# NOAA Paleoclimatology Program - Speleothem Site Data # cave-jiuxian-c996-2.txt # Speleothem data only # File Created: 22-March-2011 # #********************************************************************************* # Please cite the contributor and the original publications when using these data #********************************************************************************* # # Missing Values indicated by '-999' # # PI: Y. Cai # Core/Site: C996-2/Jiuxian Cave # Latitude: 33°34' N # Longitude: 109°6' E # Elevation: 1495 m # # Publications: # Cai, Y., L. Tan, H. Cheng, Z. An, R.L. Edwards, M.J. Kelly, # X. Kong, and X. Wang. 2010. # The variation of summer monsoon precipitation in central China # since the last deglaciation. # Earth and Planetary Science Letters, 291, 21-31, # doi:10.1016/j.epsl.2009.12.039 # #------------------ # # Description & Notes: # Oxygen isotope data and U-Th dates from two stalagmites collected in # 1999 near the end of Jiuxian Cave, Shaanxi Province, central China. # stalagmite C996-2 is ~21 cm in height and 6-9 cm in diameter. # Fifteen 230Th C996-2, respectively. The chronologies show that C996-2 # grew through the past 19.0 ka BP, excluding two hiatuses between # 8.3 and 5.7 ka BP, and 15.4 and 11.9 ka BP. Temporal resolutions # for the d18O measurements vary from 36 to 112 years for C996-2. # #------------------ # # 230Th dating # 230Th dating results of two stalagmites from Jiuxian cave by ICP-MS. The error is 2sigma error. # Lambda230=9.1577×10-6 year-1, Lambda234=2.8263×10-6 year-1 (Cheng et al., 2000), Lambda238=1.55125×10-10 year-1 # (Jaffey et al., 1971). # Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4±2.2×10-6. Those are the values # for a material at secular equilibrium, with the bulk earth 232Th/238U value of 3.8. The errors are arbitrarily # assumed to be 50%. # # Sample number Depth 238U 232Th d234U*a 230Th/238U Age(kaBP)*c Age(kaBP)*c d234U Initial*b # mm ppb ppt measured activity uncorrected corrected corrected # Stalagmite C996-2 # # MC-43 6–8.5 313.3±0.6 1334±7 316±2 0.0053±0.0002 0.42±0.02 0.27±0.05 316±2 # C996-2-2 31–33 585.4±1.5 3028±27 314±3 0.0102±0.0002 0.85±0.02 0.68±0.06 315±3 # C996-2-6A 40–42 276.0±0.7 29,864±211 323±5 0.0433±0.0052 3.63±0.44 1.17±1.29 324±5 # C996-2-1 53–55 264.6±0.6 2312±28 326±3 0.0235±0.0006 1.95±0.05 1.71±0.11 328±3 # C996-2-4A 82–84 292.7±0.9 28,929±85 298±6 0.0657±0.0023 5.66±0.20 3.38±1.15 301±6 # C996-2-3 96.5–99.5 220.8±0.6 13,535±77 293±4 0.0664±0.0021 5.75±0.18 4.31±0.72 296±4 # C996-2-3A 102–103 190.7±0.6 7840±31 281±6 0.0679±0.0018 5.93±0.16 4.41±0.40 284±6 # C996-2-4 115–118 214.7±0.5 5549±28 292±4 0.0600±0.0012 5.18±0.11 4.54±0.31 296±4 # C996-2-2A 131–133 189.6±0.7 20,129±74 290±8 0.0935±0.0036 8.19±0.33 5.28±0.79 294±8 # C996-2-1A 150–152 147.5±0.2 26,424±124 336±3 0.1440±0.0039 12.40±0.36 8.40±2.04 344±4 # C996-2-5 156.5–158.5 358.1±0.9 5300±33 327±3 0.1215±0.0012 10.45±0.11 10.07±0.19 336±3 # C996-2-6 172–175 595.5±1.6 10,791±49 255±3 0.1343±0.0012 12.31±0.12 11.84±0.24 263±3 # C996-2-7 177–179.5 1316.2±3.6 671±28 261±3 