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Paleomagnetic age and palaeobiological significance of hominoid fossil strata of Yuanmou Basin in Yunnan

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Science China Earth Sciences 2004年第5期47卷 405-411页

作者： friedrich A. heller Institute of Geophysics ETH Zurich Switzerland CH-8093

The two sections containing hominoid fossils in the Yuanmou Basin, Yunnan Prov-ince have been studied by means of magnetostratigraphy. The results are as follows. The Xiaohe section records over 8 polarity zones corresponding to Cande-Kent95 time scale, including C3Br.1n, C3Br.1r, C3Br.2n, C3Br.2r, C4n.1n, C4n.1r, C4n.2n and C4n.2r, attaching to Late Mio-cene. This section comprises two layers of hominoid fossils: the lower layer (the 1st layer in fig. 4) which records the lower portion of C4n.2r with paleomagnetic age of 8.20—8.10 Ma and the upper layer (the 16th layer in fig. 4) which records C3Br.1r with paleomagnetic age of 7.20—7.15 Ma. So the age of hominoid fossils in the Xiaohe section is about 8.20—7.15 Ma. The Leilao section records over 11 polarity zones corresponding to Cande-Kent95 time scale, including C3Br, C3Br.1n, C3Br.1r, C3Br.2n, C3Br.2r, C4n.1n, C4n.1r, C4n.2n, C4n.2r, C4n.3n and C4n.3r, attaching to Late Miocene. This section also consists of two layers of hominoid fossils: the lower layer (the 3rd layer in fig. 3) which records C4n.2r with the age of 8.20—8.10 Ma and the upper layer(the 19th layer in fig. 3) which records the middle portion of C3Br with the age of 7.15—7.1 Ma. So the age of hominoid fossils in the Leilao section is about 8.20—7.10 Ma. Sedimentary environments reflected in both sections are extremely similar, and the ages of hominoid fossils are of correspondency. The age of the lower and upper fossil layers is 8.20—8.10 Ma and 7.20—7.10 Ma respectively, which probably imply that hominoids living in Xiaohe and Leilao basins have uniform activity areas. There were hominoids activities all along during 8.00—7.00 MaBP in this field.

关键词： Yuanmou Basin, hominoid, paleomagnetism, chronology.

LIU TUNGSHENG'S PALAEOMAGNETIC LOESS rESEArCH IN SWITZErLAND

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第四纪研究 2009年第5期29卷 847-850页

作者： friedrich heller Institut für Geophysik ETH-Zentrum CH-8092 Zürich

11月22日是刘东生先生的生日,在先生离开我们的一年多时间里,我们时刻在怀念他。这里我们刊登了刘先生的密友之一、瑞士的heller教授的短文,怀念与刘先生一起研究黄土磁学的点点滴滴。本文是heller教授为刘先生的纪念文集撰写的,但因故... 详细信息

11月22日是刘东生先生的生日,在先生离开我们的一年多时间里,我们时刻在怀念他。这里我们刊登了刘先生的密友之一、瑞士的heller教授的短文,怀念与刘先生一起研究黄土磁学的点点滴滴。本文是heller教授为刘先生的纪念文集撰写的,但因故未及在文集中刊出。现在本刊补登,除了表示对先生的深切怀念,也表示对heller教授的感谢和歉意。

关键词：黄土磁学研究刘东

Permo-Triassic Magnetostratigraphy in Wulong Area, Sichuan, China

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Science China Chemistry 1994年第2期37卷 203-212页

作者：陈海泓孙枢李继亮 friedrichheller JonDobson friedrich heller and Jon Dobson Laboratory of Lithosphere Tectonic Evolution Institute of Geology Academia Sinica Beijing 100029 PRC) Swiss Federal Institute of Technology CH-8093 Zurich Switzerland Swiss Federal Institute of Technology CH-8093 Zurich Switzerland)

