CN104237968A - Method for determining source of coastal tidal flat silt by utilizing Nd-Sr isotopic tracing - Google Patents
Method for determining source of coastal tidal flat silt by utilizing Nd-Sr isotopic tracing Download PDFInfo
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Abstract
The invention discloses a method for determining the source of coastal tidal flat silt by utilizing Nd-Sr isotopic tracing. The method includes the following steps: collecting multiple surface sediment samples from a potential source area of silt; collecting multiple surface sediment samples from the coastal tidal flat silt of a target area; removing salt in the samples; removing organic matters in the samples; removing secondary carbonate in the samples; levigating the samples after being dried; taking processed samples for isotopic analysis experiments. The method is more reliable than a conventional granularity feature analysis method and a conventional magnetic feature analysis method and simpler than a geochemical feature analysis method and a remote-sensing analysis method. Nd-Sr isotopes are adopted as tracer sources, so that the method has obvious tracing advantages.
Description
Technical field
The invention belongs to Coastal beach and enclose and cultivate technical field, be particularly related to and help Coastal beach to enclose and cultivate the method determining Coastal beach sediment source.
Background technology
Along with population sustainable growth and social economy's fast development, China's land resource is day by day deficient, and coastal seashore is enclosed and cultivated, expand land-based area is the main path alleviating China's land resource deficiency.Jiangsu Coastal Areas beach area ranks first in the country, and rectifies enclose and exploitation it, can be the reserve land resources that the whole province's economic development provides sufficient.Just due to this, Jiangsu Coastal Areas Tidal Flat Reclamation development project is being arisen at the historic moment.
Obviously, making rational planning for, there not only have with develop shoals to be significantly urgent but also have important economic implications.The Geochemical Characteristics of seashore silt and Material Source thereof be tidal flat of Jiangsu Province make rational planning for develop in the most basic problem in science.
Jiangsu mainland coastline is about 1000km, and the overwhelming majority is coast with silty mud sediment line.Because the condition such as geology, hydrometeorology has larger difference on the way, the Geochemical Characteristics of seashore silt may have obvious difference, and thus its source is also not the same.By finding out the Geochemical Characteristics of tidal flat of Jiangsu Province and dune ridge silt and the Yellow River closed on thereof, the Changjiang river and eupelagic sediment, extract the geochemical indicator of feature, the characteristic index in contrast tidal flat of Jiangsu Province, dune ridge silt and potential source region, determine sediment source area and Fluctuation thereof, calculate the contribution portion in each source, further combined with the hydrology and hydrodynamic force and morphologic characteristics, announcement sediment source mechanism, can be tidal flat of Jiangsu Province to enclose and cultivate planning and provide detailed, basic geochemical data with exploitation, proposing reasonably suggestion for enclosing and cultivating plantation simultaneously.
About the Material Source of Coastal Area of Jiangsu Province seashore silt, also have some to investigate, the method that these researchs adopt has a lot.Such as, Wang and Ke (1997) has carried out labor to the grain size characteristic of jiangsu coast silt, and thinks from offshore and diminish gradually to offshore particle diameter, and there is different sources in south with northern; By analyzing the sedimental Geochemical Characteristics in the Huanghai Sea middle and south, Yang and Youn (2007) thinks that Holocene epoch argillaceous sediment is from Chinese river, particularly arenaceous sediment thing in the Yellow River is then from Korea S river.Wu Chuanqing etc. (2007) have carried out remote sensing analysis to entrance of Changjiang River and marine site, north and south silt, have understood silt distribution characteristics and migration situation; By magnetic characteristic analysis, Zhang et al. (2012) show that there is significant contribution ancient the Yellow River to Yang Kou port Sediments From The North, there is appreciable impact in the Changjiang river on south, wormwood artemisia port; Generally, the measure such as the most applied sedimentology of existing research, geomorphology, mineralogy, element geochemistry, remote sensing and model.
These researchs can only provide qualitatively, compared with the result of large scale.These investigation show that the material of dune ridge mainly comes from ancient great wall, Huanghe delta sediment, and the East Sea advancing wave of side and the South Yellow Sea rotation wave of side are northeast the dynamic condition of dune ridge group early Pleistocene at this Hydrodynamic field of being formed of meeting southeast.But from what come for silt, Yangtze and Yellow rivers contribute to how many, and whether contribution amount continues, and whether ocean silt inputs, and the variation feature in thing source is how actually, etc. the research of problem current also weaker.
