Cosmogenic Chlorine-36 Production in Calcite by Muons

Stone, John O.; Evans, John; Fifield, L.K.; Allan, Geoff L.; Cresswell, Richard

doi:10.1016/s0016-7037(97)00369-4

Cited by 205 publications

(194 citation statements)

References 63 publications

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“…A series of calibration studies have established the spallogenic and muongenic 36 Cl production system in carbonate rocks [15][16][17][18]. Accordingly the 36 Cl production rates in this study were calculated based on the chemical compositions of the carbonate rock (Tables 2 and 3), and scaled by using geographic information (latitudes and altitudes) of individual locations.…”

Section: Resultsmentioning

confidence: 99%

“…Accordingly the 36 Cl production rates in this study were calculated based on the chemical compositions of the carbonate rock (Tables 2 and 3), and scaled by using geographic information (latitudes and altitudes) of individual locations. Subsequently, the 36 Cl-denudation rates of the carbonate rocks were calculated by an inverse analysis which is an iterative computation searching for the denudation rates that mostly match the observed 36 Cl concentrations [11,16]. As a result, the calculated 36 Cl-denudation rates in this study vary from 20 to 50 mm ka −1 ( Table 3).…”

Section: Resultsmentioning

confidence: 99%

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In-situ cosmogenic 36Cl denudation rates of carbonates in Guizhou karst area

Liu

Freeman

et al. 2013

Chin. Sci. Bull.

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This study quantifies surface denudation of carbonate rocks by the first application of in-situ cosmogenic 36 Cl in China. Concentrations of natural Cl and in-situ cosmogenic 36 Cl in bare carbonates from Guizhou karst areas were measured with isotope dilution by accelerator mass spectrometer. The Cl concentration varied from 16 to 206 ppm. The 36 Cl concentrations were in range of (0.8-2.4)10 6 atom g −1 , resulting in total denudation rates of 20-50 mm ka −1 that averaged over a 10 4 -10 5 a timescale. The 36 Cl-denudation rates showed roughly a negative correlation with the local mean temperature. This preliminary observation may suggest the variations of proportions of chemical weathering and physical erosion in denudation process, depending upon local climatic conditions. in-situ cosmogenic 36 Cl, denudation rate, climatic condition, carbonate, Guizhou Citation:Xu S, Liu C Q, Freeman S, et al. In-situ cosmogenic 36 Cl denudation rates of carbonates in Guizhou karst area.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

In-situ cosmogenic 36Cl denudation rates of carbonates in Guizhou karst area

Liu

Freeman

et al. 2013

Chin. Sci. Bull.

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“…The negative muon stopping rate profile with material depth is best fit by a 5th order polynomial (Stone et al, 1998). A pair of functions is therefore required to satisfactorily approximate 10 Be production by stopped negative muons over depths appropriate for surficial dating:…”

Section: Production Systematicsmentioning

confidence: 99%

New constraints on the late Cenozoic incision history of the New River, Virginia

et al. 2005

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The New River crosses the core of the ancient, tectonically quiescent Appalachian orogen as it follows its course through North Carolina, Virginia, and West Virginia. It is ideally situated to record the changes in geomorphic process rates that occur in the Appalachians as a response to late Cenozoic climate variations. Active erosion features on resistant bedrock that floors the river at prominent knickpoints demonstrate that the river is currently incising toward base level. However, large packages of alluvial fill and fluvial terraces cut into this fill record an incision history for the river that includes several periods of stalled downcutting and aggradation. Cosmogenic 10 Be exposure dating, aided by mapping and sedimentological examination of terrace deposits, is used to constrain the timing of events in this history. Fill-cut and strath terraces at elevations 10, 20, and 50 m above the modern river yield cosmogenic exposure ages of approximately 130, 610, and 955 ka, respectively, but uncertainties on these ages are not well-constrained. This translates to a long-term average incision rate of 43 m/my, which is comparable to rates measured elsewhere in the Appalachians. During specific intervals over the last 1 Ma, however, the New River's incision rate reached 97 m/my. Fluctuations between aggradation and rapid incision appear to be related to late Cenozoic climate variations, though uncertainties in modeled ages preclude direct correlation of these fluctuations to specific climate change events. Erosion rates on higher alluvial deposits adjacent to the river are estimated from 10 Be concentrations; these rates are very low, about 2 m/my or less. This demonstrates a disequilibrium in the modern landscape, with river incision greatly outpacing erosion from nearby landforms.

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“…Puerto Rico has a stable coastline (in the Quaternary); one coral was collected from the exposed last interglacial reef, which grew ϳ125,000 yr ago when sea level was ϳ6 m higher than today. Barbados is an uplifting coastline; one coral was collected from the last interglacial terrace at ϳ70 m elevation and two corals were collected from the penultimate interglacial terrace, one Nishiizumi et al (1989); 2: present work; 3: Stone et al (1996); 4: Stone et al (1998);5: Lal and Jull (1994). Gallup et al (1994).…”

Section: Samples and Methodsmentioning

confidence: 99%

“…For 10 Be and 26 Al, the scaling factors for other altitudes and latitudes can be obtained by using the scaling factors given by Lal (1991). For 36 Cl altitude scaling, especially for altitudes below sea level, one has to take into account the changes in the flux of slow muons (Stone et al, 1996(Stone et al, , 1998Heisinger et al, 2002); 36 Cl production rates can be estimated using these studies. The production rates of 10 Be, 26 Al and 36 Cl in corals at the respective latitude and altitude (Table 2) can be obtained by multiplying the nuclide production rates in Table 1 for latitudes Ն60°by factors of 0.833, 0.795, 0.804 and 0.807 for PR-3B, NU1493, NU1494 and WANC-93-1, respectively.…”

Section: Production Rates Of Useful Cosmogenic Radionuclides In Coralsmentioning

confidence: 99%