The Permo-Triassic boundary in Wulong area, Sichuan Province, South China lies in a continuous marine carbonate succession with abundant fossil records. Two well-exposed sections were sampled for magnetostratigraphic studies. The experimental results of rock magnetism reveal that the samples from the Triassic limestones contain only magnetites among which 70% are multi-domain. The ChrM direction is carried by remaining 30% of single-domain magnetite. The Permian limestone samples are dominated by single-domain to superparamagnetic magnetites with little ChrM direction due to their fine-grained texture. Nevertheless, the polarity determination is still possible based on the NrM vector changes during thermal demagnetization. A Permo-Triassic polarity profile in Wulong area is established in the paper, and a tentative correlation with other known profiles is pursued. The authors suggest that the Illawarra reversal starts at the upper part of Wujiapingian, while some normal polarity events may exist in the Kiaman Epoch.

关键词： Permo-Triassic rock magnetism polarity profile.

PrELIMINArY PALEOMAGNETIC EVIDENCE FOr EArLY TrIASSIC SEPArATION OF THE HUANAN AND YANGTZE BLOCKS, SOUTH CHINA

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Chinese Science Bulletin 1992年第15期37卷 1297-1301页

作者：陈海泓孙枢李继亮 KENNETH J. HSU friedrich heller JON DOBSON Laboratory of Lithosphere Tectonic Evolution Institute of Geology Academia Sinica Beijing 100029 PRC Swiss Federal Institute of Technology CH-8092 Zurich

South China comprises three distinct lithospheric blocks, namely the Yangtze, Huanan and Dongnanya (Southeast Asia) blocks according to the hypothesis of 'Mesozoic collisional orogenies of South China' . The Yangtze a... 详细信息

关键词： paleomagnetism early Triassic Huanan Block Yangtze Block.

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四川凉桥晚二叠世磁性地层学剖面

科学通报 1994年第1期39卷 69-72页

作者：陈海泓 friedrich heller 中国科学院地质研究所岩石圈构造演化开放研究实验室北京100029 瑞士苏黎世理工大学地球物理研究所

极性年表的问世使地层对比,尤其是洲际地层对比的精度大大地改善.然而,目前获得普遍接受的极性年表仅限于新生代与晚中生代.中侏罗世之前的极性转换历史,则因缺少大洋磁异常带以资对比而无广泛认同的标准.因此,若建立这一时期的极性年表... 详细信息

极性年表的问世使地层对比,尤其是洲际地层对比的精度大大地改善.然而,目前获得普遍接受的极性年表仅限于新生代与晚中生代.中侏罗世之前的极性转换历史,则因缺少大洋磁异常带以资对比而无广泛认同的标准.因此,若建立这一时期的极性年表,大量的洲际对比是必须的.

关键词：磁性地层剖面晚二叠世古地磁学

Towards Understanding Paleosols in Southern Levantine Eolianites:Integration of Micromorphology,Environmental Magnetism and Mineralogy

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Journal of Mountain Science 2009年第2期6卷 113-124页

作者： Alexander Tsatskin Tatyana S.Gendler friedrich heller Igal Dekman Gitti L.Frey Laboratory of Geology Zinman Institute of Archaeology University of HaifaHaifa 31905 Israel United Institute of Physics of the Earth RAS Bolshaya Gruzinskaya 10Moscow 123810 Russia Institut für Geophysik ETH ZürichCH-8092 Zürich Switzerland Department of Materials Engineering Technion Haifa 32000 Israel

