Analysis of Sandstone in Leshan Giant Buhhda Based on Hand-Held X-Ray Fluorescence Spectrometer

Hao LU; Wan-lu FU; Jun CHAI; Shuang LIU; Zuo-yu SUN

doi:10.3964/j.issn.1000-0593(2022)08-2506-07

位置

宏观照片

偏光镜照片

鉴定特征

佛首

石英含量85%,磨圆分选高,直径0.2 mm;岩屑含量10%,表面多高岭土化或绢云母化,或为石英小颗粒集合体,直径约0.2 mm;次生矿物褐铁矿含量约5%,或呈小颗粒,多以薄壳形式包被于其他矿物颗粒边缘;偶见斜长石和黑云母

胸部—上腹

石英含量85%,磨圆分选差,粒径主要为0.1~0.6 mm;岩屑含量10%,磨圆较好,表面多高岭土化,粒径约0.1~0.3 mm;斜长石含量2%,呈半自形短柱状,直径约0.1 mm;次生矿物褐铁矿含量3%,少数呈粒状,多数以薄壳形式包被于其他矿物颗粒边缘;矿物颗粒间几乎无胶结物,孔隙度高

膝盖

层理发育,深红层为褐铁矿-岩屑层,浅红层为方解石-石英层;石英含量30%~50%;方解石含量增加,约15%,粒径多10~20 μm,层间缝隙由方解石和石英颗粒充填;发育少量云母,基本不含褐铁矿;岩屑几乎完全绢云母化

小腿

石英含量80%,他形粒状,磨圆度较低,呈次棱角状;分选较好,直径约0.3~0.4 mm;岩屑含量10%,磨圆度较好,为次圆状,表面多高岭土化或绢云母化,或为石英小颗粒集合体,岩屑直径约0.3 mm;黑云母和白云母含量共约3%,呈片状或长条状,长度约0.25 mm;斜长石含量约2%;褐铁矿含量约5%

