GOP

Question 1

3 major plates surrounding the PH

Answer 1

Pacific
Eurasian
Indo-Australian

Question 2

Age of Pacific Plate

Rate of movement

Answer 2

150 MY (Late Jurassic)

80mm/yr

Question 3

Kinematic Reorganization in Pacific Plate

Answer 3

43 MY (Eocene) 50⁰ Counter Clockwise Rotation from NNW to WNW

5 MY (Late Pleistocene) - 10⁰ counter CW Rotation

Question 4

Pacific Plate subducts into

Answer 4

Eurasian Plate along Japan

PSP along Bonin-Marianas yap Trench

Indo-Australian Plate east of New Zealand

Question 5

Eurasian Plate

Rate of movement

Answer 5

3mm/yr

Question 6

Indo-Australian Plate

Rate of movement
Motion Direction

Answer 6

107mm/yr

North

Question 7

Separation of IN and AU

Answer 7

150 MY (Late Jurassic)
Cessation 43 MY (Early Eocene)

Question 8

Submarine Ridges in PSP

Answer 8

Palau-Kyushu Ridge

Izu-Bonin Ridge

Question 9

3 submarine plateaus in WPB

Answer 9

Benham Rise
Urdaneta Plateua
Anami and Oki-Daiko Ridge

Question 10

Age of WPB

Answer 10

60-35 MY Paleomagnetism

53-42 MY Deep Sea Drilling

Question 11

An extinct MOR in WPB

Answer 11

Central Basin Fault

Question 12

Stages of Opening in WPB

Answer 12

60 and 45 MY at NE-SW 4.4cm/year

45 and 35 MY at NS 1.8 cm/yr

Question 13

Origin of WPB

Answer 13

Trapped Ocean Basin

Back-arc Basin Model

Question 14

What basin opened at 30 Ma and 10 Ma?

When did the opening stopped?

Answer 14

Parece Vela Basin - 30 Ma
Shikoku - 10 Ma

Opening ceased at 17 Ma

Question 15

Poorly known portion of on the southern

extremity of the plate

Answer 15

Ayu Basin

Question 16

Opening of Mariana Basin started at ___ Ma.

Answer 16

6 Ma

Question 17

This basin is considered as a relic of arc of

middle Eocene to Oligocene age. It traversed the PSP for 2500km

Answer 17

Palau-Kyushu Ridge

Question 18

When did the transform fault in Palau-Kyushu Ridge turned into a subduction?

a. Eocene
b. Oligocene
c. Miocene
d. Pliocene

Answer 18

43 Ma

a. Eocene

Question 19

Subduction of Palau-Kyushu Ridge retreated eastward at ___ Ma

Answer 19

30 Ma

Question 20

This basin is the eastern limit of the Shikoku Basin

Answer 20

Izu-Bonin Ridge

Question 21

The Izu-bonin Ridge splits into two branches towards the south

Answer 21

West Mariana Ridge

East Mariana Ridge

Question 22

An ancient volcanic arc active between 20 - 9 Ma

Answer 22

West Mariana Ridge

Question 23

Present day kinematics of PSP with respect to Eurasia

Relative displacement rate that varies from N to S along the western edge of the PSP, from ___ cm/yr in the latitude of the Nankai Trough to around ___ cm/yr on the southern end of the Philippine Trench

Relative displacement direction whose azimuth is directed N55W near Taiwan with a linear velocity around __cm/yr

Answer 23

1. 3cm/yr
2. 9cm/yr
3. 7cm/yr

Question 24

Which of the following is false?

a. To the North, PSP subducts under the Japanese Archipelago along Nankai and Ryukyu Trench
b. To the SW, PSP subducts into PH Archipelago along PH Trench System
c. PSP Collides with the Eurasian margin in Taiwan
d. To the E, PSP is defined by the Bonin-Marianas-Yap
Trench system

