Petrogenesis of metamorphic rocks within a subduction-accretion terrane, Signy Island, South Orkney Islands

first_imgWhole‐rock and mineral analyses of polydeformed mica‐schist, quartzite, marble and amphibolite are presented from Signy Island, South Orkney Islands, part of the Scotia metamorphic complex. Whole‐rock chemistry suggests that the amphibolites are the metamorphosed equivalent of enriched tholeiitic and alkali basalts of an oceanic intraplate basalt series. These, together with limestones and Mn‐rich cherts of an oceanic island assemblage were tectonically mixed with trench or trench inner slope basin sediments in a subduction zone environment. Variation in mineral chemistry indicates an increase in temperature and decrease in pressure during metamorphism; pressures of 8 kbar and temperatures of approximately 545°C were reached during amphibolite facies metamorphism in the latter stages of deformation. These new data provide good evidence to support the previous interpretation of the Scotia metamorphic complex as a subduction complex.last_img read more

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A comparison of midlatitude Pi 2 pulsations and geostationary orbit particle injections as substorm indicators

first_imgBoth the injection of energetic particles at geostationary orbit and ground magnetic observations of Pi 2 wave activity are characteristic indicators of the onset of the substorm expansion phase. Occurrence statistics for the appearance of electron and proton particle injection at three geostationary spacecraft and for the detection of midlatitude magnetic Pi 2 pulsations in a 3-hour local time sector have been compiled from 240 hours of data. Throughout this interval a signature was detected on one or more of the instruments on average every 65 min. It is demonstrated that the detection of geostationary orbit particle injections and the detection of ground-based Pi 2 pulsations are correlated at a very high significance level, and that both appear to be effective substorm indicators. However, a small percentage of events (∼10% in each case) may be identified as a Pi 2 event but not as an injection event or viceversa, without any obvious explanation, such as the local time of the observing instrumentation. A number of possible explanations for the discrepancies between the two data sets are discussedlast_img read more

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Local and remote influences on the heat content of the Labrador Sea: an adjoint sensitivity study

first_imgThe Labrador Sea is one of the few regions on the planet where the interior ocean can exchange heat directly with the atmosphere via strong, localized, wintertime convection, with possible implications for the state of North Atlantic climate and global surface warming. Using an observationally‐constrained ocean adjoint model, we find that annual mean Labrador Sea heat content is sensitive to temperature/salinity changes (1) along potential source water pathways (e.g. the subpolar gyre, the North Atlantic Current, the Gulf Stream) and (2) along the West African and European shelves, which are not significant source water regions for the Labrador Sea. The West African coastal/shelf adjustment mechanism, which may be excited by changes in along‐shelf wind stress, involves pressure anomalies that propagate along a coastal waveguide towards Greenland, changing the across‐shelf pressure gradient in the North Atlantic and altering heat convergence in the Labrador Sea. We also find that non‐local (in space and time) heat fluxes (e.g. in the Irminger Sea, the seas south of Iceland) can have a strong impact on Labrador Sea heat content. Understanding and predicting the state of the Labrador Sea and its potential impacts on North Atlantic climate and global surface warming will require monitoring of oceanic and atmospheric properties at remote sites in the Irminger Sea, the subpolar gyre, and along the West African and European shelf/coast system, among others. Plain Language SummaryThere are only a handful of locations on Earth where natural processes can rapidly inject heat and carbon into the interior ocean, where it can remain for decades to centuries, potentially slowing global surface warming. One of these locations is the Labrador Sea, which features strong exchanges of heat with the atmosphere and exceptionally deep mixing between the surface ocean and interior ocean. In this paper, we examine the factors that influence the heat content of the Labrador Sea. Using a numerical model, we find that although the heat content is most sensitive to local exchanges with the atmosphere, there is an unexpected connection between the heat content of the Labrador Sea and wind strength along the coast of West Africa and Europe. Sustained changes in wind strength in those regions can change the large‐scale circulation of the entire North Atlantic, ultimately changing the amount of heat that gets transported into the Labrador Sea and potentially impacting North Atlantic climate and global surface warming.last_img read more

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Scoreboard roundup — 4/12/18

first_imgApril 13, 2018 /Sports News – National Scoreboard roundup — 4/12/18 FacebookTwitterLinkedInEmailiStock/Thinkstock(NEW YORK) —  Here are the scores from yesterday’s sports events:    AMERICAN LEAGUE Final  Cleveland    9  Detroit         3 Final  Boston       6  N-Y Yankees     3 Final  Minnesota    4  Chi White Sox   0 Final  L-A Angels   7  Kansas City     1NATIONAL LEAGUE Final  Pittsburgh      6  Chi Cubs     1 Final  St. Louis      13  Cincinnati   4 Final  Colorado        5  Washington   1 Final  San Francisco   7  San Diego    0    NATIONAL HOCKEY LEAGUE PLAYOFFS Final  Tampa Bay   5  New Jersey   2 Final  Boston      5  Toronto      1 Final OT  Columbus    4  Washington   3 Final  Nashville   5  Colorado     2 Final  San Jose    3  Anaheim      0Copyright © 2018, ABC Radio. All rights reserved. Beau Lundcenter_img Written bylast_img read more

