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X-WR-CALNAME:Atlanta Geological Society
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X-WR-CALDESC:Events for Atlanta Geological Society
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DTSTART;TZID=America/New_York:20220426T180000
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DTSTAMP:20220414T131157Z
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LAST-MODIFIED:20220414T131157Z
UID:2062-1650996000-1651003200@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:Title: Structure\, Geochemistry\, Geochronology\, and 2- and 3-dimensional strain analysis of the Long Island Creek Gneiss with proximity to the zone of most intense shearing in the Brevard Zone in western Georgia and eastern Alabama \nAbstract:  Two- and three-dimensional strain analysis of the Long Island Creek Gneiss (LICG) was conducted from natural exposures in western Georgia and eastern Alabama.  The LICG is typically a sphene (titanite)-epidote-biotite-quartz-feldspar gneissic granite that is medium- to coarse-grained and moderately- to well- foliated; locally the unit contains muscovite and microcline.  The outcrop belt of the LICG is one of the longest and most continuous exposures of gneissic granite in the region\, and is the most continuous lithology found within the Brevard Zone (BZ).  The LICG is a recognizable marker unit that has been mapped for ~140km along strike\, from Sandy Springs\, GA\, to southwest of Roanoke\, AL\, and is crossed by the zone of most intense shearing (ZIS) within the BZ.  The LICG and BZ are subparallel with a divergence/convergence angle of ~7 degrees. \nA total of 13 hand samples of the LICG were collected along the strike belt from Sandy Springs\, GA to Roanoke\, AL.  Strain analysis was conducted on the hand samples and the final ellipticity (Rf) and final orientation (ɸ) were calculated. The measured strain in the LICG generally decreases from Rf=3.3 near the ZIS to Rf=1.8 near Sandy Springs\, GA\, north of the ZIS. \nSamples of the LICG were collected from regions north\, south\, and within the ZIS\, and major\, minor\, trace elements\, and REEs were measured by ICP-OES and ICP-MS.  The geochemistry of these samples reveals a probable igneous protolith with a granite to granodiorite composition.  Discrimination diagrams show that half of these samples are A-type granites and the other half have an island arc signature \nThree samples of the LICG were ground and sieved for separation of zircons for U-Pb geochronology. Sample LIGC-1\, which is located south of the ZIS near Roanoke\, Alabama\, yielded an age of 449.41 ±0.83 Ma; this sample is very close to the Long Island Creek Fault\, south of the ZIS\, and just north of the Katy Creek Fault.  Sample LIGC-9\, which is located north of the ZIS near Campbellton\, Georgia\, yielded an age of 449.86 ±0.85 Ma\, and Sample LIGC-6\, which is located north of the ZIS near Sandy Springs\, Georgia\, yielded an age of 450.24 ±1.14 Ma. \n Speaker bio:  Randy Kath is professor of geology at West Georgia University. He has a Doctor of Philosophy in Geology from the Institute for the Study of Mineral Deposits at the South Dakota School of Mines and Technology\, and over 32 years’ experience in academic\, consulting and industry practice.  In addition to teaching engineering geology\, structural geology\, economic geology\, field geology and geologic mapping\, Dr. Kath is currently performing geologic mapping and structural interpretation at the 7.5-minute quadrangle scale in the Piedmont/Blue Ridge & Valley and Ridge provinces of northwest Georgia.  These geologic quadrangles are currently being used to identify mineral\, aggregate\, and groundwater resources by a variety of end users.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-7/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
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DTSTART;TZID=America/New_York:20220430T100000
DTEND;TZID=America/New_York:20220430T120000
DTSTAMP:20220426T195203Z
CREATED:20220426T195203Z
LAST-MODIFIED:20220426T195203Z
UID:2181-1651312800-1651320000@atlantageologicalsociety.org
SUMMARY:AGS PG Workshop
DESCRIPTION:Date: Saturday\, April 30\, 2022\nTime: 10:00 am until 12:00 pm\nPlace: Online webinar. For more information and link contact Abigail Knapp: abigail.s.knapp@gmail.com \nSpeaker: Benjamin Black\, PE\, PG\, CPG\, RPG\nBen has over 26 years of diverse experience in the field of engineering geology\, geological engineering\, mining\, and hydrogeology.  He has a BS in Geology from Eastern Michigan University and an MS in Geological Engineering from the University of Idaho\, and is a Professional Geologist in eight states and a Professional Engineer in seven states.  Ben is the owner of GeoLogic LLC\, a small geological and mining engineering firm headquartered in Marietta\, Georgia. \nSubject: Engineering Geology\nWorkshop topics will cover engineering soil\, geologic hazards\, site investigation\, engineering geological mapping\, rock testing\, rock mechanics\, and rock mass classification (time permitting).  Within each of these topics the lecturer will draw on his experience in the field of engineering geology and will use example problems to drive home points made in the discussion that are applicable to the Fundamentals and Practice of Geology exams.  At the end of the workshop there will be time to ask questions or make comments related to the workshop material. \nPlease join us and feel free to forward this announcement to anyone that might be interested. Two Professional Development Hours will be offered at this workshop\, which is open to current AGS members. Signing up for AGS Membership is easy and offers many benefits! For more information\, go to our web site at atlantageologicalsociety.org or visit us on Facebook.
URL:https://atlantageologicalsociety.org/event/ags-pg-workshop-2/
LOCATION:GA
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