DOI: 10.1016/j.earscirev.2019.05.004
论文题名: The same and not the same: Ore geology, mineralogy and geochemistry of Rodinia assembly versus other supercontinents
作者: Liu C. ; Runyon S.E. ; Knoll A.H. ; Hazen R.M.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 196 语种: 英语
英文关键词: copper
; geochemistry
; gold
; magma
; magmatism
; massive sulfide
; mineralogy
; ore deposit
; orogenic belt
; porphyry
; Rodinia
英文摘要: It has been long observed that the amalgamation of supercontinents, including Rodinia, is coeval with peaks of U[sbnd]Pb ages of global detrital zircons. However, our new compilation of global geochemical, mineralogical, and ore geologic records shows that the assembly of Rodinia stands out from others, in terms of whole-rock trace element geochemistry, as well as records of mineralogy and ore deposits. During the assembly of Rodinia, Nb, Y, and Zr concentrations were enriched in igneous rocks, with prolific formation of zircon and minerals bearing Th, Nb or Y, and REE-bearing ore deposits. At the same time, many types of ore deposits are relatively poorly represented in Rodinin terranes, including deposits of orogenic gold, porphyry copper, and volcanic hosted massive sulfide deposits, with a corresponding paucity of many minerals (e.g., minerals bearing Au, Sb, Ni) associated with these deposits. We interpret these records as indicating the prevalence of ‘non-arc’ magmatism and a relative lack of subduction-related arc magma preserved in the surviving pieces of the Rodinia supercontinent, distinct from other episodes of supercontinent assembly. We further attribute the prevalence of ‘non-arc’ magmatism to enhanced asthenosphere–lithosphere interactions in the Mesoproterozoic, and speculate that the lack of ‘arc-collisional’ magma may be related to enhanced erosion of Rodinia orogenic belts. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165860
Appears in Collections: 气候变化与战略
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作者单位: Geophysical Laboratory, Carnegie Institution for Science, Washington, DC 20015, United States; Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States
Recommended Citation:
Liu C.,Runyon S.E.,Knoll A.H.,et al. The same and not the same: Ore geology, mineralogy and geochemistry of Rodinia assembly versus other supercontinents[J]. Earth Science Reviews,2019-01-01,196