# Weinan, China 140KYr Loess Physical Properties Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:15109 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/loess/china/kang2013weinan-carb-dens.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Loess #-------------------- # Contribution_Date # Date: 2013-09-25 #-------------------- # Title # Study_Name: Weinan, China 140KYr Loess Physical Properties Data #-------------------- # Investigators # Investigators: Kang, S.; Wang, X.; Lu, Y. #-------------------- # Description_and_Notes # Description: Physical properties data (magnetic susceptibility, mean grain size, carbonate content, bulk density) # from the Weinan section (34°25'38.8"N, 109°34'37.4"E, elevation 660 m a.s.l.) in the central part of a 'Yuan' # (stable loess tableland) at the southeastern margin of the Chinese Loess Plateau. # # A 14-m pit along the outcrop, recently made by a brickyard, was excavated at the Weinan section. Powder samples # were collected at 2-cm intervals above the depth of 14.3 m for magnetic susceptibility and grain size analyses. # Luminescence samples were taken at 10-cm intervals above the depth of 1.4 m and at 20-cm intervals for the remainder. # A total of 76 luminescence samples were obtained for OSL and ReOSL dating, and all OSL and ReOSL dates except those # from the uppermost three samples were used for chronology construction using a five-point FFT smoothing method. # # #-------------------- # Publication # Authors: Shugang Kang, Xulong Wang, Yanchou Lu # Published_Date_or_Year: 2013-10-01 # Published_Title: Quartz OSL chronology and dust accumulation rate changes since the Last Glacial at Weinan on the southeastern Chinese Loess Plateau # Journal_Name: Boreas # Volume: 42 # Edition: # Issue: 4 # Pages: 815-829 # DOI: 10.1111/bor.12005 # Online_Resource: http://onlinelibrary.wiley.com/doi/10.1111/bor.12005/abstract # Full_Citation: # Abstract: The fine-grained (4-11 um) quartz Optically Stimulated Luminescence (OSL) dating technique was applied to the Weinan section on the southeastern Chinese Loess Plateau (CLP) with a high luminescence sampling resolution (10- and 20-cm intervals). Fifty-eight OSL ages, spanning c. 1-74 ka, were obtained for the 10-m loess-palaeosol sequences. The reliability of the OSL dating and the constructed chronology was confirmed by comparing the OSL ages with independent dates from other studies and by correlation with palaeoclimatic time series. The closely spaced OSL ages at Weinan indicate that the mean dust accumulation rate (DAR) of L1-1 (MIS 2, 7.0±0.9 cm ka-1) is lower than those of L1-3 (MIS 4, 19.1±6.1 cm ka-1) and L1-2 (MIS 3, 16.0±0.7 cm ka-1) and that the mean DAR c. 30-20 ka ago (11.4±2.4 cm ka-1) is higher than that c. 20-10 ka ago (3.0±0.1 cm ka-1) in L1-1. The subsequent calculation of the mass accumulation rate (MAR) indicates that the MAR of L1-1 (107 g m-2 a-1) is much lower than those of L1-2 (247 g m-2 a-1) and L1-3 (307 g m-2 a-1). By