VIETNAM JOURNAL OF EARTH SCIENCES ©Vietnam Academy of Science and Technology (VAST) Editor-in-Chief Phan Trong Trinh, Institute of Geological Sciences (VAST) Deputy Editor-in-Chief Lai Vinh Cam, Institute of Geography (VAST) Nguyen Hoang, Institute of Geological Sciences (VAST) Nguyen Hong Phuong, Institute of Geophysics (VAST) Advisory Board Isabelle Manighetti, Observatory of Côte d’Azur, France M Santosh, China University of Geosciences, Beijing Mai Trong Nhuan, Vietnam National University, Hanoi Paul Tapponnier, Earth observatory of Singapore Pham Hoang Hai, Institute of Geography (VAST) Tran Trong Hoa, Institute of Geological Sciences (VAST) Editorial Board Anne Briais, National Centre for Scientific Research (CNRS), Toulouse, France Bui Tien Dieu, University College of Southeast Norway Cung Thuong Chi, Institute of Geological Sciences (VAST) Do Minh Duc, Vietnam National University, Hanoi Giuliano F Panza, National Academy of Lincei, Roma, Italy Herve Leloup, Claude Bernard University, France Hoang Van Long, Hanoi University of Mining and Geology Ismail Yusoff, Malaya University, Malaysia Koji Okumura, Hiroshima University, Japan Kumar Arjun, Arni University, Kāngar, India Le Huy Minh, Institute of Geophysics (VAST) Le Thi Thu Hien, Institute of Geography (VAST) Le Thi Thu Huong, Institute of Geosciences, Karl-Franzens University of Graz, Austria Luc Hens, Free University, Brussel, Belgium Martin Flower, University of Illinois at Chicago, USA Montri Choowong, Chulalongkorn University, Bangkok, Thailand Ngo Duc Thanh, University of Science and Technology of Hanoi Ngo Xuan Thanh, Hanoi University of Mining and Geology Nguyen Binh, Nippon Oil & Gas Exploration C., Tokyo, Japan Nguyen Chau, AGH University of Science and Technology, Krakow, Poland Nguyen Dinh Duong, Institute of Geography (VAST) Nguyen Le Minh, Institute of Geophysics (VAST) Nguyen Quoc Cuong, Institute of Geological Sciences (VAST) Nguyen Tai Tue, Vietnam National University, Hanoi Nguyen Trung Minh, Vietnam National Museum of Nature Nguyen Van Hoang, Institute of Geological Sciences (VAST) Nguyen Van Huong, Vietnam National University, Hanoi Nguyen Van Lap, Ho Chi Minh City Institute of Resources Geography (VAST) Nguyen Van Vuong, Vietnam National University, Hanoi Peter Clift, Lousiana State University, Lousiana, USA Peter Königshof, Natural History Museum Frankfurt, Germany Pham Dinh Nguyen, National Foundation for Science and Technology Development Pham Huy Giao, Asian Institute of Technology, Bangkok, Thailand Pham Quy Nhan, Hanoi University of Natural Resources and Environment Phan Van Tan, Vietnam National University, Hanoi Philippe Janvier, Muséum National d’Histoire Naturelle, Paris, France Robert Findlay, VietOz Minerals Pty Ltd, Hobart, Tasmania, Australia Siringan Fernando, University of the Philippines Takeshi Sagiya, Nagoya University, Japan Tran Liem, University of Tennessee a Knoxville, USA Tran Thanh Hai, Hanoi University of Mining and Geology Tran Tuan Anh, Institute of Geological Sciences (VAST) Vankatesh Raghavan, Osaka City University, Osaka, Japan Victor Mocanu, Bucharest University, Romania Vu Thanh Ca, Viet Nam Administration of Sea and Islands Vu Tuong Thuy, University of Nottingham, Malaysia Yoshiki Saito, Geological Survey of Japan Editorial office Secretary: Nguyen Thi Dung Front cover: http://thanhlamhotspring.com VIETNAM JOURNAL OF EARTH SCIENCES Volume 39, Number March 2017 CONTENTS Eruptive-volcanic-basalt structures in the Truong SaSpratly Islands and adjacent areas from interpreting gravity and magnetic data 1-13 Nguyen Dinh Chau, Pieczonka General characteristics of rare earth and radioactive elements in Dong Pao deposit, Lai Chau, Vietnam Jadwiga, Piestrzyński Adam, Duong Van Hao, Le Khanh Phon, Jodłowski Paweł 14-26 Pham Tich Xuan, Nguyen Van Study on active tectonic faults using soil radon gas method in Viet Nam Pho, Vu Van Chinh, Pham Thanh Dang, Nguyen Thi Lien, Doan Thu Tra, Hoang Tuyet Nga, Bui Van Quynh, Nguyen Van Luan, Nguyen Xuan Qua 27-46 Empirical Attenuation relationship for Peak Ground Arjun Kumar, Himanshu Mittal, Rohtash Kumar, Rajeev Horizontal Acceleration for North-East Himalaya Saran Ahluwalia 47-57 Tong Ngoc Thanh, Trieu Duc Methodology of determining effective porosity and Huy, Nguyen Van Kenh, Tong longitudinal dispersivity of aquifer and the application to Thanh Tung, Pham Ba Quyen, field tracer injection test in Southern Hanoi, Vietnam Nguyen Van Hoang 58-75 New discovery of late early ordovician graptolites and Nguyen Huu Hung, Nguyen Trung Minh, Doan Dinh Hung, discussion on stratigraphic sequence of paleozoic sediments in the Dinh Ca - Trang Xa