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1-A/2-A All-Stars Rout 3-A All-Stars

first_img FacebookTwitterLinkedInEmailEPHRAIM, Utah-Friday, the 1-A and 2-A All-Stars met the 3-A All-Stars and the little guys showed their mettle, routing their larger counterparts 48-7 at Stoddard Field at Badger Stadium on the campus of Snow College.Gunnison signal-caller Kris Edwards completed 7 of 13 for 104 yards, 2 TD’s and and interception while Beaver’s Tyce Raddon ran for a 7-yard touchdown and his teammate, Walter LeBaron returned a fumble 25 yards for another score.It was only a 14-7 1-A/2-A All-stars lead at the half  but they exploded for 34 2nd half points en route to the easy victory.The 3-A All-Stars were also hurt by the absence of Juan Diego and Summit Academy players who appeared on the roster but were nowhere to be found just hours before kickoff.Juab’s Mcray Stevens was solid in the loss for the 3-A All-Stars, netting an interception.The regular season high school football schedule commences August 17, 10 weeks from this evening so stay tuned to the Mid-Utah Radio Sports Network and go to midutahradio.com for all the latest information. Written by Tags: Kris Edwards/McRay Stevens/Tyce Raddon/Walter LeBaron June 8, 2018 /Sports News – Local 1-A/2-A All-Stars Rout 3-A All-Stars Brad Jameslast_img read more

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Utah-BYU Rivalry Set For Saturday; Utah Declares a Red-Out

first_img FacebookTwitterLinkedInEmailSALT LAKE CITY-Saturday, BYU and Utah reconvene for the “Holy War,” as the teams meet for the 98th time in a series dating back to 1922.The Utes have dominated this series of late as they have won eight of the last nine overall and have an all-time series lead of 60-34-4.BYU’s athletic department considers this a 57-31-4 series lead for Utah as they do not acknowledge the years of athletic competition when the institution was known as “Brigham Young Academy.”The Cougars last defeated the Utes in 2009 and in Salt Lake City in 2006.The Utes lead the all-time series at Salt Lake City 39-17-3.Utah, fresh off of clinching a Pac-12 South title by virtue of Oregon’s 31-29 win over Arizona State Saturday, leads the nation in red zone defense as they only allow touchdowns on 59.4 percent of times the opponent gets inside their 20-yard line.The Utes are also fifth nationally in rushing defense (95.5 yards per game) and tied for sixth in the country in tackles for loss (8.1 such stops per game).This will be Utah’s Senior Day and 14 will be honored, including All-American candidates in punter Mitch Wishnowsky and kicker Matt Gay. In honor of the rivalry game, the Utah athletic department has declared this game a red-out and encourages all of the  Utes faithful to wear red attire.This senior class at Utah has gone 34-16 (.666) and 3-0 in bowl games.The Cougars come into this game at 6-5 and with the 45-10 win over New Mexico State last Saturday on their Senior Day, are now bowl eligible.In what has been a mercurial season for the Cougars, a win over their bitter rivals would leave a positive taste in the mouths of the BYU faithful. However, across the board in Las Vegas, the sports-books have made Utah a 13.5-point favorite as of Monday afternoon.You can listen to this game online at midutahradio.com, by clicking on the KSVC link or by listening to AM-980 and 100.5 FM. Tune in at 7:30 pm for the pregame show, followed by the 8:00 pm kickoff. November 19, 2018 /Sports News – Local Utah-BYU Rivalry Set For Saturday; Utah Declares a Red-Out Brad James Tags: Arizona State/BYU Football/Holy War/Las Vegas sportsbooks/Matt Gay/Mitch Wishnowsky/New Mexico State/Oregon/Pac-12 South/Utah Football Written bylast_img read more

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SUU Football Announces Dates For Spring Practice

first_imgFebruary 25, 2019 /Sports News – Local SUU Football Announces Dates For Spring Practice Written by Brad James FacebookTwitterLinkedInEmailCEDAR CITY, Utah-Monday, Southern Utah football head coach Demario Warren announced the dates for the team’s spring practices in 2019. The Thunderbirds will have 5:00 pm sessions March 20, 21 and 22, 27 and April 10. The Thunderbirds commence spring practices March 20 and will wrap them up April 13 with the annual spring game.center_img Tags: Demario Warren/Spring Game/SUU Football Times and details for the spring game will be announced at a later date. March 29, the Thunderbirds will practice at 5:15 and there are 5:10 pm sessions April 3 and 12. 5:30 pm sessions occur March 25, April 1 and 8.last_img read more