comparing the mean DAR results during the Last Glacial at Weinan with those at a further six sites from other studies, we observed that the mean DAR of L1-2 is higher (lower) than that of L1-1 on the eastern (western) CLP, and that the mean DAR during MIS 2 has an evident transition from high to low at c. 20 ka on the entire CLP. Possible mechanisms for the above mean DAR changes at orbital and sub-orbital time scales are presented. #------------------ # Publication # Authors: Shugang Kang, Yanchou Lu, Xulong Wang # Published_Date_or_Year: 2011-10-01 # Published_Title: Closely-spaced recuperated OSL dating of the last interglacial paleosol in the southeastern margin of the Chinese Loess Plateau # Journal_Name: Quaternary Geochronology # Volume: 6 # Edition: # Issue: 5 # Pages: 480-490 # DOI: 10.1016/j.quageo.2011.04.004 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S1871101411000240 # Full_Citation: # Abstract: The objective of this study is to construct a numerically dated chronology of the last interglacial paleosol (S1) in Chinese loess using luminescence dating. The recuperated optically stimulated luminescence (ReOSL) dating approach was applied to 18 closely-spaced (20 cm intervals) samples, with 15 of these collected from the S1 unit at the Weinan site, which is located at the southeastern margin of the Chinese Loess Plateau (CLP). By using the multiple-aliquot regenerative-dose (MAR) approach, 18 fine-grained quartz ReOSL equivalent dose (DE) values, spanning about 249-466 Gy, were obtained. The validity of ReOSL MAR protocol was checked by dose recovery measurements and recycling ratio tests. By comparison of the dose-response curves of all the samples, we found that it is feasible to construct a standardized growth curve (SGC) for the ReOSL signal at the Weinan site. Considering the effects of pedogenesis of the S1 unit during formation, the dose rate during the last interglacial was corrected, which should be beneficial for constructing a more reliable chronology. Finally, a detailed chronology of the S1 unit was established. The results show that S1 was deposited between approximately 76-127 ka, which confirms the early suggestion that the S1 unit in Chinese loess corresponds to the whole marine oxygen-isotope stage (MIS) 5. The detailed ReOSL chronology of S1 indicates the consistency of the substrata of S1 with MIS 5a-e, but cannot determine whether they are exactly coeval. According to the present ReOSL age results, it is suggested that dust deposition is continuous at timescales larger than 14.1 ± 11.8 ky during the last interglacial and there is no hiatus longer than 4.4 ± 13.0 ky at the L2/S1 transition. Further work, e.g. minimizing the errors on ages and reducing the luminescence sampling intervals, is needed to understand the more detailed dust deposition conditions during the last interglacial in Chinese loess. #------------------ # Funding_Agency # Funding_Agency_Name: National Natural Science Foundation of