全文获取类型
收费全文 | 74篇 |
免费 | 17篇 |
专业分类
大气科学 | 4篇 |
地球物理 | 60篇 |
地质学 | 14篇 |
海洋学 | 3篇 |
天文学 | 9篇 |
综合类 | 1篇 |
出版年
2022年 | 1篇 |
2021年 | 3篇 |
2020年 | 6篇 |
2019年 | 5篇 |
2018年 | 6篇 |
2017年 | 7篇 |
2016年 | 6篇 |
2015年 | 3篇 |
2014年 | 4篇 |
2012年 | 3篇 |
2011年 | 4篇 |
2010年 | 3篇 |
2009年 | 4篇 |
2008年 | 4篇 |
2007年 | 4篇 |
2006年 | 1篇 |
2005年 | 6篇 |
2004年 | 2篇 |
2003年 | 4篇 |
2002年 | 4篇 |
2000年 | 4篇 |
1998年 | 3篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1987年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有91条查询结果,搜索用时 78 毫秒
91.
Tremolite–calcite veins in the footwall of the Simplon Fault,Antigorio Valley,Lepontine Alps (Italy)
Vito Meggiolaro Michele Sapigni Anna Maria Fioretti 《Swiss Journal of Geoscience》2011,104(3):355-365
The lowermost units of the nappe pile of the Lepontine Alps crop out in the Antigorio valley in the footwall of the Simplon
Fault. The whole orthogneiss section of the Antigorio Unit is exposed on both sides of the valley, sandwiched between the
Mesozoic metasedimentary sequences of the Baceno unit below and the Tèggiolo unit above. The petrography and mineral composition
of tremolite–calcite veins occurring in dolomite marble in both metasedimentary sequences were investigated. Tremolite–calcite
(with lesser talc and minor phlogopite) veins have rhythmic banded texture. Banding is due to cyclic differences in modal
abundances and fabric of tremolite and calcite. These veins are very similar to those occurring in dolomite rafts within the
Bergell granite and it is inferred that they formed by the same “fracture-reaction-seal” mechanism. Veins formed by reaction
of a silica-rich aqueous fluid with the host dolomite marble along fractures. According to thermo-barometric calculations,
based on electron microprobe analyses, reaction occurred at temperatures between 450 and 490°C and minimum pressure of 2–3 kbar.
Such temperature conditions occurred in this footwall region of the Simplon Fault Zone around 15 Ma, during exhumation and
cooling of the nappe pile and a transition to brittle behaviour. Aqueous, silica-rich fluids concentrated along fractures,
forming tremolite–calcite veins in the dolomite marbles and quartz veins in the orthogneiss. 相似文献