4.1 crustal modifications in SCB and Chuxiong cratonic basins
Central Sichuan (SC), in between Longquan F. and Huayingshan F., is considered as the oldest and the most stable core of the Yangtze plateau, which has a high homogeneous and degrees of hardenability basement below (XiongXS et al., 2015). Chuxiong basin, with Paleoproterozoic rigid lower basement, is independent of tectonic activity. These two cratonic basins both show a relatively low Vp/Vs ratio in lower crust compared to the global average (Christensen, 1996). Till now, there are still some debates on the process of formation of cratonic basins. The resemble characters in Chuxiong Basin and Central SC Basin indicate that lopsided gravity delamination of eclogitic lower crust plays an important role in both the subsidence and long-term stability of the cartonization process, which resulted in a thicker and relative higher velocity root in the lithosphere.
4.2 Mantle residue in the lower crust and its relationship with aulacogens
The mafic or ultramafic residue in CFB and NE SC is mostly composed with the same material with mantle and has a much larger volume than the felsic crust (Schulze, 1989). Cui et al., 1996 summarized the arrangement and velocity in the lower crust of Yangtze Craton is very alike the Phanerozoic Stretching craton with active rifts. Based on the theory of plate tectonics (K.Burke, 1973), mantle uplift or mantle plume, and the mass exchange between crust and mantle are considered as the main driving force of the process of continental rifting. For a triple junction, as the active rift formed by mantle diapirism, the abandoned arm is aulacogen. Since Neoproterozoic era, Chinese continental has experienced three large-scale movements...
... middle of paper ...
...e crustal thickening of Longmenshan block and West Qinlin faults zone is most attributed to a result of lower crustal thickening and delamination.
3）Mechanism related to earthquakes: More than 75% of topographic relief in LMS F. has already been formed during Cenozoic time (WangEQ et al., 2012), but under the continuous interactions among rigid SCB, LMS block and active Litang Block, the presence of fluid beneath South LMS F. results in the rapid uplift and large strain accumulation, which disturbed the still and triggered earthquakes, or to some extent, as a byproduct, may plant seed for the reacitive of CFB aulacogen. This is unanimous with high topography but very low shortening in LMS F. (Shen et al., 2005). Our interpretation links both intra-continental deformation of XSH F. (Molnar and Tapponnier, 1978) and reactivity of LMS F. together during the Cenozoic.
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- According to Wikipedia, Identity formation, also known as individuation, is the development of the distinct personality of an individual regarded as a persisting entity (known as personal continuity) in a particular stage of life in which individual characteristics are possessed and by which a person is recognized or known. According to Erikson, his theory described developmental stages, as extending from birth through adulthood. Erikson, identity formation, beginning in childhood, gains prominence during adolescence.... [tags: Identity formation, Developmental psychology]
1019 words (2.9 pages)
- Brainstorming Brainstorming method is mainly to guide students around a specific topic, to encourage students to actively think, creative thinking, and to talk about and discuss the form of mining a variety of useful information and ideas. Contingency Contingency is the basic category of reflection on the formation and transformation of social and political structure. Delphi technique Delphi technique refers to researchers for a theme, which inviting a number of experts anonymous written way to express their views, and through multiple exchange of views and gradually get the conclusion of a research method.... [tags: Risk management, Risk, Risk aversion, Uncertainty]
711 words (2 pages)
- The primary structure of a protein consists of an amino acid sequence joined covalently in a peptide bond. Amino acids consist of an α amino group (H2N- ), connected to a chiral (with exception to glycine) α carbon bonded to a hydrogen and the unique R-group (-CHR- ), and a carboxyl group (-COOH). A peptide bond is formed through a condensation reaction between the α amino group and the carboxyl group carbon as follows: - NH – CHR – CO – NH – CHR – CO –. Peptide bonds are planar and always in the ‘trans’ formation to prevent steric clash between the amino and carboxyl terminal hydrogen atoms of separate residues in a polypeptide chain. Amino acids within a peptide possess two resonance... [tags: Amino acid, Protein, Protein structure]
1445 words (4.1 pages)
- Outline and critically assess the most significant crises, conflicts and changes in family formations over the last two decades (since 1990). Make reference to your own experience, in terms of changes in identity and identifications over time. In order to address the question it is important to present the evidence which shows that there have been conflicts, crises, and changes in society since 1990. It is widely understood there are many formations of the family. This involves the forever changing affects on society which bring us back to the family.... [tags: Sociology Family Structure ]
2171 words (6.2 pages)
- This research assignment critically analyzes group dynamics through examining Group Formation and Structure, and Leadership. The purpose of this assignment is to provide students with the opportunity to work in a small in-class group and experience the changes and processes that occur within groups. The assignment aims to provide an insight into behaviour of individuals in groups by reflecting on the individual 's personal experience as a member of the structured in-class group and comparing it to relevant theories and academic research.... [tags: Sociology, Group dynamics, Member of Parliament]
1787 words (5.1 pages)
- 1. Introduction This report develops the issue of ineffective organisational structure, in the context of productivity and innovation, as outlined in the brief. The management function of organising, defined as “the process of arranging people and other resources to work together to accomplish a goal” (Schermerhorn, 2014, p.237) is used to frame the limitations of the current functional structure, and offers matrix and amoeba managed structures as alternatives. Recommendations involve discussing the deficiencies of the current functional structure and the development of a new one with employees, and drafting a new matrix structure with the aim to increase effectiveness across all facets of t... [tags: Organizational structure, Structure, Organization]
1452 words (4.1 pages)
- An organizations structure is identifiably made up of an array of different individuals who have aspired to be valuable when giving out their opinions, ideas and talents that bring out the best in any organization when it comes to making structural changes. These structural differences have been known to be somewhat beneficial when incorporated with the aspirational aspects of change in the organizations culture which can show it to be indubitable and indissoluble. When one thinks about the culture or structure of an organization it can have a strong influence on the function and potential success or failure of any facility.... [tags: Organization, Structure, Organizational structure]
1209 words (3.5 pages)
- Organizational structure plays a critical role in the presentation of company image, the hierarchical perspective and the overall explanation of an entity’s objectives and ambiance. The current organizational structure for IKEA stands out to be one of the most appealing and accommodative chart in the functional dissemination and divergence of roles and responsibilities. However, to better support the IKEA Company’s international strategy in the competitive business market, it is prudent that the company adopts an organizational structure that puts the company’s image and scope beyond the standards set and ahead of the potential competitors in the business.... [tags: Organizational structure, Structure, Hierarchy]
763 words (2.2 pages)
- Structure and Policy of the European Union The Common Agricultural Policy (CAP), is the most complex example of common policy in the European Union. Introduced from 1958 to 1968 and still in existence today, it has brought controversy, dispute and political tension within the EU and with the rest of the world. It is also a remarkable example of the movement toward the unknown realm of integration in Europe. However, subsequent reforms have been slow in arrival and have not always achieved the success expected of them.... [tags: European Union Structure Papers]
2712 words (7.7 pages)
- The modern understanding of coral reefs begins in Charles Darwin’s book, On the Structure and Distribution of Coral Reefs. In this classic book written in 1842, he distinguished three main types of reef: the fringing reef, the barrier reef, and the atoll. The fringing reef occurs near the shoreline and basically follows the profile of the shore. Its stony corals need a firm base on which to establish themselves, and they must compete with many other sedimentary organisms looking for a firm substrate on which to settle.... [tags: Coral Reefs Structure]
613 words (1.8 pages)