China # Grant: 41102116, 40972124 #------------------ # Funding_Agency # Funding_Agency_Name: Chinese Academy of Sciences # Grant: KZZD-EW-04-06-03, XDA05120402, West Light Foundation #------------------ # Funding_Agency # Funding_Agency_Name: State Key Laboratory of Loess and Quaternary Geology # Grant: IEECAS (ZYSQ0807) #------------------ # Site_Information # Site_Name: Weinan # Location: Asia>Eastern Asia>China # Country: China # Northernmost_Latitude: 34.4274 # Southernmost_Latitude: 34.4274 # Easternmost_Longitude: 109.5771 # Westernmost_Longitude: 109.5771 # Elevation: 660 m #------------------ # Data_Collection # Collection_Name: Kang2013WeinanCarb-Dens # Earliest_Year: 140000 # Most_Recent_Year: 0 # Time_Unit: Calendar Years Before Present # Core_Length: 14.0 m # Notes: #------------------ # Chronology: # # # Kang et al. 2011, 2013 Weinan OSL and ReOSL Ages Data # # Due to the possible anthropogenic disturbances for samples WN0, WN10 and WN20, the OSL ages of these samples # were excluded for the chronology construction. The rest 73 OSL and ReOSL dates were used for chronology construction # using a five-point FFT smoothing method. # # Samples from 1360-1020 and 1000-0 cm were measured using the fine-grained quartz ReOSL and OSL dating approaches, respectively. # Dose rates and ages for samples from 1360-1060 cm were corrected for pedogenesis effect. # # Column 1: Sample No. # Column 2: Depth (cm) # Column 3: U (ppm) # Column 4: Th (ppm) # Column 5: K (%) # Column 6: Water Content (%) # Column 7: Dose Rate (Gy/ka) (Corrected for the lower 16 samples) # Column 8: Dose (Gy) # Column 9: Age (ka) (Corrected for the lower 16 samples) # # # Sample No. Depth (cm) U (ppm) Th (ppm) K (%) Water Content (%) Dose rate (Gy/ka) Dose (Gy) Age (ka) # WN0 0 2.75±0.15 11.99±0.26 1.97±0.02 19±5 3.51±0.18 2.7±0.1 0.8±0.0 # WN10 10 2.42±0.13 12.25±0.27 1.97±0.02 19±5 3.75±0.18 2.5±0.1 0.7±0.0 # WN20 20 2.65±0.13 12.77±0.28 2.01±0.02 19±5 3.89±0.19 2.5±0.0 0.6±0.0 # WN30 30 2.46±0.14 13.18±0.29 2.04±0.02 20±5 3.82±0.18 11.0±0.2 2.9±0.1 # WN40 40 2.19±0.13 12.72±0.28 2.10±0.02 21±5 3.72±0.18 20.5±0.2 5.5±0.3 # WN50 50 2.71±0.15 13.89±0.31 2.12±0.02 22±5 3.92±0.19 30.9±0.3 7.9±0.4 # WN60 60 2.55±0.15 13.37±0.29 2.13±0.02 22±5 3.88±0.19 35.5±0.3 9.1±0.4 # WN70 70 2.29±0.13 12.16±0.27 2.11±0.02 22±5 3.61±0.17 36.4±0.8 10.1±0.5 # WN80 80 2.36±0.14 11.79±0.26 2.09±0.02 22±5 3.65±0.17 35.7±0.9 9.8±0.5 # WN90 90 2.57±0.15 12.97±0.29 2.11±0.02 22±5 3.81±0.18 35.5±0.7 9.3±0.5 # WN100 100 2.63±0.14 12.60±0.28 2.12±0.02 20±5 3.82±0.18 35.0±0.3 9.2±0.4 # WN110 110 2.29±0.14 11.66±0.26 1.92±0.02 20±5 3.52±0.17 36.2±0.5 10.3±0.5 # WN120 120 2.48±0.13 10.53±0.23 1.83±0.02 18±5 3.47±0.17 48.9±1.4 14.1±0.8 # WN130 130 2.26±0.12 10.58±0.23 1.81±0.02 18±5 3.37±0.17 56.9±0.5 16.9±0.8 # WN140 140 2.18±0.13 10.45±0.23 1.83±0.02 17±5 3.38±0.17 69.2±0.9 20.5±1.1 # WN160 160 2.36±0.12 11.14±0.25 1.81±0.02 17±5 3.48±0.17 79.0±1.2 22.7±1.2 # WN180 180 2.31±0.15 10.68±0.23 