| 和田河流域沙和基岩的角闪石成分及石英~(18)O值 |
| |
| 引用本文： | 钱亦兵,吴兆宁,奥村公男,松久幸敬.和田河流域沙和基岩的角闪石成分及石英~(18)O值[J].干旱区研究,1993(2). |
| |
| 作者姓名： | 钱亦兵 吴兆宁 奥村公男 松久幸敬 |
| |
| 作者单位： | 中国科学院新疆生物土壤沙漠研究所，新疆工学院地质系，日本地质调查所，日本地质调查所 乌鲁木齐 830011，乌鲁木齐 830000 |
| |
| 摘 要： | 本文运用电子探针和氧同位素测试等手段,分析了和田河流域沙物质及某些有关基岩所含角闪石的种类、普通角闪石的化学成分和石英的δ~(18)O值。沙物质和岩浆岩(钾长花岗岩)在所含角闪石种类以及普通角闪石化学成分上的差异性明显大于相似性,说明后者为前者提供的角闪石有限。另外,沙丘沙含有多种变质成因的角闪石。产生这种现象的合理解释是:变质岩风化产物是沙的重要物源。沙物质中石英δ~(18)O值介于变质石英氧同位素成分范围,并且粒度愈细的石英,δ~(18)O值愈高。根据基岩中云母片岩所含石英颗粒最细、δ~(18)O值最高的特点判断,细沙物质在风扬过程中混入了较多的高δ~(18)O值细粒变质石英。
|
| 关 键 词： | 沙物质 基岩 化学成分 氧同位素 物源 |
The Chemical Composition of Amphibole and Oxygen Composition of Quartz in Sands and Bedrocks in the Hotan River Basin |
| |
| Qian Yibing.The Chemical Composition of Amphibole and Oxygen Composition of Quartz in Sands and Bedrocks in the Hotan River Basin[J].Arid Zone Research,1993(2). |
| |
| Authors: | Qian Yibing |
| |
| Abstract: | With EPMA and analysis of oxygen isotope composition, the typies of amphibole, chemical composition of hornblende and oxygen isotope composition of quartz in sands and bedrocks in the Hotan River basin were determined. There are a number of amphiboles developed in metamorphic rocks in sands, and the oxygen isotope compositions of quartz in dune sands and similar to that of metamorphic quartz. These cases are considered to results from the mixing of material dertived from metamorphic rocks. |
| |
| Keywords: | sand bedrock chemical composition oxygen isotope composition material source |
| 本文献已被 CNKI 等数据库收录！ |
