CHRONOSTRATIGRAPHIC CLASSIFICATION OF ZOIGE BASIN SINCE LATE PLEISTOCENE AND ITS TECTONIC-CLIMATE SIGNIFICANCE

doi:10.3969/j.issn.0253-4967.2016.04.012

Abstract

Abstract:

Since stratigraphic formation is influenced by tectonic activities and climate since late Pleistocene,it is important to build the stratigraphic sequence to improve the research of active tectonics,climatic change and landform factors.Zoige Basin is located in the eastern edge of Tibet Plateau where the tectonic is active and the Chinese monsoon is strong.The research of stratigraphic sequence is closely related to the tectonic activities and climate changes.Based on 26 typical stratum profiles revealed by lacustrine boreholes,terraces,peat deposits and trenching,203 isotope dating data were obtained by AMS and OSL methods.We conduct a stratigraphic correlation and classification in Zoige Basin since the Late Pleistocene.Sedimentary cycles are divided into six sedimentary rhythms (75~42ka,42~37ka,37~20ka,16~11ka,11~4ka and 4~0ka) and six marker beds (fine sand of 75~55ka and 22~20ka,gray silt deposit or gravel deposit of 13~9ka,black sandy clay containing carbonaceous deposits of 4ka,2ka and 0.3ka).There is a close relation between strata and tectonic-climate.On the one hand,sedimentary cycles coincide with climate change and have a good correspondence with ocean oxygen isotope.On the other hand,sedimentation characteristics is influenced by the persistent activities in neotectonic period of the east Kunlun fault zone on the north side and the Longrize fault zone on the west side.Marker beds and sedimentary cycles are compared with the strata in adjacent areas.It shows that climate change is the main factor affecting sedimentary cycle.The difference of stratum thickness and its spatial distribution is also affected by tectonic activity.

Key words: Zoige, late Pleistocene, strata, marker bed

摘要：

晚更新世以来地层的形成受气候、构造活动的影响，并记录其过程。因此，建立晚更新世以来的地层序列，对于气候变化、活动构造、地貌成因等研究十分重要。若尔盖盆地位于青藏高原的东部边缘，中国季风区和青藏高原区的交会地带，对气候变化敏感，构造活动也很强烈，建立盆地晚更新世以来的地层序列可以促进气候变化、构造活动研究。根据若尔盖盆地的湖相钻孔、泥炭矿、河流阶地和探槽等揭露的26个典型地层剖面，结合¹⁴C和OSL等测年方法获得的200多个同位素年龄，对晚更新世以来的地层进行对比和划分，得到地层综合柱状。晚更新世中期以来划分6个沉积韵律（75~55ka BP，55~33ka BP，33~20ka BP，20~11ka BP，11~4ka BP，4~0ka BP）和6个标志层（75~55ka BP和22~20ka BP的粉细砂层，13~9ka BP的青灰色粉细砂或灰-青灰色砾石沉积，5~4ka BP、3.5~2ka BP、0.5~0.3ka BP的黑色含炭质砂质黏土沉积）。沉积序列和构造-气候关系紧密，一方面沉积韵律与气候旋回基本吻合，与深海氧同位素阶段有较好的对应关系；另一方面，沉积层岩性特征也受到北侧的东昆仑断裂带和西侧的龙日坝断裂带新构造期持续活动的影响，沉积过程主要受气候控制，地层厚度及其空间分布的差异也受到构造活动影响。

关键词: 若尔盖, 晚更新世, 地层, 标志层

CLC Number:

P534

LI Jian-jun, ZHANG Jun-long, GUO Yu-tao. CHRONOSTRATIGRAPHIC CLASSIFICATION OF ZOIGE BASIN SINCE LATE PLEISTOCENE AND ITS TECTONIC-CLIMATE SIGNIFICANCE[J]. SEISMOLOGY AND GEOLOGY, 2016, 38(4): 950-963.

李建军, 张军龙, 郭玉涛. 晚更新世以来若尔盖盆地的地层划分及构造-气候意义[J]. 地震地质, 2016, 38(4): 950-963.

