序号

词频

词簇

序号

词频

词簇

1

552

model

26

169

sediment

2

439

rock

27

168

occur

3

435

age

28

164

arc

4

413

data

29

161

condition

5

285

process

30

158

provide

6

272

study

31

156

crust

7

263

time

32

156

evolution

8

259

zone

33

156

pb

9

246

ocean

34

156

sample

10

239

zircon

35

155

crustal

11

225

system

36

155

late

12

209

form

37

155

record

13

208

climate

38

153

global

14

208

water

39

153

rate

15

206

mantle

40

152

fault

16

203

formation

41

150

region

17

200

base

42

149

complex

18

196

temperature

43

148

deposit

19

193

source

44

148

earth

20

193

surface

45

148

tectonic

21

187

melt

46

144

composition

22

185

scale

47

144

low

23

179

range

48

143

increase

24

170

subduction

49

142

continental

25

169

event

50

140

ice