1.81±0.02 17±5 3.39±0.17 73.0±1.0 21.5±1.1 # WN200 200 2.54±0.14 10.67±0.23 1.79±0.02 16±5 3.51±0.18 88.4±1.1 25.2±1.3 # WN220 220 2.52±0.14 11.09±0.24 1.82±0.02 17±5 3.52±0.18 90.1±1.1 25.6±1.3 # WN240 240 2.30±0.13 11.01±0.24 1.85±0.02 16±5 3.51±0.18 106.3±1.4 30.3±1.6 # WN260 260 2.55±0.16 11.26±0.25 1.88±0.02 16±5 3.62±0.19 110.3±1.0 30.5±1.6 # WN280 280 2.33±0.13 11.28±0.25 1.92±0.02 16±5 3.59±0.18 114.2±3.3 31.8±1.8 # WN300 300 2.09±0.13 11.23±0.25 1.95±0.02 16±5 3.56±0.18 121.6±1.2 34.2±1.8 # WN320 320 2.52±0.14 11.84±0.26 1.97±0.02 17±5 3.70±0.19 124.1±1.5 33.5±1.7 # WN340 340 2.46±0.15 11.13±0.24 1.98±0.02 17±5 3.65±0.19 131.0±3.2 35.9±2.0 # WN360 360 2.36±0.14 11.63±0.26 1.99±0.02 18±5 3.62±0.18 134.7±2.1 37.3±2.0 # WN380 380 2.36±0.13 11.25±0.25 1.99±0.02 18±5 3.60±0.18 134.9±1.0 37.5±1.9 # WN400 400 2.35±0.13 11.18±0.25 2.00±0.02 18±5 3.56±0.18 142.1±1.0 39.9±2.0 # WN420 420 2.17±0.13 10.73±0.24 2.03±0.02 18±5 3.52±0.18 140.7±3.6 40.0±2.2 # WN440 440 2.28±0.15 12.24±0.26 2.05±0.02 19±5 3.65±0.18 160.2±4.5 43.9±2.5 # WN460 460 2.38±0.15 11.75±0.26 2.05±0.02 19±5 3.62±0.18 164.6±5.8 45.5±2.8 # WN480 480 2.51±0.15 12.09±0.27 2.05±0.02 19±5 3.69±0.18 173.7±7.0 47.1±3.0 # WN500 500 2.23±0.13 11.09±0.24 2.02±0.02 19±5 3.50±0.17 165.0±5.7 47.1±2.9 # WN520 520 2.55±0.14 11.57±0.25 2.03±0.02 18±5 3.69±0.19 171.1±7.0 46.3±3.0 # WN540 540 2.51±0.15 12.37±0.27 2.02±0.02 17±5 3.77±0.19 165.5±2.6 43.9±2.3 # WN560 560 2.64±0.14 12.32±0.26 2.01±0.02 18±5 3.73±0.19 169.9±1.4 45.5±2.3 # WN580 580 2.38±0.14 12.24±0.27 1.99±0.02 19±5 3.60±0.18 181.3±3.7 50.4±2.7 # WN600 600 2.61±0.14 12.25±0.26 1.97±0.02 19±5 3.67±0.18 170.3±3.5 46.5±2.5 # WN620 620 2.94±0.15 12.66±0.28 1.97±0.02 19±5 3.79±0.19 195.8±5.2 51.6±2.9 # WN640 640 2.81±0.15 12.73±0.28 1.87±0.02 19±5 3.69±0.19 199.2±4.0 54.1±2.9 # WN660 660 2.88±0.14 11.09±0.24 1.88±0.02 18±5 3.59±0.18 204.6±4.2 57.0±3.1 # WN680 680 2.70±0.14 13.31±0.28 1.96±0.02 18±5 3.82±0.19 217.9±4.5 57.0±3.1 # WN700 700 2.60±0.15 12.59±0.26 1.94±0.02 19±5 3.65±0.18 222.1±4.7 60.9±3.3 # WN720 720 2.79±0.17 12.42±0.27 1.97±0.02 16±5 3.85±0.20 222.8±5.7 57.8±3.4 # WN740 740 2.89±0.16 12.06±0.27 1.93±0.02 18±5 3.72±0.19 210.7±2.8 56.7±3.0 # WN760 760 3.19±0.16 11.68±0.26 1.83±0.02 20±5 3.62±0.18 224.1±4.5 61.9±3.4 # WN780 780 2.91±0.15 12.05±0.27 1.88±0.02 19±5 3.64±0.18 239.0±3.1 65.7±3.4 # WN800 800 3.05±0.14 11.11±0.24 1.73±0.02 22±5 3.40±0.17 236.8±2.8 69.8±3.5 # WN820 820 2.90±0.15 10.29±0.23 1.75±0.02 21±5 3.28±0.16 229.8±2.2 70.1±3.5 # WN840 840 3.10±0.15 10.69±0.24 1.75±0.02 20±5 3.42±0.17 251.1±4.1 73.5±3.9 # WN860 860 3.02±0.15 11.63±0.26 1.87±0.02 22±5 3.54±0.18 259.1±3.2 73.2±3.7 # WN880 880 2.89±0.18 12.47±0.27 1.92±0.02 21±5 3.62±0.18 255.1±4.4 70.4±3.8 # WN900 900 3.14±0.19 11.76±0.26 1.86±0.02 22±5 3.61±0.18 272.7±3.8 75.5±4.0 # WN920 920 3.54±0.18 11.46±0.25 1.86±0.02 23±5 3.61±0.18 273.5±5.4 75.7±4.0 # WN940 940 3.23±0.16 12.45±0.26 1.89±0.02 24±5 3.54±0.17 246.5±3.2 69.6±3.5 # WN960 960 3.54±0.17 