Summary of the invention
For prior art Problems existing, the object of the present invention is to provide a kind of method determining Coastal beach sediment source, Coastal beach can be served and enclose and cultivate planning and develop and enclose and cultivate plantation.
For achieving the above object, the invention provides a kind of method utilizing Nd-Sr tagging determination Coastal beach sediment source, comprise following step:
Step one, in the potential source region of silt, gathers multiple surface sediment samples;
Step 2, in the Coastal beach silt of target area, gathers multiple surface sediment samples;
Step 3, inserts sample in beaker, adds deionized water, stirs, water bath sonicator is centrifugal after 10 minutes, topple over supernatant liquor, with desalination;
Step 4, removes the organic matter in sample;
Step 5, removes the Secondary Carbonates in sample further;
Step 6, after the sample drying after process, is ground to below 200 orders;
Step 7, sample thief, carries out isotope analysis experiment;
Step 8, utilizing isotopics to draw a circle to approve the Material Source district of coastal silt, is namely utilize ε
nd(0) and
87sr/
86sr ratio similarity determines the Material Source of coastal silt, the ε in a certain " the potential source region of silt " and " target area "
nd(0) and
87sr/
86sr ratio is more close, then illustrate that " target area " seabeach is coated with the possibility of sediment source in this " the potential source region of silt " larger.
Wherein, the sampling time in step one is identical with the sampling time in step 2; The sample plastic casing splendid attire of step one and step 2 collection also transports laboratory back in time.
Wherein, step 3 repeats twice, with abundant desalination.
Wherein, described step 4 is specially: add a certain amount of 10% concentration H in the sample to which
2o
2, after producing bubble in beaker, beaker is put and is heated to about 180 DEG C on hot plate, to remove organic matter.
Wherein, described step 5 is specially: in the beaker removing the sample after organic matter, add 10% concentration watery hydrochloric acid, then beaker is put is heated to about 180 DEG C on hot plate, to remove Secondary Carbonates.
Wherein, described step 6 is specially: after the sample drying after process, levigate to 200 orders in agate mortar.
Wherein, described step 7 is specially: claim a certain amount of sample, use HNO
3+ HF solution disappears and boils; Second step, is separated Sr and Nd with standard ionomer exchange column, measures with Finnigan type isotope mass spectrometer
87sr/
86sr and
143nd/
144nd, uses
86sr/
88sr=0.1194 and
146nd/
144nd=0.7219 standardization Sr and Nd isotopic ratio.
Wherein, in step one, collected specimens near Yellow River in Shandong Province estuary, aging seed region, Jiangsu, entrance of Changjiang River; In step 2, gather multiple surface sediment samples at strip mud region, Dongsha dune ridge; Detailed comparisons is carried out in the silt Nd-Sr isotopics of target area and strip mud and Dongsha dune ridge group and potential source region and the Yellow River estuary, aging seed and entrance of Changjiang River, distinguishes that it comes source region.
Compared to prior art, the method utilizing Nd-Sr tagging determination Coastal beach sediment source provided by the invention, more reliable than traditional " Analysis of grain size method " and " magnetic characteristic analysis ", simpler than " Analysis of Geochemical Characteristics method " and " remote sensing analysis method ".Tracer source adopts Nd-Sr isotope, has obvious spike advantage, has different because Nd-Sr coordination have all ages and classes, the dissimilar mineral of Rb/Sr and Sm/Nd ratio or rock
143nd/
144nd and
87sr/
86sr ratio;
87rb and
147the Sm half life period is all very long for modern silt, radioactivity decay pair
143nd/
144nd and
87sr/
86the impact of Sr ratio can not need to consider; These isotopic ratios relative to other indexs such as such as granularity, mineral, element in surficial process by weathering, migration, diagenetic affect thus more stable.
Accompanying drawing explanation
Fig. 1 is the process flow diagram utilizing Nd-Sr tagging determination Coastal beach sediment source method of the present invention;
Fig. 2 is the jiangsu coast seashore that obtains of the present invention and offshore silt isotope space distribution schematic diagram;
Fig. 3 is the jiangsu coast silt that the present invention obtains
87sr/
86sr-ε
nd(0) schematic diagram;
Fig. 4 be the jiangsu coast silt isotopics that obtain of the present invention with potential source region compare schematic diagram.
Embodiment
In order to more clearly state the present invention, below in conjunction with accompanying drawing, the invention will be further described.
