Method and device for determining lithology of clastic garnet mineral parent rock

A technology of garnet and minerals, applied in the direction of design optimization/simulation, etc., can solve problems such as inapplicability

Active Publication Date: 2021-02-23
PETROCHINA CO LTD
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Problems solved by technology

However, these traditional analysis methods reflect the mixed effect of source supply, a

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  • Method and device for determining lithology of clastic garnet mineral parent rock
  • Method and device for determining lithology of clastic garnet mineral parent rock
  • Method and device for determining lithology of clastic garnet mineral parent rock

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[0084] In order to have a clearer understanding of the technical features, purposes and beneficial effects of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the following specific examples, but it should not be construed as limiting the scope of the present invention.

[0085] An embodiment of the present invention provides a method for determining the lithology of the parent rock of the detrital garnet mineral, wherein the method includes the following steps:

[0086] (1) Analyze the major elements of the detrital garnet mineral No. S81-01 taken from the Qaidam Basin, and then use the garnet Mg- Fe+Mn-Ca major element discriminant diagram (such as Figure 6 as shown, Figure 6 Among them, Prp, Alm, Sps, and Grs are pyrope, almandine, spessartine, and grossandite respectively) to preliminarily determine the lithology of the parent rock of detrital garnet minerals;

[0087] From Figure 6 It can be...

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Abstract

The invention provides a method and device for determining lithology of clastic garnet mineral mother rock. The method comprises steps of preliminarily determining the lithology of the clastic garnetmineral mother rock through employing a garnet Mg-Fe+Mn-Ca main element discrimination graph according to a main element analysis result of a to-be-detected clastic garnet mineral; and when the main element analysis result of the to-be-detected chip garnet mineral falls in the Type A, Type B or Type D region of the discrimination graph, further determining the parent rock lithology of the to-be-detected chip garnet mineral by utilizing the trace element analysis result of the to-be-detected chip garnet mineral. According to the method, garnets from a basic rock source and a variable basic rocksource can be more systematically and accurately distinguished, garnets from different types of skarn sources can be distinguished, and garnets from a granite source, a high-grade granite phase-change argillaceous rock source and a medium-low-grade hornstone phase-change argillaceous rock source can be distinguished; and therefore, the method plays an important role in the aspects of material source recovery research, even basin-mountain coupling relationship research and the like.

Description

technical field [0001] The invention relates to a method and a device for determining the lithology of detrital garnet mineral parent rock, and belongs to the technical field of single mineral geochemical feature analysis in sediment source analysis research. Background technique [0002] Sediment source analysis is of great research significance in determining the properties of sediment parent rocks, transport routes of clastic sediments, sedimentation, and basin-mountain relationships (Wang Chengshan, Li Xianghui, Hu Xiumian. Re-discussion on the impact of the India-Asia continental collision Start time[J]. Acta Geological Sinica, 2003,77(1):16-24; Basu A.A perspective on quantitative provenance analysis[J].Quantitative Provenance Studies in Italy,2003,61:11-22; Weltje G J, Eynatten H V . Quantitative provenance analysis of sediments: review and outlook [J]. Sedimentary Geology, 2004, 171(1): 1-11). The composition of sediments is firstly controlled by the rock type of th...

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Application Information

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IPC IPC(8): G06F30/20
Inventor 付玲洪东铭谷志东简星姜华翟秀芬
Owner PETROCHINA CO LTD
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