0.1683±0.0009 15.56±0.09 15.50±0.10 273±3 # MC-44 192–194.5 1268.4±2.5 219±6 247±2 0.1811±0.0008 17.05±0.09 16.99±0.09 259±2 # C996-2-8 213–215.5 855.4±2.3 7592±38 205±3 0.1954±0.0012 19.23±0.14 18.96±0.18 216±3 # # *a d234U=([234U/238U]activity-1)×1000. # *b d234Uinitial was calculated based on 230Th age (T), i.e., d234Uinitial=d234Umeasured×eLambda234×T. # *c BP stands for “Before Present” where the “Present” is defined as the year 1950 AD. # # Hiatuses Indentified: # 8.3 and 5.7 ka BP, and 15.4 and 11.9 ka BP #---------------- # # Variables: # age_calBP Age (calendar years BP) # d18OcarbVPDB delta18O calcium carbonate (per mil VPDB) # # CORE: C996-2 age_calBP d18OcarbVPDB -8 -7.96 38 -8.37 85 -8.51 131 -9.2 178 -10.24 224 -9.41 271 -8.46 287 -9.41 304 -8.81 320 -9.05 334 -8.73 349 -6.88 364 -7.47 378 -8.75 393 -8.67 409 -9.18 424 -9.67 439 -8.75 453 -7.74 468 -8.51 483 -9.36 499 -9.44 515 -9.29 531 -9.83 548 -8.98 564 -8.43 580 -8.76 597 -9.25 613 -8.83 629 -9.63 645 -9.03 662 -7 678 -7.86 733 -9.04 788 -9.54 843 -8.31 898 -8.5 952 -7.88 1007 -8.82 1062 -8.76 1117 -9.58 1172 -9.28 1213 -7.9 1255 -8.34 1296 -8.45 1337 -10.23 1378 -9.95 1419 -10.36 1461 -10.34 1502 -10.15 1543 -8.56 1584 -8.82 1626 -9.55 1667 -9.95 1708 -8.38 1766 -9.03 1823 -10.25 1881 -10 1938 -8.7 1996 -8.74 2053 -10.11 2111 -8.82 2168 -8.57 2226 -9.63 2284 -8.95 2341 -8.94 2399 -8.38 2456 -9.05 2514 -8.58 2571 -7.78 2629 -8.42 2686 -9.42 2744 -7.46 2802 -7.34 2859 -8.65 2917 -9.29 2974 -8.36 3032 -9.68 3089 -9.07 3147 -8.62 3204 -8.73 3262 -9.28 3319 -10.43 3377 -9.33 3439 -9.72 3502 -9.39 3564 -9.37 3626 -9.71 3688 -10.4 3751 -8.97 3813 -8.21 3875 -9.34 3937 -8.88 4000 -9.3 4062 -10 4124 -9.91 4187 -10.17 4249 -9.89 4311 -10.71 4333 -11.08 4354 -10.25 4376 -10.3 4397 -9.6 4413 -10.1 4423 -11.43 4433 -10.58 4443 -10.57 4453 -10.08 4463 -8.67 4474 -8.63 4484 -9.31 4494 -10 4504 -10.47 4514 -8.24 4524 -9.37 4534 -9.72 4544 -10.15 4590 -9.43 4636 -9.51 4682 -10.13 4729 -9.91 4775 -9.94 4821 -10.96 4867 -10.36 4913 -8.69 4959 -8.35 5005 -8.09 5051 -8.86 5098 -9.15 5144 -9.63 5190 -10.58 5236 -9.05 5282 -9.94 5328 -10.75 5374 -10.89 5420 -9.76 5466 -10.54 5513 -9.58 5559 -9.39 5605 -10.01 5651 -9.95 8295 -9.91 8406 -9.8 8517 -9.49 8628 -10.18 8739 -9.78 8850 -10.02 8961 -11.28 9072 -10.34 9183 -11.36 9294 -11.49 9405 -10.95 9516 -10.37 9627 -10.11 9738 -10.15 9849 -9.64 9960 -10.7 10071 -10.33 10182 -9.73 10292 -10.27 10403 -9.37 10514 -9.11 10624 -8.89 10735 -9.31 10845 -9.08 10956 -10.77 11067 -11.09 11177 -11.73 11288 -10.07 11399 -9.9 11509 -9.81 11620 -12.17 11730 -9.83 11841 -9.08 11952 -8.4 15199 -6.58 15298 -6.42 15397 -6.39 15496 -5.4 15595 -5.75 15695 -5.89 15794 -5.7 15894 -4.52 15993 -5.68 16093 -5.79 16192 -5.89 16292 -5.97 16391 -5.51 16491 -6.23 16590 -6.57 16690 -7.39 16789 -7.67 16889 -7.55 16988 -7.58 17082 -8.11 17176 -8.98 17269 -8.67 17363 -9.46 17457 -9.53 17551 -9.54 17645 -9.64 17738 -9.76 17832 -8.94 17926 -9.66 18020 -9.13 18114 -9.97 18208 -9.11 18301 -9.31 18395 -8.74 18489 -9.41 18583 -9.68 18677 -9.71 18770 -9.86 18864 -10.33 18958 -9.67