References

陈发虎, 王苏民, 李吉均, 等. 1995. 青藏高原若尔盖湖芯磁性地层研究［J］. 中国科学(B辑), 25(7):772-777.
CHEN Fa-hu, WANG Su-min, LI Ji-jun, et al. 1995. Palaeomagnetic record from RH lacustrine core in Zoige Basin of Tibetan plateau［J］. Science in China(Ser B), 25(7):772-777(in Chinese).
段克勤, 姚檀栋, 王宁练, 等. 2012. 青藏高原中部全新世气候不稳定性的高分辨率冰芯记录［J］. 中国科学(D辑), 42(9):1441-1449.
DUAN Ke-qin, YAO Tan-dong, WANG Ning-lian, et al. 2012. The unstable Holocene climatic change recorded in an ice core from the central Tibetan plateau［J］. Science in China(Ser D), 42(9):1441-1449(in Chinese).
郭勇岭. 1963. 川西北地区灌县至若尔盖间构造分区之初步意见［J］. 地质论评, 21(1):6-11.
GUO Yong-ling. 1963. Preliminary opinions of tectonic division in northwest Sichuan between Guan County and Zoige［J］. Geological Review, 21(1):6-11(in Chinese).
何文贵, 熊振, 袁道阳, 等. 2006. 东昆仑断裂带东段玛曲断裂古地震初步研究［J］. 中国地震, 22(2):126-134.
HE Wen-gui, XIONG Zhen, YUAN Dao-yang, et al. 2006. Palaeo-earthquake study on the Maqu Fault of east Kunlun active fault［J］. Earthquake Research in China, 22(2):126-134(in Chinese).
李陈侠, 徐锡伟, 闻学泽, 等. 2011. 东昆仑断裂带中东部地震破裂分段性与走滑运动分解作用［J］. 中国科学(D辑), 41(9):1295-1310.
LI Chen-xia, XU Xi-wei, WEN Xue-ze, et al. 2011. Rupture segmentation and slip partitioning of the mid-eastern part of the Kunlun Fault, north Tibetan plateau［J］. Science in China(Ser D), 41(9):1295-1310(in Chinese).
任俊杰. 2013. 龙日坝断裂带晚第四纪活动及与其周边断裂的运动学关系. 北京:中国地震局地质研究所.
REN Jun-jie. 2013. Late Quaternary activity of the Longriba fault zone and its kinematic relations with adjacent faults. Beijing:Institute of Geology, China Earthquake Administration(in Chinese).
沈才明, 唐领余, 王苏民. 1996. 若尔盖地区25万年以来的植被与气候［J］. 微体古生物学报, 13(4):373-385.
SHEN Cai-ming, TANG Ling-yu, WANG Su-min. 1996. Vegetation and climate during the last 250 000 years in Zoige region［J］. Acta Micropalaeontologica Sinica, 13(4):373-385(in Chinese).
盛海洋. 2008. 青藏高原东北缘若尔盖盆地晚新近纪沉积的岩石地层学［J］. 地质科学, 43(3):445-472.
SHENG Hai-yang. 2008. Lithostratigaphy of late Neogene deposits in the Zoige Basin, northeastern margin of the Qinghai-Tibet plateau［J］. Chinese Journal of Geology, 43(3):445-472(in Chinese).
施雅风, 贾玉连, 于革, 等. 2002. 40~30ka BP青藏高原及邻区高温大降水事件的特征、影响及原因探讨［J］. 湖泊科学, 14(1):1-11.
SHI Ya-feng, JIA Yu-lian, YU Ge, et al. 2002. Features, impacts and causes of the high temperature and large precipitation event in the Tibetan plateau and its adjacent area during 40~30ka BP［J］. Journal of Lake Sciences, 14(1):1-11(in Chinese).
施雅风, 孔昭宸, 王苏民, 等. 1992. 中国全新世大暖期的气候波动与重要事件［J］. 中国科学(B辑), 22(12):1300-1308.
SHI Ya-feng, KONG Zhao-chen, WANG Su-min, et al. 1992. The climatic fluctuation and important events of Holocene megathermal in China［J］. Science in China(Ser B), 22(12):1300-1308(in Chinese).
