BEGIN:VCALENDAR VERSION:2.0 PRODID:-//18.83.4.138//NONSGML kigkonsult.se iCalcreator 2.20// CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Oceans at MIT X-WR-CALDESC:Striving to understand\, harness and sustain Earth'\;s def ining frontier. X-FROM-URL:http://oceans.mit.edu X-WR-TIMEZONE:America/New_York BEGIN:VTIMEZONE TZID:America/New_York X-LIC-LOCATION:America/New_York BEGIN:STANDARD DTSTART:20171105T020000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RDATE:20181104T020000 TZNAME:EST END:STANDARD BEGIN:DAYLIGHT DTSTART:20180311T020000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:20170512T100000-n91e8qdrst0dg1c0kqh59dudk0@google.com DTSTAMP:20180503T093225Z CATEGORIES;LANGUAGE=en-US:MIT Seminar | PAOC Chemical Oceanography and Biog eochemistry CONTACT: DESCRIPTION:Identifying Traces of Primitive Life in Ancient Rocks\n\nThe ea rly life fossil record is based upon a limited\nnumber of often controvers ial graphitic microfossils.\nThe main complication resides in the poor\npr eservation of organic biosignatures in the\n(meta)sedimentary rock record. Biodegradation and\nfossilization processes\, as well as the increase of \ntemperature and pressure conditions during\ndiagenesis and metamorphism inevitably alter the\noriginal biochemical signatures of organic molecules .\nThus\, at a certain stage\, biogenic and abiotic organics\nmay become v ery difficult to distinguish.\nDuring this talk\, I will show how combinin g\ncharacterization of natural samples using advanced\nspectroscopic techn iques (STXM-based XANES &\nRaman microspectroscopies) and simulation of\nf ossilization processes in the laboratory sheds new\nlight on the potential preservation of microorganism\nmolecular biosignatures in ancient rocks. DTSTART;TZID=America/New_York:20170512T100000 DTEND;TZID=America/New_York:20170512T110000 LOCATION:Building E25\, Room 119 SEQUENCE:0 SUMMARY:COG3 Seminar – Julien Alleon (MIT) URL:http://oceans.mit.edu/event/cog3-seminar-julien-alleon-mit X-ALT-DESC;FMTTYPE=text/html:\\n\\n\\n\\n\\nIdentifying Trac es of Primitive Life in Ancient Rocks\n\nThe early life fossil record is b ased upon a limited\nnumber of often controversial graphitic microfossils. \nThe main complication resides in the poor\npreservation of organic biosi gnatures in the\n(meta)sedimentary rock record. Biodegradation and\nfossil ization processes\, as well as the increase of\ntemperature and pressure c onditions during\ndiagenesis and metamorphism inevitably alter the\norigin al biochemical signatures of organic molecules.\nThus\, at a certain stage \, biogenic and abiotic organics\nmay become very difficult to distinguish .\nDuring this talk\, I will show how combining\ncharacterization of natur al samples using advanced\nspectroscopic techniques (STXM-based XANES &\nR aman microspectroscopies) and simulation of\nfossilization processes in th e laboratory sheds new\nlight on the potential preservation of microorgani sm\nmolecular biosignatures in ancient rocks. END:VEVENT END:VCALENDAR