Keywords: | oncolite laminated structure Jurassic Qiangtang Basin |
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