| 关于砂金非传统成因类型——风成砂金研究之概述 |
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| 引用本文： | 韩致文,董光荣,陈广庭,哈斯.关于砂金非传统成因类型——风成砂金研究之概述[J].大自然探索,1997(3). |
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| 作者姓名： | 韩致文 董光荣 陈广庭 哈斯 |
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| 作者单位： | 中国科学院兰州沙漠研究所 |
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| 摘 要： | 前苏联科学院西伯利亚分院布利亚特地质研究所斯捷潘诺夫娜（Н．З．Степанновна）以勒拉—维柳伊河间地带为例，通过风洞实验、矿物学研究及野外考察，第一次划分出一种新的非传统砂金成因类型——风成砂金，以详实的资料论证了风成砂金的成因、形态、分布规律及富集特点。指出环形及空心球状金粒是鳞片状金在风力环境中机械改造的结果，提出了风成砂金矿类型划分依据。
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| 关 键 词： | 砂金 非传统成因类型 风成砂金 |
ORDOVICIAN CEPHALOPOD BIOFACIES IN THE WESTERN MARGIN OF THE JIANGHAN (YANGZI HANSHUI) BASIN |
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| Xiao Chuantao.ORDOVICIAN CEPHALOPOD BIOFACIES IN THE WESTERN MARGIN OF THE JIANGHAN (YANGZI HANSHUI) BASIN[J].Discovery of Nature,1997(3). |
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| Authors: | Xiao Chuantao |
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| Abstract: | On the basis of reseach on the ecological characteristics of the Ordovician cephalopod fauna in the western margin of the Jianghan (Yangzi Hanshui) Basin,8 cephalopod biofacies have been recognizes.The authors of the present paper have analyzed the component and the ecological environments of these biofacies and further suggested that there are 3 cycles of the changes of the sea level in this area during Ordovician Period and its generaltrend of rising exists. |
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| Keywords: | ordovician cephalopoda biofacies Jianghan(Yangzi Hanshui) Basin |
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