孙广友, 罗新正, R E Turner. 2001. 青藏东北部若尔盖高原全新世泥炭沉积年代学研究［J］. 沉积学报, 19(2):177-181.
SUN Guang-you, LUO Xin-zheng, Turner R E. 2001. A study on peat deposition chronology of Holocene of Zoige Plateau in the northeast Qinghai Tibetan plateau［J］. Acta Sedimentologica Sinica, 19(2):177-181(in Chinese).
唐领余, 沈才明, 孔昭宸, 等. 1998. 青藏高原东部末次冰期最盛期气候的花粉证据［J］. 冰川冻土, 20(2):133-140.
TANG Ling-yu, SHEN Cai-ming, KONG Zhao-chen, et al. 1998. Pollen evidence of climate during the last glacial maximum in eastern Tibetan plateau［J］. Journal of Glaciology and Geocryology, 20(2):133-140(in Chinese).
王富葆, 韩辉友, 阎革, 等. 1996. 青藏高原东北部30ka以来的古植被与古气候演变序列［J］. 中国科学(D辑), 26(2):111-117.
WANG Fu-bao, HAN Hui-you, YAN Ge, et al. 1996. Paleovegetational and paleoclimatic evolution series on northeastern Qinghai-Xizang Plateau in the last 30ka［J］. Science in China(Ser D), 26(2):111-117(in Chinese).
王富葆, 阎革, 林本海. 1993. 若尔盖高原泥炭δ¹³ C的初步研究［J］. 科学通报, 38(1):65-67.
WANG Fu-bao, YAN Ge, LIN Ben-hai. 1993. Organic carbon stable isotopic composition from peat in Ruoergai Plateau, eastern part of Qinghai-Xizang Plateau［J］. Chinese Science Bulletin, 38(1):65-67(in Chinese).
王苏民, 薛滨. 1996. 中更新世以来若尔盖盆地环境演化与黄土高原比较研究［J］. 中国科学(D辑), 26(4):323-328.
WANG Su-min, XUE Bin. 1996. Environmental evolution of Zoiga Basin since 900ka BP and comparison study with Loess Plateau［J］. Science in China(Ser D), 26(4):323-328(in Chinese).
王燕, 赵志中, 乔彦松, 等. 2006. 川北若尔盖高原红原泥炭剖面孢粉记录的晚冰期以来古气候古环境的演变［J］. 地质通报, 25(7):827-832.
WANG Yan, ZHAO Zhi-zhong, QIAO Yan-song, et al. 2006. Paleoclimatic and paleoenvironmental evolution since the late glacial epoch as recorded by sporopollen from the Hongyuan peat section on the Zoige Plateau, northern Sichuan, China［J］. Geological Bulletin of China, 25(7):827-832(in Chinese).
王云飞, 王苏民, 薛滨, 等. 1995. 黄河袭夺若尔盖古湖时代的沉积学依据［J］. 科学通报, 40(8):723-725.
WANG Yun-fei, WANG Su-min, XUE Bin, et al. 1995. Sedimentological evidence of the piracy of fossil Zoige Lake by the Yellow River［J］. Chinese Science Bulletin, 40(8):723-725(in Chinese).
吴敬禄, 王苏民, 潘红玺, 等. 1997. 青藏高原东部RM孔140ka以来湖泊碳酸盐同位素记录的古气候特征［J］. 中国科学(D辑), 27(3):255-259.
WU Jing-lu, WANG Su-min, PAN Hong-xi, et al. 1997. Climatic variations in the past 140ka recorded in core RM, east Qinghai-Xizang Plateau［J］. Science in China(Ser D), 27(3):255-259(in Chinese).
徐茂其. 1988. 川西北若尔盖高原第四纪环境演变概要［J］. 西南师范大学学报(自然科学版), 13(4):94-100.
XU Mao-qi. 1988. An outline of the Quaternary environment of the Ruoergai Plateau in northwestern Sichuan［J］. Journal of Southwest China Normal University(Natural Science Edition), 13(4):94-100(in Chinese).
