『Abstract
　Conventional wisdom once held that weathering in cold climates was overwhelmingly due to physical processes. However, that convention was challenged when chemical weathering was identified, but unexplained, as the dominant landscape denudation process in Karkevagge（最初のaの頭に¨）, an alpine valley in Swedish Lapland. The research reported here involved scanning electron microscopy and energy dispersive X-ray fluorescence of rock coatings to investigate chemical weathering in Karkevagge（最初のaの頭に¨）. Analyses revealed that white coatings associated with streams emerging on the aluminum oxyhydroxide sulfate such as basaluminite [Al4(SO4)(OH)10・H2O]. Efflorescence on seasonal vegetation in stream channels demonstrates that this is an active process. The white coating chemistry exhibited no systematic spatial patterns along the valley axis or with position on the cliff face. Although the white coatings were not crystalline and did not contain appreciable amounts of Fe or Cs, in sheltered overhangs among boulders on the valley floor there were other well-crystallized secondary sulfate minerals commonly associated with pyrite oxidation, including gypsum, jarosite, and amorphous Fe compounds. This difference is due presumably to the pH of the associated waters, because Fe compounds tend to precipitate only at pH＜5, and Al compounds at pH＞5, which is the pH of the stream water. Pyrite oxidation nay be an important early weathering processes in this and in many other environments. However, it largely goes unrecognized because it occurs relatively rapidly in a geological sense and typically is only identified in recently disturbed landscapes associated with mining or other large-scale earth-moving activities. Karkevagge（最初のaの頭に¨） demonstrates that subarctic conditions do not preclude intense chemical weathering where conditions are favorable, but it does not establish that strong chemical weathering is a widespread attribute of subarctic conditions.

Keywords: weathering; pyrite; Sweden; Arctic; efflorescence; rock coating; scanning electron microscopy』

Introduction
　Research site
Methods and materials
　Sampling
　Scanning electron microscopy and elemental analyses
　X-ray diffraction
Results and discussions
　Scanning electron microscopy
　Chemistry
　Mineralogy
　Spatial patterns
　　Stream samples
　　Lake Rissajaure Dam site, Cave of Wonders
Conclusions
Acknowledgments
References cited