GP016
Speleothem magnetism: paleomagnetism, paleoclimate, paleoseismicity
Session ID#: 76005
Session Description:
Given their potential to provide continuous and precisely dated records, speleothems have been the material of choice for the paleoclimatic and paleohydrological reconstruction on continents. In the past decade, the study of their magnetism has also experienced a revival, due in part to improvements in instrument sensitivity allowing us to measure these weakly magnetic rocks, but also to significant advances in isotopic dating techniques. Recent studies of speleothems have improved our knowledge of geomagnetic excursions and the recent field. Likewise, the magnetic signals preserved within speleothems can be used to track changes in precipitation, soil dynamics above cave systems, flooding events and paleoseismicity recurrence rates. This session welcomes contributions on all topics related to speleothem magnetism, including the characterization of magnetic minerals and their variation through time, new geomagnetic, paleoenvironmental or paleoseismicity records, as well as methodological advances in the study of the magnetism of speleothems and cave sediments.
Index Terms:
1503 Archeomagnetism [GEOMAGNETISM AND PALEOMAGNETISM]
1512 Environmental magnetism [GEOMAGNETISM AND PALEOMAGNETISM]
1522 Paleomagnetic secular variation [GEOMAGNETISM AND PALEOMAGNETISM]
7221 Paleoseismology [SEISMOLOGY]
Primary Convener: Ricardo IF Trindade, IAG Institute of Astronomy, Geophysics and Atmospheric Sciences, Sao Paulo, Brazil
Convener: Joshua M Feinberg, University of Minnesota, Minneapolis, MN, United States
Primary Liaison: Ricardo IF Trindade, Universidade de São Paulo, Geophysics, São Paulo, Brazil
Quantifying ancient precipitation with annual resolution records of speleothem magnetism (Invited) (485774)
Roger R Fu, MIT-EAP Sciences, Cambridge, MA, United States, Kimberly Hess, Harvard University, Earth and Planetary Sciences, Cambridge, United States, Plinio Jaqueto, Universidade de São Paulo, Geophysics, Sao Paulo, Brazil and Ricardo IF Trindade, Universidade de São Paulo, Geophysics, São Paulo, Brazil
Intense decadal-scale wet episodes recorded by magnetic minerals in Soreq cave (Israel) Holocene stalagmites (Invited) (488717)
Ron Shaar1, Jonathan Keinan1, Yuval Burstyn1, Yael Ebert2, Avner Ayalon3, Miryam Bar-Matthews4 and Joshua M Feinberg5, (1)Hebrew University of Jerusalem, Jerusalem, Israel, (2)The Hebrew University of Jerusalem, Jerusalem, Israel, (3)Geological Survey of Israel, Jerusalem, Israel, (4)Geological Survey Israel, Jerusalem, Israel, (5)University of Minnesota, Minneapolis, MN, United States
Towards an understanding of magnetic mineralogy in speleothems from South America (560789)
Plinio Jaqueto1, Joshua M Feinberg2, Ricardo IF Trindade3, Janine Carmo3, Valdir Felipe Novello1, Nicolas M Strikis4, Francisco William Cruz Sr.5 and Ivo Karmann4, (1)USP University of Sao Paulo, São Paulo, Brazil, (2)University of Minnesota, Minneapolis, MN, United States, (3)Universidade de São Paulo, Geophysics, São Paulo, Brazil, (4)USP University of Sao Paulo, Sedimentary and Environmental Geology Department, São Paulo, Brazil, (5)Universidade de São Paulo, Instutit of geosciences, São Paulo, Brazil
Magnetic mapping of a speleothem from Tongatapu, Kingdom of Tonga with a scanning SQUID microscopy and its magnetic mineralogy (563863)
Naoto Fukuyo1, Hirokuni Oda2, Geoffrey Clark3 and Yusuke Yokoyama1, (1)Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan, (2)National Institute of Advanced Industrial Science and Technology (AIST), Geological Survey of Japan, Tsukuba, Japan, (3)Archaeology and Natural History, College of Asia and the Pacific, The Australian National University, Canberra, Australia
Speleothem derived secular variation in Morocco for the past 6000 years (591614)
Janine Carmo1, Ricardo IF Trindade1, Plinio Jaqueto2, Francisco William Cruz Sr.3, Yassine Ait Brahim4 and Hai Cheng5, (1)Universidade de São Paulo, Geophysics, São Paulo, Brazil, (2)Universidade de São Paulo, Geophysics, Sao Paulo, Brazil, (3)Universidade de São Paulo, Instutit of geosciences, São Paulo, Brazil, (4)Xi'an Jiaotong University, Xi'an, China, Xi'an, China, (5)University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States
Feasibility Study of Microbialites as Paleomagnetic Recorders (600212)
ji-In Jung1, Julie A Bowles1, Josh M Marquardt2 and Eli Sutula1, (1)University of Wisconsin Milwaukee, Geosciences, Milwaukee, WI, United States, (2)University of Utah, Geology and Geophysics, Salt Lake City, UT, United States
Accessing High-resolution Magnetic Records in Speleothems (605381)
Eduardo A. Lima, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Cambridge, MA, United States, Ioan Lascu, Smithsonian Institution, Washington DC, United States, Joshua M Feinberg, University of Minnesota, Minneapolis, MN, United States and Benjamin P Weiss, MIT, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
Magnetic detection of paleoflood layers in stalagmites and implications for historical land use changes (607987)
Joshua M Feinberg, Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN, United States, Ioan Lascu, Smithsonian Institution, Washington DC, United States, Eduardo A. Lima, MIT-Earth & Planetary Sciences, Cambridge, MA, United States, Benjamin P Weiss, MIT, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Jeffrey A Dorale, University of Iowa, Iowa City, IA, United States, E. Calvin Alexander Jr, University of Minnesota Twin Cities, Minneapolis, MN, United States and R. Lawrence Edwards, Nanjing Normal University, Dept. of Geography, Nanjing, China