薛滨, 王苏民, 夏威岚, 等. 1997. 若尔盖RM孔揭示的青藏高原900ka BP以来的隆升与环境变化［J］. 中国科学(D辑), 27(6):543-547.
XUE Bin, WANG Su-min, XIA Wei-lan, et al. 1997. The uplifting and environmental change of Qinghai-Xizang(Tibetan)Plateau in the past 0.9Ma inferred from core RM of Zoige Basin［J］. Science in China(Ser D), 27(6):543-547(in Chinese).
徐锡伟, 闻学泽, 陈桂华, 等. 2008. 巴颜喀拉地块东部龙日坝断裂带的发现及其大地构造意义［J］. 中国科学(D辑), 38(5):529-542.
XU Xi-wei, WEN Xue-ze, CHEN Gui-hua, et al. 2008. Discovery of Longriba fault zone in eastern part of the Bayan Har block and its geotectonic significance［J］. Science in China(Ser D), 38(5):529-542(in Chinese).
姚檀栋, 施雅风, 秦大河, 等. 1997. 古里雅冰芯中末次间冰期以来气候变化记录研究［J］. 中国科学(D辑), 27(5):447-452.
YAO Tan-dong, SHI Ya-feng, QIN Da-he, et al. 1997. Climate variation since the last interglaciation recorded in the Guliya ice core［J］. Science in China(Ser D), 27(5):447-452(in Chinese).
于学峰, 周卫健, Franzen L G, 等. 2006. 青藏高原东部全新世冬夏季风变化的高分辨率泥炭记录［J］. 中国科学(D辑), 36(2):182-187.
YU Xue-feng, ZHOU Wei-jian, Franzen L G, et al. 2006. High-resolution peat records for Holocene monsoon history in the eastern Tibetan plateau［J］. Science in China(Ser D), 36(2):182-187(in Chinese).
张军龙, 任金卫, 付俊东, 等. 2012. 东昆仑断裂带东部塔藏断裂地震地表破裂特征及其构造意义［J］. 地震, 32(1):1-16.
ZHANG Jun-long, REN Jin-wei, FU Jun-dong, et al. 2012. Earthquake rupture features and tectonic significance of the Tazang Fault in the eastern part of the east Kunlun fault zone［J］. Earthquake, 32(1):1-16(in Chinese).
周卫建, 卢雪峰, 武振坤, 等. 2001. 若尔盖高原全新世气候变化的泥炭记录与加速器放射性碳测年［J］. 科学通报, 46(12):1040-1044.
ZHOU Wei-jian, LU Xue-feng, WU Zhen-kun, et al. 2001. Holocene peat record of climate change in the Zoige plateau by accelerator radiocarbon dating［J］. Chinese Science Bulletin, 46(12):1040-1044(in Chinese).
宗冠福. 1984. 横断山地区发现了丰富的哺乳类化石［J］. 古脊椎动物学报, 22(2):157-158.
ZONG Guan-fu. 1984. Abundant mammalian fossils have been found in the Hengduan Mountains region［J］. Vertebrata Palasiatica,22(2):157-158(in Chinese).
Kirby E, Harkins N, Wang E Q, et al. 2007. Slip rate gradients along the eastern Kunlun Fault［J］. Tectonics, 26:TC2010.
Lin Aiming, Guo Jianming. 2008. Non-uniform slip rate and millennial recurrence interval of large earthquakes along the eastern segment of the Kunlun Fault, northern Tibet［J］. Bull Seismol Soc Amer, 98:2866-2878.
Zhang Junlong, Ren Jinwei, Chen Changyun, et al. 2014. The Late Pleistocene activity of the eastern part of east Kunlun fault zone and its tectonic significance［J］. Sci China Earth Sci, 57:439-453.

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