Refer to Fig. 1, the method utilizing Nd-Sr tagging determination Coastal beach sediment source provided by the invention, comprises following step:
Step one, in the potential source region of silt, gathers multiple surface sediment samples;
Step 2, in the Coastal beach silt of target area, gathers multiple surface sediment samples;
Step 3, inserts sample in beaker, adds deionized water, stirs, water bath sonicator is centrifugal after 10 minutes, topple over supernatant liquor, with desalination;
Step 4, removes the organic matter in sample;
Step 5, removes the Secondary Carbonates in sample further;
Step 6, after the sample drying after process, is ground to below 200 orders;
Step 7, sample thief, carries out isotope analysis experiment;
Step 8, utilizing isotopics to draw a circle to approve the Material Source district of coastal silt, is namely utilize ε
nd(0) and
87sr/
86sr ratio similarity determines the Material Source of coastal silt, the ε in a certain " the potential source region of silt " and " target area "
nd(0) and
87sr/
86sr ratio is more close, then illustrate that " target area " seabeach is coated with the possibility of sediment source in this " the potential source region of silt " larger.
The object of the present embodiment is the Material Source determining Coastal Area of Jiangsu Province seashore silt:
Annual July, near Yellow River in Shandong Province estuary, aging seed region, Jiangsu, entrance of Changjiang River, gather 31 surface sediment samples; The July in the same year in strip mud region, Dongsha dune ridge gathers 31 surface sediment samples.Sample collection point choose Main Basis two principles: one, avoid artificial interference; Two, representative.
Isotope analysis experiment is specially: claim a certain amount of sample, use HNO
3+ HF solution disappears and boils; Second step, is separated Sr and Nd with standard ionomer exchange column, measures with Finnigan type isotope mass spectrometer
87sr/
86sr and
143nd/
144nd, uses
86sr/
88sr=0.1194 and
146nd/
144nd=0.7219 standardization Sr and Nd isotopic ratio.
According to the data that the isotope analysis experiment obtained obtains, analytic process is as follows:
First, determine that whether the seashore silt of the same area is identical with the source of offshore silt:
Seashore silt as shown in Figure 2
87sr/
86sr ratio and ε
nd(0) value changes respectively between 0.7149 ~ 0.7185 and-11.2 ~-12.5, and offshore dune ridge group silt
87sr/
86sr ratio and ε
nd(0) value is respectively between 0.7127 ~ 0.7181 and-10.2 ~-14.3, changes slightly greatly than the isotope of seashore silt.On average seashore silt (0.714984 ,-11.82)
87sr/
86sr odds ratio offshore silt (0.716761 ,-11.93) slightly low and both ε
nd(0) value is close.Generally, from seashore to the direction in offshore and even sea,
87sr/
86sr ratio reduces and ε gradually
nd(0) ratio seems the trend of increase.
As shown in Figure 3, offshore silt isotope region can be divided into three parts (I, II, III).Particularly, the ε of region I
nd(0) value is less than-12.5, the ε of region III
nd(0) value is greater than-11.2, the ε of region II
nd(0) value is between I and III of region.Widely different with the identical of offshore silt isotope region II and with region I and III of the Nd isotope scope of seashore silt.Because Sr isotopics exist certain granularity effect, therefore, the more known seashore silt according to Nd isotopics provided by offshore silt region II, or seashore silt also can be become by the mixing of offshore silt region I with III.But, in fact do not exist in space distribution according to offshore silt region I, II and III that isotopics divide.
Therefore, seashore silt is mixed by offshore silt, and seashore silt is identical with the source of offshore silt.
Then by comparing " jiangsu coast " silt and the isotopic data of each " potential source region " silt, judge the source of jiangsu coast silt then.
As shown in Figure 4, arranged the isotopic data of entrance of Changjiang River, HUANGHE ESTUARY and Korea S river, Huanghai Sea various places silt and basement rock, some of them data have references to the achievement in research first researchist.And compared for jiangsu coast silt and the similarities and differences between them.Contrast finds, jiangsu coast silt and Korea S's Irish touchstone, river sand and Lianyun Harbour Lian Dao sand have visibly different isotopic characteristic, and this illustrates that Jizhou Island, Korea S river and Lianyun Harbour Lian Dao are not jiangsu coast silt significant contributor.
Different from Korea S river, Jizhou Island rock and Lianyun Harbour Lian Dao sand, the isotopics of Chinese river estuary sediment, particularly Nd isotopics and jiangsu coast close, therefore, Chinese river is the significant contributor of jiangsu coast silt.