脚部

石英含量90%,次棱角状至次圆状,粒径大多为0.45 mm;岩屑含量5%,表面绢云母化,粒径为0.4~0.5 mm;石英和岩屑边缘被褐铁矿薄壳包被

深度/m

SiO₂

CaO

Al₂O₃

Fe₂O₃

MgO

K₂O

MnO

P₂O₅

TiO₂

42.0

60.358

16.254

8.880

5.278

4.607

1.935

0.460

0.086

0.336

0.840

0.045

41.5

60.657

16.275

9.470

4.611

2.892

1.877

0.771

0.087

0.239

0.873

0.707

41.0

61.857

16.415

10.112

5.072

1.696

2.131

0.361

0.116

0.462

0.949

0.108

40.5

71.357

11.242

8.701

2.485

2.222

1.782

0.437

0.081

0.206

0.342

0.269

40.0

57.175

18.770

7.350

3.831

2.056

1.812

2.720

0.060

0.267

0.405

0.114

39.5

69.576

10.533

7.061

4.630

2.391

2.392

0.534

0.101

0.797

0.386

0.530

39.0

58.355

22.345

6.535

4.108

2.040

1.928

0.889

0.065

0.193

0.581

1.182

38.5

64.750

16.511

9.613

3.400

1.951

1.825

0.243

0.057

0.290

0.588

0.285

38.0

62.934

15.914

9.593

3.732

3.396

1.869

0.424

0.075

0.255

0.554

0.406

37.5

53.890

21.548

7.521

4.155

2.475

1.548

2.460

0.075

0.327

0.637

0.444

37.0

65.351

16.625

7.452

3.099

1.701

1.590

0.954

0.078

0.162

0.477

0.605

36.5

66.172

16.314

6.666

2.565

1.473

1.449

1.221

0.043

0.113

0.444

1.098

36.0

64.669

15.965

6.280

3.152

2.540

1.505

0.962

0.049

0.216

0.484

2.254

35.5

62.610

10.647

6.178

4.099

0.000

1.410

3.693

0.067

0.212

0.476

3.222

35.0

57.712

10.146

6.179

4.347

1.847

1.564

5.349

0.088

0.199

0.505

1.368

34.5

77.920

4.176

6.883

2.392

2.113

1.558

1.032

0.040

0.110

0.126

1.585

34.2

53.461

19.954

8.169

4.007

2.054

1.690

3.046

0.065

0.380

0.551

0.531

34.0

58.865

19.094

7.131

4.136

1.634

1.557

1.528

0.091

0.207

0.607

2.093

32.5

58.501

17.442

8.515

5.888

3.857

2.080

0.448

0.109

0.628

0.896

0.740

32.0

60.154

20.587

7.763

3.758

3.055

2.074

0.285

0.081

0.530

0.954

0.188

31.5

53.019

24.827

6.661

5.629

3.081

2.195

0.890

0.104

0.537

0.904

0.373

31.0

66.102

15.123

8.611

3.525

2.079

1.989

0.294

0.099

0.555

0.646

0.388

30.5

60.000

16.141

10.757

4.487

2.312

2.316

0.703

0.095

0.470

0.928

0.383

30.0

64.002

11.589

11.796

4.494

3.664

2.149

0.442

0.067

0.236

0.679

0.000

29.5

66.926

14.223

8.572

3.669

2.134

1.813

0.411

0.076

0.265

0.624

0.465

29.2

68.830

13.124

8.448

2.770

1.760

1.674

0.597

0.053

0.171

0.376

1.004

29.0

60.662

15.061

8.062

4.603

3.306

1.915

1.251

0.069

0.298

0.715

1.555

28.5

69.701

14.034

7.315

2.926

1.521

1.557

0.178

0.068

0.252

0.559

1.533

28.0

75.337

9.396

7.049

2.056

1.844

1.912

0.389

0.039

0.125

0.308

0.767

27.5

54.210

19.981

5.552

2.911

4.284

1.242

3.395

0.053

0.204

0.347

1.031

27.0

65.385

14.862

8.905

2.719

2.217

2.063

0.305

0.081

0.157

0.348

2.348

26.5

67.009

9.784

11.601

4.245

1.780

2.393

0.703

0.069

0.131

0.618

0.262

26.0

72.341

9.357

10.169

2.444

1.966

1.926

0.299

0.039

0.270

0.381

0.211

25.5

61.608

14.709

8.754

3.305

3.606

1.738

1.706

0.051

0.186

0.604

0.321

25.0

66.967

11.860

10.020

3.940

1.478

2.060

0.564

0.052

0.174

0.780

0.977

24.5

66.619

13.720

8.304

4.042

2.762

1.962

0.422

0.059

0.251

0.568

0.449

24.0

66.236

13.502

10.638

3.134

2.254

1.954

0.250

0.072

0.385

0.740

0.334

23.5

71.489

9.709

9.886

2.603

2.727

2.125

0.160

0.046

0.271

0.453

0.210

23.0

68.250

10.019

11.140

3.482

2.612

2.168

0.326

0.077

0.310

0.775

0.188

22.5

67.623

12.038

10.237

3.500

2.341

1.981

0.382

0.063

0.322

0.638

0.111

22.0

68.819

8.948

11.671

3.761

2.760

2.117

0.264

0.060

0.249

0.681

0.142

21.8

67.503

7.997

13.195

4.177

2.391

2.416

0.417

0.058

0.223

0.693

0.097

21.5

60.533

15.909

7.492

4.248

2.684

1.810

0.675

0.069

0.251

0.782

4.198

21.0

69.894

9.659

11.531

2.938

1.773

2.141

0.303

0.047

0.393

0.551

0.166

20.5