13.00±0.27 1.91±0.02 26±5 3.70±0.18 267.4±9.8 72.2±4.4 # WN980 980 3.47±0.18 13.04±0.29 1.93±0.02 25±5 3.73±0.18 276.5±4.7 74.0±3.8 # WN1000 1000 2.91±0.15 12.78±0.27 1.97±0.02 23±5 3.61±0.18 267.7±3.0 74.2±3.7 # WN1020 1020 3.07±0.15 11.25±0.25 1.75±0.02 24±5 3.35±0.16 249.2±6.5 74.4±4.1 # WN1040 1040 3.20±0.15 13.10±0.28 1.94±0.02 28±5 3.53±0.17 266.1±7.7 75.5±4.2 # WN1060 1060 2.58±0.14 12.64±0.27 1.95±0.02 25±5 3.40±0.16 284.9±8.1 83.1±6.9 # WN1080 1080 3.04±0.20 13.31±0.29 1.97±0.02 29±5 3.29±0.16 304.6±9.2 87.9±7.5 # WN1100 1100 3.03±0.19 14.24±0.31 1.98±0.02 29±5 3.36±0.16 318.7±4.6 89.9±7.1 # WN1120 1120 3.26±0.17 14.55±0.31 2.00±0.02 28±5 3.36±0.16 326.1±9.4 89.8±7.6 # WN1140 1140 2.70±0.16 13.79±0.29 2.01±0.02 29±5 3.15±0.15 337.9±6.2 99.3±7.7 # WN1160 1160 2.90±0.15 14.01±0.29 1.99±0.02 27±5 3.21±0.15 325.6±7.7 93.2±7.7 # WN1180 1180 3.00±0.17 14.65±0.31 1.97±0.02 27±5 3.31±0.16 350.5±8.1 98.8±7.9 # WN1200 1200 3.01±0.17 14.86±0.33 1.95±0.02 27±5 3.35±0.16 365.4±8.5 101.4±8.1 # WN1220 1220 2.51±0.18 14.03±0.29 1.92±0.02 29±5 3.06±0.15 377.2±9.6 115.5±8.7 # WN1240 1240 2.90±0.17 13.84±0.29 1.93±0.02 29±5 3.11±0.15 391.3±8.1 117.7±8.5 # WN1260 1260 2.95±0.16 14.93±0.31 1.90±0.02 28±5 3.24±0.15 384.2±7.2 111.0±8.2 # WN1280 1280 3.28±0.18 15.05±0.32 1.94±0.02 28±5 3.37±0.16 403.2±4.8 111.6±8.1 # WN1300 1300 2.93±0.16 14.12±0.30 1.97±0.02 29±5 3.22±0.15 419.7±11.2 123.0±8.9 # WN1320 1320 3.09±0.18 14.47±0.30 1.98±0.02 29±5 3.25±0.16 443.6±12.4 127.4±9.4 # WN1340 1340 3.37±0.19 13.25±0.29 2.02±0.02 26±5 3.33±0.16 451.4±9.5 127.0±9.1 # WN1360 1360 2.88±0.16 12.76±0.27 2.05±0.02 25±5 3.23±0.16 466.2±10.5 136.5±9.6 # # # #---------------- # Variables # # Data variables follow (have no #) # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) depth_cm depth, , , cm, , , , ,N carb% Calcium Carbonate percent, , , percent, , , , ,N dbd Dry Bulk Density, , , (g/cm^3), , , , ,N #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: depth_cm carb% dbd 0 5.8 10 5.3 1.81 20 4.3 1.84 30 1.8 1.81 40 2.3 1.65 50 2.3 1.83 60 2.4 1.83 70 2.4 1.78 80 1.4 1.80 90 2.3 1.64 100 1.9 1.66 110 13.6 1.65 120 16.5 1.54 130 20.0 1.56 140 19.5 1.51 150 17.0 160 20.0 1.56 170 20.5 180 18.9 1.49 190 19.5 200 15.0 1.47 210 10.7 220 18.1 1.44 230 18.0 240 15.1 1.54 260 17.0 1.61 280 15.1 1.45 300 14.1 1.47 320 11.7 1.44 340 12.7 1.55 360 11.7 1.44 380 12.6 1.60 400 10.7 1.53 420 10.7 1.40 440 9.7 1.42 460 11.1 1.49 480 9.2 1.47 500 11.2 1.49 520 9.2 1.53 540 10.7 1.53 560 12.7 1.50 580 11.2 1.52 600 11.2 1.55 620 11.0 1.58 640 12.1 1.56 660 12.6 1.62 680 8.4 1.66 700 7.7 1.62 720 7.0 1.64 740 5.5 1.65 760 12.8 1.55 780 12.4 1.63 800 20.8 1.57 820 17.2 1.64 840 20.8 1.66 860 13.4 1.62 880 12.5 1.61 900 15.8 1.58 920 14.3 1.59 940 12.8 1.56 960 13.4 1.60 980 11.4 1.55 1000 10.8 1.56 1020 23.2 1040 12.9 1060 10.9 1080 6.0 1100 5.5 1120 3.0 1140 2.5 1160 2.0 1180 3.0 1200 2.5 1220 2.5 1240 2.0 1260 2.5 1280 2.0 1300 2.5 1320 0.5 1340 1.5 1360 2.5 1380 2.1 1400 2.5