A newly discovered Gigantopithecus fauna from Sanhe Cave, Chongzuo, Guangxi, South China

Among the most important faunas in the Late Cenozoic, the Gigantopithecus faunas have received a good deal of attention. The Gigantopithecus fauna recently discovered in Sanhe Cave consists of more than 80 mammal species, including cf. Hominidae, Pongo sp., Hylobates sp., Sinomastodon yangziensis, Stegodon preorientalis, Cervavitus fenqii, Dicoryphochoerus ultimus and Sus xiaozhu. It is the southernmost Gigantopithecus fauna found so far in China. Its geological age is estimated to be Early Pleistocene based on the fauna and stratigraphic correlation. The significant increase in the estimated body sizes of Ailuropoda, Gigantopithecus and Tapirus shows that the Sanhe fauna is middle Early Pleistocene, later than those from Wushan and Liucheng (early Early Pleistocene). Paleomagnetic dating of the fossil-bearing strata in Sanhe Cave gives an age of approximately 1.2 Ma. The fauna is characterized by tropical-subtropical forest types, including Pongo sp., Tupaia sp., Ia sp., Typhlomys intermedius, etc., and it lacks Palaearctic types. It is a typical tropical forest fauna, suggesting an environment with a lush forest and a warm and humid climate. The discovery of the Sanhe Gigantopithecus fauna is significant for establishing the chronological stages of the Gigantopithecus faunas in China, and for discussing their origin, evolution and dynamics. Supported by Key Knowledge Innovation Project of the Chinese Academy of Sciences (KZCX2-YW-106) and National Basic Research Program of China (Grant No. 2006CB806400)     

Orbital- and millennial-scale variability of the Asian monsoon during MIS8 from Sanbao Cave at Mount Shennongjia,central China

One stalagmite oxygen isotope record from Sanbao Cave, China, established with 7 230Th ages and 355 oxygen isotope data, pro- vides a continuous history of the East Asian Monsoon (EAM) intensity for the period from 284 to 240 thousand years before present (ka BP) with typical errors of 3―4 ka. This new record extends the previously published stalagmite δ18O record back to the marine oxygen isotope stage (MIS) 8. The MIS8 EAM record broadly follows orbitally-induced insolation variations and is punctuated by...     

芙蓉洞CO2变化特征初探

通过2009年9月～2010年11月对芙蓉洞11个监测点CO_2浓度连续监测,发现芙蓉洞CO_2浓度有一定时空变化特征。空间上,由于洞穴环境封闭,洞内CO_2浓度总体上从洞口到洞尾增长,同时游客人数,洞道形状等因素对其产生一定影响;季节上,CO_2浓度与洞穴外部环境有一定的响应关系,冬季外界温度较低,降水量较少,洞内CO_2浓度也较低。     

独立式窑洞地震作用下损伤指标研究

定量地评估结构在地震作用下的损伤是地震工程领域的研究重点,增量动力分析方法已被广泛用于建筑结构地震易损性评估,而结构损伤指标是定量评估结构损伤情况的重要参数,山西北部农村地区的独立式土坯窑洞是一种拱受力结构体系,为研究拱结构在地震作用下的破坏特征并确立结构损伤指标,结合实际震害与数值模拟试验,分析了窑洞结构在地震作用下的破坏特征,对比了窑洞结构的顶点水平位移和拱顶竖向位移在不同地震动峰值加速度下与结构损伤情况对应关系,发现窑洞拱顶竖向位移与窑洞拱矢高作为窑洞损伤指标较为合理。     

Huanglong Cave, a new late Pleistocene hominid site in Hubei Province, China

For the past two decades, the modern human origins debate has received significant interest from both the scientific community and the public. The two hypothe- ses “Out of Africa” and “Mutiregional evolution” are focuses of this debate[1-3]. In partic…     

桥梁桩基特大溶洞处理方法的研究与应用

介绍了湖南省郴宁高速公路水龙互通主线桥右幅32#墩1#桩基溶洞成功处理的工程实例.该桩地质复杂,溶洞发育、埋深大、溶洞成串状分布、最大高度21m,通过分级注浆和分级下钢护筒的方法,成功对其进行处理,成桩后,现场声测结果表明,该桩为I类桩.     

丰都张口洞“兴义人”古文化遗址公园建设可行性研究

享有“丰产之地、古居之都”的丰都是兴义市百万人口城市建设拓展的重要区域.张口洞古文化遗址是“兴义人”古文化遗址的核心地带,在此建设“兴义人”古文化遗址公园,条件具备、区位优越、切实可行.     

济南龙洞景区河流袭夺探析

在大量野外实地考察的基础上，研究了济南龙洞景区的河流袭夺现象．阐明了河流袭夺的形态特征，并根据地貌面与沉积证据判定了河流袭夺发生的时代，从而揭示了龙洞景区深谷与陡崖的形成过程．研究表明：龙洞景区河流袭夺发生于第四纪初期，是研究区造景地貌形成的主要外营力．其成因不仅与河流侵蚀能力的差异有关，还与流域地貌演进阶段、区域岩性及构造特征、气候及海平面变化等因素密切关联．     

重庆武隆芙蓉洞洞穴景观美学评价

重庆武隆芙蓉洞景观之美已被世人广为认可，本文尝试对其美学价值进行定量评价，根据该洞穴景观的分布特点和景观评价可操作性的要求，本文把整个景观分为7个小景区，并从美学评价的要求出发，选取了6个评价指标和19个次一级的评价因子，采用了层次分析法和加权法(征询法)，进行了定量评价。     

Paleotemperature changes over the past 3000 years in eastern Beijing,China:A reconstraction based on Mg/Sr records in a stalagmite

The Mg/Sr ratio in a stalagmite,whic is directly proportinonal to DMg/Ca,the solid-liquid distribution coefficient of Mg,is proposed as a geochemical thermometer to estimate paleotemperature changes,The paleotemperature change in eastern Beijing over the past 3000 years has been reconstructed by using this thermometer in the stalagmite ZFFS-1 from Jingdong Cave,The records can be divided into two periods:3000-2000 aBP,cool and wet ,the air temperature averaging 9.8℃;and 2000aBP-present, hot and dry,the air temperature being 1℃ higher than the mean value (11.7℃) of the past 3000 years ,During 500-200 aBP,the air temperature was about 1.2℃ lower than that of the present,corresponding to the Little Ice Age Europe Like δ^18O and δ^C ,Mg/Sr (or DMg/Ca) reflects and obviously warming trend of the past 200 years,These results are supported by historic recods.