59.539

15.377

5.252

2.889

2.307

1.573

3.786

0.036

1.282

0.144

0.243

20.3

43.645

41.214

2.638

3.129

4.703

1.651

0.673

0.036

0.470

0.461

0.033

20.0

47.203

38.136

3.881

2.608

3.081

1.614

0.537

0.049

1.111

0.566

0.139

19.5

47.326

36.066

3.961

2.560

5.000

2.116

0.643

0.051

0.592

0.348

0.051

19.0

67.568

13.167

9.096

3.201

3.323

1.907

0.328

0.059

0.143

0.539

0.014

18.5

62.562

13.361

6.842

2.790

1.413

3.369

3.007

0.034

0.284

0.292

0.031

18.0

68.730

14.011

7.795

2.443

2.906

2.077

0.403

0.034

0.207

0.522

0.067

17.5

64.899

12.369

7.836

2.886

2.770

1.655

2.243

0.045

0.212

0.448

0.152

17.0

65.721

11.979

7.373

2.987

2.802

1.439

2.186

0.043

0.248

0.392

0.459

16.5

59.968

13.716

9.020

3.677

2.057

1.744

2.859

0.049

0.245

0.420

0.528

15.5

47.287

21.871

5.014

3.888

1.919

1.677

5.570

0.060

0.355

0.474

0.744

15.0

57.928

17.667

7.860

3.241

2.835

1.536

2.463

0.054

0.295

0.490

0.704

14.5

65.595

14.369

8.227

2.863

1.820

1.634

1.373

0.043

0.269

0.561

0.502

14.0

63.825

16.217

6.382

2.676

1.641

1.633

1.960

0.043

0.218

0.466

1.019

13.5

54.127

21.318

5.144

3.644

0.000

2.008

2.675

0.048

0.261

0.451

4.974

13.0

70.022

13.361

6.785

2.447

1.503

1.726

0.112

0.048

0.268

0.381

3.122

12.5

68.184

14.767

7.045

2.563

0.000

1.840

0.144

0.044

0.219

0.364

4.540

11.5

47.950

25.082

4.113

4.187

0.000

1.357

6.334

0.047

0.482

0.465

2.514

11.0

64.272

14.418

8.300

3.191

2.991

1.958

1.180

0.040

0.158

0.525

0.607

10.5

54.963

17.260

7.703

3.531

2.303

2.278

2.918

0.055

0.418

0.432

2.303

10.0

53.093

18.382

8.354

6.123

1.610

2.195

2.398

0.068

0.277

0.737

1.967

9.5

60.484

12.873

11.402

4.341

3.871

2.294

1.057

0.077

0.380

0.725

0.382

9.0

65.204

15.730

7.918

2.648

2.479

1.557

0.975

0.058

0.298

0.564

0.622

8.5

55.877

17.979

6.066

4.128

0.991

1.517

3.376

0.045

0.316

0.489

2.462

8.0

56.070

14.333

8.881

4.926

0.000

1.994

3.838

0.086

0.338

0.577

1.282

7.5

75.397

7.968

8.617

2.384

1.171

1.908

0.630

0.043

0.272

0.296

0.053

7.0

62.955

13.182

6.728

3.347

0.000

1.673

1.980

0.041

0.154

0.314

5.667

7.2

64.892

12.870

6.709

3.133

1.377

1.729

2.406

0.044

0.312

0.369

1.348

6.5

65.168

11.349

11.142

3.974

4.299

2.028

0.057

0.050

0.275

0.606

0.937

6.0

65.504

13.282

10.755

4.633

2.218

2.075

0.101

0.061

0.346

0.700

0.123

5.5

61.681

17.492

9.213

4.358

2.516

1.852

0.440

0.084

0.282

0.736

0.464

5.0

65.118

11.679

11.049

4.308

3.517

2.222

0.148

0.072

0.211

0.837

0.543

4.5

68.579

11.919

10.481

3.240

2.367

1.841

0.175

0.060

0.211

0.506

0.270

4.0

66.568

13.523

9.655

3.634

2.342

1.792

0.479

0.078

0.171

0.573

0.229

3.5

67.323

12.515

10.620

3.519

2.153

1.762

0.231

0.053

0.205

0.649

0.508

3.0

68.341

10.934

7.949

2.605

2.164

1.562

1.935

0.038

0.191

0.282

0.129

2.5

72.727

8.886

9.919

2.485

1.270

1.964

0.157

0.042

0.139

0.360

1.739

2.0

74.146

6.603

8.146

2.759

1.892

1.819

1.258

0.037

0.067

0.320

0.437

1.5

73.073

11.353

7.164

2.235

1.619

1.284

0.839

0.086

0.318

0.303

0.048

1.0

76.896

9.424

6.370

1.767

2.302

1.329

0.472

0.044

0.224

0.228

0.000

0.5

49.001

20.490

4.660

3.376

1.739

1.567

5.788

0.054

0.464

0.321

0.963

0.2

54.726

19.207

5.438

3.683

1.711

1.326

3.991

0.036

0.305

0.461

1.136

0.0

52.937

19.207

5.238

3.045

0.000

1.774

4.128

0.043

0.380

0.013

4.981

Hao LU, Wan-lu FU, Jun CHAI, Shuang LIU, Zuo-yu SUN. Analysis of Sandstone in Leshan Giant Buhhda Based on Hand-Held X-Ray Fluorescence Spectrometer[J]. Spectroscopy and Spectral Analysis, 2022, 42(8): 2506

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