Assessment of barite of Lasbela,Balochistan, Pakistan,as drilling mud and environmental impact of associated Pb,As, Hg,Cd and Sr     

Bushra Shahab  Erum Bashir  Maria Kaleem  Shahid Naseem  Tahir Rafique 《Environmental Earth Sciences》2016,75(14):1115

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Response to Liu et al.: Rebuttal to “Effect of seasonal weather variations on the desiccation behavior of treated oil sand fine tailings” by Owolagba and Azam (Environ Earth Sci 2015, 74(2): 1711–1717)     

John Owolagba  Shahid Azam 《Environmental Earth Sciences》2016,75(10):891

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Detecting climate adaptation with mobile network data in Bangladesh: anomalies in communication,mobility and consumption patterns during cyclone Mahasen     

Xin Lu  David J. Wrathall  Pål Roe Sundsøy  Md. Nadiruzzaman  Erik Wetter  Asif Iqbal  Taimur Qureshi  Andrew J. Tatem  Geoffrey S. Canright  Kenth Engø-Monsen  Linus Bengtsson 《Climatic change》2016,138(3-4):505-519

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The stratigraphic evolution of the Indus Fan and the history of sedimentation in the Arabian Sea   总被引：6，自引：1，他引：6  

Clift  Peter  Gaedicke  Christoph  Edwards  Rosemary  Il Lee  Jae  Hildebrand  Peter  Amjad  Shahid  White  Robert S.  Schlüter  Hans-Ulrich 《Marine Geophysical Researches》2002,23(3):223-245

The Indus Fan records the erosion of the western Himalayas and Karakoram since India began to collide with Asia during the Eocene, 50 Ma. Multi-channel seismic reflection data from the northern Arabian Sea correlated to industrial well Indus Marine A-1 on the Pakistan Shelf show that sedimentation patterns are variable through time, reflecting preferential sedimentation in deep water during periods of lower sea-level (e.g., middle Miocene, Pleistocene), the diversion of sediment toward the east following uplift of the Murray Ridge, and the autocyclic switching of fan lobes. Individual channel-levee systems are estimated to have been constructed over periods of 10⁵–10⁶ yr during the Late Miocene. Sediment velocities derived from sonobuoys and multi-channel stacking velocities allow sections to be time-depth converted and then backstripped to calculate sediment budgets through time. The middle Miocene is the period of most rapid accumulation, probably reflecting surface uplift in the source regions and strengthening of the monsoon at that time. Increasing sedimentation during the Pleistocene, after a late Miocene-Pliocene minimum, is apparently caused by faster erosion during intense glaciation. The sediment-unloaded geometry of the basement under the Pakistan Shelf shows a steep gradient, similar to the continent-ocean transition seen at other rifted volcanic margins, with basement depths on the oceanward side indistinguishable from oceanic crust. Consequently we suggest that the continent-ocean transition is located close to the present shelf break, rather than >350 km to the south, as previously proposed.  相似文献   

Entropy change and phase transitions in an expanding Universe     

N. Iqbal  T. Masood  N. Demir 《Astronomische Nachrichten》2015,336(10):1025-1032

The work compiles a correlated study of a gravitational quasi equilibrium thermodynamic approach for establishing and signifying a unique behavior of the cosmological entropy and phase transitions in an expanding Universe. On the basis of prescribed boundary conditions for the cluster temperature a relation for the intra‐cluster medium (ICM) of galaxy clusters has been derived. A more productive and signifying approach of the correlation functions used for galaxy clustering phenomena shows a unique behavior of the entropy change where a phenomenon known as the gravitational phase transition occurs. This unique behavior occurs with a symmetry breaking from mild clustering to low clustering and from mild clustering to high clustering which differs from a normal symmetry breaking in material sciences. We also derive results for the specific latent heat associated with the phase transitions of 3.20 T_c and 0.55 T_c for the mildly clustered phase to the low clustered phase and from the mildly clustered phase to the highly clustered phase, respectively. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)  相似文献   

Electron acoustic solitons in magneto-rotating electron-positron-ion plasma with nonthermal electrons and positrons     

K. Jilani  Arshad M. Mirza  J. Iqbal 《Astrophysics and Space Science》2015,355(2):233-242

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Aspects of petrochemical pollution in coastal Louisiana, USA     

Iqbal J  Portier RJ  Gisclair D 《Marine pollution bulletin》2007,54(6):792-797

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Inorganic and organic contaminants in intertidal sediments of the Clyde: Preliminary observations of historical trends?     

Andrew S. Hursthouse  Monika Adamczyk  Leslaw Adamczyk  Frank J. Smith  Parveen Iqbal 《Marine pollution bulletin》1994,28(12):765-767

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Soil studies for highway construction in arid zones     

Iqbal H. Khan 《Engineering Geology》1982,19(1):47-62

An appreciation of the special features of the desert environment is necessary for proper construction and subsequent maintenance of highways in arid zones. Geotechnical tests and chemical analyses were carried out on a large number of samples of dune sand collected from four different sites in the Sahara desert. It is concluded that greater use can be made of local materials and that cement-stabilized sand should prove an adequate base for highways. Some useful suggestions are given for engineers operating in the hot deserts.  相似文献   

Focal mechanism study of north Potwar dformed zone, Pakistan     

Mona Lisa  Shahid A Khan  Azam A Khwaja 《地震学报(英文版)》2004,17(3):255-261

Introduction Northern Pakistan is one of the seismically active regions in the world. Numerous studies have been undertaken to highlight and understand the ongoing collisional process of the Indo-Pakistan plate with the Kohistan island arc. Besides the N-S compression, as a result of the con-vergence, transpressional features have also been recognized. However, in the studied area pres-ence of evaporites (Eocambrian) has led to the development of duplex type models with the basal decollemen…  相似文献