Time filter

Source Type

Beijing, China

The China University of Geoscience is a key national university directly under the administration of the Education Ministry of the People's Republic of China. It consists of three campuses, one is located in Haidian District in Beijing, and the second one is located in Wuhan, the capital of Central China's Hubei Province, the third one is in Baoding.It is regarded as a top university specialized in geoscience in China and exerts considerable influence within the Chinese mining and oil industry. Its notable alumni include Wen Jiabao, the Premier of China's State Council, who attended the Beijing Campus when it was known as the Beijing Institute of Geology . The motto "Being austere and simple, keeping on practice and acting for truth." is from him. Wikipedia.

Zhai M.,Northwest University, China | Zhai M.,CAS Institute of Geology and Geophysics | Santosh M.,China University of Geosciences | Santosh M.,Kochi University
Gondwana Research | Year: 2013

The North China Craton (NCC) has experienced a complex geological evolution since the early Precambrian, and carries important records of secular changes in tectonics and metallogeny. Here we synthesize the salient geological and tectonic features of the evolution and destruction of the NCC vis-à-vis major metallogenic events, and the formation of potential ore deposits. We identify a close relationship between the major geological events in the NCC and those reported elsewhere on the globe. We trace the records of a regular change in the pattern of metallogeny, mineral deposit character, spatial distribution and genetic mechanisms, which closely match the timing and styles of the major geological and tectonic events in this craton.The NCC went through five major tectonic cycles: (1) Neoarchean crustal growth and stabilization, (2) Paleoproterozoic rifting-subduction-accretion-collision with imprints of the Great Oxidation Event (GOE), (3) Late Paleoproterozoic-Neoproterozoic multi-stage rifting, (4) Paleozoic orogenesis at the margins of the craton, and (5) Mesozoic extensional tectonics associated with lithospheric thinning and decratonization. Coinciding with these major geological events are five major metallogenic systems identified as follows: (1) an Archean BIF system, (2) Paleoproterozoic Cu-Pb-Zn and Mg-B systems, (3) a Mesoproterozoic REE-Fe-Pb-Zn system, (4) a Paleozoic orogenic Cu-Mo system, and (5) Mesozoic intracontinental Au and Ag-Pb-Zn and Mo systems. The ore-deposit types in each of these metallogenic systems show distinct characteristics and tectonic affinities.From Early Precambrian through Late Precambrian to Paleozoic and Mesozoic, the NCC records a transition from primitive- to modern-style plate tectonics. Evidence for imbricated oceanic plate stratigraphy in a subduction-accretion setting, and collisional orogenesis along at least three major zones of ocean closure are documented. Major transitions in tectonic style and surface environmental changes recorded in other parts of the world are also reflected in the geological history and metallogenic events in the NCC. Large-scale gold deposits formed through intraplate tectonics during the Mesozoic provide important insights into mantle dynamics and crust-mantle interaction associated with lithospheric thinning and craton destruction. The NCC provides one of the best examples for documenting secular changes in the geological history and metallogenic epochs of an evolving Earth. © 2013 International Association for Gondwana Research. Source

Nance R.D.,Ohio University | Murphy J.B.,St. Francis Xavier University | Santosh M.,China University of Geosciences | Santosh M.,Kochi University
Gondwana Research | Year: 2014

The recognition that Earth history has been punctuated by supercontinents, the assembly and breakup of which have profoundly influenced the evolution of the geosphere, hydrosphere, atmosphere and biosphere, is arguably the most important development in Earth Science since the advent of plate tectonics. But whereas the widespread recognition of the importance of supercontinents is quite recent, the concept of a supercontinent cycle is not new and advocacy of episodicity in tectonic processes predates plate tectonics. In order to give current deliberations on the supercontinent cycle some historical perspective, we trace the development of ideas concerning long-term episodicity in tectonic processes from early views on episodic orogeny and continental crust formation, such as those embodied in the chelogenic cycle, through the first realization that such episodicity was the manifestation of the cyclic assembly and breakup of supercontinents, to the surge in interest in supercontinent reconstructions. We then chronicle some of the key contributions that led to the cycle's widespread recognition and the rapidly expanding developments of the past ten years. © 2013 International Association for Gondwana Research. Source

Peng C.,China University of Geosciences
Petroleum Exploration and Development | Year: 2011