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BYU Football Travels To Face UMASS Saturday

first_img FacebookTwitterLinkedInEmailAMHERST, Mass.-Saturday, BYU football (6-4) plays its penultimate game of the regular season at Amherst, Mass. against the UMASS Minutemen (1-10), in this rare battle of FBS independents.Monday, BYU head coach Kalani Sitake was inked to a contract extension through 2023. He is currently 26-23 (.531) as the Cougars’ head coach, having been at the post since 2016.In Saturday’s successful 42-10 Senior Day win over FCS foe Idaho State, sophomore signal-caller Zach Wilson (19-31, 187 yards, 2 TD’s/INT) returned to the lineup, faring well against the Bengals.Wilson has now completed 61.7 percent of his passes on the season (127-206) for 1,499 yards, 7 touchdowns and 5 interceptions.With 102 rushing yards against Idaho State, freshman tailback Sione Finau (59 car, 359 yards, 2 TD’s) is the Cougars’ leading rusher on the season.Senior receiver Micah Simon (39 rec, 494 yards, 2 TD’s) is now BYU’s leading receiver on the season, having come on of late.Sophomore kicker Jake Oldroyd has made 14 of his 20 field goals on the season for the Cougars and 29 of his 30 PAT attempts.The Cougars average 27.7 points per game, ranking them 76th nationally in scoring offense.Defensively, the Cougars surrender 25.6 points per game, ranking them 51st nationally in scoring defense. They are tied with Michigan State and Oklahoma in scoring defense.Sophomore defensive lineman Lorenzo Fauatea has 2 sacks to pace the Cougars, while freshman linebacker Payton Wilgar has three interceptions to lead BYU in that category.In his first season as the Minutemen’s head coach, Walt Bell is currently 1-10 (.091).UMASS scores 19.4 points per game, ranking them 114th nationally.Redshirt sophomore quarterback Andrew Brito completes 54.7 percent of his passes (88 of 161) for 7 touchdowns and 6 interceptions for the Minutemen.The Minutemen’s running game is led by redshirt junior tailback Bilal Ally (140 car, 726 yards, 6 TD’s, 5.2 yards per carry).Freshman receiver Jermaine “OC” Johnson Jr. (35 rec, 281 yards, 2 TD’s) is UMASS’ leader in receptions. Redshirt senior tight end Kyle Horn (13 rec, 161 yards) is the team leader in scoring receptions (3) and yards per catch (12.4 yards).Redshirt senior kicker Cooper Garcia has made 6 of 8 field goal attempts and 27 of his 28 PAT’s on the season for the Minutemen.Defensively, UMASS is last nationally in scoring defense and total defense, ranking 130th by surrendering 52.4 points and 555.1 yards per game respectively.The Cougars lead the Minutemen 2-1 all-time, including 1-0 as the road team. Tags: BYU Football/Massachusetts Football Written by November 18, 2019 /Sports News – Local BYU Football Travels To Face UMASS Saturday Brad Jameslast_img read more

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Dixie State Men’s Basketball Bests Alaska-Fairbanks

first_img Written by November 24, 2019 /Sports News – Local Dixie State Men’s Basketball Bests Alaska-Fairbanks Tags: Dixie State men’s basketball Brad James FacebookTwitterLinkedInEmailSALT LAKE CITY-Saturday at Behnken Field House, the Dixie State Trailblazers bested Alaska-Fairbanks 90-78 as they improved to 5-0 in non-conference men’s basketball action.Dason Youngblood posted 27 points on 12-17 shooting for the Trailblazers in the win.Shadeed Shabazz had 28 points on 9-18 shooting and 8-8 on free throws for the Nanooks in defeat as they fell to 1-5.The Trailblazers are next in action Saturday at 7:30 pm against Westminster in the Rocky Mountain Athletic conference opener for both squads.last_img

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Chicago Trade’s For Jacksonville Quarterback Nick Foles

first_img Written by March 19, 2020 /Sports News – National Chicago Trade’s For Jacksonville Quarterback Nick Foles FacebookTwitterLinkedInEmailCarmen Mandato/Getty Images(CHICAGO) — The Chicago Bears have traded a compensatory fourth round pick to the Jacksonvile Jaguars for quarterback Nick Foles. Foles signed a four year, 91 million dollar contract, including just over 50 million guaranteed, with the Jaguars as a free agent last offseason. The money was the most guaranteed money in franchise history. Foles has already re-structured his contract with Chicago. It is now 3 years and 21 million dollars left on it, but he has the option to void it after this season or next, depending on the quality of his play. Last season did not go the way either the quarterback or the team wanted. Foles played just four games the entire season because of a broken collarbone he sustained on the 11th snap of the year. He missed the next eight games and returned in mid-November, but played poorly, throwing just two touchdowns in three games, before being benched for rookie Gardner Minshew.In Chicago, Foles will battle with fourth year quarterback Mitchell Trubisky for the starting spot. Trubisky threw for 3,148 yards and had 17 touchdown passes with 10 interceptions last season. His stats were a step back from the previous year when he threw for just over 3,200 yards and 24 touchdowns. Foles was drafted by the Eagles in 2012 before being traded to the Chiefs in 2015. In 2017, he re-signed with Philadelphia and won the Super Bowl MVP after leading the team to a title over New England after starting quarterback Carson Wentz tore his ACL in week 14.Copyright © 2020, ABC Audio. All rights reserved.center_img Beau Lundlast_img read more

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