干旱区生态环境知识资源中心(Arid): Rock varnish in La Proveedora/Sonora in the context of desert geobiological processes and landscape evolution

Arid

DOI	10.1016/j.jsames.2020.102959
	Rock varnish in La Proveedora/Sonora in the context of desert geobiological processes and landscape evolution
	Martinez-Pabello, Pavel U.; Sedov, Sergey; Solleiro-Rebolledo, Elizabeth; Sole, Jesus; Pi-Puig, Teresa; Alcantara-Hernandez, Rocio J.; Lebedeva, Marina; Shishkov, Vasily; Villalobos, Cesar
通讯作者	Martinez-Pabello, PU (corresponding author), Univ Nacl Autonoma Mexico, Inst Geol, Mexico City, DF, Mexico.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	105
英文摘要	Desert varnish is a dark microlayer that forms on rocky surfaces that is usually associated with arid and desert environments. It consists mainly of clay minerals (60%), while the rest are Fe and Mn oxides. Growth rates are very slow and vary from <1 to 40 mu m/ky. Although different proposals exist to explain their formation mechanisms, these processes are still unknown. Around the world, various groups and human communities have created petroglyphs with different meanings in desert varnish. In the Sonoran Desert, the archaeological site La Proveedora is known for having many petroglyphs made in granite rock varnishes. It is believed that people groups occupied the area during the mid-Holocene (ca 5000-3000 BC). The research was carried out by analyzing and looking for possible signals and contributions from past environments and current processes that are preserved in the varnish layers. The X-ray diffraction, laser breakdown spectra and scanning electron microscopy with energy dispersive spectroscopy analyses in varnish samples, showed that the distribution and concentrations of Fe and Mn exhibit an alternating behavior on a depth scale from the surface until contact with granite. The DNA analysis showed a major presence of the Proteobacteria and Actinobacteria groups. Notably, some of these microorganisms can incorporate Fe and Mn into their metabolic processes and mobilize them through the varnish for its formation. The C-14 radiocarbon dating (370 +/- 54 cal BP) indicates a very young age associated primarily with recent microorganisms. However, a first approximation was obtained for the minimum age (50001000 yr BP). The comparison between the areas of varnish and the surfaces within the petroglyphs suggests that the varnish formation occurred under conditions in the past when the humidity was higher, and that it is probably a very slow, intermittent or uncoated formation mechanism today.
英文关键词	Desert varnish Sonoran desert Petroglyph Fe and Mn oxides
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000606797300005
WOS关键词	NEGEV DESERT ; BACTERIAL COMMUNITIES ; MOJAVE DESERT ; NW SONORA ; SOIL ; MASS ; MEXICO ; DUST ; SPECTROSCOPY ; PLEISTOCENE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
来源机构	Universidad Nacional Autónoma de México
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348040
作者单位	[Martinez-Pabello, Pavel U.; Sedov, Sergey; Solleiro-Rebolledo, Elizabeth; Alcantara-Hernandez, Rocio J.] Univ Nacl Autonoma Mexico, Inst Geol, Mexico City, DF, Mexico; [Sole, Jesus; Pi-Puig, Teresa] Univ Nacl Autonoma Mexico, Natl Lab Geochem & Minerol, Mexico City, DF, Mexico; [Lebedeva, Marina] VV Dokuchaev Soil Sci Inst, Pyzhevski Lane 7, Moscow 109017, Russia; [Shishkov, Vasily] Russian Acad Sci, Inst Geog, Starornonetnyi Per 29, Moscow 109017, Russia; [Villalobos, Cesar] Univ Nacl Autonoma Mexico, Inst Anthropol Res, Mexico City, DF, Mexico
推荐引用方式 GB/T 7714	Martinez-Pabello, Pavel U.,Sedov, Sergey,Solleiro-Rebolledo, Elizabeth,et al. Rock varnish in La Proveedora/Sonora in the context of desert geobiological processes and landscape evolution[J]. Universidad Nacional Autónoma de México,2021,105.
APA	Martinez-Pabello, Pavel U..,Sedov, Sergey.,Solleiro-Rebolledo, Elizabeth.,Sole, Jesus.,Pi-Puig, Teresa.,...&Villalobos, Cesar.(2021).Rock varnish in La Proveedora/Sonora in the context of desert geobiological processes and landscape evolution.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,105.
MLA	Martinez-Pabello, Pavel U.,et al."Rock varnish in La Proveedora/Sonora in the context of desert geobiological processes and landscape evolution".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 105(2021).