Section, Vo Nhai Nguyen Ba Hung Disctrict, Thai Nguyen Province, Northeast Vietnam 76-86 A Digital Shoreline Analysis System (DSAS) applied on mangrove shoreline changes along the Giao Thuy coastal area (Nam Dinh, Vietnam) during 2005-2014 87-96 Tran Tuan Dung, Nguyen Quang Minh Nguyen An Thinh, Luc Hens Distributed by: Editorial office of Vietnam Journal of Earth Sciences 3rd floor, A16, VAST, 18 Hoang Quoc Viet Str., Cau Giay, Hanoi, Vietnam Website: http://www.vjs.ac.vn AUTHOR GUIDELINES Title: Concise and informative Titles are often used in information-retrieval systems Author names and affiliations Please clearly indicate the given name(s) and family name(s) of each author and check that all names are accurately spelled Provide the full postal address of each affiliation Corresponding author The corresponding author is independent of the first author Provide the email Abstract: A concise and factual abstract is required The abstract should state briefly the purpose of the research, the principal results and major conclusions Keywords: Provide a maximum of keywords Introduction: State the objectives of the work Relevant controversies or disagreements in the field should be mentioned so that a non-expert reader can delve into these issues further Background: Provide an adequate background You should supply sufficient background information to allow the reader to understand and evaluate the results without referring to previous publications on the topic As you compose the introduction, think of readers who are not experts in this field Material and methods: Provide sufficient detail to allow the work to be reproduced Protocols for new methods or significant modifications to existing methods should be included Studies presented should comply with our recommendations for distribution of materials and data Results: This section should provide statistical analyses of all of the experiments that are required to support the conclusions of the paper Present the results as concisely as possible in text, table(s), or figure(s) Avoid extensive use of graphs to present data that might be more concisely presented in the text or tables Limit photographs to those that are absolutely necessary to show the experimental findings Number figures and tables in the order in which they are cited in the text, and be sure to cite all figures and tables Discussions: This should explore the significance of the results of the work The Discussion should provide an interpretation of the results in relation to previously published work It should not contain extensive repetition of the Results or reiteration of the Introduction This section should spell out the major conclusions of the work along with some explanation or speculation on the significance of these conclusions Conclusions: The main conclusions of the study may be presented in a short Conclusions section, which may stand alone or form a subsection of a Discussion or Results and Discussion section Acknowledgments: This section should describe sources of funding that have supported the work References: Please ensure that every reference cited in the text is also present in the reference list (and vice versa) Examples: "as demonstrated (Allan, 1996a, 1996b; Shi and Shen, 1998) Cung et al (2000) have recently shown " References in the alphabetical list should be in the form of the following example: Cung Thuong Chi, Nguyen Quoc Cuong, Nguyen Trong Yem, 2000 Preliminary paleomagnetic results of Late Permian-Early Triassic basalts from northwestern Vietnam and their tectonic implications Journal of Geology, A/259, 1-8 (In Vietnamese) Shi, G.R., Shen, Shu-zhong, 1998 A Changhsingian Late Permian brachiopod fauna from Son La, northwest Vietnam Journal of Asian Earth Sciences 16, 501-511 Appendices: Please add appendices if it is necessary Author can download the example at http://vjs.ac.vn/index.php/jse/about/submissions#onlineSubmissions Index number 12667, printed 250 copies at Printing Hoang Quoc Viet Technology and Science Joint Stock Company, Hanoi Printed and depositary submission 1th Quarter 2017 Price: 30.000 VND .. .VIETNAM JOURNAL OF EARTH SCIENCES Volume 39, Number March 2017 CONTENTS Eruptive-volcanic-basalt structures in the Truong SaSpratly Islands... Thinh, Luc Hens Distributed by: Editorial office of Vietnam Journal of Earth Sciences 3rd floor, A16, VAST, 18 Hoang Quoc Viet Str., Cau Giay, Hanoi, Vietnam Website: http://www.vjs.ac.vn AUTHOR... implications Journal of Geology, A/259, 1-8 (In Vietnamese) Shi, G.R., Shen, Shu-zhong, 1998 A Changhsingian Late Permian brachiopod fauna from Son La, northwest Vietnam Journal of Asian Earth Sciences