| 何金先,张晓丽,王兆夺,段毅.铜仁地区陡山沱期盖帽碳酸盐岩地质地球化学特征及其成因[J].地质找矿论丛,2013,28(3):412-418 |
| 铜仁地区陡山沱期盖帽碳酸盐岩地质地球化学特征及其成因 |
| Geological characteristics and genetic of cap carbonates of Doushantuo Formation, Tongren Region |
| 投稿时间：2013-06-13 |
| DOI：10.6053/j.issn.1001-1412.2013.03.012 |
| 中文关键词: 铜仁地区陡山沱组 盖帽碳酸盐岩 地质、地球化学特征 成因 甲烷渗漏 贵州省 |
| 英文关键词:Doushantuo Formation in Tongreng region cap carbonates grology geochemical characteristics methane seep genetic discussion Guizhou province |
| 基金项目:中国科学院2011年度研究生科技创新类项目(编号:2011-37)资助。 |
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| 中文摘要: |
| 通过对贵州铜仁地区陡山沱期盖帽碳酸盐岩进行野外地质观察与室内岩石薄片显微镜下观察和研究,发现盖帽碳酸盐岩普遍发育有晶洞构造、帐篷构造、层状裂隙及包卷状构造等特殊沉积构造,重晶石、黄铁矿广泛发育,δ(13C)(2个研究剖面平均值分别为-4.73×10-3,-4.52×10-3)普遍显著负偏。研究区盖帽碳酸盐岩的地质地球化学特征依据"甲烷渗漏"成因假说能够较合理地解释。 |
| 英文摘要: |
| Field observation and microscopic study on thin sections reveal that special sedimentary structures, such as miarolitic structure, tepee-like structure, layer jointed structure and convolute structure, barites and pyrite are widely developed and δ(13C) values were generally significant negative(the average value was-4.73×10-3 and -4.52×10-3 in each study section). The "methane seep" hypothesis can be used to give a good explanation to part of geological characteristics and geochemical characteristics of the cap carbonates so the conclusion is reached that the cap carbonates is formed by"methane seep". |
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