The paper addresses the controversial question of the role of clay-sized dust in the formation of paleosols in coastal eolianites, Israel. At the Habonim type section, the pedocomplex dated by archaeology and luminescence to 45-135 ka ago shows at least three paleosols, not separated by non-soil sediments. The oldest reddish paleosol （apparently related to MIS 5） is magnetically enhanced, leached from carbonates, with signs of bioturbation and strongly aged clay coatings. The reddening is due to very fine, -20 nm, poorly crystallized, superparamagnetic （SP） hematite, as determined by Mossbauer studies. In subsoil, lithorelics of eolianite are found. Over time, the soil surface aggraded due to accelerated fine dust accumulation alongside local slope wash. On younger materials formed magnetically depleted vertisols, dominated by smectite-type expandable paramagnetic clays. In thin sections, vertisols exhibit strong stipple-speckled and striated b-fabric due to shrink-swell processes, impregnative calcite nodules and Fe-Mn redistribution. The uppermost hydric vertisol shows the strongest expression of juxtaposed features of recurrent calcite and Fe precipitation. This paleosol developed on colluvial soil materials, as evidenced by mixing of clay coated and uncoated grains of quartz and calcite allochems. M6ssbauer spectra show high amounts of Fe（III） incorporated in the clay structure, low amounts of SP goethite and absence of SP hematite. Whilst magnetic susceptibility drops in vertisols to minimal values, increase. The latter along ferrimagnetie grain sizes with differences in the hierarchy of microfabric features is taken as indication for lithologic discontinuities which may have resulted from continuous, albeit variable and low-intensity, input of eolian clay from both remote Saharan and local sources, roughly dated to the earlier to middle part of the Last Glacial.

关键词： Coastal sand loess deposition microfabrie hierarchy magnetic enhancement paramagnetic phyllosilicates MSssbauer effect

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中国黄土磁化率与第四纪古气候研究

地质科学 1992年第A12期27卷 279-285页

作者：刘秀铭刘东生 friedrich heller 许同春中国科学院地质研究所瑞士联邦苏黎世高等理工大学国家地震局地球物理研究所

本文以实验数据证明,黄土磁化率的高低与其经历的风化或土壤化强度密切相关,风化程度决定了磁铁矿的生成最及其颗粒的细小程度,从而决定了磁化率的高低。因此,与土壤化程度密切相关的中国黄土地层记录了第四纪古气候变化。

关键词：黄土磁导率第四纪古气候

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华南早三叠世的古地磁学与大地构造

地质科学 1994年第1期29卷 1-9页

作者：陈海泓孙枢李继亮许靖华 Maja.Haag Jom Dobson friedrich heller 中国科学院地质研究所瑞士苏黎世理工大学

从华南几个具代表性地点的下三叠统灰岩中，获得了有意义的古地磁学初步结果．这些结果支持华南存在分离板块的设想．根据新近获得的地质与古地磁学证据，推断华南存在４个岩石图板块．它们是扬子（Ｄ＝２３２．４°，Ｉ＝－１１．８°... 详细信息

从华南几个具代表性地点的下三叠统灰岩中，获得了有意义的古地磁学初步结果．这些结果支持华南存在分离板块的设想．根据新近获得的地质与古地磁学证据，推断华南存在４个岩石图板块．它们是扬子（Ｄ＝２３２．４°，Ｉ＝－１１．８°，Ｋ＝２８．２，α９５＝５．５°），湘桂（Ｄ＝１９８．０°，Ｉ＝３２．２°，α９５＝１２．９°），华夏（Ｄ＝８８．０°，Ｉ＝１３．０°，Ｋ＝２０．１，α９５＝９．１°）和海南（上二叠统Ｄ＝３３８．２°，Ｉ＝１５．９°，Ｋ＝１０．２，α９５＝１４．３°）板块．４个板块的古地磁极位分散，纬度差明显，并存在碰撞后的局部与区域性的旋转作用，尤其是顺时针旋转．华南早中生代的大地构造可理解为４个来自古特提斯和冈瓦纳的岩石圈碎块与欧亚大陆聚合作用的产物．

关键词：早三叠世古地磁学大地构造

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云南思茅地区新生代的持续旋转

科学通报 1993年第24期38卷 2269-2272页

作者：陈海泓郝杰 Jon P.Dobson friedrich heller Kennech J.Hsū 中国科学院地质研究所岩石圈构造演化开放研究实验室北京100029 瑞士苏黎世联邦理工大学

新生代早期(约45 Ma),印度板块在经历了长时期的北向漂移后终与欧亚大陆碰撞。其后,以印度洋的扩张作用为驱动力,印度板块持续向欧亚大陆推挤,使造山带地区产生大规模的陆壳缩短,造就了壮观的世界屋脊——青藏高原。70年代中期。

关键词：古地磁新生代顺时针旋转