HGS General & North American Dinner: Rice University Lecture- Sedimentary Records from Another World: Exploring Gale Crater Basin with the Curiosity Rover
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directions: Live Oak Room • Norris Conference Center • 816 Town and Country Blvd #210 "The Norris Conference Center is on the Second (2nd) Floor, and cannot be seen from the street. From Town and Country Blvd, turn west at Plaza Way and go past "Kendra Scott" store to STOP sign. Turn right = North and go to Level 3 of the parking structure.The parking structure can also be reached from the northbound Beltway 8 frontage road. Turn into the driveway that is 0.33 mi. north of Kimberley Ln., just before the Amegy Bank sign.
Social Hour 5:30–6:30 pm
Dinner 6:30–7:30 pm, Presentation 7:30- 9:00 pm
Member/Emeritus/Honorary Life: $40.00
Non-Member: $45.00 WALKSUPS: $45.00
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Speaker: Kirsten Siebach, Ph.D.
Company: Rice University
Sedimentary Records from Another World: Exploring Gale Crater Basin with the Curiosity Rover
The Mars Science Laboratory rover, Curiosity, landed on the floor of Gale crater, Mars, on August 5, 2012. In the last 5.5 years, Curiosity has traversed over 11 miles (18 km) to explore 1200 ft (370 m) of basin-fill stratigraphy exposed as layered sediments preserved around the craters’ central peak, a 16,000 ft (5 km) tall stack of sediments dubbed Mount Sharp.
Along with this traverse, Curiosity has not only collected tens of thousands of images of the Martian surface, but has also collected 500,000 laser shot-based chemistry analyses, 600 bulk chemistry analyses, and 15 drilled samples observed with both a mass spectrometer and an x-ray diffractometer, sending the data back to Earth on a daily basis. The instrument suite onboard Curiosity has enabled the highest resolution ever achieved in in-situ imaging of planetary surface samples, the first age date on another planet, ongoing chemostratigraphy based on multiple scales of compositional measurements, and ten robotic Martian selfies.
Selfie taken by Curiosity 1941 sols (Martian days) after landing, with sand dunes and Mount Sharp [NASA/JPL/MSSS].
Far beyond the numbers, Curiosity’s findings have revolutionized our understanding of Mars. Whereas it was once thought that Mars may have only had intermittent short-lived periods of relatively clement atmospheric conditions, Curiosity has investigated over 300 m of mudstone deposited in a lake of liquid water that would have had habitable conditions for life ~3.5 billion years ago, which seem to have been sustained for at least 3 million years. These lake (and associated fluvial and deltaic) sediments underwent multiple episodes of diagenesis, showing that groundwater was present for even longer durations. Furthermore, the presence of cemented sedimentary rocks above angular unconformities show that significant fractions of the 152-km-diameter crater were filled with water-cemented sediments and then largely evacuated by wind at least twice prior to ~3 billion years ago.
Simulation of lake in Gale crater [NASA/JPL].
Curiosity has also shown that early Mars had more igneous diversity than previously predicted, that eolian bedforms with distinct wavelengths form under different atmospheric conditions, and that Mars today has active sand dunes and seasonal variations in atmospheric methane.
Professor Siebach will present the developing story of the history of the Gale crater basin, and the basin analysis work she has done to understand source-to-sink processes by separating chemical effects from source rock diversity, sediment transport, and diagenetic influences for multiple sedimentary cycles.
816 Town & Country Blvd., Suite 210
Houston, TX 77024
|HGS member||$ 40.00|
|Emeritus/Honorary Life||$ 40.00|
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