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| 滇黔交界地区玄武岩铜矿中有机质的生物标志物特征及其地质意义 | |
| 引用本文： | 李厚民,毛景文,张长青,许虹,陈毓川,王登红.滇黔交界地区玄武岩铜矿中有机质的生物标志物特征及其地质意义[J].地质论评,2005,51(5):539-549. |
| 作者姓名： | 李厚民 毛景文 张长青 许虹 陈毓川 王登红 |
| 作者单位： | 1. 中国地质科学院矿产资源研究所,北京,100037;长安大学,西安,710054 2. 中国地质科学院矿产资源研究所,北京,100037;中国地质大学地球科学与资源学院,北京,100083 3. 中国地质大学地球科学与资源学院,北京,100083 4. 中国地质科学院,北京,100037 5. 中国地质科学院矿产资源研究所,北京,100037 |
| 基金项目： | 中国地质调查局地质调查项目;科技部科研项目 |
| 摘 要： | 滇黔交界地区玄武岩中赋存的自然铜矿化与沥青密切相伴,玄武岩层间含碳沉积岩中的自然铜矿化发育大量碳质。本文采用有机质抽提、族组分定量及饱和烃色-质分析等方法对这两种产状的铜矿石中有机质的族组分含量和生物标志物进行了研究,并对其地质意义进行了探讨。通过研究取得如下认识：①含沥青铜矿石和含碳质铜矿石虽然产状明显不同,其有机质成因有明显差异,但其有机质族组分含量及生物标志物特征十分类似,反映它们经历了类似的地质作用;②有机质族组分及其生物标志物提供的来源信息较混乱,这可能是成矿流体循环改造导致的;③生物标志物特征表明,含沥青铜矿石及含碳质铜矿石中有机质经历了类似的较还原的高盐度环境,这可能是高盐度成矿流体及还原的成矿条件的指示;④生物标志物特征及氯仿沥青“A”低含量特征表明两类铜矿石中有机质成熟度高,这可能是成矿流体的热力对有机质改造的结果;⑤有机质生物标志物特征显示两类铜矿石中有机质生物降解作用不强,表明沥青的形成是原油受成矿热液热力影响发生热裂解的结果。 |
| 关 键 词： | 生物标志物 饱和烃 氯仿沥青"A" 有机质 铜矿 玄武岩 |
| 收稿时间： | 2004-09-03 |
| 修稿时间： | 2004-09-032005-03-04 |
Biomarkers of Organic Matter in Basalt Copper Ores from Northeastern Yunnan Province and Western Guizhou Province and Their Geological Significance |
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| LI Houmin,MAO Jingwen,ZHANG Changqing,XU Hong,CHEN Yuchuan and WANG Denghong.Biomarkers of Organic Matter in Basalt Copper Ores from Northeastern Yunnan Province and Western Guizhou Province and Their Geological Significance[J].Geological Review,2005,51(5):539-549. | |
| Authors: | LI Houmin MAO Jingwen ZHANG Changqing XU Hong CHEN Yuchuan and WANG Denghong |
| Institution: | Institute of Mineral Resources; Chinese Academy of Geological Sciences; Beijing; 100037 Chang an University; Xi an; Shaanxi; 710054 Faculty of Geosciences and Resources; China University of Geosciences; 100083 Chinese Academy of Geological Sciences; 100037; |
| Abstract: | There are bitumen in the native copper ores hosted by the Emeishan Basalt and carbonaceous material in the native copper ores hosted by sedimentary rocks between basalt layers in the district of northeastern Yunnan and western Guizhou. The contents of the chloroform bitumen "A" extracted from the organic matter in these two types of copper ores and the saturates, aromatics, resins and asphaltenes in it are quantified and the biomarkers of the saturates are studied by chloroform extraction method and GSMS, and their geological significances are discussed. The conclusions are: (1) There are no obvious differences in the contents of chloroform bitumen "A" and saturates, aromatics, resins and asphaltenes and the features of biomarkers between the two types of copper ores though their occurrences and genesis are different, which implies that they suffered similar geological events. (2) The confusion of the genetic information supplied by the organic compositions and their biomarkers may be the result of the activities of the ore-forming fluid. (3) The features of biomarkers also suggests that the organic matter in these copper ores experienced a salty and reduced environment, which maybe related to the brine-source metallogenetic fluid and reduced condition of mineralization. (4) The features of biomarkers and the low contents of chloroform bitumen "A" show a high maturity of the organic matter in the copper ores, which may be caused by the heat of the ore-forming hydrothermal fluid. (5) There is no obvious biodegradation according to biomarkers, which suggests that the bitumen is from the degradation of petroleum caused by the heat of ore-forming fluid. |
| Keywords: | biomarkers saturates chloroform bitumen "A" organic matter copper deposits basalt |
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