Answer 24

A. To the North, PSP subducts under the Japanese Archipelago along Nankai and Ryukyu Trench

Answer

To the NW, PSP subducts under the Japanese Archipelago along Nankai and Ryukyu Trench

Question 25

Marginal basins with Eurasian Affinity | 3

Answer 25

Sulu Sea Basin South China Sea Basin Celebes Sea Basin

Question 26

Volcanic arc of the presently active Marianas Trench  This defines the W and E limits of Marianas Basin

Answer 26

East Mariana Ridge

Question 27

South China Basin a. Depth b. Opened at __ and __ Ma Opening was preceded by rifting that could have taken place between the Late Cretaceous and Late Eocene

Answer 27

a. 4km b. 2 stages of opening 32 to 17 Ma along E-W axis 20 to 17 Ma along NE-SW axis

Question 28

Model used in Eurasian and Indo-Australian Collision that shows the shearing of China.

Answer 28

Plasticine Model

Question 29

Situated immediately to the southeast of Palawan, this small marginal basin compose two subbasins that are separated by an east-northeast trending the Cagayan de Sulu Ridge.  Formed starting ~ 20 Ma (early Miocene)

Answer 29

Sulu Sea Basin

Question 30

Ridge that separates the Sulu Sea Basin from the Celebes Sea Basin

Answer 30

Sulu-Zamboanga Ridge

Question 31

Sedimentary Basins with PMB affinity | 9

Answer 31

1. Ilocos- Central Luzon Basin 2. Cagayan Valley Basin 3. Southern Luzon- Bicol Basin 4. Mindoro Basin 5. Iloilo Basin 6. Visayan Sea Basin 7. Samar Basin 8. Agusan- Davao Basin 9. Cotabato Basin

Question 32

Active Volcanic Arcs

Answer 32

1. Luzon Volcanic Arc 2. East- Philippine Volcanic Arc 3. Negros-Panay Arc 4. Sulu- Zamboanga Arc 5. Cotabato Arc

Question 33

Complete Ophiolite in the PH

Answer 33

Zambales, Isabela, | Palawan, Pujada

Question 34

Youngest Ophiolite in PH

Answer 34

Mindoro (Amnay)

Question 35

Pre- Cretaceous Metamorphic Rocks | of Continental Origin:

Answer 35

``` Caramay Schist Halcon Metamorphics Romblon Metamorphics Buruanga Metamorphics Tungauan Schist ```

Question 36

SEDIMENTARY BASIN and FILL THICKNESS 1. Ilocos- Central Luzon Basin 2. Cagayan Valley Basin 3. Southern Luzon- Bicol Basin 4. Iloilo Basin 5. Visayan Sea Basin 6. Agusan- Davao Basin 7. Cotabato Basin

Answer 36

1. 8000m 2. 8100m 3. 4600m 4. 5000m 5. 4000m 6. 12000m 7. 8000m

Question 37

3 segments of PFZ

Answer 37

Northern Segment NW Luzon to Lamon Bay Central Segment Bondoc Peninsula to Leyte Southern Segment Mindanao to Moluccas

Question 38

Also known as the Valley Fault System

Answer 38

Marikina Valley Fault

Question 39

Other active faults (11)

Answer 39

1. Marikina Valley Fault 2. Macolod Corridor 3. Lubang-Verde Passage Fault System 4. Mindoro/Aglubang Fault 5. Sibuyan Sea Fault 6. Legaspi Lineament 7. Tablas Lineament 8. Mindanao Fault 9. Offshore Cebu and Bohol Fault 10. North Bohol Fault 11. Negros Thrust

Question 40

True or False The Izu-bonin Ridge splits into two branches towards the west.

Answer 40

False | South

Question 41

What basin opened at 1. 60 - 35 MY 2. 30 MY 3. 10 MY 4. 6 MY

Answer 41

1. WPB 2. Parece Vela Basin 3. Shikoku 4. Mariana Basin