Compared to prior art, the invention provides a kind of method utilizing Nd-Sr tagging determination Coastal beach sediment source, more reliable than traditional " Analysis of grain size method " and " magnetic characteristic analysis ", simpler than " Analysis of Geochemical Characteristics method " and " remote sensing analysis method ".Tracer source adopts Nd-Sr isotope, has obvious spike advantage, has different because Nd-Sr coordination have all ages and classes, the dissimilar mineral of Rb/Sr and Sm/Nd ratio or rock
143nd/
144nd and
87sr/
86sr ratio;
87rb and
147the Sm half life period is all very long, for modern silt, and radioactivity decay pair
143nd/
144nd and
87sr/
86the impact of Sr ratio can not need to consider; These isotopic ratios relative to other indexs such as such as granularity, mineral, element in surficial process by weathering, migration, diagenetic affect thus more stable.
Specifically, step 4 is specially: add a certain amount of 10% concentration H in the sample to which
2o
2, after producing bubble in beaker, beaker is put and is heated to about 180 DEG C on hot plate, to remove organic matter.
Step 5 is specially: in the beaker removing the sample after organic matter, add 10% concentration watery hydrochloric acid, then beaker is put is heated to about 180 DEG C on hot plate, to remove Secondary Carbonates.
Step 6 is specially: after the sample drying after process, levigate to 200 orders in agate mortar.
Certainly, this is only a specific embodiment of the present invention, removal of the present invention is organic, go the technique of Secondary Carbonates to be not limited in this, also can be other can realize removing technique that is organic and Secondary Carbonates, and the grain size of the container ground and final sample is not limited in this.
In the present embodiment, the sampling time in step one is identical with the sampling time in step 2; The sample plastic casing splendid attire of step one and step 2 collection also transports laboratory back in time.Plastic casing splendid attire is to ensure the pure of sample, prevents sample to be mixed into impurity.Plastic casing also can adopt other to have the container of good sealing property.
In the present embodiment, step 3 repeats twice, is in order to desalination more fully.
These are only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. utilize a method for Nd-Sr tagging determination Coastal beach sediment source, it is characterized in that, comprise following step:
Step one, in the potential source region of silt, gathers multiple surface sediment samples;
Step 2, in the Coastal beach silt of target area, gathers multiple surface sediment samples;
Step 3, inserts sample in beaker, adds deionized water, stirs, water bath sonicator is centrifugal after 10 minutes, topple over supernatant liquor, with desalination;
Step 4, removes the organic matter in sample;
Step 5, removes the Secondary Carbonates in sample further;
Step 6, after the sample drying after process, is ground to below 200 orders;
Step 7, sample thief, carries out isotope analysis experiment;
Step 8, utilizing isotopics to draw a circle to approve the Material Source district of coastal silt, is namely utilize ε
nd(0) and
87sr/
86sr ratio similarity determines the Material Source of coastal silt, the ε in a certain " the potential source region of silt " and " target area "
nd(0) and
87sr/
86sr ratio is more close, then illustrate that " target area " seabeach is coated with the possibility of sediment source in this " the potential source region of silt " larger.
2. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, it is characterized in that, the sampling time in step one is identical with the sampling time in step 2; The sample plastic casing splendid attire of step one and step 2 collection also transports laboratory back in time.
3. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, it is characterized in that, step 3 repeats twice, with abundant desalination.
4. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, it is characterized in that, described step 4 is specially: add a certain amount of 10% concentration H in the sample to which
2o
2, after producing bubble in beaker, beaker is put and is heated to about 180 DEG C on hot plate, to remove organic matter.
5. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, it is characterized in that, described step 5 is specially: add 10% concentration watery hydrochloric acid in the beaker of the sample after removing organic matter, again beaker is put and be heated to about 180 DEG C on hot plate, to remove Secondary Carbonates.
6. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, it is characterized in that, described step 6 is specially: after the sample drying after process, levigate to 200 orders in agate mortar.
7. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, it is characterized in that, described step 7 is specially: claim a certain amount of sample, use HNO
3+ HF solution disappears and boils; Second step, is separated Sr and Nd with standard ionomer exchange column, measures with Finnigan type isotope mass spectrometer
87sr/
86sr and
143nd/
144nd, uses
86sr/
88sr=0.1194 and
146nd/
144nd=0.7219 standardization Sr and Nd isotopic ratio.