Based on core thin sections, logging and seismic data, the distribution of favorable lacustrine carbonate reservoirs is predicted in the upper Es4 of the Zhanhua Sag, Bohai Bay Basin. In the upper Es4 of the Zhanhua Sag, four categories of carbonates are developed, i.e. bioclastic limestones (dolomites), intraclastic limestones (dolomites), arenaceous limestones (dolomites) and argillaceous limestones (dolomites). With core calibrated logs, the electrical characteristics interpretation criteria for various carbonates are established, and the lithofacies sequences of the exploratory well are reconstructed. According to overlying pattern of high-frequency cycles, the short-term cycles of bioherm, carbonate bank and semi-deep lake are divided, and high resolution isochronous formation framework is built. On the basis of the facies characteristics of well tie sections and palaeo-landform background, the carbonate depositional model is established, namely, the reef and bank carbonates are deposited from the largest expansion period to the stable period of lake basin, bank carbonates are mainly distributed on the upper side of synsedimentary faults on the gentle slope or deposited in fault-step lowland on the steep slope while the reef carbonates mainly on fault-step highland on the steep slope. Favorable reservoir types include reef bioclastic limestone (dolomite), bank bioclastic limestone (dolomite), intraclastic limestone (dolomite) and arenaceous limestone. It is possible to predict the distribution of favorable reservoirs according to the depositional model, palaeo-landform analysis and seismic amplitude attributes. © 2011 Research Institute of Petroleum Exploration & Development, PetroChina. Source

Xiao W.,Xinjiang Institute of Ecology and Geography | Xiao W.,CAS Institute of Geology and Geophysics | Santosh M.,China University of Geosciences | Santosh M.,Kochi University
Gondwana Research | Year: 2014

The architecture of accretionary orogens is a key to understand continental growth. Here we present an overview of the orogenic components and their amalgamation in the western Central Asian Orogenic Belt (CAOB). The CAOB records the convergence and interactions among various types of orogenic components including the Japan-type, Mariana-type, and Alaska-Aleutian-type arc systems, as well as the active marginal sequences of the Siberia Craton, which incorporated wide accretionary complexes and accreted arcs and terranes. During construction of the CAOB, the Kazakhstan arc chain was characterized by multiple subduction, whereas the northern fringe of the Tarim Craton remained mostly as a passive margin. The multiple convergence and accretions among these various orogenic components generated huge orogenic collages in the late Paleozoic and even in the early Triassic, involving parallel amalgamation, circum-microcontinent amalgamation and oroclinal bending. The preservation of trapped basins played a significant role in orogenesis with some parts of the oceanic plate being subducted and others behaving as rigid units. The orogenesis in the CAOB was long-lived, lasting for more than 800. m.y., involving multiple-subduction and long, continuous accretion, and featuring the complexity of accretionary orogenesis and continent growth. © 2014 International Association for Gondwana Research. Source

Safonova I.,RAS Institute of Geology and Mineralogy | Santosh M.,Kochi University | Santosh M.,China University of Geosciences
Gondwana Research | Year: 2014

The accretionary complexes of Central and East Asia (Russia, Kazakhstan, Kyrgyzstan, Tajikistan, Mongolia, and China) and the Western Pacific (China, Japan, Russia) preserve valuable records of ocean plate stratigraphy (OPS). From a comprehensive synthesis of the nature of occurrence, geochemical characteristics and geochronological features of the oceanic island basalts (OIB) and ophiolite units in the complexes, we track extensive plume-related magmatism in the Paleo-Asian and Paleo-Pacific Oceans. We address the question of continuous versus episodic intraplate magmatism and its contribution to continental growth. An evaluation of the processes of subduction erosion and accretion illustrates continental growth at the active margins of the Siberian, Kazakhstan, Tarim and North China blocks, the collision of which led to the construction of the Central Asian Orogenic Belt (CAOB). Most of the OIB-bearing OPS units of the CAOB and the Western Pacific formed in relation to two superplumes: the Asian (Late Neoproterozoic) and the Pacific (Cretaceous), with a continuing hot mantle upwelling in the Pacific region that contributes to the formation of modern OIBs. Our study provides further insights into the processes of continental construction because the accreted seamounts play an important role in the growth of convergent margins and enhance the accumulation of fore-arc sediments. © 2012 International Association for Gondwana Research. Source

Discover hidden collaborations