Simple models involving the gradual outboard accretion of material along curvilinear subduction zones are often inconsistent with field-based evidence. A recent study using 3-D geodynamic modelling has shown that the entrainment of an exotic continental fragment within a simple subduction system can result in a complex phase of growth. Although kinematic models based on structural mapping and h...

SEPTEMBER 2005, GSA TODAY ABSTRACT The paleoelevation of the Sierra Nevada, California, is important to our understanding of the Cenozoic geodynamic evolution of the North America–Pacific plate boundary, and the current debate is fueled by data that argue for conflicting elevation histories. The non-equilibrium or transient landscape of the Sierra Nevada contains information about both past and...

we present new whole major and trace elements data for a suite of adakitic dacite to rhyolite rocks from the sahand region. these rocks formed in the pliocene to pleistocene during the the collision between the arabian and eurasian plates following subduction of neo–tethys ocean. these subvolcanic intrusions were emplaced into late cretaceous and eocene sedimentary، volcano–clastic and volcanic...

The Chersky seismic belt (NE-Russia) forms the modern plate boundary of the Eurasian-North American continental plate. The geodynamic evolution of this continent-continent setting is highly complex and remains a matter of debate, as the extent and influence of the Mid-Arctic Ocean spreading center on the North Asian continent since the Eocene remains unclear. The progression from a tensional st...

Abstract Since the pandemic spread of COVID-19, it has posed a unique public health concern worldwide due to its increased death rate all around world. The disease is caused by SARS-CoV-2, which main cause Middle East Respiratory Syndrome (MERS) and severe acute respiratory syndrome (SARS). Risk assessment vital action toward risk reduction as increases understanding factors associated with all...

INTRODUCTION Estimating the number of key populations at risk of HIV is essential for planning, monitoring, and evaluating prevention, care, and treatment programmes. We conducted this study to estimate the number of female sex workers (FSW) in major cities of Iran. METHODS We used three population size estimation methods (i.e., wisdom of the crowds, multiplier method, and network scale-up) t...

The South Armenian Block (SAB) belongs to the Lesser Caucasus, and it is located where Central Tethyan belt bends from an EW orientation in Turkey NW-oriented Iranian tectonic zones. Magmatism these belts result of convergence, collision post-collision evolution Arabian plate with Eurasian margin. An exhaustive study including whole-rock major, trace element, radiogenic isotope (Sr, Nd, Pb) dat...

in the last decade, many applied common studies were done in economic social systems phenomena by using network analysis. in these studies, trade relations can be considered as a network that each vertex represents a country and the trade relations between countries represent links of this network. first, we try to make the world exporting and importing networks based on the existence data for ...