8. the method utilizing Nd-Sr tagging determination Coastal beach sediment source according to claim 1, is characterized in that, in step one, and collected specimens near Yellow River in Shandong Province estuary, aging seed region, Jiangsu, entrance of Changjiang River; In step 2, gather multiple surface sediment samples at strip mud region, Dongsha dune ridge; Detailed comparisons is carried out in the silt Nd-Sr isotopics of target area and strip mud and Dongsha dune ridge group and potential source region and the Yellow River estuary, aging seed and entrance of Changjiang River, distinguishes that it comes source region.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777215A (en) * | 2015-04-23 | 2015-07-15 | 中国水利水电科学研究院 | Method for determining watershed scale individual rainfall sediment sources |
| CN109297999A (en) * | 2018-11-22 | 2019-02-01 | 李熙 | A kind of measuring method of inner continental shelf sea area sediment source |
| CN110646496A (en) * | 2018-06-26 | 2020-01-03 | 中国科学技术大学 | Method for identifying hairy crab producing area by strontium isotope |
| CN113433201A (en) * | 2021-06-21 | 2021-09-24 | 浙江理工大学 | Method for sequentially extracting strontium isotopes for silk cultural relics |
| CN114324552A (en) * | 2021-11-30 | 2022-04-12 | 中国地质调查局西安地质调查中心(西北地质科技创新中心) | Method and system for performing Sr isotope analysis on Sr-rich mineral or rock |
| CN115546340A (en) * | 2022-10-20 | 2022-12-30 | 中国科学院广州地球化学研究所 | Exploration method for screening porphyry copper target area by utilizing isotope mapping |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210271A (en) * | 1998-07-14 | 1999-03-10 | 辽河石油勘探局钻采工艺研究院 | Technology for isotopic tracing determination in well |
| RU2184386C1 (en) * | 2001-08-15 | 2002-06-27 | Открытое акционерное общество "Татнефть" Татарское геолого-разведовочное управление ОАО "Татнефть" | Method for exploring underground water contamination areas |
| CN101936832A (en) * | 2009-12-24 | 2011-01-05 | 刘立安 | New method for particle size analysis of ferruginous cemented mud rock |
-
2014
- 2014-10-09 CN CN201410529593.0A patent/CN104237968A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1210271A (en) * | 1998-07-14 | 1999-03-10 | 辽河石油勘探局钻采工艺研究院 | Technology for isotopic tracing determination in well |
| RU2184386C1 (en) * | 2001-08-15 | 2002-06-27 | Открытое акционерное общество "Татнефть" Татарское геолого-разведовочное управление ОАО "Татнефть" | Method for exploring underground water contamination areas |
| CN101936832A (en) * | 2009-12-24 | 2011-01-05 | 刘立安 | New method for particle size analysis of ferruginous cemented mud rock |
Non-Patent Citations (2)
| Title |
|---|
| 李家彪: "《中国边缘海形成演化与资源效应》", 30 November 2008, 海洋出版社 * |
| 王啸 等: "Nd-Sr同位素对沉积物源的制约-以滴哨沟湾剖面为例", 《干旱区研究》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777215A (en) * | 2015-04-23 | 2015-07-15 | 中国水利水电科学研究院 | Method for determining watershed scale individual rainfall sediment sources |
| CN104777215B (en) * | 2015-04-23 | 2017-11-14 | 中国水利水电科学研究院 | A kind of method for determining Watershed Scale time rainfall sediment source |
| CN110646496A (en) * | 2018-06-26 | 2020-01-03 | 中国科学技术大学 | Method for identifying hairy crab producing area by strontium isotope |
| CN109297999A (en) * | 2018-11-22 | 2019-02-01 | 李熙 | A kind of measuring method of inner continental shelf sea area sediment source |
| CN113433201A (en) * | 2021-06-21 | 2021-09-24 | 浙江理工大学 | Method for sequentially extracting strontium isotopes for silk cultural relics |
| CN114324552A (en) * | 2021-11-30 | 2022-04-12 | 中国地质调查局西安地质调查中心(西北地质科技创新中心) | Method and system for performing Sr isotope analysis on Sr-rich mineral or rock |
| CN114324552B (en) * | 2021-11-30 | 2024-03-29 | 中国地质调查局西安地质调查中心(西北地质科技创新中心) | Method and system for performing Sr isotope analysis on Sr-rich minerals or rocks |
| CN115546340A (en) * | 2022-10-20 | 2022-12-30 | 中国科学院广州地球化学研究所 | Exploration method for screening porphyry copper target area by utilizing isotope mapping |
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Application publication date: 20141224 |